• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Synthesis of potassium sodium niobate nanostructures by hydrothermal combining with the sol-gel method
【24h】

Synthesis of potassium sodium niobate nanostructures by hydrothermal combining with the sol-gel method

机译：水热结合溶胶-凝胶法合成铌酸钾钠纳米结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this paper the K_(1-x)Na_xNbO_3(KNN) nanostructures were synthesized by hydrothermal method using KNN gel powders as precursors. KNbO_3-type orthorhombic KNN nanowires and perovskite KNN microfin-gers with a morphotropic phase boundary (MPB) between rhombohedral and tetragonal characterized by X-ray diffraction and Raman spectroscopy were obtained at 190 ℃ and 220 ℃, respectively. KNbO_3-type orthorhombic KNN nanowires had rectangular shape and the growth direction of these nanowires was [001]. The rhombohedral-tetragonal KNN microfingers were metastable, and changed the rhombohedral-tetragonal phase into the orthorhombic phase via thermal treatment at 600 ℃ then cooled down to room temperature. Sodium dodecyl sulfate (SDS) as surfactant was added to the hydrothermal reaction. It was found that SDS could improve the crystallinity of the rhombohedral-tetragonal K_(0.52)Na_(0.48)NbO_3 and reduce the impurity effectively. The tetragonal-cubic phase transition temperature (7c) of the rhombohedral-tetragonal powders appeared at 555 ℃.
机译：本文以KNN凝胶粉为前驱体，通过水热法合成了K_（1-x）Na_xNbO_3（KNN）纳米结构。用X射线衍射和拉曼光谱分别表征了菱面体和四方晶相界（MPB）的KNbO_3型正交KNN纳米线和钙钛矿KNN微鳍。 KNbO_3型斜方KNN纳米线为矩形，这些纳米线的生长方向为[001]。菱面体-四方KNN微指为亚稳态，通过600℃热处理将菱面体-四方相转变为正交晶相，然后冷却至室温。将十二烷基硫酸钠（SDS）作为表面活性剂添加到水热反应中。发现SDS可以改善菱面体-四方K_（0.52）Na_（0.48）NbO_3的结晶度并有效地减少杂质。菱面体-四方粉末的四方立方相变温度（7c）出现在555℃。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第10期|1-6|共6页
  • 作者

    Xianghe Meng; Wen Wang; Hua Ke; Jiancun Rao; Yu Zhou;

  • 作者单位

    Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

    Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    KNN; Nanowires; MPB; Rhombohedral-tetragonal phase;

    机译：KNN;纳米线;MPB;菱面体-四方相;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号