灰锡自溶剂法Ba/Eu复合填充Ⅷ型Sn基单晶笼合物的制备及电传输特性  

Electrical Transport Properties of Ⅷ-type Sn-based Single-crystal Clathrates( Eu/Ba)_8Ga_(16)Sn_(30) Prepared by Grey Sn Flux Method

作　　者：程峰[1] 王劲松[1] 刘虹霞[1] 申兰先[1] 邓书康[1] 

机构地区：[1]云南师范大学太阳能研究所,可再生能源材料先进技术与制备教育部重点实验室,昆明650500

出　　处：《人工晶体学报》2016年第2期366-370,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51262032)

摘　　要：采用灰锡自溶剂法制备Ⅷ型Sn基单晶笼合物,并通过Eu对其进行掺杂。研究表明所制备样品均为空间群为I43m的p型Ⅷ型Sn基单晶笼合物,Eu原子趋于取代Ba原子,且随着Eu元素起始含量的增加,材料晶格常数减小,熔点升高,较低的载流子浓度与较高的载流子迁移率使得材料Seebeck系数与电导率都有所提升,Eu起始含量x=0.50的样品其ZT值在480 K处获得最大值0.87。The type-VIII Sn-based single-crystal clathrates with different stoichiometric ratio were prepared by grey Sn flux method and the structure of the samples were investigated. The results indicate that the samples are all p-type VIII-type Sn-based single-crystal clathrates in space group I43 m and Eu atoms tend to replace Ba atoms. The introduced Eu atoms leads to a increase in the materials melting point,while the lattice parameters decreased. The Seebeck coefficient and the Electrical conductivity are increased because of the high Carrier mobility and the low Carrier concentration. However,the sample that the Eu initial content x = 0. 50 get the highest ZT value of 0. 87 at 480 K.

关 键 词：灰锡自溶剂法 单晶笼合物 ZT值 

分 类 号：O7[理学—晶体学]