CAJ | 학술논문

利用先驱体熔融纺膜法，经熔融纺膜、氧化交联及900~1200℃不同裂解温度制得系列自支撑硅氧碳纳米镶嵌复合薄膜.利用红外光谱(FT-IR)分析氧化交联后及高温裂解薄膜的结构变化，通过 X 射线衍射(XRD)、拉曼光谱(Raman)与扫描电镜(SEM)对薄膜微观结构及形貌进行分析，采用电阻测试仪和激光热导仪对其进行电阻率与热导率进行表征.结果表明，硅氧碳纳米镶嵌复合薄膜具有较好的绝缘性能与热传导能力，随着裂解温度升高，薄膜电阻率减小，热导率大幅度增大.1200℃制备的样品具有合适电阻率和最佳热导率(46．8 W/(m·K))，薄膜以非晶态相SiOx Cy 和游离碳为基体，细小等轴β-SiC晶弥散分布在基体中，其表面平整度高通过丝网印刷可获得两条平行的均匀致密高温银浆电路层，有望大规模应用于大功率LED封装散热基板.
이용선구체용융방막법，경용융방막、양화교련급900~1200℃불동렬해온도제득계렬자지탱규양탄납미양감복합박막.이용홍외광보(FT-IR)분석양화교련후급고온렬해박막적결구변화，통과 X 사선연사(XRD)、랍만광보(Raman)여소묘전경(SEM)대박막미관결구급형모진행분석，채용전조측시의화격광열도의대기진행전조솔여열도솔진행표정.결과표명，규양탄납미양감복합박막구유교호적절연성능여열전도능력，수착렬해온도승고，박막전조솔감소，열도솔대폭도증대.1200℃제비적양품구유합괄전조솔화최가열도솔(46．8 W/(m·K))，박막이비정태상SiOx Cy 화유리탄위기체，세소등축β-SiC정미산분포재기체중，기표면평정도고통과사망인쇄가획득량조평행적균균치밀고온은장전로층，유망대규모응용우대공솔LED봉장산열기판.
Freestandingβ-SiC/SiOx Cy/Cfree nanocomposite films were synthesized by melt spinning the polycar-bosilane (PCS)precursor.Their microstructure were characterized by Fourier transform infrared (FT-IR),X-ray diffraction (XRD)and Raman spectroscopy,morphology analysis was investigated by scanning electron mi-croscope (SEM).Resistivity and thermal conductivity of the films were measured at room temperature.Effect of pyrolysis temperatures on the heat dissipation properties of nanocomposite films were investigated.The re-sults show that thermal conductivity increases as the resistivity of theβ-SiC/SiOx Cy/Cfree films decreases by in-creasing pyrolysis temperatures.The sample sintered at 1 200 ℃ with good insulation (2.1 ×108 Ω·m)and high heat transfer capability (46.8 W/(m·K))can be silk-screened and used as heat dissipation substrate for high-power LED devices.The obtained results are expected to have important applications in high-temperature electronic and advanced optoelectronic devices.