元素A对钨青铜A_xWO_3晶体结构的影响  

Effects of element A on the crystal structure of tungsten bronzes A_xWO_3

作　　者：郭娟[1] 卢喜凤 郜超军[1] 侯晓强[1] 

机构地区：[1]郑州大学物理工程学院,郑州450001

出　　处：《功能材料》2015年第17期17008-17013,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51302249)

摘　　要：AxWO3(0<x<1)型钨青铜是一类非整比化合物,具有丰富的物理特性,广泛应用于光学、电学和化学等领域。综述了文献已报道的钨青铜,按元素A的不同可将钨青铜分为5大类。通过对各种钨青铜的晶体结构分析,发现A离子的半径rA满足一定条件(0.086nm<rA<0.143nm)时可以形成钙钛矿类型的结构,当rA较大时可形成六方结构的钨青铜;而且A离子的价态越高,所形成钨青铜单相区x的范围就越窄。Tungsten bronzes AxWO3(0<x<1)are a group of nonstoichiometric compounds.They have been found wide applications such as in optical,electrical and chemical fields.The types and crystal structures of tungsten bronzes have been reviewed in this paper.According to the element A,tungsten bronzes could be classified into five types.As the radius of A ion,rA,was in the range of 0.086-0.143 nm,the perovskite-type tungsten bronzes could be formed.As the rA was large and out of the range,the hexagonal ones can be formed.It was also found that the higher the valance of A ion was,the narrower the range of xfor single-phase tungsten bronzes was.

关 键 词：钨青铜 离子半径和价态 晶体结构 

分 类 号：TB34[一般工业技术—材料科学与工程] O742[理学—晶体学]