Influence of Thermal-Shock Experiment on Material Properties of Fused Silica Ceramic Radome
Being low at expansion coefficient,low at heat-conductivity coefficient,low at permittivity and at dielectric loss,good in corrosion resistance,and high at thermal-stability,fused silica is sometimes thought of as being the promising candidate for radome in aero-craft.In the present study,researchers re-veal the influence of thermal-shock experiment on the material properties of fused silica radome via me-chanical/thermal tests,scanning electron microscopy,and X-Ray diffraction.It is found that mechanical strength of fused silica is incremental after thermal-shock experiment.And the reason is that the occur-rence of diffusion migration happens during the experiment to make the fused silica particles fused and re-combined flakily.In addition,the effects of thermal-shock experiment on expansion coefficient,heat-con-ductivity,permittivity and dielectric loss are comparatively minor.
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