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熔融碱法制备三重价态钙钛矿锰氧化物
  • ISSN号：0251-0790
  • 期刊名称：《高等学校化学学报》
  • 时间：0
  • 分类：O611.4[理学—无机化学;理学—化学]
  • 作者机构：[1]无机合成与制备化学国家重点实验室,吉林大学化学学院,长春130012
  • 相关基金：国家自然科学基金（批准号：90922034和21131002）; 高等学校博士学科点专项科研基金（批准号：20110061130005）资助
作者： 李明[1], 黄科科[1], 初学峰[1], 杜燕燕[1], 葛磊[1], 孙宇[1], 侯长民[1], 冯守华[1]
关键词： 熔融碱法, 混合价态, 钙钛矿, 掺杂锰酸盐, Molten hydroxide, Mixed valence, Perovskite, Doped manganite
中文摘要：

以MnO2,Ca（OH）2和La（OH）3为反应原料,在惰性气氛、低温（500℃）熔融KOH体系中合成了具有菱形钙钛矿结构Ca,K共掺杂的La0.64Ca0.25K0.11MnO3纳米材料,并对Mn的价态及磁学性能等进行了讨论.X射线光电子能谱（XPS）分析结果表明,La0.64Ca0.25K0.11MnO3纳米材料中的Mn具有三重混合价态,其零场冷却低温磁化率曲线表现出顺磁-铁磁转变,居里温度（Tc）为280 K.

英文摘要：

Ca-K codoped La0.64Ca0.25K0.11MnO3 nanocrystals with rhombohedral structure were synthesized in a molten KOH system at temperature as low as 500 ℃ in the atmosphere of Ar.The starting materials were MnO2,Ca（OH）2 and La（OH）3.Mn oxidation state and magnetic properties of La0.64Ca0.25K0.11MnO3 were discussed.XPS results demonstrate that there is a mixed valence of Mn in the nanocrystal.The zero-field-cooled（ZFC） curve indicates the samples undergo a paramagnetic（PM） to ferromagnetic（FM） phase transition and the Curie temperature（Tc） is 280 K.

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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