沥青基碳纤维导热系数测量不确定度的评定

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Evaluation of Uncertainty in Measurement of Thermal Conductivity of Pitch-based Carbon Fibers

WANGYan-qiu* WANG Xiang-dong WANG Shuo LOU Yuan-gang GAO Ang LIU Jian-guoHE Shui-miao HU De-peng DUWei （Shandong Ruicheng Aerospace Carbon Fiber Industry Technology Research Institute Co.， Ltd.） Abstract：AccordingtoGB/T258-28eterminationofthermaldiffsivityorhermalconductivitybytheflashmethod. andJF159-Evaluatnandexpressoofuncetaintyinmeasurement，teuncetaintyofthermalcductivitofpichbasedcarbonfibers wasmeasured.Through analysis，it wasfoundthatthe main sourcesofuncertaintywere sample density， specific heatcapacityofthesamplethermaldifusivityofthesample，repeatedtests，indicationerrorsanddatacection. Finally， the uncertainty of a pitch-based carbon fiber was determined to be when its thermal conductivity was 600 W/（m-K）.

Keywords： pitch-basedcarbonfiber，thermalconductivity， thermaldiffusioncoefficient， measurement uncertainty

0 引言

沥青基碳纤维是一种以石油沥青或煤沥青为原料，经精制、纺丝、预氧化、碳化或石墨化而制得的含碳量大于 95% 的特种纤维，属于新型的增强材料。（剩余4912字）