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Si3N4/SiC复合陶瓷粉末的研制
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TQ174.758

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Preparation of Si_3N_4/ SiC Composite Ceramic Powder
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    摘要:

    研究了添加晶种的碳热还原SiO2法制取Si3N4/SiC复合粉末的工艺。发现反应温度的升高、反应时间的延长、原料SiO2粉比表面的增大、添加Si3N4晶种以及提高N2流速,均有利于Si3N4、SiC相含量的增加。当SiO2:C为1:2,加入10Wt%Si3N4品种时,在1350℃下于N2流速为0.4m3·h-1气氛下反应4h,可得到平均粒度为0.46m,含N23.9wt%、C6.25Wt%、O2.90wt%的Si3N4/SiC超细复合粉末。

    Abstract:

    his paper presents the production technique of Si3N4/ SiC composite powder by carbothermic reduction of silica. The influences of process parameters, such as reaction temperature, time, original powder property, the ratio of SiO2/ C, the flowing rate of N2 and the adding amount of Si3N4, on the production properties are discussed. It has been found that the raising of reaction temperature,prolonging of reaction time, increasing of specific surface of original SiO2 powder,the ratio of SiO2 / C and the flowing rate of N2,are of advantage for the forming of Si3N4 and SiC phase.The ultrafine powder has been produced by controling each process condition at the same time.

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谈萍 汤慧萍. Si3N4/SiC复合陶瓷粉末的研制[J].稀有金属材料与工程,1994,(3):49~54.[Tan Ping, Tang Huiping, Li Zengfeng. Preparation of Si_3N_4/ SiC Composite Ceramic Powder[J]. Rare Metal Materials and Engineering,1994,(3):49~54.]
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