溶剂热结合热压法制备Sn_xCo_4Sb_(12)化合物的热电性能(英文)  

Thermoelectric Properties of Sn_xCo_4Sb_(12) Prepared by Solvothermal Synthesis and Hot Pressing

作　　者：秦臻[1] 杜永[1] 蔡克峰[1] 

机构地区：[1]同济大学,上海200092

出　　处：《稀有金属材料与工程》2011年第S1期231-233,共3页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50872095)

摘　　要：以无水乙醇为溶剂用溶剂热法在200℃反应48h,制备名义组成为SnxCo4Sb12(x=0,0.1)的纳米粉末。纳米粉末在氩气保护下350℃热处理10h后,在625℃,80MPa条件下热压制得块体样品。通过XRD和SEM分析样品的成分和显微结构。测试样品在室温下的霍尔效应以及室温至723K范围内的赛贝克系数和电导率。CoSb3掺杂Sn后导电类型由n-型变为p-型,掺杂后电学性能显著提高。Nanopowders with nominal compositions of SnxCo4Sb12 (x=0, 0.1) were prepared via solvothermal synthesis in ethanol at 200 °C for 48 h and then heat treatment in argon at 350 °C for 10 h. The nanopowders were hot pressed at 625 °C and 80 MPa to obtain bulk samples. The compositions of the powders and bulk samples were determined by X-ray diffraction and the microstructure of the bulk samples were observed by scanning electron microscopy. The Hall effect measurement of the bulk samples was carried out at room temperature. Seebeck coefficient and electrical conductivity of the samples were measured from room temperature to around 723 K. The conduction type of the samples changes from n- to p-type after doping Sn into CoSb3. The electrical properties are obviously improved by doping Sn into the CoSb3.

关 键 词：方钴矿 溶剂热 热压 热电 

分 类 号：O614.432[理学—无机化学]