(National Key Laboratory of Advanced Functional Composite Materials, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China)
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DOI:
10.7502/j.issn.1674-3962.2012.08.01
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Abstract:
The technique of high temperature wave transparent materials is the key technique for the communication and navigation of hypersonic vehicles. This paper reviews the research and developments of high temperature wave transparent materials and relative fields in recent years, including the material system, the high temperature dielectric properties and the high temperature dielectric parameters measurement. For material system, the quartz ceramics and quartz fiber reinforced composites are the main applicable materials so far; the porous nitride ceramics and composites will be an important development trend in the future. For the high temperature dielectric properties, the important progress and experimental verification have been made on the high temperature dielectric behaviors of typical oxides, nitrides and nitrogen oxide as well as the effects of impurities on dielectric properties. For the high temperature dielectric parameters measurement, the key technique of board band dielectric measurement from room temperature to 1 600 ℃ has been developed recently and the dielectric parameters of fusing silicon oxide have been successfully obtained for the first time. Moreover, the realtime measurements for high temperature wavetransparent properties under the condition of 8 MW/m2heat flux are achieved.