Barium zirconate ceramic powder synthesis by the coprecipitation-calcination technique

被引:32
作者
Brzezinska-Miecznik, J [1 ]
Haberko, K [1 ]
Bucko, MM [1 ]
机构
[1] Univ Min & Met Krakow, Fac Mat Sci & Ceram, Dept Special Ceram, PL-30059 Krakow, Poland
关键词
barium zirconate; synthesis; coprecipitation-calcination technique;
D O I
10.1016/S0167-577X(02)00454-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The coprecipitation technique was used to prepare an intimate mixture of barium carbonate and hydrous zirconia gel. A part of barium ions became incorporated in the zirconia gel structure. Heat treatment of the system results in the crystallisation of the BaO in ZrO2 solid solution of tetragonal symmetry. The solid solution, when heated without contact with BaCO3, decomposes at elevated temperatures. It results in the formation of BaZrO3 and monoclinic zirconia solid solution. No solid solution of monoclinic symmetry appears when barium carbonate is present in the system. In this case, the reaction of the tetragonal solid solution with BaCO3 leads to the synthesis of BaZrO3. The highest sintering ability is observed in the powder, a small part of which remains unreacted. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:273 / 278
页数:6
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