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Hongwu International Group Ltd.

We, Hongwu International Group Ltd, are offering different shape & size Nanoparticles, Nanopowders, Nanowires, Micropowder,Surface Coating, Dispersion for pure silver powder series material.

Silver nanoparticle, extra-fine grade from 20nm to 20um,customized.Ensure reliability and reproducibility of the results with 99.99 pure silver powder.Our Silver nanoparticles is new and freshly prepared. The powder is packaged in clear double layer antistatic bag.

In addition to the powder form, we also provide wet silver powder with deionized water for avoiding the occurrence of agglomeration.we know that for tens of nanoscale powder, Fan Dehua forces and electrostatic forces between the particles present in the particles bonded into a group, known as soft agglomerates, the smaller the particle, the more significant agglomeration, upon application of improper handling will cause irreversible hard agglomerates, especially it is not suitable for precision fine-line printing.

Our Silver nanoparticle is available in a wide range of quantities and specifications to meet your particular industrial or scientific application. For further technical information or pricing on Silver powder

silver nanoparticles properties:
Powder, Dispersions, Functionalized Spherical,In Business since 2002，Full Consultancy Services
solid or liquid form: Dry pure silver powder, and wet nanosilver
Particle size is approximately 20 nano to 20 microns.
Mophology: Spherical,nanowire,flake and dendritic(flake and dendritic mainly for micron grade silver powders)
Nano sized Silver Powder has been known to kill germs,and micron sized silver powder known to be conductive
Non toxic.
Not impact sensitive.
Will not explode or ignite when struck between heavy objects.

silver nanoparticles color:
the different particle size own diverse color,for example,black 20nm silver powder,brown yellow sub-micron silver powder,silver grey 1um flaky silver powder and 5um shiny silver powder,etc.

silver nanoparticles applications:
Used by Biologists to study the germicidal effects (HW-A110).
Used by Artists to plate silver oil for a beautiful color(HW-B117).
Used by engineers as good conductive material, such as solar cell cathode silver powder(HW-B115),conductive coating,conductive pastes,conductive inks and fillers.
Used by Scientists in research
Used as optical material,silver nanoparticles are used to efficiently harvest light and for enhanced optical spectroscopies.
More use:catalysts,EMI/RFI shielding material,etc.

If you want to buy silver nanoparticles,our experienced and dedicated team is ready for help. Do not hesitate to contact us at hwnano@xuzhounano.com

Related reading:nano silver powder for sale     buy nano silver powder

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Various Applications of Boron Nitride powder

Hexagonal boron nitride is a kind of loose white powder, similar to the properties of graphite, which has known as the “white graphite”. It has good electrical insulation, thermal resistance and chemical resistance; anti-oxidation temperature can up to 900 ℃. Because hexagonal boron nitride has low coefficient of thermal expansion and high thermal conductivity, its thermal shock resistance is excellent.

Solid Boron Nitride with a variety of excellent performance that can be widely used in high-voltage high-frequency electric insulators and plasma arc, automatic welding temperature frame coating, high frequency induction furnace materials, semiconductor phase admixture, atomic reactor construction materials, packaging materials to prevent neutron radiation, radar transfer window, the media radar antenna and composition of rocket engines and so on.

Hexagonal boron nitride is not only a good conductor of heat, but also the typical electrical insulator. HBN has excellent chemical stability. For most molten metals, such as steel, stainless steel, Al, Fe, Ge, Bi, Cu, Sb, Sn, In, Cd, Ni, Zn, etc., it is neither wetting nor acting with each other. Therefore, it is used as a high temperature thermocouple protection kits, molten metal crucibles, containers, liquid metal pipeline, pump parts, mold steel and high-temperature electrical insulation materials. Hexagonal boron nitride (HBN) has a high thermal conductivity, low dielectric constant and dielectric loss, reliable electrical insulation properties, low coefficient of thermal expansion, good thermal shock resistance, excellent processing performance, for most metals are not invasive, light, infrared and microwave-transparent, and has very high heat resistance, excellent performance, which is an important aerospace materials that has been widely used in launch vehicles, spacecraft, missiles, satellites and other spacecraft radio system. This new material has many excellent properties with hardness better than diamond crystal, tougher than commercial carbide, and cubic boron nitride anti-oxidation temperature higher than the single crystal itself, HBN is expected to become a new generation of steel materials processing industry in the tool material so there is no doubt that it has broad application prospects.

We Hongwu International Group Ltd., a high-tech enterprise that can manufactures hexagonal boron nitride powder with high purity and quality and particle size varying from 100nm to 5um. Should you have any needs or questions about HBN, please don’t hesitate to contact us.

 

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Carbon Nanotubes

HW Carbon Nanotubes available in single, multi walled, COOH an OH fuctioned Functionalized CNts, different diameter, length, and purity you can choose. Widely used in many fields by customers around the world.

 

The carbon nanotubes can be filled with metal, oxide and other substances, so that carbon nanotubes can be used as a mold, first with metal and other substances filled with carbon nanotubes, then carbon layer corrodes, a fine nanoscale conductor wires or a new one-dimensional material has been created , can applied in the future molecular electronic devices or nanoelectronic devices. Some of the carbon nanotube itself can also be used as nano-scale conductor wire. Therefore, the use of carbon nanotubes or related technology to prepare micro wires can be placed on a silicon chip to produce more complex circuits.

 

Hydrogen is considered as the clean energy of the future by many people .Hydrogen itself, however, for it’s low density it’s not convenient to compressed into a liquid storage. Carbon nanotubes’ lightweight and hollow structure make it a good reservoir of hydrogen, the density is even higher than the density of liquid or solid hydrogen. Proper heating, hydrogen can be slowly released.

 

The properties of carbon nanotubes can be used to fabricate many composite materials with excellent properties, such as excellent mechanical properties, good electrical conductivity, corrosion resistance and shielding of radio waves with carbon nanotubes materials. Carbon nanotube composites using cement as matrix has high strength, good impact resistance, anti-static, wear-resistant, high stability properties, difficult to impact on the environment.Carbon nanotubes reinforced ceramic composite materials with high strength, good impact resistance.

 

  • Carbon nanotubes also provide physicists with the finest capillaries to study the capillary mechanism, providing the chemist with the finest nanotube reaction tubes. The tiny particles on carbon nanotubes can influence the electric current shaking frequency of the carbon nanotubes. Based on this, in 1999, Brazil and the United States scientists invented a nanoscale of 10-17kg accuracy, able to weigh the quality of a single virus. Then the German scientists developed a single atom can be measured in the ” Nano-scale. “

 

 

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Yttria stabilized zirconia powder Application

HW provide 3YSZ,5YSZ,8YSZ powder, size available from nano to micron size. Also can do customization. Below is the ,man application of Yttria stabilized zirconia powder.

 

  1. 1. Yttria stabilized zirconia powderas refractory material, widely used in Electronic ceramic bearing plate burning, glass, metallurgy molten metal.

 

  1. Due to yttrium stable nanometer zirconium oxide powder’s high oxygen ionic conductivity and ideal stabilityin REDOX atmosphere, it isa kind of ideal electrolyte has been widely applied in the field of solid oxide fuel cell, has the good market application prospect and commercial value.

 

  1. Yttrium stabilized zirconia powder has the characteristics of strong thermal shock resistance, high temperature resistance, good chemical stability and outstanding material composite. Yttrium stabilized zirconia powder and other materials (Al2O3, SiO2) composite, can greatly improve the performance parameters of the material and improve its fracture toughness, bending strength. Therefore, Yttrium stabilized zirconia powderis not only used in the field of structural ceramics and functional ceramics, but also in improving the surface properties of metal materials (thermal conductivity, thermal shock resistance, high temperature oxidation resistance, etc.).

 

  1. Yttrium stabilized zirconia with high hardness and wear resistance, has been widely usedin the field of grinding medium and grinding tool, such as ball mill and ball mill interior lining and wear parts, wire drawing die, etc.

 

  1. Used in functional ceramics, structural ceramics, especially electronic ceramics, bio-ceramics (such as: denture), we havea 3YSZ powder Specialized for dental use.

 

  1. Yttria stabilized zirconiapowder use in piezoelectric elements, oxygen-sensitive resistors, bulk capacitors, solid oxide fuel cells (SOFC) and oxygen sensors.

 

  1. Yttria stabilized zirconiapowder use as artificial gem materials, abrasive materials

 

  1. The additionof Yttria stabilized zirconia increase the ceramic structure toughness strength, the surface finish is good, and ceramic dense compact, resistant to beat.

 

Future information, pls feel free to contact us.

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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.