Preparation and characterisation of the Ba(Zr,Ti)O3 ceramics with relaxor properties

被引:70
作者
Ciomaga, Cristina
Viviani, Massimo
Buscaglia, Maria Teresa
Buscaglia, Vincenzo
Mitoseriu, Lillana
Stancu, Alexandru
Nanni, Paolo
机构
[1] Alexandru Ioan Cuza Univ, Dept Solid State & Theoret Phys, Iasi 700506, Romania
[2] CNR, Inst Energet & Interphases, I-16149 Genoa, Italy
[3] Univ Genoa, Dept Chem & Proc Engn, I-16129 Genoa, Italy
关键词
ferroelectric properties; BaTiO3 and titanates;
D O I
10.1016/J.jeurceramsoc.2007.02.095
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
Ba(Zr-x Ti1-x)O-3 ceramics with x = 0. 10, 0. 15 and 0. 18 were prepared via solid state reaction. For the composition x = 0. 10, ceramics with various Min sizes in the range 0.75-3.20 mu m were obtained by sintering at various temperatures 1350-1500 degrees C. High permittivity (above 14,000 at the transition temperature) and losses smaller than 7% for temperatures below 120 degrees C, together with a shift of the Curie temperature towards lower values with increasing x. are characteristic to these ceramics. A ferroelectric-relaxor crossover takes place when x increases, with intermediate character for all the compositions. For the composition x = 0. 10, the relaxor state is favoured by reducing the grain size. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4061 / 4064
页数:4
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