高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (1): 40.doi: 10.7503/cjcu20120303

• 研究论文: 无机化学 • 上一篇    下一篇

La1-x-y CaxKy MnO3的可控合成及表征

初学峰, 黄科科, 侯长民, 葛磊, 吴小峰, 杜燕燕, 冯守华   

  1. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2012-04-05 发布日期:2012-12-31
  • 通讯作者: 冯守华,男,博士,教授,博士生导师,中国科学院院士,主要从事无机固体材料研究.E-mail:shfeng@mail.jlu.edu.cn E-mail:shfeng@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 90922034, 21131002)和高等学校博士学科点专项科研基金(批准号: 20110061130005)资助.

Controlled Synthesis and Properties of La1-x-y CaxKy MnO3

CHU Xue-Feng, HUANG Ke-Ke, HOU Chang-Min, GE Lei, WU Xiao-Feng, DU Yan-Yan   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2012-04-05 Published:2012-12-31
  • Contact: O611 E-mail:shfeng@mail.jlu.edu.cn

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摘要：

采用水热合成方法, 通过调控反应物中Ca2+与La3+的摩尔比可控合成了钙钛矿结构La1-x-yCaxKyMnO3(0.05≤x≤0.49; 0.05≤y≤0.21)系列样品, 利用X射线衍射仪、 扫描电子显微镜、 等离子光谱仪及磁性测量系统对样品的结构、 形貌、 成分组成和磁学性质进行了研究. 结果表明, 该水热反应过程为歧化反应, K+离子的引入导致了样品中双铁磁相的出现.

关键词: 水热合成, 歧化反应, 三重价态, 双铁磁相

Abstract:

Perovskite La1-x-y CaxKy MnO3(0.05≤x≤0.49; 0.05≤y≤0.21) crystals have been hydrothermally synthesized through controlling the molar ratio of Ca2+ to La3+ of the reactant solution. The structures, morphologies, compositions and magnetic properties of the crystals were studied by X-ray diffractometer(XRD), inductively coupled plasma(ICP) analyzer, scanning electron microscope(SEM) and vibrating sample magnetometer(VSM), respectively. The results show that the crystals were prepared from the disproportionation reaction. Two ferromagnetic phases could also be observed, which could be attributed to the doping of K+ ions.

Key words: Hydrothermal synthesis, Disproportionation reaction, Three oxide states, Two ferromagnetic phases

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