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研究论文

热电池铁粉加热药燃烧产物特性

  • 种晋 ,
  • 高学平 ,
  • 汪继强
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  • 中国电子科技集团公司第十八研究所;南开大学新能源材料化学研究所;

收稿日期: 2008-11-28

  修回日期: 2008-11-28

  网络出版日期: 2008-11-28

Combustion Product Characterization of the Iron-Heated Powders in Thermal Batteries

  • CHONG Jin ,
  • GAO Xue-ping ,
  • WANG Ji-qiang
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  • (1.Tianjin Institute of Power Sources,Tianjin 300381,China;2.Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China

Received date: 2008-11-28

  Revised date: 2008-11-28

  Online published: 2008-11-28

摘要

SEM(scanning electron microscope)、TEM(transmission electron microscope)形貌观察及XRD(x-raydiffraction)物相、EDX(energy dispersive X-ray detector)能谱分析表明,热电池用铁粉加热药经燃烧后其物相主要成分为Fe、FeO和KCl,并形成一层200 nm厚FeO壳层,该壳层包覆着未反应的Fe核.经导电类型鉴别确定室温下该材料具有以空穴导电为主的P型半导体导电特性.电导率103S.cm-1,比800 K时Fe的电导率低5个数量级.该材料虽具半导体导电特性,但并不增加热电池内阻.

本文引用格式

种晋 , 高学平 , 汪继强 . 热电池铁粉加热药燃烧产物特性[J]. 电化学, 2008 , 14(4) : 373 -377 . DOI: 10.61558/2993-074X.1924

Abstract

The combustion products of thermal battery used iron-heated powders have been studied.It is identified by X-ray diffraction(XRD) analysis that the main compositions of the combustion products are Fe、FeO and KCl.The transmission electron microscopy(TEM) shows a typical core-shell structure with un-reacted Fe particle core coated by FeO shell with a shell thickness of around 200 nm.The combusted iron-heated powders exhibit no metal property,which is contrast to previous assumption.Further measurement indicates that at the ambient temperature the combustion products show semiconductor property of the p-type with conductivity in the order of 103 S·cm-1,which is five order lower than that of the iron at 800 K.Since the FeO layer formed during the iron-heated powders combustion is thin,its contribution to the internal resistance of the thermal batteries is negligible.
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