admin – Page 10 – Silver Nanoparticles Antimicrobial,Copper Oxide Nanoparticles,Gold Nanopowder

November 17, 2017November 28, 2017

Heat dissipation application of graphite powder in LED lamps

The features of graphite powder are soft, dark gray; oily feel that can contaminate the paper. In the isolated oxygen conditions, the melting point above 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; different high temperature reaction with oxygen to produce carbon dioxide or carbon monoxide. It only oxidizes with fluorine and simple carbon in the halogen. Graphite powder is easier to acid oxidation. Besides, it can also react with many metals to form metal carbide, which can be smelted at high temperature.
Graphite powder is the necessary raw materials for industrial production and application. The application of graphite powder has begun to move to the more high-end, which has launched a variety of applications, such as in electronics, new energy, high-end manufacturing, medical and other fields. LED lamps is the environmental protection and energy saving lamps recent years that LED lights cooling is the need to solve the problem of graphite powder.
LED lamps and lanterns of the poor heat can lead to damage to power, light failure accelerated, shortened life and other issues, LED lighting system performance is always the top priority, metal materials in the application of LED cooling difficult to process, energy consumption, density is too large, conductive, easy to deformation and difficult to recover waste and many other issues, and graphite powder material will not be such a problem, graphite powder plasticity is good, easy processing, and has excellent high temperature, thermal conductivity and other properties. Graphite powder can be processed into the graphite heat sink, the heat emitted by the lamp will be absorbed through the graphite heat sink, and even to the surrounding heat, graphite powder and plastic can also be made into a heat sink, cooling the cooling cup and cooling shell and so on.
There are many cooling performance in the application of LED lights, including LED chip packaging components, LED optical lens, light scattering components, efficient cooling components, light reflection and light diffusion board. Graphite powder of high-end products plays an important role in the solar transparent electrode, thermal materials and touch screen and other fields.

September 22, 2017

Magical nano silver powder — seven antibacterial characteristics

The nanometer (nm) is the smallest unit of measure after the micron, and the nanometer is one millionth of one millimeter, that is to say, nanometer is one billionth of a meter. Nano silver powder is made through cutting-edge nano-technology. The emergence of silver powder in the nanometer state, promotes a qualitative leap of bactericidal ability, very few nano-silver can produce a strong bactericidal effect. It can kill more than 650 kinds of bacteria in a few minutes, with broad-spectrum sterilization and no resistance, whihc can promote wound healing, cell growth and repair damaged cells, without any toxic reactions, find no any stimulus response to the skin. All this opens up a broad prospect application of antimicrobial of nano silver powders,and become the latest generation of natural antibacterial agents. Nano silver sterilization has the following characteristics:

1. Broad spectrum antimicrobial

Nano-silver particles directly into the cell, work with oxygen metabolism enzyme (-SH), make the bacteria asphyxia and death of the unique mechanism of action, which can kill contact with most of the bacteria, fungi, mold, spores and other microorganisms. It has found that it has comprehensive antibacterial activity against drug resistant pathogens such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Streptococcus pyogenes, Enterococcus, and anaerobic bacteria. Fungi such as Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans and other G +, G-pathogens have bactericidal effects on Chlamydia trachomatis, causing sexually transmitted diseases. Neisseria gonorrhoeae also has a strong bactericidal effect.
An antibiotic can kill about 6 pathogens, while nanoscale silver can kill hundreds of pathogenic microorganisms. Strong effect to kill bacteria, fungi, trichomoniasis, chlamydia / chlamydia, Neisseria gonorrhoeae, bactericidal, the same effect for antibiotic resistance!

2. Potent sterilization

According to the study, it’s found that Ag can kill more than 650 kinds of bacteria in a few minutes. Nano-silver particles and pathogens after the cell wall / membrane binding, can directly into the cell, quickly with the oxygen metabolism of the enzyme thiol (-SH) binding, the enzyme inactivation, blocking the respiratory metabolism to suffocate. Unique bactericidal mechanism, so that nano-silver particles in the low concentration can quickly kill pathogens.

3. Permeability is strong

Nano-silver particles with superior permeability, can quickly penetrate the skin 2mm sterilization, have a good bactericidal effect on the common bacteria, stubborn bacteria, drug-resistant bacteria and fungi caused by deep tissue infection.

4. Repair regeneration

Nano silver can promote wound healing, promote the repair and regeneration of damaged cells, to rot myogenic, anti-bacterial anti-inflammatory to improve the microcirculation around the wound tissue, effectively activate and promote tissue cell growth, accelerate wound healing, reduce scar generation.

5. Antibacterial lasting

Nano-silver particles using patented technology, a layer of protective film, in the human body can be gradually released, so antibacterial effect

6. Safe and non-toxic

As early as the “Compendium of Materia Medica” records: raw silver, non-toxic; US Public Health Bureau in 1990, “on the toxicity of silver investigation report” that: silver on the human body no obvious side effects; nano silver is topical, Is the safest way to use it. According to the experimental study found that mice in the oral maximum tolerance of 925mg / kg, which is equivalent to the clinical use of 4625 times the dose, without any toxic reactions in the rabbit skin irritation experiments, did not find any stimulus response.

7. No drug resistance

Nano-silver is non-antibiotic fungicide: nano-silver can kill a variety of pathogenic microorganisms, stronger than antibiotics, 10nm size of nano-silver particles unique antibacterial mechanism can quickly kill bacteria directly to the loss of reproductive capacity, therefore, can not produce Drug resistance of the next generation, can effectively avoid the resistance caused by recurrent long-term treatment.

Hongwu Nano, an expert in manufacturering in nanopowders since 2002, especialy nano Silver powders with the best antibacterial property.
High purity,99.99%, good shape,spherical, uniform particle size, easy to disperse nano silver powders are supplied.
Generally speaking, the smaller particle size of Ag nanoparticles, the better bactericidal effect.
Silver nanopowders can not only be available for powders state, but also nano silver antibacterial solution, which is ready to be used, is available.
The concentration of nano silver antibacterial solution is 1000PPM commonly. Other concentration of the solution can be customized.

August 31, 2017August 31, 2017

Nanomaterials closely related to life

Nanotechnology has become a trend, has a great help in our basic necessities of life including Buildings, clothing, food, transportation, medical care, etc. Nanomaterials with dimensions below around 100 nm exhibit unique physical and chemical properties drastically different from their bulk counterparts. The intricate relationship between nanostructure and functionality has opened up a whole new area of research where scientists world-wide aim at exploring, understanding and exploiting the potential of nanomaterials.

1. Sterile tableware and aseptic packaging with nanometer materials makes food more security.

nanomaterial representative: silver nanoparticle, silver nanowire, tio2 nano, etc.

2. That some nanopowders have strong adsorption ability, can make the waste water thoroughly become clear water and reach drinking standard.

nanomaterial representative: Iron nanoparticles, fe3o4 nano, Tio2 nano,etc.

3. Adding nanoparticles to the ceramic can make the material strength and toughness be greatly increased, which is expected to become the ideal material of cars, ships and other engine parts.

nanomaterial representative: silicon carbide nanoparticle, TIC nanoparticles, zro2 nano

4. the micro drug delivery device with nanotechnology can carry a certain dose of the drug in the body, can take the initiative to search for attacking cancer cells or repair damaged tissue.

nanomaterial representative: diamond nanoparticles,iron nanoparticles

5. Adding a small amount of nanoparticles can eliminate electrostatic phenomena of chemical fabric.

nanomaterial representative: ATO nano, TiO2 nano, ZnO nano, carbon nanotube, and metal nanoparticles,etc.

6. Building materials containing nanoparticles and solar thermal reflective material can absorb ultraviolet ray.

nanomaterial representative:TiO2 nano, ZnO nano, WO3 nano, carbon nanotube, etc.

7. Most of us once broke mobile phone or tablet screen.This is a very troublesome thing, we also need to find a place to repair, and pay big money to replace a new screen. Scientists have researched a material that is made of silver nanowires and graphene, which make touch screen be non-friable and flexible, what’s more, it is cheaper.

8. Cosmetics use. platinum nanoparticles, gold nanoparticles, tio2 nano, Zno nano, sio2 nano,etc.

9. More application.

nanoparticles manufacturer

Hongwu International Group Ltd is a Nanotechnology Company manufacturing nanoparticles and nanopowders, developing new nanomaterial based applications for the industry and supplying almost all kinds of nano-micro sized powders and more from worldwide-known companies. Our company provides our customers:

Carbon Nanotubes and Graphene Nanomaterials (almost all kinds are available)

High Quality Nanoparticles and Nanopowders (Elements, Alloys, Metal and Non-Metal Oxides, Compounds)

High Quality Microparticles and Micron Sized Powders (Elements, Alloys, Metal and Non-Metal Oxides, Compounds)

Nanowires

Nanoparticle Dispersions

If you are looking for related products that are not in our product list yet, our experienced and dedicated team is ready for help. Do not hesitate to contact us at hwnano@xuzhounano.com. thank you.

June 30, 2017

Silver nano powder market is expect a fast growth

Nowadays natural resources are far not enough to meet applications need, especially when it comes to high-tech and high-end products and rise new market needs.
Today we’ll discuss the market growth of a high-tech raw material silver nano powder.

1.Silver nano powder is widely used in the electronic industry: High-end silver paste (glue) chip components for external electrode pulp; thick film integrated circuit pulp; solar cell electrode paste, LED chip package with conductive silver plastic; used in printed electronic devices such as conductive ink, etc. The growth of electronic industry will help the growth of silver nano powder.

2.Silver nano powder is widely used for antibacterial. Since silver nano powder’s lasting and special antibacterial function, it is applied to produce antibacterial products: antibacterial Medicine and medical equipment; antibacterial plastic, rubber products, textiles and clothing footwear; antibacterial coatings, ceramics and glass; green antibacterial coatings green home appliances and furniture products etc. More and more manufacturers use silver nano powder to meet market antibacterial need and trend, also take it as a selling point, which customers will buy.

3.Silver nano powder as catalytic, materials Ethylene oxidation reaction catalyst, fuel cell with a supported silver catalyst New energy heat exchange material, etc. Since the small size and high specific surface area, silver nano powder is widely used as catalyst.

In the past years, many researchers are made to explore and testing special applications of silver nano powders in different areas. And now many of them has proved to work good and detailed application technology has get matured. Together with the industries it applied for grows fast. To conclude, silver nano powder are expected a fast growth.

June 23, 2017

Ultrafine Silver Powder Used for Conductive Silver Pastes

Ultrafine Silver Powder Used for Conductive Silver Pastes

Advantages: flexibility, conductivity, good printability, different rheological performance
The composition of the Silver conductive slurry requires different types of silver powders (such as the commonly used silver powders, of which particle size between 0.1 microns and 10 microns) or combined as conductive filler, and even different formulations in each category require different silver powders as conductive function materials.
Object: To achieve maximum utilization of silver conductivity and thermal conductivity with the least amount of silver powders in the established formulation or film forming process, to optimize the performance and cost of film properties.

General classification of Ultrafine Silver Powders in Electronic industry:

1. High – temperature sintered silver conductive paste with high sintering active silver powders
2. High – temperature sintered silver conductive paste with high dispersion silver powders
3. High conductivity reduction silver powders
4. Bright silver powders
5. Flake silver powders
6. Coarse silver powders

Application of Conductive Silver Pastes

1.The application in the electronics industry

For a variety of touch screen, film shape, electronic toys, computer keyboard, remote control and other electronic products, to play a part in conductive, thermal, shielding and so on.

2.Application in Solar Energy Industry

Solar conductive paste is one of the most important materials of solar energy, solar cells in addition to the most important material other than silicon, and solar energy conversion efficiency is closely related. (The solar cell back electrode and the front electrode are used silver paste)

Solar cell requirements for the slurry:
Forming a good ohmic contact, low contact resistance
Good wire conductivity
Strong adhesion strength
High aspect ratio
Wide sintering process window
Good chemical stability
There are suitable for large-scale production process
Low price
Solderability, solderability

Because of good performance of ultrafine silver powders used in conductive silver pastes, it’s a good choice in solar energy conductive pastes.

June 9, 2017

Silver nanopowder for antibacterial

Antibacterial mechanism of nano silver powder

Nano-silver particles can enter inside the micro-organisms, interrupt RNA replication to stop it’s reproduction , meanwhile it attached to the microbial cell wall, the impact of microbial organisms transmission finally cause the cell’s rupture and death.

Advantage of nano silver powder in antibacterial application

1) Disinfection and sterilization effect is good, lasting and have no drug resistance problem.

2) small amount at ppm level nano-silver antimicrobial products means lower cost.

3) without shortcoming of allergies and excessive deposition as traditional silver salt antibacterial agent do.

4) non-toxic to human safety, environmentally friendly.

Speak of nano silver powder, it’s like a far away high-technology topic, but speaking of specific, detailed antibacterial applications, we know nano silver particle can be part of our daily life.

Food

No doubt people consume food every day, and silver nano particle could take pat in our daily life in the way of antibacterial food container. Since nano silver have an inhibitory effect on the common food contamination bacteria (Gram-positive bacteria, Gram-negative bacteria, yeast, mold, etc.), it is applied to produce antibacterial food containers: nano silver food crisper, nano silver plastic wrap, antibacterial ceramic tableware, antibacterial refrigerator

Clothing

Nano silver’s antibacterial works as well as on fabrics, try search nano silver antibacterial socks on your online purchasing platforms, there surly comes out lot of results. In fact, some researchers does experiments and proves that nano silver particle function more than merely antibacterial part, also fabrics’’ anti-static and far infrared performance is also improved by nano silver finishing.

Living

Nano silver is also widely used in building materials: Nano silver antibacterial coatings, nano-silver antibacterial paint, etc., they are coated on the surface of the plate can kill the surface attached bacteria, and the antibacterial effect is lasting.

Medicine

No doubt that antibacterial work is more critical when it comes to the matter of health. And yes nowadays nano silver particle is maturely applied into medicines. For example: nano silver antibacterial dressings, nano silver antibacterial gel, nano silver antibacterial catheter, nano silver antibacterial equipment, nano silver bone cement, etc. I cannot list them all.

May 26, 2017

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

November 3, 2016

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.

October 28, 2016

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. “

October 28, 2016

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

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.

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.).

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.

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

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

Yttria stabilized zirconiapowder use as artificial gem materials, abrasive materials

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.