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nano-alumina Al2O3

By virtue of its special properties, nano-alumina is widely used in chemical and chemical industry, medicine, catalyst and its carrier, ceramics and other fields. In ceramic applications, precision ceramics made by nano alumina powder have the similar metal plasticity and toughness, light weight, in particular, greatly enhance the strength. By adding a small amount of micron or nano-alumina in the conventional ceramic matrix can make the mechanical properties of materials doubled improve the toughness of ceramics to reduce its sintering temperature.

 

As a new composite material and medical materials, nano-alumina Al2O3 can be used as dispersion strengthening and additives, such as cast iron with nano-Al2O3 grinding powder as a metamorphic nucleation, wear resistance can be improved several times. Nano-alumina as a new medical material, has been used to make the bearing force of artificial bone, dental root implants, drug delivery carrier, etc .; also successfully carried out alveolar ridge expansion, maxillofacial reconstruction, orthopedic and repair. As an optical material and surface protective layer of nano-alumina material can absorb ultraviolet light, and in some wavelengths of light excitation can be generated with the particle size of the wavelength of light. Αlpha-Al2O3 can be sintered into a transparent ceramic to use as a high-pressure sodium lamp material; as well as can be used as a compact fluorescent lamp in the protective layer of the phosphor layer; and mostly can made of fluorescent light-emitting materials rare earth phosphor composite to improve lamp life .

 

Hongwu International Group Ltd, with HWNANO brand, can supply nano-alumina powders with high purity and quality. Based on the existing scientific research as production-oriented, closely learning domestic and foreign advanced technology, and constantly improving and enhancing the production process to ensure that providing customers with good quality and stable products. We also can supply customized nano material according to your request. Shall you have any questions, please don’t hesitate to contact us at hwnano@xuzhounano.com.

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Nano Zirconia powder

Zirconia powder is also called Zirconium oxide powder. HW nano zirconia powder available in nano size and micron size(70-80nm,0.3-0.5um, 1-3um, YSZ), which has uniform particle size distribution, no hard reunion and good sphericity, size and purity are adjustable according to customer’s requirements.

 

The nano zirconia powder can be used for making metal zirconium and zirconium compounds, and the crucible refractory brick, high-frequency ceramic, ceramic pigment and zirconium salts are mainly used for piezoelectric ceramics, daily-use ceramics, refractory materials and precious metals smelting with brick of zirconium, zirconium tube, crucible, and so on. Also can be used in the production of steel and non-ferrous metals, optical glass and zirconium dioxide fiber.

 

Nano Zirconia powder using as Zirconia structural ceramics material:

1975 Australian R.G.Garvie use calcium oxide as stabilizer had get partially stabilized zirconia, and it’s the first time use zirconium oxide martensite phase transformation toughening effect to increase the toughness and strength, greatly extend the application of the zirconia in the field of structural ceramics.

 

Nano Zirconia powder using as thermal barrier coating material:

The application of Plasma spraying cubic zirconia thermal barrier coating in aerospace and industrial gas turbine has gain great progress, it has been used in gas turbine turbine parts. With this coating, the high temperature parts can reduce the temperature 50 ~ 200 ℃, thus can significantly improve the durability of the high temperature parts, or allow to improve gas temperature or reduce cooling gas, maintain the high temperature parts under constant temperature to improve the efficiency of the engine.

 

Nano zirconia powder using as polishing material:

It can be used as polishing material for soft lenses, camera lenses, precision optical glass material, soft water glass products, infrared filter, BK – 7 final polishing, asphalt, also can used as precision polishing material for Ceramics and silicon.

 

Nano zirconia powder using as Biomedical material:

Zirconium-containing compounds are used in many biomedical applications including dental implants and other restorative practices, knee and hip replacements, and middle-ear ossicular chain reconstruction.

Alisa

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Application of Nano-silver Antibacterial Agent

Nanotechnology is the 21st century’s most promising emerging technology, widely used in information, biological, pharmaceutical, chemical, aerospace, energy, defense and other fields, which has huge market potential. Nanoparticles are particles in the particle diameter between 1~100nm, also referred to as ultrafine particles. Excellent performance of nanomaterials depends on its unique microstructure. Nanoparticles having a small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, which shows a material different from conventional thermal, optical, electrical, magnetic, catalytic and sensitive properties.

Nano-silver material has a very stable chemical and physical properties that has a very excellent performance in many aspects of electrical, optical and catalytic, now widely used in many fields of ceramic materials, environmentally friendly materials and coatings. When silver particles are embedded in the different substrates, the original material exhibits different electrical and optical properties. Nowadays, study on silver nanoparticles is still a hot spot with a wide application. At present, nano-silver antibacterial nonwoven fabric as raw material of a variety of medical, health, household and industrial use antibacterial products have been listed.

On the domestic market, the successful launch of nano-silver wound paste, paste nanosilver burns and has dual protective effect of nano silver antimicrobial masks. In recent years, a seriou of products have developed in market, such as a nano-silver antibacterial sanitary napkins, sanitary pads nano-silver, nano-silver antibacterial diapers etc. The newly developed nano-silver antibacterial deodorant antibacterial socks and various types of air filter media, antibacterial wipes, antibacterial mop, antibacterial wipes and the like. Today because of people’s increasing emphasis on health care, nanosilver has excellent antimicrobial efficacy of its products and more widely. Nano silver can also be applied to antibacterial interior wall paint.

Antibacterial interior wall paint can effectively inhibit and kill harmful bacteria in the environment, reduce environmental microbiological hazards on the human body, thus achieving the purpose of the clean environment, the protection of human health, improve the living environment of great significance. Inorganic antibacterial agent is present advantages in safety, durability, broad-spectrum antimicrobial resistance, heat resistance, etc., to overcome the disadvantages of conventional paint mildew fungicides greater toxicity, a soluble, heat, poor durability, and increasingly draw people’s attention.

Currently there are natural antibacterial materials antibacterial materials, organic materials and inorganic synthetic antibacterial antibacterial materials.

In general, natural antibacterial material has the advantage of high security, but it generally short-lived, poor heat resistance, easy re-processing; synthetic organic antibacterial materials having a wide range antibacterial, sterilization speed, etc., but in general it side effects is relatively large, easy hydrolysis, life is short; nano-silver is an inorganic antibacterial material, from the current situation of people in research and development of nano-silver watch, which has a high safety, good heat resistance, antibacterial wide range continuous sterilization of long shelf life and other advantages.

It is precisely because of the nano silver antimicrobial material having the above characteristics and quantum effects of nanomaterials itself and a small effect size and great specific surface features, it attracts so many researchers to so researches and development.

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An Introduction of Superhard Materials

1 superhard material: diamond and cubic boron nitride and diamond and cubic boron nitride as the main component of polycrystalline composite sheet.
2 diamond why not suitable for processing iron-based metal material:
Because diamond can occur chemistry at high temperatures and Fe metal grinding material, diamond carbon and these elements play a role in generating carbides, resulting in sticky knife show and shorten life, processing quality decline, therefore, not suitable for processing diamonds steel, including ordinary steel and various steel toughness. Such materials are generally used cBN tooling.
3 superhard materials in the future major development direction:
Single Crystal Synthesis
(Using different materials, high-temperature high-pressure synthesis of different devices and different techniques, different synthetic single crystal products)
Monocrystalline sorting
(Synthesis of single crystal products, carried out in accordance with different particle shape, particle size, bulk density, impurity content and strength, toughness, heat resistance, and other performance indicators sorting, so that the single crystal is divided into different species)
Surface plating
(After sorting different varieties of a single crystal, the use of chemical plating, electroplating, vacuum plating and other surface plating)
Polycrystalline Manufacturing
(The use of a single crystal diamond or graphite powder and a suitable metal powder and nonmetal powder materials, according to the appropriate formula, using the corresponding process method (high-temperature high-pressure sintering method or direct growth method), manufactured with different shapes, size, performance and polycrystalline purposes)
Thin film growth
(Using low pressure conditions at various vapor deposition growth method for producing a diamond film or a diamond film with special properties and larger size)

Usefulness of superhard materials
(1) Abrasives
Diamond abrasive is mainly used for grinding the following materials, polishing or cutting: carbide, ceramics and refractories, glass, graphite, precious stones, non-ferrous materials and non-metallic materials.
CBN abrasive primarily used for various high-speed steel, bearing steel, cast iron, stainless steel, wear-resistant coating, high-temperature alloys and other hard grind materials grinding and polishing.
(2) tools (including thin film coated tools).
Diamond tools mainly used for various non-metallic materials and non-ferrous materials, turning, milling, boring, drilling and other processes, such as glass, steel, hard plastics, rubber, building materials, carbon fibers, ceramics, refractories, copper, aluminum and composite materials alloys.
CBN tool is mainly used for machining hardened steel, chilled cast iron, stainless steel, high temperature alloys, wear-resistant coating and other materials.
(3) drill.
For geology, petroleum, coal, construction and other exploration and mining.
(4) cutting tools.
Mainly used for cutting stone, building materials, ceramics, refractories, carbon products, semiconductors, precious stones, wood, etc.; also used for road, airport runway, grooving and cutting of building elements.
(5) drawing tool.
The following metal materials for drawing wire and wire rod, tungsten, molybdenum, copper, aluminum, stainless steel, galvanized steel, steel and alloys.
(6) The dressing tool.
Molding trim for ordinary abrasive, plastic, dressing, etc.
(7) other tools.

Related reading: High Purity Graphite Powders natural graphite powders

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Silver Nanoparticles For Printable Electronics And Medical Application

Silver nanoparticles have attracted extensive research interest because of unusal optical, electronic, and chemical properties which depend on their size, shape,composition, crystallinity, and structure. They have been widely exploited for use as microelectronic materials, antibacterial materials, catalystic materials and sensor materials due to these unique properties.

Silver nanoparticles used in electronic device application are generally prepared by chemical reduction methods.Using these methods, silver nanoparticles with spherical,cubic, wire. amd triangular shapes have been manufactured.

Silver nanopaticles are widely incorporated into wound dressings, and are used as an antiseptic and disinfectant in medical applications and in consumer goods. Silver nanoparticles have a high surface area per unit mass and release a continuous level of silver ions into their environment. The silver ions are bioactive and have broad spectrum antimicrobial properties against a wide range of bacteria. By controlling the size, shape, surface and agglomeration state of the nanoparticles, specific silver ion release profiles can be developed for a given application.

We supply silver nanoparticles in 20nm,30-50nm, 50-80nm or more bigger, particle size is adjustable. Contact us for further information.

Related reading: nano diamond powder Silver Nanoparticles Antimicrobial

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New Material Electronic Paste

Electronic paste is a thick film element manufacturing base material is a solid powder and an organic solvent made after three rolling mixed paste. Electronic paste as a new material, far superior to traditional electrical equipment (such as resistance wire, electric heating pipe, etc.), and environmentally friendly, efficient and energy-saving lamps features.
For electronic suspensions, we must first know the function of electronic paste is a filler, a binder and an organic carrier. Common constituent materials and feature the following table.

Electronic paste
Electronic suspensions according to the price level of the conductive phase can be divided into precious metals and base metals electronic pastes electronic slurry.

1. precious metals electronic pastes: Silver is the best electrical properties of metallic materials, usually in silver to add only trace metals, a relatively new technology is added to a slurry of metal compounds to improve the dispersion of the slurry, with the the rapid development of China’s electronics industry, Ag powder material will be widely used in various fields of electronic technology, chemicals, pharmaceuticals and the like.

2.Pd conductive paste: metal palladium also has good electrical conductivity, but within a pure palladium electrode paste used only for high-temperature sintering of multilayer ceramic capacitors and multilayer ceramic capacitors as to the direction of the development of the cryogenic medium, The amount of pure palladium conductive paste will continue to decrease.

3.Au conductive paste: Has developed various types of gold conductor paste mainly divided into three types: with a glass, containing only non-oxide glass, while gold conductor paste containing glass and oxides. No glass gold conductor paste is widely used in bonding aspect of the multilayer wiring conductor and high-power transistor chip and the lead frame.

4.Ag-Pd conductive paste: silver palladium conductive paste, the rate of diffusion of silver ions is only a fraction of silver, and even a number of low-level, Ag-Pd Pd content basis having conductive paste requirements may be, from 5% to 95% range, which 70Ag-30Pd conductive paste is commonly used in MLC electrode paste.

5.Au-Pd conductor system not only high adhesion strength. Weldability good, and can co-firing with Ag-Pd-based resistance paste, forming a low-noise exposure. Au-Pd conductor does not exist diffusion line, so often used for high reliability and multi-layer wiring applications.

Ni Slurry: Ni has good electrical conductivity, chemical stability and weldability, which is the main factor in determining the performance of an electrode slurry. Ni conductive paste is an ideal thick film conductive paste, but to ensure that the surface of Ni metal particles not oxidized at high temperature burning conditions, and high temperature sintering Ni powder sintered metal formed network structure, but with lower combined strength of the ceramic substrate, only by glass bonding.

Cu paste: Cu electrode paste has been developed mainly divided into three types: the glass-containing, added to the oxide-free glass, while the Cu electrode paste containing glass and oxides. Also make sure the surface of Ni metal particles not oxidized at a high temperature burning conditions. The current anti-oxidation technology mainly: Cu powder the surface of silver, the reducing agent slurry was added, the organic phosphorus compound Cu powder processing, dilute polymer solution treatment, coupling treatment and the like.

Zn slurry: usually the fine Zn powder, lead borosilicate glass frit in an organic binder to a certain percentage of the traditional method dubbed slurry. Zn powder can be used as an electrode material PTC thermistor, instead of Ag conductor paste can also greatly extend the life of a plasma display panel.

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Liquid Metal Materials-like nano nickel, nano iron, nano copper powder

Both liquid metal properties of glass, metals, solids and liquids, is a new class of high-performance metallic material.

That amorphous metallic glass, with a long range disorder, short-range order structure characteristics, are thermodynamically metastable, three-dimensional solid state atoms

Topological disorder were arranged in a certain temperature range, to maintain a relatively stable state.

Both liquid metal properties of glass, metals, solids and liquids, is a new class of high-performance metallic material. It has a lot different unique nature from the traditional glass
, and holds the highest number of metallic materials. such as:
1) is by far the strongest materials and metal (minimum yield strength), one of the softest metal material (the highest yield strength and fracture toughness);
2) it is the strongest material ever discovered piercing easiest molding of metal materials, the most corrosion resistant metal material, soaked it in acid, strong alkaline liquid, still intact;
3) having a hardness close ceramics, but can be as soft as plasticine at a certain temperature can be as liquid as flow (superplasticity), so it is micro, one of the best nano-materials processing;
4) the intensity of liquid metal is twice as stainless steel or titanium, easy shaping comparable plastic, combines the advantages of steel and plastic, with the change of the preparation process

Good and reduce costs, the use of liquid metal material will be further clarified.

A liquid crystal material having a conventional metal materials can not achieve the performance of research and development in the field of tremendous prospects for the industry in recent years has been the hot international scientific development, but also made huge achievements, especially Zr based liquid metal, it has become one of the most active metal material. After many years of promotion, the liquid metal has been widely used in electronics, aerospace, sporting goods, medical devices and military fields.

At precent, we could supply liquid form nano nickel, nano copper, nano iron wet powder, it is easier dispersed and safe transportation,welcome to contact us for further information.

 

 

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Inorganic non-metallic materials and metal materials and organic polymer materials

1. Introduction
Usually it refers to as the main inorganic glass, ceramics, graphite, rock as well as organic as the main wood, plastic, rubber and other similar materials. Composed by a crystalline or amorphous. No metallic luster. It is a poor conductor of heat and electricity (except carbon). The poor mechanical properties of metallic materials in general
(Except glass and steel), but some non-metallic materials can replace metal materials, chemical industry indispensable material.
Inorganic non-metallic materials and metal materials and organic polymer materials, is a complete modern material system is an important component.
2. Classification
Non-metallic materials and inorganic materials can be divided into two major categories of organic material. In mechanical engineering, there are many varieties of the more commonly used.
① belong refractory inorganic materials, ceramics, abrasives, carbon and graphite materials, such as asbestos;
② belong to organic materials include wood, leather, adhesives and polymer composite materials ── synthetic rubber, synthetic resin, synthetic fiber;
③ non-metallic fiber-reinforced composite material composed of a resin base.
3. the inorganic material
Inorganic non-metallic materials and metal materials and organic polymer materials, is an important part of contemporary full material System
Minute. Certain elements of an oxide, carbide, nitride, boride, sulfur-based compounds (including sulfides, selenides and tellurides) and silicates, titanates, aluminates, phosphates oxyacid salt inorganic material mainly composed of Pan said. Including ceramics, glass, cement, refractories, ceramics, abrasives and new inorganic materials. Wherein the ceramic word, and ceramics with a similar inorganic material emerging, its extension of the concept is also expanding. In the broadest sense and meaning of ceramic concept almost identical inorganic non-metallic materials.
Production Process Classification
Into ceramics, glass, cement, refractories, ceramics, carbon materials and other categories, while new materials according to their production processes, use and development, and gradually form a number of new classes of materials, such as inorganic composite materials, inorganic porous material . Some species are incorporated by customary traditional categories, such as: ferroelectric, piezoelectric ceramics are incorporated; crystallite glass, fiber optics and other incorporated into the glass.
The main component of classification
Some also in accordance with the main component material classification, silicates, aluminates, titanates, phosphates, oxides, nitrides, carbides materials; according to the material of zoning, there are daily, construction , chemicals, electronics, aerospace, communications, biotechnology, medical materials.
Material properties Classification
Depending on the material properties of points, there are gelling, fire-resistant, heat insulation, wear resistance, electrical conductivity, insulation, corrosion resistance, semiconductor materials; physical state of the material according to points, there are crystal (monocrystalline, polycrystalline, microcrystalline), non- Crystal and composite materials, but also from the appearance of the sub-form material, there are massive, porous, fibers, whiskers, thin film materials.
4. Features
High strength, hardness, high temperature and corrosion resistance. In addition, the cement in the cementitious properties, the optical properties of glass, ceramics on the corrosion resistance, dielectric properties, heat-resistant refractory material in the insulation performance has its excellent characteristics, metal materials and polymer materials less . However, compared with the metal material, breaking it low intensity, the lack of ductility, are brittle materials. Compared with polymer materials, high density, the manufacturing process is more complex. Special Features inorganic non-metallic materials are:
① different features, such as: high temperature anti-oxidation characteristics such as high temperature oxide; alumina, beryllium oxide ceramic high-frequency insulation characteristics; ferrite magnetic properties; a light transmission properties of the optical fiber; diamond, cubic boron nitride The TodayHot} superhard properties; conductive properties conductive material; fast hard early strength cement rapid coagulation, rapid-hardening properties and the like.
② various physical effects and microscopic phenomena, such as: light-sensitive material – electrical, thermal material heat – electricity, power piezoelectric material – electricity, gas sensing materials – the electricity, humidity of materials humidity – electricity and other material for functional physical and chemical parameters of the conversion characteristics between.
③ different nature of the composite material is constituted by a composite material, such as: metal ceramics, high temperature inorganic coatings and inorganic fibers, SiC whiskers, etc. reinforced material.

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Nano 3D Printing Metal Powder, Nano Stainless Steel 316l for 3D Printing

In the field of metal 3D printing, the most widely used is the SLS selective laser sintering technology, SLM selective laser melting technology, EBM electron beam melting technology, LENS near-net-type laser manufacturing technology … whether it is a metal powder is sintered together with the adhesive, or metal powder by hot source melt into liquid “weld” together, these technologies have their own strengths, to meet the various aspects of the finished part geometry and mechanical properties plus work requirements.
The liquid metal itself, a metal powder or solid form, except that the ultra-fine powder of metal nano-uniformly distributed in an “ink” manipulation its “floating” as “liquid”, and then through the high-speed 3D printing technology to print out at temperatures up to 300 degrees to 500 degrees in the high temperature environment, the very fine metal powders to produce another “glue” the situation at a high temperature, so that the printed products having a smooth surface.

HW NANO manufacturing ultrafine nano metal powder such as nano stainless steel 316l powder, nano-nickel powder, nano tungsten powder, nano-titanium alloy, etc. can be used for 3D printing,currently used nano scale stainless steel 316l powder printed effect very well.

 

Related article: Nickel nanopowder/nanoparticle

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CNT reinforced matrix, multi-scale hybrid composites carbon nanotubes

Carbon nanotubes (CNT) has a very excellent strength and stiffness. The advantages of carbon nanotubes can be applied to an attractive prospect in the field of macro-engineering. However, numerous studies have found that since the CNT determines its size only as a non-continuous fibers in a matrix, and the effects of poor load transfer between the CNT and the substrate. Thus, a new way of CNT applications have been proposed, namely by the CNT, the traditional continuous fiber and matrix composition of multi-scale hybrid composites to effectively utilize CNT excellent mechanical properties. This material is known as CNT enhanced multi-scale matrix hybrid composites.
CNT reinforced matrix, multi-scale hybrid laminates made of composite materials, both excellent fiber dominated mechanical properties, but also good mechanical properties of the dominant matrix that is suitable for inter-layer load and shock load environments more frequent, such as aviation Spacecraft special environment in which the load; and the application of this composite material in some large holes in the laminate structure, help to improve the strength and fatigue life of the surrounding holes, thereby enhancing the structure and security of the connection. Therefore, the carbon fiber / CNT enhanced multi-scale hybrid composite matrix has become the new frontier in the field of materials research hot spot.

CNT reinforced matrix, multi-scale hybrid composites
Mixing CNT in the matrix can be increased difference in mechanical properties between the fracture toughness, stiffness and strength, balanced matrix continuous fiber reinforced matrix and reinforcing fibers. Improve the mechanical properties of the matrix control, making composite materials fracture toughness; interlaminar shear strength and mechanical properties perpendicular to the inner surface of the continuous fiber direction are greatly improved. However, due to the size of the characteristics of CNT, CNT reinforced so that the mechanical properties of the composite material far less than people expected better.
Many nature biocomposite also belongs to multiscale hybrid composites, such as animal bones, its composition contains a macro component, microscopic and nanoscopic components composition, elements of these different scales ingredients makes bones with high toughness and high stiffness. Inspired corresponding synthetic multiscale composites (with Nano reinforcing phase) have been proposed, there is a multi-scale component so that it has excellent physical and mechanical properties.

CNT properties:
Carbon nanotubes are significantly better than traditional materials in mamy aspect. Treacy and Wong et al found that single-walled and multi-walled carbon nanotubes axial Young’s modulus of up 1TP or more (up to 4.15TPa), and a tensile strength of 100 ~ 200GPa. Yu et al study demonstrated nanotubes having good ductility, in up to 12 percent prior to tensile failure. Vigolo carbon nanotubes and other woven fibers, which have very good flexibility, fracture does not occur it a knot. Carbon nanotubes also have a strong current carrying capacity and thermal conductivity.
CNT matrix composites
The presence of CNT matrix composite material of carbon nanotubes increases the matrix micro crack propagation resistance, thanks to the bridging mechanism of carbon nanotubes. Gojny found that an epoxy resin with 0.5% by weight of amino-functionalized double-walled carbon nanotubes can improve the fracture toughness of 43%. Yu et al epoxy joined the multi-walled carbon nanotubes 1% and 3% by weight, improves the fracture toughness of 29% and 62%; at 8.67MPa and stress amplitude 11.56MPa of 0.5% by weight of multi-walled carbon nanotube / epoxy composites bending fatigue life is 10.5 times the fatigue life of the epoxy resin and 9.3 times. Zhou and other studies of four kinds of weight content (0.1%, 0.2%, 0.3% and 0.4%), multi-walled carbon nanotubes to enhance the mechanical properties of epoxy composites Epon862, the results showed that 0.4% multi-walled carbon nanotube composites Young’s modulus maximum strength and fracture toughness of the strongest 0.3%, indicating that it will not increase the mechanical properties and CNT content and continue to improve. Fiedler other studies confirmed amino-functionalized CNT to epoxy resins open fracture toughness (KIC) has significantly enhanced the effect of the epoxy resin, 0.3% by volume content of amino functional DWCNTs so open fracture toughness increased by 45%. Cadek and other studies show that multi-walled carbon nanotube reinforced polymer composites not only have good mechanical properties and good dispersion in the matrix. Zou and other studies of the epoxy-functionalized MWNTs reinforced epoxy composite, which can effectively improve the tensile strength and tensile modulus. Breton and other surrounding MWCNT reinforced epoxy composite mechanical properties a study and found that the weight content of CNT composites 6% less than the tensile strength of the tensile strength of the CNT content of 3%. However, the CNT load transfer between the substrate and the CNT Central African continuous fibers and the matrix effect is not good, CNT composites reinforced stretch, compress limited mechanical properties of stiffness and strength.