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发明授权
CN106045520B 一种具有低电阻率、线性电阻特性的碳化硅/石墨复合材料及其制备方法 有权

一种具有低电阻率、线性电阻特性的碳化硅/石墨复合材料及其制备方法
摘要：
本发明涉及一种具有低电阻率、线性电阻特性的碳化硅/石墨复合材料及其制备方法，所述碳化硅/石墨复合材料由碳化硅相和在烧结过程中由碳相转变而来的石墨相组成，不含第三相物质，所述石墨相的含量为10‑20wt%，所述碳化硅/石墨复合材料的热导率为110‑160W·m‑1·K‑1，直流电阻率为10～750Ω·cm且不随电压变化，交流电阻模值为0.5～45Ω且不随频率变化。本发明的复合材料仅含碳化硅和石墨相，不含第三相物质，通过调节石墨相的含量可以获得具有高热导性、低电阻率、线性电阻特性的碳化硅/石墨复合材料。
摘要（英）：

The invention relates to a low-resistivity linear-resistance silicon carbide and graphite composite and a preparation method thereof. The silicon carbide and graphite composite is composed of silicon carbide phase and a graphite phase converted from carbon phase during sintering and is free of third-phase substances, the graphite phase is 10-20% by weight, and the silicon carbide/graphite composite is 110-160 W/m<-1>/K<-1> in heat conductivity, 10-750 Omega/cm in direct-current resistivity that never changes with voltage, and 0.5-45 Omega in alternating-current resistivity modulus that never changes with frequency. The composite of the invention comprises only silicon carbide and graphite and is free of third-phase substances, and by adjusting the content of graphite, it is possible to obtain the silicon carbide/graphite composite with high heat conductivity, low resistance and linear resistance.

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