nitrure de bore

Domaine: chimiechimie minérale
Date: 1983

Définition :

Poudre blanche, volumineuse, d'aspect amorphe.

Note :

Emplois : substance réfractaire (revêtement de fours); isolant électrique; redresseurs de courant.

Termes :

nitrure de bore n. m.
BN

Traductions

anglais
Date : 1983
Définition

An unusual compound (BN) having a graphite-like plate structure; it is a powder of extremely small particle size (1 micron), with a very high melting point 2980 °C (5400 °F), and superior electrical resistance. Under a compression load of a million pounds per square inch, it can be made as hard as diamond. Its uses are as a furnace-lining refractory, laboratory ware (crucibles), aerospace shielding, plasma technology, dielectric materials, high-strength filaments, and solid lubricant. It is also being used for high-strength, heat-resistant fibers. It is made in an electric furnace from a blend of boric acid and tricalcium phosphate in an ammonia atmosphere.

Terme :
1. boron nitride