Synthesis and Oxidation Behavior of MgAlON Prepared from Different Starting Materials

Abstract

The formation and oxidation of magnesium–aluminum oxynitride (MgAlON) were investigated with emphasis on the effect of impurities through using synthetic raw materials and natural raw materials. It was observed that the formation of MgAlON was not much influenced by the starting materials, but MgAlON prepared from the natural starting materials exhibited accelerated oxidation. The different oxidation behaviors of MgAlON prepared from the different raw materials were discussed from the viewpoint of impurities in the materials. The formation temperature and oxidation temperature of MgAlON produced in this work were compared with those of MgAlON prepared using other processes.

The phase evolution of resin‐bonded Al2O3‐Al refractory containing magnesia under N2‐blowing

“…MgAlON is regarded as MgO/MgAl 2 O 4 stabled AlON 8–10 . MgAlON can be obtained from Al 2 O 3 /Al, MgO/MgAl 2 O 4 and AlN/N 2 under low oxygen pressure 11–14 …”

“…[8][9][10] MgAlON can be obtained from Al 2 O 3 /Al, MgO/MgAl 2 O 4 and AlN/N 2 under low oxygen pressure. [11][12][13][14] The synthesis of MgAlON transparent ceramics requires high temperature, and it is generally believed that it is obtained by the solid solution reaction of AlON with MgO/MgAl 2 O 4 . [15][16][17] When MgAlON is used as a refractory composite phase, the synthesis temperature is relatively low.…”