Effects of Oxidation Curing of Polycarbosilane on Dielectric and Microwave Absorption Properties of PDCs‐SiC Ceramics
Source abstract
Abstract
Polycarbosilane (PCS) was cured by oxidizing at different temperatures and pyrolyzed at 1000°C in vacuum. The dielectric properties of SiC ceramics were studied in X band. The ε′ and ε″ of SiC ceramics derived from oxidation‐curing PCS decreased to 4 and 0.35, respectively, which attribute to the decrease of free carbon content and order. SiC ceramic derived from PCS cured at 180°C showed that reflection loss was lower than −10 dB in the frequency range from 8.2 to 11.3 GHz and the minimum value was −26.7 dB at 9.6 GHz, which exhibits a promising prospect as microwave‐absorbing materials.
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Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced ceramic materials synthesis · Microwave Dielectric Ceramics Synthesis
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Affiliations
State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an Shaanxi 710072 China
School of Science Xi'an University of Architecture and Technology Xi'an Shaanxi 710055 China
College of Materials and Mineral Resources Xi'an University of Architecture and Technology Xi'an Shaanxi 710055 China
Funding
National Natural Science Foundation of China
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