钙钛矿型锰酸盐(Sm_(0.4)Ca_(0.6)MnO_3)的水热合成及其电性能  

Hydrothermal Synthesis and Electonic Properties of a Perovskite Manganate(Sm_(0.4)Ca_(0.6)MnO_3)

作　　者：杨铭[1] 郝苇苇[1] 

机构地区：[1]苏州大学材料与化学化工学院,江苏苏州215123

出　　处：《合成化学》2015年第9期798-800,805,共4页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(21203132)

摘　　要：以Sm(NO3)3,Ca(NO3)2,KMn O4和Mn Cl2为原料,用水热法合成了混合价态的钙钛矿型锰酸盐Sm0.4Ca0.6Mn O3(1),其结构和性能经SEM,元素分析,TGA,XRD,XPS,I-V曲线和变温电阻表征。结果表明:1为黑色立方晶体,正交晶系,空间群Pnma;1的晶胞参数a=5.336(6),b=5.341(7),c=7.491(6),V=213.56(3)3;1的热稳定性较好,有半导体特性和负磁电阻效应。A mixed-valence perovskite manganate, Sm0.4Ca0.5MnO3 （1）, was synthesized by hydrothermal method, using Sm（ NO3 ） 3, Ca（ NO3 ） 2, KMnO4 and MnC12 as materials. The structure and properties were characterized by SEM, elemental analysis, TGA, XRD, XPS, I-V curve and ther- mistor measurement. The results showed that 1 was black cubic crystal and belong to orthorhombic system, Pnma space group. The cell parameters of 1 were a =5. 336（6） A, b =5. 341（7） A, c = 7. 491 （6） A, V = 213.56 （3） A3. 1 exhibited better thermostability, semiconductor property and negative magneto resistance effect.

关 键 词：钙钛矿 锰酸盐 水热法 合成 磁性能 

分 类 号：O611.4[理学—无机化学] O617.7[理学—化学]