What is superhard material?

Overview of Boron Nitride

Boron nitride industrial powder is a pure white ceramic material with a hexagonal crystal structure similar to graphite. Boron nitride can withstand temperatures exceeding 2,000°C, and its dielectric strength is close to 1000 volts/mil depending on the grade. Boron nitride is very hot and pressed in the form of blanks, which can be easily processed into rods, bars, plates and even customized shapes.

Superhard materials mainly refer to diamond and cubic boron nitride. Diamond is the hardest material known in the world, including natural diamonds and synthetic diamonds. Natural diamond ore is mainly distributed in South Africa, Zaire and other countries. India and China have a small amount of placer. Synthetic diamonds are made by converting graphite into raw materials under high temperature and high pressure conditions of about 5 GPa and 1700 K. Graphite is used as raw material and catalytic metals such as nickel and cobalt are used as catalysts. Diamond has the characteristics of high hardness, wear resistance and good thermal stability. Cubic boron nitride (abbreviated as cBN) does not exist in nature and is man-made. After the success of synthetic diamonds, scientists use materials, equipment and techniques similar to synthetic diamonds to create a new material. Its hardness is second only to diamond, but it has higher thermal stability than diamond. Qualitative and chemical inertia of ferrous metals and their alloys.

The hardness of superhard materials is much higher than other materials (including corundum abrasives, silicon carbide, tool materials cemented carbide, high-speed steel, etc.), and has unparalleled excellent mechanical, thermal, optical, acoustic, electrical and mechanical properties and biological characteristics, Belongs to high efficiency, high precision and long life (semi-permanent). Energy-saving, green and environmentally friendly materials have won the praise of the "king of materials". They are extreme materials with a wide range of applications. They can not only process a variety of difficult-to-process materials, but also have the functions of high sensitivity, high precision, high power, high transmittance, high thermal conductivity, high electron transfer, high affinity, high wear resistance, and corrosion resistance. And radiation resistance.

Component development direction. It can not only solve the problem that emerging new materials cannot be processed with traditional tools (such as new multi-layer composite panels for tank bulletproof armor, new heat-resistant alloy parts for large aircraft, and key parts of aircraft). Large battleships, etc.), but you can also achieve twice the results with half the effort or unexpected results. The birth and development of the superhard material industry gave birth to some new industrial fields (such as stone, floor tiles, glass furniture and other manufacturing), and also improved the efficiency of certain traditional processing (such as optical lenses, such as cameras, cameras, telescopes) , Precision guided missile covers, etc.) hundreds of times. It has the characteristics of low consumption and waste discharge, and is irreplaceable in many application fields.

 The development trend of superhard materials industry

 1) With the continuous development of the world's industrial production technology, the era of the superhard material industry monopolized by a few countries (companies) in the world has passed, and the production layout is developing in the direction of multi-polarization. .

2) With the more and more extensive applications of superhard materials in various industrial fields, the overall demand for superhard materials in the market has steadily increased, and market prices have steadily decreased. The proportion of industrial diamonds used for processing non-metallic materials and construction materials will continue to increase.

3) According to the special requirements of various industrial application fields, product series and special product series have been formulated, and the specifications and varieties have been further improved.

4) Diamond tools characterized by precision, ultra-precision, high efficiency, long life and economic practicability are gradually forming a series. The research and standardization of diamond tools have developed rapidly. Some small diamond tools, such as diamond plating dressing tools for small diamond cutting pieces, have entered the family.

 5) High-tech products continue to emerge, and large single crystal particles and industrial nano-level ultra-fine powder products have begun to enter the market. Single crystal diamond tools made of single crystal large particles of synthetic diamond have been successfully applied in industry.

6) Significant progress has been made in low-pressure vapor deposition (CVD) technology. Diamond film has entered the market as a new structural and functional material. It fully demonstrates the broad prospects of new applications of synthetic diamonds.

7) Static pressing and diamond pressing are still the most important equipment for the production of superhard materials today. Different types of synthesis equipment have their own advantages. Large-scale punching machine is the inevitable trend of the development of superhard material industry.

8) Diamonds synthesized by dynamic methods have been industrialized, and new synthesis methods (such as liquid phase epitaxy, laser methods, etc.) will be widely concerned.

Application of Boron Nitride

1. Mold release agent for metal forming and lubricant for metal wire drawing.

2. Special electrolytic resistance materials under high temperature conditions.

3. High-temperature solid lubricants, extrusion anti-wear additives, additives used in the production of ceramic composites, refractory materials and antioxidant additives, especially in the case of molten metal corrosion resistance, heat-reinforcing additives, high-temperature insulating materials.

4. Heat-sealing desiccant for transistors and additives for polymers such as plastic resins.

5. Pressed into various shapes of boron nitride products, which can be used as parts for high temperature, high pressure, insulation and heat dissipation.

6. Aerospace thermal shielding materials.

7. With the participation of catalysts, it can be transformed into cubic boron nitride, which is as hard as diamond, after high temperature and high pressure treatment.

8. The structural materials of the atomic reactor.

9. Aircraft, rocket engine nozzles.

10. High voltage, high frequency electricity and plasma arc insulators.

11. Packaging materials to prevent neutron radiation.

12. The superhard materials processed by boron nitride are made into high-speed cutting tools and drill bits, which are used for geological prospecting and oil drilling.

13. Continuous cast steel isolation ring for metallurgy, amorphous iron launder, continuous cast aluminum release agent (various optical glass release agents)

14. Production of various evaporation boats, used for aluminum plating of capacitor films, aluminum plating of picture tubes, aluminum plating of displays, etc.

15. All kinds of fresh-keeping aluminum packaging bags, etc.

16. All kinds of laser anti-counterfeiting aluminum plating, brand hot stamping materials, all kinds of cigarette labels, beer labels, packaging boxes, cigarette packaging boxes, etc.

17. The fillers used in lipstick cosmetics are non-toxic, lubricious and shiny.

In terms of optical applications, due to the high hardness of the c-BN film and the high transmittance of the entire wavelength range from ultraviolet (about 200 nm) to far infrared, it is suitable for use as a surface coating for certain optical components, and is particularly suitable for use as Coating of window materials such as zinc selenide (ZnSe) and zinc sulfide (ZnS). In addition, it has good thermal shock resistance and hardness, and is expected to be an ideal window material detector for high-power lasers and high-power lasers.

Boron Nitride Price

The price of boron nitride will vary randomly with production costs, transportation costs, international conditions and market supply and demand of boron nitride. Tanki New Materials Co. Ltd aims to help all industries and chemical wholesalers find high-quality products by providing a full range of products. Tailor-made services, low-priced nanomaterials and chemicals. If you are looking for boron nitride, please feel free to send an inquiry to get the latest price of boron nitride.

Suppliers of Boron Nitride

As a global boron nitride supplier, Tanki New Materials Co. Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (titanium nitride, silicon nitride, titanium nitride, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.