为探讨乙炔炭黑水泥基复合材料的压敏性,验证了利用基于埋入式环状电极的四电极法测试复合材料电阻的可行性;研究了一次加载至破坏时乙炔炭黑水泥基复合材料的电阻率变化规律,并通过在弹性阶段的加载考察了乙炔炭黑水泥基复合材料压敏性的重现性;分析了测试电流和试件偏压对压敏性的影响.研究结果表明,基于埋入式环状电极的四电极法测试压敏水泥基材料的电阻误差小于10%,用于复合材料电阻的测试是可行的.掺量15 vol%的乙炔炭黑水泥基复合材料一次加载至破坏,电阻率变化率最大可达55%,弹性阶段电阻率变化率可达35%以上,且其压敏性基本不受测试电流和试件偏压的影响.乙炔炭黑是制备具有高感知灵敏度的压敏水泥基材料的一种有效功能组分.
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