According to the difference of raw materials and processing technology, graphite is divided into natural graphite and artificial graphite. Because of its low lithium potential, high initial efficiency, good cycle stability and low cost, graphite has becom

Si3N4 has two kinds of crystal structure: α-Si3N4 is granular crystal and β-Si3N4 is needle crystal.

Zinc oxide is an oxide of zinc. Insoluble in water, soluble in acids and strong bases.

Optical coating refers to the process of plating one (or more) metal (or dielectric) film on the surface of optical parts.

Boron nitride is a crystal composed of nitrogen atoms and boron atoms.

Silicon nitride was discovered in the middle of the 19th century, but it is not easy to make because of its covalent bond.

Alumina is an insoluble compound of aluminum and does not produce acute toxic reactions.

Gallium nitride is a kind of binary III/V direct band gap semiconductor, which is very suitable for high power transistors which can work at high temperature.

Silicon carbide is a very hard crystalline compound made of silicon and carbon. Silicon carbide chemical formula is SiC.

Hafnium carbide HfC is a gray-black powder with a face-centered cubic structure and a very high melting point of 3890℃.