轻质复合材料高温隔热性能  

High-temperature thermal insulation performance of light mass composites

作　　者：蔺晓轩[1,2] 沈志洵[1,2] 魏玺[1] 张伟刚[1] 

机构地区：[1]中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《复合材料学报》2011年第1期8-14,共7页Acta Materiae Compositae Sinica

基　　金：中国科学院知识创新工程重要方向项目(YYYJ-0808-2)

摘　　要：设计了一套隔热材料高温(>1200℃)隔热效果的测试装置,可对隔热材料进行快速、低成本的有效测试和筛选。采用本装置在材料热面中心温度为1600℃±10℃时,考察了碳/酚醛复合材料和ZrO2纤维板材料背部升温历程,评价了2种材料的隔热性能,并采用有限差分法数值模拟了ZrO2纤维板材料背部升温历程,预测其有效导热系数。研究表明,在加热初期400 s时间内,碳/酚醛复合材料的隔热性能优于ZrO2纤维板的隔热性能,后期则相反;ZrO2纤维板的隔热性能与体积密度有关,有效导热系数随温度升高而非线性地增大。A device for thermal insulation performance of high-temperature materials was designed and established to test light mass thermal insulation materials via a rapid and simple procedure.The thermal insulation performance of carbon fiber/phenolic composite and ZrO2 fiberboard were tested by this device when the temperature at the center point of hot face was 1600 ℃±10 ℃.The heat transport process of ZrO2 fiberboard was numerically simulated by finite-difference method,and the effective thermal conductivity was also predicted.The results show that thermal insulation performance of carbon fiber/phenolic composite is better than that of ZrO2 fiberboard from the beginning of test to 400 s,while the thermal insulation performance of ZrO2 fiberboard is better from 400 s to the end of test.Thermal insulation performance of ZrO2 fiberboard is affected by the bulk density,and the effective thermal conductivity of ZrO2 fiberboard increases nonlinearly with the elevated temperature.

关 键 词：轻质复合材料 高温隔热性能 碳/酚醛 ZrO2纤维板 等离子弧发生器 

分 类 号：TB332[一般工业技术—材料科学与工程]