本文研究了β-SiC微粉及β-SiC-环氧脂漆复合防晕涂层的非线性导电性。表明小粒 径β-SiC非线性好，粒径越小电阻越低非线性系数越大，粒径在14～21μm之间时非线性最 好 。与粒径相近的α-SiC相比，β-SiC的非线性系数大、电阻率低。β-SiC防晕涂层的非 线性 系数随粒径增大或合成温度提高而变大；同粒度条件下，则随β-SiC含量提高而增大，防 晕 电压升高。β-SiC调节α-SiC防晕涂层的电阻率和非线性可有效地提高材料的非线性，改 善防晕效果。%Non-linear electrical conductivity property of β-SiC and β-SiC-ep oxy ester lacquer composite coating layer was investigated. Smaller particle size β - SiC has lower resistance and greater non-linear coefficient. β-SiC has the mo st excellent non-linearity when particle size varies from 14～21μm. Non-linearit y of composite coating layer becomes greater by increasing β-SiC powder particle size or synthesis temperature. With same particle size, non-linear coefficient a nd corona voltage are rising with β-SiC content increased. Good effect has bee n obtained as β-SiC is used to regulate the non-linear electrical conductivity of α-SiC anti-corona material, showing that it can increase non-linearity and i mprove anti-corona property greatly.
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