摘要
采用热压罐工艺制备了石英纤维增强聚酰亚胺复合材料。分别测试了材料室温和350℃下的力学性能、热物理性能及介电性能,对比分析了密度、温度及频率对材料介电性能的影响。结果表明：石英增强聚酰亚胺复合材料在室温-350℃范围内有着良好的力学性能;热导率为0.24-0.28W·m-1·K-1,热膨胀系数约为5.38×10-6/℃;介电常数在2.95-3.10之间,损耗角正切值小于8.0×10-3。
Quartz fiber rein-forced polyimide composite was fabricated by the autoclave process. The mechanical,thermal,and dielectric properties were tested at room-temperature and 350℃. The influence of the density,environment temperature and test frequency on the dielectric property were analyzed. The results show that the quartz fiber rein-forced polyimide composite presents excellent mechanical property at room-temperature and 350℃. Thermal conductivity is about 0. 24-0. 28W·m-1·K-1,thermal expansivity is 5. 38 ×10-6/ ℃,and dielectric constant is 2. 95-3. 10,tanδ 8. 0 × 10-3.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2015年第4期34-38,共5页
Journal of Aeronautical Materials
关键词
复合材料
介电性能
热稳定性
石英/聚酰亚胺
天线系统
力学性能
composite
dielectric property
thermo-stability
quartz fiber rein-forced polyimide
antenna system
mechanical property
