Enhancement of thermoelectric properties of SrTiO3/LaNb–SrTiO3 composite by different doping levels

作     者：Ke-Xian Wang Jun Wang Yan Li Tao Zou Xiao-Huan Wang Jian-Bo Li Zheng Cao Wen-Jing Shi Xinba Yaer 王柯鲜;王俊;李艳;邹涛;王晓欢;李建波;曹正;师文静;新巴雅尔

作者机构：School of Materials Science and Engineering Inner Mongolia University of Technology Hohhot 010051 Inner Mongolia Autonomous Region China School of Chemical Engineering Kang Ba Shi Qu Ordos Ordos Institute of Technology Ordos 017000 Inner Mongolia Autonomous Region China Beijing Center for Physical & Chemical Analysis No. 27 Xi Sanhuan Road Haidian District Beijing 100089 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第4期

页      面：117-122页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0704[理学-天文学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61751404,51702168,and 51665042) the Fund from the State Key Laboratory of New Ceramic and Fine Processing(Tsinghua University),China(Grant No.KF201608) the Fund from the Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,China(Grant No.151004-K) the Natural Science Foundation of Inner Mongolia Autonomous Region,China(Grant Nos.2016BS0507 and 2015MS0509) 

主　　题：thermoelectric materials SrTiO3/LaNb-SrTiO3 composite hydrothermal method strontium titanate 

摘      要：Strontium titanate（STO）is an n-type oxide thermoelectric material,which has shown great prospects in recent *** doping of La and Nb into STO can improve its power factor,whereas its thermal conductivity is still very ***,in order to obtain a high thermoelectric figure-of-merit z T,it is very important to reduce its thermal *** this paper,using a combination of a hydrothermal method and a high-efficiency sintering method,we succeed in preparing a composite of pure STO and La Nb-doped STO,which simultaneously realizes lower thermal conductivity and higherSeebeck coefficient,therefore,the thermoelectric properties of STO are significantly *** the SrTiO3/La Nb–SrTiO3 bulk samples,the lowest thermal conductivity is 2.57 W·m^-1·K^-1 and the highest z T is 0.35 at 1000 K for the STO/La（10）Nb（20）–STO sample.