A NEW METHOD FOR FABRICATION OF DENSE ALUMINUM NITRIDE BODIES AT TEMPERATURES AS LOW AS 1600-DEGREES-C

被引：35

作者：

JARRIGE, J ^{[1
]}

BOUZOUITA, K ^{[1
]}

DORADOUX, C ^{[1
]}

BILLY, M ^{[1
]}

机构：

[1] ECOLE NATL INGENIEURS,DEPT CHIM,SFAX,TUNISIA

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1993年 / 12卷 / 04期

关键词：

D O I：

10.1016/0955-2219(93)90103-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The sintering behaviour of aluminium nitride in the presence of yttrium oxide associated with calcium aluminate (12CaO. 7Al(2)O(3)) or calcium yttrium aluminate (CaYAlO4) was studied in this work. The use of these compositions as. additives permits significant lowering of the sintering temperature. Ir leads to dense bodies at temperatures less than 1600 degrees C. The aluminate phases result in the formation of a liquid phase at low temperatures but the composition of this liquid evolves rapidly fo move refractory phases in the presence of alumina contained in the AlN powder. The yttrium oxide retards the change of the liquid composition by increasing the liquid viscosity and displacing its composition to calcium yttrium aluminate phases. 97% of the theoretical density can be obtained by sintering AlN at 1600 degrees C for 30 min with 2 wt% as total content additive. The secondary phases formed are the refractory aluminates CaO. 2Al(2)O(3), CaO. AI(2)O(3) and CaYAl3O7.

引用

页码：279 / 285

页数：7

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