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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.