Fabrication and Piezoelectric Properties of Grain-Oriented (Bi1/2K1/2)TiO3-BaTiO3 Ceramics

被引:32
作者
Nemoto, Masahiro [1 ]
Hiruma, Yuji [1 ]
Nagata, Hajime [1 ]
Takenaka, Tadashi [1 ]
机构
[1] Tokyo Univ Sci, Fac Sci & Technol, Dept Elect Engn, Chiba 2788510, Japan
关键词
lead-free; bismuth potassium titanate; piezoelectric properties; dielectric properties; reactive templated grain growth; grain orientation;
D O I
10.1143/JJAP.47.3829
中图分类号
O59 [应用物理学];
学科分类号
摘要
The piezoelectric properties of (1-x)(Bi1/2K1/2)TiO3-BaTiO3 (x = 0.1) [abbreviated as BKT-BT10] ceramics prepared by ordinary solid-state reaction and reactive templated grain growth (RTGG) using platelike Bi4Ti3O12 particles as a template were investigated. All samples showed a single-phase perovskite structure, and relative densities compared with theoretical densities were all higher than 95%. The degree of orientation F was determined by the Lotgering method using an X-ray diffraction (XRD) pattern. The F values of textured BKT-BT10 ceramics were relatively low at similar to 35%. However, field-induced strains and piezoelectric properties of BKT-BT10 ceramics were improved by grain orientation. In particular, the piezoelectric strain constant d(33) and the strain of textured BKT-BT10 ceramics in a direction parallel (//) to the tape stacking direction were 84.5 pC/N and 168 pm/V (at 80 kV/cm), respectively.
引用
收藏
页码:3829 / 3832
页数:4
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