• 한국결정성장학회지
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• 제34권5호
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• pp.156-162
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• 2024

탄화규소(SiC)는 기계적/화학적 특성이 우수한 소재로 항공우주, 방산, 원자력 발전과 같은 핵심 산업에서 널리 응용되고 있는 소재이다. 이러한 탄화규소는 마이크로파를 조사하면 급속발열 하는 특성이 알려져 고효율 발열체로 연구되고 있다. 본 연구에서는 폴리카보실란(Polycarbosilane)을 기계 화학적 반응법으로 아이오딘 불융화(curing)처리 하였고, 이를 열분해(Pyrolysis)하여 마이크로파 발열 소재를 제조하였다. 열분해 온도 및 아이오딘 첨가량이 마이크로파 발열에 미치는 영향을 조사하였다. 그 결과 제조된 시편은 약 60초내에 최대 800℃까지 급속 발열하는 것으로 나타났으며, 평균 700~750℃의 온도 구간에서 120분의 장시간 동안 일정하게 온도를 유지하였다.

• 한국세라믹학회지
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• 제53권6호
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• pp.707-711
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• 2016

A small diameter of SiC fiber mat can produce much higher heat under microwave irradiation than the other types of SiC materials. Fabrication of high strength SiC fiber consists of iodine vapor curing on polycarbosilane precursor and heat treatment process. The curing stage of polycarbosilane fiber was maintained at $150-200^{\circ}C$ in a vacuum condition under the iodine vapor to fabricate a high thermal radiation SiC fiber. The structure and morphology of the fibers were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TG) and scanning electron microscopy (SEM). In this study, the thermal properties of SiC fiber mats under microwave have been analyzed with an IR thermal camera and its image analyzer. The prepared SiC fiber mats radiated high temperature with extremely high heating rate up to $1100^{\circ}C$ in 30 seconds. The fabricated SiC fiber mats were not oxidized after the heat radiation process under the microwave irradiation.

• 한국재료학회지
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• 제30권9호
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• pp.489-494
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• 2020

SiC is a material with excellent strength, heat resistance, and corrosion resistance. It is generally used as a material for SiC invertors, semiconductor susceptors, edge rings, MOCVD susceptors, and mechanical bearings. Recently, SiC single crystals for LED are expected to be a new market application. In addition, SiC is also used as a heating element applied directly to electrical energy. Research in this study has focused on the manufacture of heating elements that can raise the temperature in a short time by irradiating SiC-I₂ with microwaves with polarization difference, instead of applying electric energy directly to increase the convenience and efficiency. In this experiment, Polydimethylsilane (PDMS) with 1,2 wt% of iodine is synthesized under high temperature and pressure using an autoclave. The synthesized Polycarbosilane (PCS) is heat treated in an argon gas atmosphere after curing process. The experimental results obtain resonance peaks using FT-IR and UV-Visible, and the crystal structure is measured by XRD. Also, the heat-generating characteristics are determined in the frequency band of 2.45 GHz after heat treatment in an air atmosphere furnace.