会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明专利
    • Crucible for the crystallization of silicon
    • ZA200711056B
    • 2009-04-29
    • ZA200711056
    • 2006-06-30
    • VESUVIUS CRUCIBLE CO
    • GILBERT RANCOULE
    • C30B20090101
    • The invention relates to a crucible for the crystallization of silicon and to the preparation and application of release coatings for crucibles used in the handling of molten materials that are solidified in the crucible and then removed as ingots, and more particularly to release coatings for crucibles used in the solidification of polycrystalline silicon. The objective of the inventor was to provide a crucible which does not require the preparation of a very thick coating at the end user facilities, which is faster and cheaper to produce and which presents an improved release effect and which allows the production of silicon ingot without cracks. It has now been found that these problems can be solved with a crucible for the crystallization of silicon comprising a) a base body comprising a bottom surface and side walls defining an inner volume; b) a substrate layer compnsing 80 to 100 wt. % of silicon nitride at the surface of the side walls facing the inner volume c) an intermediate layer comprising 50 to 100 wt. % of silica on the top of the substrate layer; and d) a surface layer comprising 50 to 100 wt. % of silicon nitride, up to 50 wt. % of silicon dioxide and up to 20 wt % of silicon on the top of the intermediate layer.