有色金属材料与工程2025，Vol.46Issue(1)：67-74,8.DOI:10.13258/j.cnki.nmme.20240318001
h-BN对超低介电损耗COC/h-BN复合材料导热性能、介电性能的影响
Effect of h-BN on the thermal conductivity and dielectric properties of ultra-low dielectric loss COC/h-BN composites
摘要
Abstract
The microwave composites with high thermal conductivity of cycloolefin copolymer(COC)/hexagonal boron nitride(h-BN)(COC/h-BN)with different volume fractions(10%-30%)and different particle sizes(10,25 μm)h-BN were prepared by using twin-screw granulation and hot pressing technology.The microstructure,microwave dielectric properties and thermal properties of the composites were studied by scanning electron microscopy,vector network analyzer and thermal dilatometer.The results show that the COC/h-BN-25 composite has higher density and thermal conductivity than that of the COC/h-BN-10 composite.When the volume fraction of h-BN is 30%,the thermal conductivities of the COC/h-BN-25 composite reaches 0.766 W/(m·K)in the X/Y direction and 1.204 W/(m·K)in Z direction,with low dielectric loss.关键词
粒径/六方氮化硼/导热性能/介电性能/环烯烃类共聚物Key words
particle size/hexagonal boron nitride/thermal conductivity/dielectric property/cycloolefin copolymer分类
通用工业技术引用本文复制引用
钱康乐,彭海益,何代华,姚晓刚,林慧兴..h-BN对超低介电损耗COC/h-BN复合材料导热性能、介电性能的影响[J].有色金属材料与工程,2025,46(1):67-74,8.基金项目
国家自然科学基金资助项目(52302122) （52302122）
