Highly anisotropic single crystal-like La2Ti2O7 ceramic produced by combined magnetic field alignment and templated grain growth
Highly anisotropic single crystal-like La2Ti2O7 ceramic produced by combined magnetic field alignment and templated grain growth
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DOI：
10.1016/j.jeurceramsoc.2014.12.003
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发表时间：
2015-06
影响因子：
5.7
通讯作者：
Zhipeng Gao;Tohru S. Suzuki;S. Grasso;Y. Sakka;M. Reece
中科院分区：
文献类型：
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作者：
Zhipeng Gao;Tohru S. Suzuki;S. Grasso;Y. Sakka;M. Reece
利用种子晶体和注浆过程中磁场取向相结合的二维有效取向方法，成功地制备了具有高各向异性的La2Ti2O7单晶陶瓷。结果表明，LTO的[0，01]方向磁化率最高。计算得到织构陶瓷三个方向的取向因子分别为0.76、0.71和0.73。织构陶瓷的介电和铁电性能均为类单晶。取向陶瓷在不同方向的介电常数比单晶的介电常数高，这是由于磁畴壁和晶界的贡献所致。
Highly anisotropic single crystal-like ceramic of La2Ti2O7was successfully prepared by an effective 2-D grain alignment using both seed crystals and magnetic field alignment during slip casting followed by templated grain growth (TGG). It was found that the highest magnetic susceptibility is in the [0 0l] direction of LTO. The grain orientation factors of the three directions for the textured ceramic were calculated as 0.76, 0.71, and 0.73, respectively. The dielectric and ferroelectric properties of the textured ceramic were found to be single crystal like. The dielectric permittivity of the aligned ceramic in the different directions is higher than for single crystal due to contributions from domain walls and grain boundaries.