Fabrication of zero-thermal-expansion ZrSiO4/Y2W3O12 sintered body

被引：35

作者：

Yanase, I. ^{[1
]}

Miyagi, M. ^{[1
]}

Kobayashi, H. ^{[1
]}

机构：

[1] Saitama Univ, Fac Engn, Dept Appl Chem, Saitama 3388570, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 15期

关键词：

Composites; Thermal expansion; Yttrium tungstate; Zircon; TMA; GLASS-CERAMICS; COMPOSITES;

D O I：

10.1016/j.jeurceramsoc.2009.06.001

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：

We focused on the linear negative thermal expansion of Y2W3O12 in a wide-temperature range and on the chemical stability of ZrSiO4 in the fabrication of the composite material ZrSiO4/Y2W3O12 with a zero-thermal-expansion. The compact composed of Y2W3O12 and ZrSiO4 had a thermal shrinkage rate smaller than that of Y2W3O12 and higher than that of ZrSiO4. SEM-EDX observation clarified that the ZrSiO4/Y2W3O12 sintered body fabricated at 1400 degrees C for 10 h had a microstructure composed of ZrSiO4 and Y2W3O12 grains, and XRD indicated that only ZrSiO4 and Y2W3O12 phases existed in the sintered body. The relative density of the ZrSiO4/Y2W3O12 sintered body reached 92%, which was larger than that of the ZrSiO4 sintered body because Y2W3O12 grains could be sintered at lower temperatures. The average linear thermal expansion coefficients of the ZrSiO4/Y2W3O12 sintered body were -0.4 x 10(-6) and -0.08 x 10(-6)degrees C-1 in the temperature ranges from 25 to 500 degrees C and from 25 to 1000 degrees C, respectively, which showed an almost zero-thermal-expansion. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3129 / 3134

页数：6

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