HOT ISOSTATIC PRESSING AND CHARACTERIZATION OF SOL-GEL-DERIVED CHROMIUM(III) OXIDE

被引：52
|
作者：
KAWABATA, A
YOSHINAKA, M
HIROTA, K
YAMAGUCHI, O
机构：
[1] Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Tanabe, Kyoto
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1995年 / 78卷 / 08期
关键词：
D O I：
10.1111/j.1151-2916.1995.tb08655.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：
Chromium(III) oxide (Cr2O3) crystallizes at low temperatures from an amorphous material prepared by adding hydrazine monohydrate to an aqueous solution of Cr(NO3)(3). 9H(2)O. Individual particles of Cr2O3 tend toward a hexago nal morphology above 800 degrees C. Well-densified Cr2O3 pellets (98.8% of theoretical density) have been fabricated by hot isostatic pressing for 2 h at 1100 degrees C and 196 MPa. Their fracture toughness is 4.4 MPa . m(1/2). The sample annealed in air for 12 h at 1300 degrees C exhibits a high electrical conductivity of 3.6 Ohm-1.m(-1) at 700 degrees C.
引用
收藏
页码：2271 / 2273
页数：3
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