Sintering and microstructure of rare earth phosphate ceramics REPO4 with RE = La, Ce or Y

被引：65

作者：

Bregiroux, D

Lucas, S

Champion, E

Audubert, F

Bernache-Assollant, D

机构：

[1] Univ Limoges, Sci Procedes Ceram & Traitements Surface, UMR 6638, CNRS, F-87060 Limoges, France

[2] CEA Cadarache, SPUA, DEC, DEN,LTEC, F-13108 St Paul Les Durance, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2006年 / 26卷 / 03期

关键词：

rare earth phosphates; sintering; grain growth; microstructure-final; phosphates;

D O I：

10.1016/j.jeurceramsoc.2004.11.004

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：

Sintering of rare earth phosphates REPO4 (RE= La, Cc or Y) was Studied using dilatometry. The presence of a secondary rare earth metaphosphate phase RE(PO3)(3) as sintering aid was investigated. It proved to accelerate the densification but it activated fast grain growth, which was very detrimental to the microstructural design of processed ceramics. A temperature of 1400-1450 degrees C was required to sinter pure LaPO4 and CePO4 ceramics with fine grains. Both compounds behave similar while YPO4 did not densify even at 1500 degrees C. The influence of specific surface area of starting powders, temperature and holding time on the sintering rate and microstructures of dense REPO4 materials is also reported. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：279 / 287

页数：9

共 33 条

[1]

Abraham M. M., 1980, Radioactive Waste Management, V1, P181

[2] Sintering of calcium phosphate hydroxyapatite Ca10(PO4)6(OH)2 -: I.: Calcination and particle growth [J].