GROWTH OF MONOCLINIC ZRO2 THIN, FLAKY CRYSTALS BY HYDROTHERMAL DECOMPOSITION OF ZIRCONIUM-OXIDE SULFATE CRYSTALS

被引:10
作者
KATO, E
HIRANO, M
NAGAI, A
机构
[1] Department of Applied Chemistry, Aichi Institute of Technology, Toyota, 470-03, Yachigusa, Yakusa
关键词
D O I
10.1111/j.1151-2916.1995.tb08652.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
Thin platelike hexagonal crystals of zirconium oxide sulfate (ZOS) with a chemical composition of Zr3O5SO4 . nH(2)O were previously synthesized by the hydrolysis of an aqueous solution of 2 mol/L ZrOSO4 at 240 degrees C. The ZOS particles obtained were hydrothermally treated again in dilute sulfuric acid solution (<0.15 mol/L) at 240 degrees C.The decomposition of ZOS and the nucleation and growth morphology of the monoclinic ZrO2 crystals were automatically controlled with increasing sulfuric acid released by the decomposition of ZOS, and were influenced by the morphology of ZOS as precursors. Anisotropic monoclinic ZrO2 single crystals, elongated thin and flaky particles (length: >2 mu m; width: about 0.1 mu m; thickness:<<0.01 mu m), could be obtained under some conditions without the coexistence of another type of anisotropic ZrO2 fibrous twin crystal.
引用
收藏
页码:2259 / 2262
页数:4
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