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- W21905009 abstract "A sublimation method using the SiC seed crystal and SiC powder as the source material is commonly adopted to grow SiC bulk single crystal. However, it has proved to be difficult to achieve the high quality crystal and the process reliability because SiC single crystal should be grown at very high temperature in closed system. The present research was focused to improve SiC crystal quality grown by PVT method through using the new inner guide tube. The new inner guide tube was designed to prevent the enlargement of polycrystalline region into single crystalline region and to enlarge the diameter of SiC single crystal. The 6H-SiC crystals were grown by conventional PVT process. The seed adhered on seed holder and the high purity SiC source materials are placed on opposite side in sealed graphite crucible surrounded by graphite insulation. The SiC bulk growth was conducted around 2300 <TEX>$^{circ}C$</TEX> of growth temperature and 50 mbar in an argon atmosphere of growth pressure. The axial thermal gradient across the SiC crystal during the growth was estimated in the range of 15<TEX>${sim}$</TEX>20 <TEX>$^{circ}C$</TEX>/cm." @default.
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- W21905009 date "2008-09-01" @default.
- W21905009 modified "2023-10-17" @default.
- W21905009 title "The Diameter Expansion of 6H-SiC Single Crystals by the Modification of Inner Guide Tube" @default.
- W21905009 doi "https://doi.org/10.4313/jkem.2008.21.9.795" @default.
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