...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Resistivity and Thermal Expansion (4.2-820 K) of Skutterudites after Severe Plastic Deformation via HPT
【24h】

Resistivity and Thermal Expansion (4.2-820 K) of Skutterudites after Severe Plastic Deformation via HPT

机译：通过HPT严重塑性变形后Skutterudites的电阻率和热膨胀（4.2-820 k）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermoelectric materials with a high figure of merit, ZT, are the essential basis to build thermoelectric generators, which can directly convert heat into electricity. Severe plastic deformation (SPD) via high-pressure torsion (HPT) was successfully applied to enhance ZT of ball-milled and hot-pressed skutterudites as well as to produce bulk nanostructured skutterudites directly from powders. SPD introduces many defects into the sample and in parallel the crystallite size is significantly reduced. During measurement-induced heating these defects anneal partially out, and the grains grow. In this work for the first time systematically the changes of the temperature-dependent electrical resistivity and of thermal expansion were compared. It could be shown that for p- and n-type skutterudites, being hot-pressed and HPT-processed as well as directly HPT-processed from compacted powder, these changes occur more or less simultaneously within the same temperature ranges. This evaluation gives a much deeper insight into the thermoelectric behavior of HPT samples under the influence of changing temperature.
机译：高性能热电材料ZT是制造热电发电机的重要基础，它可以直接将热量转化为电能。通过高压扭转（HPT）实现的严重塑性变形（SPD）已成功应用于提高球磨和热压Skutterudite的ZT，以及直接从粉末中制备大块纳米结构Skutterudite。SPD在样品中引入了许多缺陷，同时晶粒尺寸显著减小。在测量感应加热期间，这些缺陷部分退火，晶粒长大。在这项工作中，首次系统地比较了随温度变化的电阻率和热膨胀的变化。可以证明，对于p型和n型Skutterudite，经过热压和HPT处理，以及从压实粉末直接进行HPT处理，这些变化在相同的温度范围内或多或少同时发生。该评估对HPT样品在温度变化影响下的热电行为有了更深入的了解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号