Why Is Boron Nitride Called 'White Diamond'?

Boron nitride (BN) ceramics were first discovered in 1842, but it was not until 1955, after the end of World War II, when scientists solved its hot pressing method, that they formally began to research and apply boron nitride.

On the foreign side, the U.S. Diamond Corporation and United Carbon Corporation were the first to put into the production of boron nitride, and by 1960, their production had exceeded 10 tons. Subsequently, Japan began to import large quantities of U.S. boron nitride products and succeeded in trial production in early 1969 and began commercial production in 1970.

Domestically, China began research on boron nitride powder in 1963, and finally developed it successfully in 1966 and put it into production in 1967. Since then, boron nitride has been used in China's industrial and boron nitride ceramics multifunctional physical and chemical properties

(1) Thermal properties: boron nitride products can be used in an oxidizing atmosphere at about 1000°C and in an inert atmosphere at nearly 3000°C. The boron nitride products can be used in an oxidizing atmosphere at about 1000°C and in an inert atmosphere at nearly 3000°C. This property than mullite, alumina and silicon carbide refractory refractory materials. At the same time, the thermal shock resistance is large, in the 1500 ℃ of the rapid cooling and heating environment will not produce rupture.

(2) chemical stability: with the vast majority of metals such as solution iron, aluminum, copper, silicon, potassium arsenide, brass and cryolite, etc. do not play a role, slag glass is also the same, so boron nitride materials made of containers can be used as a vessel for the above substances. But generally contains B2O3 with hygroscopicity, which makes the product use in the process of rapid heating will be sucked into the water seep out, and then produce cracks, improve this shortcoming of one of the effective measures can be mixed with some binding agent.

(3) electrical properties: due to the BN products dielectric constant and dielectric loss are small, can be widely used in high-frequency range and low-frequency range. Its dielectric strength is 4.5 times that of alumina, dielectric constant is one-half of alumina, electrical properties with graphite is a big difference, with oxide ceramics at high temperatures as non-conductive, is an electrical insulating material can be used in a wide range of temperatures.

(4) machining performance: boron nitride has a Mohs hardness of two, can be processed in the lathe, milling machine and other processing equipment. It can also be processed into thin slices, spirals and a variety of complex shape parts. Although superior to graphite at room temperature, but the mechanical strength of boron nitride is relatively low, more brittle than oxide ceramics.

(5) Lubricity: Boron nitride powder is a white flake-like micro-fine material, commonly known as "white graphite". Similar to graphite, boron nitride has good lubricating properties, can be used as high-temperature lubricating materials, especially for high-temperature friction and wear environment.

(6) Lightweight: Boron nitride is a relatively lightweight material among ceramic materials, with a low density. This makes it ideal in scenarios where a lower weight burden is required, such as in aerospace.

(7) Properties for Neutron Absorption: Boron nitride has a large neutron absorption cross-section and therefore has significant potential for applications in nuclear energy. It can be used to make neutron-absorbing materials for controlling neutron flow during nuclear fission reactions to ensure safety.

Boron nitride is a unique and versatile ceramic material known as the "white diamond". Its development history has gone through a long period of research and application, and it plays an important role in industrial and cutting-edge technology fields from abroad to domestic.

Boron nitride has a number of excellent properties including excellent thermal properties, chemical stability, electrical properties, machinability, lubricity, light weight and neutron absorption. This has led to a wide range of applications for boron nitride in refractory materials, electrical insulating materials, high-temperature lubricating materials, lightweight structural materials, and nuclear energy. It plays an important role in the field of cutting-edge technology.

Shengyang New Material Co., Ltd. is committed to the production of boron nitride and boron nitride processed products, and can customize various boron nitride insulating ceramic parts according to customer needs. Contact us if necessary.
Tel:+8618560961205
Email:sales@zbsyxc.com
WhatsApp:+8613964302243