Enhanced piezoelectric response of BaTiO3-KNbO3 composites
Enhanced piezoelectric response of BaTiO3-KNbO3 composites
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DOI：
10.1063/1.3662397
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发表时间：
2011-11-14
影响因子：
4
通讯作者：
Wada, Satoshi
中科院分区：
文献类型：
--
作者：
Fujii, Ichiro;Shimizu, Shigehito;Wada, Satoshi
研究了溶剂热法合成的具有不同界面的BaTiO3（BT）-KNbO3（KN）复合材料（BT/KN = 1）的压电响应。X射线衍射图显示两个不同的峰开始在BT的（200）和（002）四方形相关峰之间的2 θ位置处合并成单一宽峰。透射电子显微镜观察表明，BT单晶颗粒和沉积的KN晶体之间的异质外延界面区域。大场压电常数为136 pC/N，比烧结的0.5BT-0.5KN复合材料的大3倍。增强的压电响应归因于应变外延界面区域。(C)2011年美国物理学会。[doi：10.1063/1.3662397]
The piezoelectric response of solvothermally synthesized BaTiO3 (BT)-KNbO3 (KN) composites (the nominal BT/KN ratio was 1) with distinct interfaces was investigated. The x-ray diffraction pattern showed two distinct peaks began to merge into a singular broad peak at a two-theta position between (200) and (002) tetragonal-related peaks of BT. The transmission electron microscopy observation showed a heteroepitaxial interface region between BT single-crystal particles and deposited KN crystals. The large-field piezoelectric constant was 136 pC/N, which was three times larger than that of a sintered 0.5BT-0.5KN composite. The enhanced piezoelectric response was attributed to the strained epitaxial interface region. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3662397]