The category of refractory materials includes materials with high resistance to high temperatures, the ability to operate at elevated temperatures.
This category includes materials:
Boron nitride BN (pyrolytic and technical) with operating temperatures up to 2100 C in vacuum and inert environment and 1000 C in oxygen environment;
Aluminum oxide Al2O3 with operating temperature up to 1600 C;
Silicon nitride Si3N4 with operating temperature up to 1400 C.
Tables with characteristics are placed in the corresponding sections of the materials.