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PTC热敏电阻材料低阻化研究

陈新奇, 叶勐, 何宇, 陈寿田

陈新奇, 叶勐, 何宇, 陈寿田. PTC热敏电阻材料低阻化研究[J]. 北京工业大学学报, 1994, 20(3): 66-69.
引用本文: 陈新奇, 叶勐, 何宇, 陈寿田. PTC热敏电阻材料低阻化研究[J]. 北京工业大学学报, 1994, 20(3): 66-69.
Chen Xinqi, Ye Meng, He Yu, Chen Shoutian. An Experimental Research of Lowering Resistivity of PTC Thermistor Material[J]. Journal of Beijing University of Technology, 1994, 20(3): 66-69.
Citation: Chen Xinqi, Ye Meng, He Yu, Chen Shoutian. An Experimental Research of Lowering Resistivity of PTC Thermistor Material[J]. Journal of Beijing University of Technology, 1994, 20(3): 66-69.

PTC热敏电阻材料低阻化研究

详细信息
  • 中图分类号: TQ174.56

An Experimental Research of Lowering Resistivity of PTC Thermistor Material

  • 摘要: 通过调整Al2O3/SiO2的摩尔比,在晶界中形成了对Fe2O3、MgO等杂质有较大固溶能力的莫来石微晶,降低了晶粒表面势垒,达到降低室温电阻率的目的.总结了高温淬火与室温电阻率及PTC效应之间的规律,确定了适于低阻PTC材料的烧成工艺,并研制出了室温电阻率ρ20℃为12.1Ω·cm,Rmax/R20℃为2.3×103的低阻样品.
    Abstract: Intergranular mullite microcrystals have been obtained through adjusting the mole ratio of Al2O3/SiO2. It shows comparatively strong solubility to Fe2O3, MgO and other foreign substances. Therefore the borrier potential of crystallite can be lowered, and the desired effect of lowering specific resistance can be brought about. In addition, the relationship between quench temperature and specific resistance and the positive temperature coefficient (PTC dffect at) room-temperature has been presented. As well a proper sintering technique for producing PTC material with low specific resistance has been confirmed and a sample product with low resistivity of 121.1Ω·cm at room-temperature, with Rmax/R20℃ of 2.3 ×103, has been developed.
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出版历程
  • 收稿日期:  1994-01-20
  • 网络出版日期:  2022-08-08
  • 发布日期:  1994-09-09

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