Which boat is right for your coating material?
Which boat type fits which coating material? You can find an overview of our evaporation boats and coating materials here. Of course, we are also happy to help you individually with your material choice.
Boron Nitride Ceramics are advanced synthetic ceramic materials available in solid and powder form. Its unique properties – from high heat capacity and outstanding thermal conductivity to easy machinability, lubricity, low dielectric constant and superior dielectric strength – make boron nitride a truly outstanding material.
In its solid form, Hexagonal Boron Nitride is often referred to as “white graphite” because it has a microstructure similar to that of graphite. However, unlike graphite, boron nitride is an excellent electrical insulator that has a higher oxidation temperature. It offers high thermal conductivity and good thermal shock resistance and can be easily machined to close tolerances in virtually any shape. After machining, it is ready for use without additional heat treating or firing operations.
To make solid shapes, Hexagonal Boron Nitride Powders and binders are hot-pressed in billets up to 490mm x 490mm x 410mm at pressures up to 2000 psi and temperatures up to 2000°C. This process forms a material that is dense and easily machined and ready to use. It is available in virtually any custom shape that can be machined and has unique characteristics and physical properties which make it valuable for solving tough problems in a wide range of industrial applications.
Boron Nitride Coating is one of the few materials that offers electrical insulation and high thermal conductivity. This makes BN extremely useful in high power electronic applications in heat sink and heat spreader applications. Other materials that are commonly used are Aluminum Nitride, beryllium oxide, and sometimes Alumina – however, all of these materials are significantly more difficult to machine into intricate shapes.
Why is Cubic Boron Nitride called a superhard material? If you are looking for the answer to this question, then you've come to the right place. In this article, we will take a closer look at the cubic boron nitride and try to answer why cubic boron nitride is called a superhard material.
Cubic boron nitride (CBN) is a super hard material synthesized by hexagonal boron nitride and catalyst under high temperature and pressure. The hardness of this superhard material is second only to diamond in industrial application. The thermal stability of Cubic Boron Nitride Powder is much higher than that of diamond, and it has greater chemical stability for iron series metal elements. Therefore, the cubic boron nitride grinding tool has been widely used in the cutting and grinding fields of iron fund products with excellent performance.
There are two kinds of cubic boron nitride: single crystal and polycrystalline sintered body. The single crystal is obtained by controlling the hexagonal boron nitride and catalyst in pressure in 3000 ~ 8000 Mpa and the temperature in 800 ~ 1900 ℃. Typical catalyst materials are selected from alkali metals, alkali earth metals, tin, lead, antimony, and their nitrides. The crystalline form of cubic boron nitride has the truncated cone of tetrahedron, octahedron, skew crystal and twin crystal, etc. Commercially produced cubic boron nitride is black, amber, and gold-plated with particles usually less than 1 mm in size.
Application of Boron Nitride Polycrystal in Metal Cutting Field
Cubic Boron Nitride Cutting Tools are a kind of superhard material product that are formed by the coalescence of many fine grains (0.1~100 micron) CBN. In addition to high hardness and abrasion resistance, it also has the characteristics of high toughness, chemical inertness, red hardness, etc., and can be polished with the cutting edge of the diamond grinding wheel. It shows excellent cutting performance in all aspects of machining and can achieve stable cutting at high temperatures, so it is especially suitable for machining all kinds of hardened steel, tool steel, chilled cast iron, and other hard-working materials with high hardness.
PCBN has most of the properties of CBN, and overcomes the disadvantages of directional cleavage of CBN single crystal surface, and has many performance advantages.
>https://www.syindustrialceramics.com/cubic-boron-nitride/cubic-boron-nitride-powder/
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