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钙钛矿型锰氧化物La1-x-yCaxKyMnO3系列样品的介电性质
  • ISSN号：0251-0790
  • 期刊名称：《高等学校化学学报》
  • 时间：0
  • 分类：O614[理学—无机化学;理学—化学]
  • 作者机构：[1]吉林大学无机合成与制备化学国家重点实验室,化学学院,长春130012
  • 相关基金：国家自然科学基金（批准号：20631010 90922034）资助
作者： 杨铭[1], 黄科科[1], 侯长民[1], 刘宪瑞[1], 胡滨[1], 袁宏明[1], 冯守华[1]
关键词： 钙钛矿, 介电常数, A位离子失配度, Perovskite, Dielectric constant, A-site cation size mismatch
中文摘要：

采用水热氧化还原法制备了La1-x-yCaxKyMnO3系列样品,这些样品均具有ABO3型钙钛矿结构,并且在A位同时拥有La3＋,Ca2＋和K＋3种不同价态的阳离子.将La1-x-yCaxKyMnO3系列样品研磨压片,经烧结制成平行板电容器,在室温条件下测试了样品的电容、介电损耗和电阻随频率的变化.结合样品组成引起的A位离子失配度的变化,给出了La1-x-yCaxKyMnO3系列样品介电常数（实部）随A位离子变化的规律;对比样品电阻随频率变化的理论值和计算值说明了样品的内部属于电阻电容并联电路.

英文摘要：

A series of perovskite manganese oxides La1-x-yCaxKyMnO3 was synthesized from hydrothermal redox reaction.In these compounds,three kinds of cations with different valences La3＋,Ca2＋ and K＋,occupied at A site.The obtained samples were ground and pressed in discs,which were then sintered to form a parallel-plate capacitor.At room temperature,the capacitance,the loss tangent and the resistance were mea-sured as a function of frequency.The real part of the complex relative dielectric permittivity varies considerably with the A-site cation size mismatch in different samples.The comparison of the resistance derived from experiment and calculation respectively indicates the CP｜ ｜RP equivalent circuit in intrinsic samples.

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期刊信息
  • 《高等学校化学学报》
  • 北大核心期刊（2011版）
  • 主管单位:中华人民共和国教育部
  • 主办单位:吉林大学 南开大学
  • 主编：周其凤
  • 地址：吉林大学南胡校区
  • 邮编：130012
  • 邮箱：cjcu@jlu.edu.cn
  • 电话：0431-88499216
  • 国际标准刊号：ISSN：0251-0790
  • 国内统一刊号：ISSN：22-1131/O6
  • 邮发代号:12-40
  • 获奖情况:
  • 首届及第二届国家期刊奖,连续两届“百种中国杰出学术期刊”,中国期刊方阵“双高”期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国科学引文索引（扩展库）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,英国英国皇家化学学会文摘,中国北大核心期刊（2000版）
  • 被引量:50676