Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon carbide ceramic and preparation method thereof
The preparation method of the silicon carbide ceramic provided by the invention mainly comprises the steps of slurry mixing, vacuum defoaming, curing molding, drying, green body carbonization and siliconizing sintering, and does not need to be aged, so that the preparation method is simplified; an isobutene-maleic anhydride copolymer is adopted for a gel reaction, and the isobutene-maleic anhydride copolymer is formed by mixing a medium-molecular-weight isobutene-maleic anhydride copolymer and a low-molecular-weight isobutene-maleic anhydride copolymer, so that the dispersion and curing speed of the slurry is increased; the sintering mode is that silicon carbide is used as a framework, graphite and phenolic resin react to generate silicon carbide, and the silicon carbide and liquid-phase silicon are combined for reactive sintering. The thermal conductivity of the silicon carbide ceramic prepared by the method is greatly improved and can reach 141W. M <-1 > K <-1 >, the thermal conductivity is improved by 33W. M <-1 > K <-1 > compared with that of a method in the prior art, the improvement rate is 30.56%, the preparation is convenient and simple, and efficient mass production is facilitated.
本发明提供的碳化硅陶瓷的制备方法，主要步骤包括浆料混合、真空消泡、固化成型、干燥、坯体碳化及渗硅烧结，无需陈腐，简化了制备方法；采用异丁烯马来酸酐共聚物发生凝胶反应，且异丁烯马来酸酐共聚物为中分子量异丁烯马来酸酐共聚物和低分子量异丁烯马来酸酐共聚物混合而成，提高浆料的分散和固化速度；烧结方式是以碳化硅为骨架，石墨及酚醛树脂反应生成碳化硅以及液相硅结合进行反应烧结。本方法制备的碳化硅陶瓷导热率大大提高，可达到141W·m‑1K‑1，比现有技术中的方法导热率提高了33W·m‑1K‑1，提高率30.56％，且制备方便简单，便于高效量产。
Silicon carbide ceramic and preparation method thereof
The preparation method of the silicon carbide ceramic provided by the invention mainly comprises the steps of slurry mixing, vacuum defoaming, curing molding, drying, green body carbonization and siliconizing sintering, and does not need to be aged, so that the preparation method is simplified; an isobutene-maleic anhydride copolymer is adopted for a gel reaction, and the isobutene-maleic anhydride copolymer is formed by mixing a medium-molecular-weight isobutene-maleic anhydride copolymer and a low-molecular-weight isobutene-maleic anhydride copolymer, so that the dispersion and curing speed of the slurry is increased; the sintering mode is that silicon carbide is used as a framework, graphite and phenolic resin react to generate silicon carbide, and the silicon carbide and liquid-phase silicon are combined for reactive sintering. The thermal conductivity of the silicon carbide ceramic prepared by the method is greatly improved and can reach 141W. M <-1 > K <-1 >, the thermal conductivity is improved by 33W. M <-1 > K <-1 > compared with that of a method in the prior art, the improvement rate is 30.56%, the preparation is convenient and simple, and efficient mass production is facilitated.
本发明提供的碳化硅陶瓷的制备方法，主要步骤包括浆料混合、真空消泡、固化成型、干燥、坯体碳化及渗硅烧结，无需陈腐，简化了制备方法；采用异丁烯马来酸酐共聚物发生凝胶反应，且异丁烯马来酸酐共聚物为中分子量异丁烯马来酸酐共聚物和低分子量异丁烯马来酸酐共聚物混合而成，提高浆料的分散和固化速度；烧结方式是以碳化硅为骨架，石墨及酚醛树脂反应生成碳化硅以及液相硅结合进行反应烧结。本方法制备的碳化硅陶瓷导热率大大提高，可达到141W·m‑1K‑1，比现有技术中的方法导热率提高了33W·m‑1K‑1，提高率30.56％，且制备方便简单，便于高效量产。
Silicon carbide ceramic and preparation method thereof
一种碳化硅陶瓷及其制备方法
CHEN YUHONG (Autor:in) / LIU RUIBIN (Autor:in) / XU ZHAOYUN (Autor:in) / HAI WANXIU (Autor:in) / CHEN ZHENXIANG (Autor:in)
03.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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