孔隙率对炭材料电阻率的影响

新型炭材料, 2013, 28(5): 349-354. doi: 10.1016/S1872-5805(13)60087-6

孔隙率对炭材料电阻率的影响

孙天鸣 ^1, , 董利民 ^2, , 王晨 ^3, , 郭文利 ^4, , 王莉 ^5, , 梁彤祥 ^6,

1.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

2.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

3.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

4.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

5.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

6.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

基金项目: 国家自然科学基金项目(21271114) Tsinghua University independent research and development fund(20111080982) 清华大学自主研发基金(20111080982) National Natural Science Foundation of China(21271114)

关键词：模型 , 炭材料 , 电阻 , 气孔率

Effect of porosity on the electrical resistivity of carbon materials

SUN Tian-ming ^1, , DONG Li-min ^2, , WANG Chen ^3, , GUO Wen-li ^4, , WANG Li ^5, , LIANG Tong-xiang ^6,

1.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

2.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

3.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

4.清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

5.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

6.清华大学核能与新能源技术研究院,精细陶瓷北京市重点实验室,北京100084

Keywords： Modeling , Carbon material , Resistivity , Porosity

依据经典流体力学理论,建立了真实密度和孔隙率对炭素材料电阻率影响规律的模型.模型计算结果表明,真实密度对炭素材料的电阻率影响较小,偏差小于3％;开孔气孔率对电阻的影响大于闭孔气孔率,开孔气孔率增加40％时电阻率增加了250％,而相同幅度闭孔气孔率的增加引起电阻率的增加值只有25％.模型计算结果与实测值偏差小于2％,表明模型具有较好的精度.

参考文献

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