化学溶液法制备La_2NiMnO_(6+δ)及其结构表征  

Synthesis and Characterization of La_2NiMnO_(6+δ) by Chemical Solution Route

作　　者：张小玲[1] 张成孝[1] 张国防[1] 刘国庆[2] 李成山[2] 闫果[2] 卢亚锋[2] 

机构地区：[1]陕西师范大学,陕西西安710062 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2009年第A01期151-154,共4页Rare Metal Materials and Engineering

基　　金：国家863计划课题的资助(2006AA03Z204)

摘　　要：分别利用固态反应法和化学溶液法制备了La2NiMnO6+δ氧化物块材。利用热重分析(TG)对化学溶液法前驱体混合物的热分解过程进行了研究;利用X射线衍射(XRD)和扫描电子显微镜(SEM)对2种方法合成的La2NiMnO6+δ氧化物的相组成和形貌结构进行了表征。结果表明,选择合适的前驱体(La(NO3)3、Ni(NO3)2、Mn(CH3COO)2),利用化学溶液法可以在较低温度和较短时间热处理得到单相的La2NiMnO6+δ氧化物,其晶粒平均尺寸约为200nm。Bulk samples of La2NiMnO6＋δ oxides were synthesized in air by solid state reaction and chemical solution route. Thermogravimetric （TG） analysis was employed to investigate the pyrolysis process of the precursor gel for chemical solution route. X-ray diffraction （XRD） and scanning electron microscopy （SEM） were used to study phase composition and microstrueture of samples prepared by the two kinds of methods. Our results have shown that a single-phase compound of La2NiMnO6＋δ could be obtained within low temperature range （800 ℃ - 1000 ℃） and for short sintering duration （3 h） by chemical solution route with La（NO3）3; Ni（NO3）2 and Mn（CH3COO）2 as precursor. The average grain size of the obtained compound is about 200 nm.

关 键 词：La2NiMnO6+δ 化学溶液法 合成 

分 类 号：O614.331[理学—无机化学]