西华大学学报（自然科学版）2011，Vol.30Issue(6)：95-98,4.
Al2O3对PbTe微观结构和热电性能的影响
The Effect of Al2O3 on the Microstructure and Thermoelectric Property of PbTe
摘要
Abstract
The TloraPba0.98Te sample prepared by ball milling and hot pressing has good thermoelectric property, but softens in high temperature. The addition of Al2O3, nano powder effectively strengthens the sample. At the same time, the A12O3 nano powder distributes uniformly at the grain boundary and prevents grain growth during hot pressing process, which decreases the grain size by about 50 times than that without A12O3 addition. The increased interface of refined grains scatters more long wave length phonons and decreases the lattice thermal conductivity by about 20% , resulting in 1.3 ZT in Tl0.02Pb0.98Te(Al2O3) sample at 723 K.关键词
热电材料/Al2O3/细化晶粒/球磨/热压Key words
thermoelectric material/ A12O3/ refined grain/ ball milling/ hot pressing分类
通用工业技术引用本文复制引用
张勤勇..Al2O3对PbTe微观结构和热电性能的影响[J].西华大学学报（自然科学版）,2011,30(6):95-98,4.
