Sintering mechanisms in aluminum nitride with Y or Ca-containing additive

被引：33

作者：

Molisani, A. L. ^{[1
]}

Yoshimura, H. N. ^{[2
]}

Goldenstein, H. ^{[1
]}

机构：

[1] Univ Sao Paulo, Polytech Sch, BR-05508900 Sao Paulo, Brazil

[2] Inst Technol Res State Sao Paulo, BR-05508901 Sao Paulo, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2009年 / 20卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

THERMAL-CONDUCTIVITY; ALN CERAMICS; MICROSTRUCTURAL DEVELOPMENT; POWDER; DENSIFICATION; KINETICS; BEHAVIOR; CACO3; AIN; YTTRIA;

D O I：

10.1007/s10854-008-9737-7

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

AlN with 4 wt.% Y(2)O(3) or CaO were prepared by sintering in dilatometer and conventional furnace up to 1850 A degrees C. The aim of this work was to compare the sintering behavior and mechanisms related with the densification of AlN with Y or Ca-containing additives. The sample with Y(2)O(3) approached 33% of total densification by solid-state sintering process preceding the liquid phase formation, which was near 1700 A degrees C. After the formation of liquid an overheating of only 50 A degrees C was needed for this sample to achieve full density. The sample with CaO formed liquid-phase near 1400 A degrees C, but required a higher overheating (> 300 A degrees C) in order to achieve full density. The densification of the sample with CaO was retarded by: (i) high viscosity of the liquid-phase formed below 1600 A degrees C; (ii) formation of large pores; and (iii) gas entrapped inside the pores.

引用

页码：1 / 8

页数：8

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