Ba_2InSbO_6双钙钛矿的水热合成及^(121)Sb Mssbauer谱表征(英文)  

Hydrothermal Synthesis and ^(121)Sb Mssbauer Characterization of Double Perovskite Ba_2InSbO_6

作　　者：梅晓岩[1] 别利剑[2] 马程浩[3] 黄洪波[4] 刘荣厚[1] 郑文君[3] 夏元复[4] 

机构地区：[1]上海交通大学农业与生物学院,上海200240 [2]天津理工大学材料科学与工程学院,天津300191 [3]南开大学化学学院材料化学系,天津300071 [4]南京大学物理系,南京210093

出　　处：《无机化学学报》2008年第2期218-224,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20273033,20571044);南开大学本科生科研百项创新工程资助项目

摘　　要：在温和水热条件下,合成了双钙钛矿型Ba2InSbO6,采用XRD、TEM、XPS、ICP及IR等技术表征产物的结构及组成。XRD数据的Rietveld拟合结果表明,Ba2InSbO6为a=0.416782(13)nm的立方钙钛矿结构,属于Pm3m。121SbMssbauer谱测试表明,产物的同质异能移可归属为SbⅤ及Sb-O键具有明显的共价特征。合成条件的研究表明,Sb源对合成具有重要影响,且Sb2O3锑源可有效地降低杂质的生成。A double perovskite-type Ba2InSbO6 was prepared by a mild hydrothermal process. The product was characterized by XRD, TEM, XPS, ICP and IR techniques. Primary structural determination using Rietveld method based on XRD data shows that Ba2InSbO6 is indexed with a cubic cell and assigned to space group Pm3m with a= 0.416 782（13） nm. Measurement of the Mossbauer effect of the 37.2 keV γtransition of ^121Sb indicats that the isomer shift falls in the region of the Sbv and reflects some hybridized-orbital behavior. The influences of hydrothermal conditions on the synthesis were investigated. Then Sb source plays an important role and impurities are significantly decreased when Sb2O3 is used as the Sb source.

关 键 词：水热合成 ^121SbMssbauer谱 双钙钛矿型氧化物 Ba2InSbO6 

分 类 号：O611.2[理学—无机化学] O614.233[理学—化学]