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首页> 外文期刊>Japanese journal of applied physics >Nanostructure Control of Barium Titanate-Potassium Niobate Nanocomplex Ceramics and Their Enhanced Ferroelectric Properties
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Nanostructure Control of Barium Titanate-Potassium Niobate Nanocomplex Ceramics and Their Enhanced Ferroelectric Properties

机译：钛酸钡-铌酸钾纳米复合陶瓷的纳米结构控制及其增强的铁电性能

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摘要

Barium titanate (BaTiO_3,BT)-potassium niobate (KNbO_3,KN) nanocomplex ceramics with various KN/BT molar ratios were prepared by a solvothermal method. From a transmission electron microscopy (TEM) observation, it was confirmed that the KN layer thickness on BT particles was controlled from 5 to 40 nm by controlling KN/BT molar ratios. Their dielectric constants were measured at room temperature and 1 MHz, and the maximum dielectric constant of 370 was measured for the BT-KN nanocomplex ceramics with a KN thickness of 22 nm. TEM observation revealed that at a KN thickness below 22 nm, the BT/KN heteroepitaxial interface was assigned as a strained interface, while at 40 nm, the interface was assigned as a relaxed one. These results suggested that the strained heteroepitaxial interface could be responsible for the enhanced dielectric properties.
机译：通过溶剂热法制备了各种KN / BT摩尔比的钛酸钡（BaTiO_3，BT）-铌酸钾（KNbO_3，KN）纳米复合陶瓷。从透射电子显微镜（TEM）观察，证实通过控制KN / BT摩尔比，将BT颗粒上的KN层厚度控制在5至40nm。它们的介电常数是在室温和1 MHz下测量的，而KN厚度为22 nm的BT-KN纳米复合陶瓷的最大介电常数是370。 TEM观察表明，在KN厚度低于22 nm时，BT / KN异质外延界面被指定为应变界面，而在40 nm时，该界面被指定为松弛界面。这些结果表明应变异质外延界面可能是介电性能增强的原因。

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  • 来源
    《Japanese journal of applied physics》 |2012年第9issue2期|p.09LC05.1-09LC05.5|共5页
  • 作者

    Satoshi Wada; Kenta Yamashita; Ichiro Fujii; Kouichi Nakashima; Nobuhiro Kumada; Chikako Moriyoshi; Yoshihiro Kuroiwa; Yoshinori Fujikawa; Daisuke Tanaka; Masahito Furukawa;

  • 作者单位

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan;

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan;

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan;

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan;

    Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan;

    Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan;

    Department of Physical Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan;

    Materials and Process Development Center, TDK Co., Ltd., Narita, Chiba 286-8588, Japan;

    Materials and Process Development Center, TDK Co., Ltd., Narita, Chiba 286-8588, Japan;

    Materials and Process Development Center, TDK Co., Ltd., Narita, Chiba 286-8588, Japan;

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