“声子液体”热电材料研究进展  

Recent progress in “phonon-liquid” thermoelectric materials

作　　者：刘灰礼[1,2] 何颖[1,2] 史迅[1] 郭向欣[1] 陈立东[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050 [2]中国科学院大学,北京100049

出　　处：《科学通报》2013年第25期2603-2608,共6页Chinese Science Bulletin

基　　金：国家自然科学基金(51222209;51121064)资助

摘　　要：热电转换技术利用半导体材料的塞贝克效应(Seebeck effect)和帕尔贴效应(Peltier effect)可实现热能与电能的直接相互转换,是一种清洁利用能源的有效方式.快离子导体一般应用于电池材料.本文论述了近期研究中采用快离子导体的基本特性来探索高性能热电材料的研究进展,详细介绍了快离子导体的两套亚点阵结构可有效优化材料的电热输运特性,从而实现热电材料的"横波阻尼效应";提出了"声子液体"新概念,为热电材料性能优化和新热电化合物的探索提供新的思路和方向.Thermoelectric technology is a clean energy technique, which has the advances in the direct energy conversion between electricity and heat using Seebeck and Peltier effects in semiconductors. The applications of superionic conductors are usually focusing on battery materials. This paper describes the recent progress by combing the research of superionic and thermoelectric materials. The superionic conductor has two different sublattices, which could provide a unique character to optimize electrical and thermal transports of thermoelectric materials, leading to the effect of cutting phonon transverse waves and thus a series of novel thermoelectric materials within the concept of ＂phonon-liquid＂. This new concept provides a good guiding principle for the optimization of current thermoelectric materials and discovery of new high performance thermoelectric compounds.

关 键 词：热电材料 快离子导体 “声子液体”热电材料 热导率 横波阻尼效应 

分 类 号：TB34[一般工业技术—材料科学与工程]