电化学处理后CVD法SiC纤维阻抗特性及电阻率测量  

Impedance Characteristics and Specific Resistance of Electrochemically Treated CVD SiC Fibers

作　　者：罗鲲[1] 石南林[1] 段亚丁[1] 祖亚培[1] 史志明[1] 

机构地区：[1]中国科学院金属研究所,沈阳110015

出　　处：《宇航材料工艺》2001年第3期45-48,共4页Aerospace Materials & Technology

基　　金：国家 8 6 3课题资助项目!86 3-715 -0 11-0 130

摘　　要：采用交流阻抗法在 50Hz～ 50 0 0 0Hz范围内测量了电化学处理前后的CVD法SiC纤维样品 ,确定其具有电阻阻抗特征。通过模拟电路分析推导出计算纤维平均体电阻率及表面层电阻率的方法 ,并计算出SiC纤维表面氧化层的电阻率为 5× 1 0 4 Ω·m左右。The impedance characteristics of CVD SiC fibers before and after electrochemical treatment are detected by alternating current impedance method in frequency range of 50 Hz～50 kHz, and are confirmed to be resistive. Analyzed by simulative circuit, a method to calculate the bulk specific resistance of the SiC fiber and the specific resistance of the oxide surface layer is employed,and specific resistance of the oxide surface layer is about 5×10 4 Ω·m as a result. Various factors of effect on the specific resistance are also discussed in this paper.

关 键 词：CVD SIC纤维 电阻抗特性 电阻率 测量 电化学处理 碳化硅纤维 

分 类 号：TQ343.6[化学工程—化纤工业]