Pressureless sintering of fluorapatite under oxygen atmosphere

被引：47

作者：

Ben Ayed, F

Bouaziz, J

Bouzouita, K

机构：

[1] Ecole Natl Ingn Sfax, Lab Chim Ind, Equipe Mat Ceram, Sfax, Tunisia

[2] Inst Preparat Etud Ingn Monastir, Monastir, Tunisia

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 08期

关键词：

apatite; fluorapatite; grain growth; microstructure-final; porosity; sintering;

D O I：

10.1016/S0955-2219(99)00272-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Fluorapatite (Fap) is prepared by precipitation method and sintering in the temperature range 640-1365 degrees C. Linear shrinkage starts at about 715 degrees C and the material reaches its final density at 890 degrees C. Above this value, grain growth becomes important and induces an intragranular porosity which is responsible for density decrease. At 1180 degrees C, a liquid phase is formed as a result of the formation of a binary eutectic between Fap and fluorite contained in the powder as impurity. This liquid phase further promotes the coarsening process and induces formation of large pores at high temperatures. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1069 / 1076

页数：8

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