Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to a composite ceramic material and a preparation method thereof. The composite ceramic material comprises the following raw materials in parts by weight: 90 to 120 parts of silicon carbide, 10 to 20 parts of carbon fiber, 10 to 25 parts of silicon powder, and 5 to 8 parts of carbon black, wherein the silicon carbide is composed of millimeter-grade silicon carbide and submicron-grade silicon carbide according to a weight ratio of (5-20):1. Carbon fibers are adopted to prepare the composite ceramic material, and at the same time, silicon carbide with different particle sizes are reasonably compounded, so the high temperature flexural strength of the ceramic material is effectively improved, compared with the prior art. Furthermore, the composite ceramic material can be repeatedly used, disposable material solid wastes (quartz crucible, eg.) are greatly reduced; and in the whole composite material system, no oxygen exists, so oxygen will not react with silicon liquid during the application process, and the product quality is improved. At the same time, the characteristics of the composite ceramic material such as long service life, oxygen-free property, and the like, can promote the development of technologies of monocrystal continuous feeding and pseudo-single crystal.
The invention relates to a composite ceramic material and a preparation method thereof. The composite ceramic material comprises the following raw materials in parts by weight: 90 to 120 parts of silicon carbide, 10 to 20 parts of carbon fiber, 10 to 25 parts of silicon powder, and 5 to 8 parts of carbon black, wherein the silicon carbide is composed of millimeter-grade silicon carbide and submicron-grade silicon carbide according to a weight ratio of (5-20):1. Carbon fibers are adopted to prepare the composite ceramic material, and at the same time, silicon carbide with different particle sizes are reasonably compounded, so the high temperature flexural strength of the ceramic material is effectively improved, compared with the prior art. Furthermore, the composite ceramic material can be repeatedly used, disposable material solid wastes (quartz crucible, eg.) are greatly reduced; and in the whole composite material system, no oxygen exists, so oxygen will not react with silicon liquid during the application process, and the product quality is improved. At the same time, the characteristics of the composite ceramic material such as long service life, oxygen-free property, and the like, can promote the development of technologies of monocrystal continuous feeding and pseudo-single crystal.
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