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Ag2Te掺杂对p型Bi0.5Sb1.5Te3块状合金热电性能的影响
  • ISSN号：1000-324X
  • 期刊名称：《无机材料学报》
  • 时间：0
  • 分类：TB34[一般工业技术—材料科学与工程]
  • 作者机构：[1]浙江大学材料系硅材料国家重点实验室,杭州310027
  • 相关基金：国家基础研究项目（2007CB607502）; 国家“863”研究计划（2007AA03Z234）; 国家自然科学基金（50731006）; 教育部博士点基金（20060335126）
作者： 沈俊杰[1], 朱铁军[1], 蔚翠[1], 杨胜辉[1], 赵新兵[1]
关键词： 铋锑碲合金, 晶格热导率, 热电材料, BiSbTe alloy, lattice thermal conductivity, thermoelectric materials
中文摘要：

采用真空熔炼、机械球磨及放电等离子烧结技术（SPS）制备得到了（Ag2Te）x（Bi0.5Sb1.5Te3）1-x（x=0,0.025,0.05,0.1）系列样品,性能测试表明,Ag2Te的掺入可以显著改变材料的热电性能变化趋势,掺杂样品在温度为450-550K范围内具有较未掺杂样品更优的热电性能.适当量的Ag2Te掺入能够有效地提高材料的声子散射,降低材料的热导率.在测试温度范围内,（Ag2Te）0.05（Bi0.5Sb1.5Te3）0.95具有最低的晶格热导,室温至575K范围内保持在0.2-0.3W/（m·K）之间,在575K时,（Ag2Te）0.05（Bi0.5Sb1.5Te3）0.95试样具有最大热电优值ZT=0.84,相较于未掺杂样品提高了约20%.

英文摘要：

（Ag2Te）x（Bi0.5Sb1.5Te3）1-x（x=0,0.025,0.05,0.1） alloys were synthesized by ＂Melting-Ball Milling-Spark Plasma Sintering＂ method.Transport properties measurements indicate that the Ag2Te-doping can affect the temperature dependence of thermoelectric properties of the samples significantly.Samples with Ag2Te-doping have better thermoelectric performances in the temperature range from 450 K to 550 K.Appropriate amount of Ag2Te can enhance the phonon scattering of the alloys effectively,which lead to the lower thermal conductivities for these samples.Over the entire temperature range,sample（Ag2Te）0.05（Bi0.5Sb1.5Te3）0.95 exhibits the lowest lattice thermal conductivities,ranging within 0.2-0.3 W/（m·K） from room temperature to 575 K.The maximum ZT value of 0.84 is obtained at 575 K for the sample（Ag2Te）0.05（Bi0.5Sb1.5Te3）0.95.Compared with the one without doping,the ZT value is increased by almost 20%.

同期刊论文项目
高性能热电材料的非平衡态制备科学和电声输运协调
期刊论文 148 获奖 2 专利 10
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期刊信息
  • 《无机材料学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学院上海硅酸盐所
  • 主编：郭景坤
  • 地址：上海市定西路1295号
  • 邮编：200050
  • 邮箱：wjclxb@mail.sic.ac.cn
  • 电话：021-52411302
  • 国际标准刊号：ISSN：1000-324X
  • 国内统一刊号：ISSN：31-1363/TQ
  • 邮发代号:4-504
  • 获奖情况:
  • 获"中国百种杰出学术期刊"称号
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,美国科学引文索引（扩展库）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,瑞典开放获取期刊指南,中国北大核心期刊（2000版）
  • 被引量:21274