Study on the Reductive Spinel—A New Spinel Formula AlN–Al2O3 instead of the Previous One Al3O4

Abstract

A compound between aluminum oxide and aluminum nitride can be produced in a reductive atmosphere above 1650°C.A new spinel formula AlN–Al2O3 should be adopted instead of the previous one Al2O–5Al2O3 or Al3O4.The physical constants of AlN-Al2O3 are as follows: crystal structure Fd3m, Z=8, a=7.940 Å; density 3.78g./cc.; dielectric constant 23.8; refractive index 1.80; magnetic susceptibility −0.34×10−6/g