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    • 9. 发明授权
    • Quartz glass crucible for pulling a single crystal
    • 石英玻璃坩埚拉单晶
    • US5306473A
    • 1994-04-26
    • US828737
    • 1992-01-31
    • Toshio NakajimaYuji HayashiSatoru TachibanaKazuhiko Takariki
    • Toshio NakajimaYuji HayashiSatoru TachibanaKazuhiko Takariki
    • C03B19/09C03C3/06C03C11/00C30B15/10B01D9/00
    • C03B19/095C03C11/00C03C3/06C30B15/10C03C2204/06Y02P40/57Y10S117/90Y10T117/1032
    • A quartz glass crucible for pulling a single crystal, which comprises a cylindrical straight portion, a bottom portion and a curved intermediate portion for connecting the straight portion and the bottom portion. The straight portion has an opaque area positioned within about 75% or less of the total height of the crucible, measured from the upper open end of the crucible. The opaque area in the straight portion has a total bubble volume which ranges from about 7.times.10.sup.-3 cm.sup.3 /cm.sup.3 to 30.times.10.sup.-3 cm.sup.3 /cm.sup.3. The remaining straight portion, the curved intermediate portion and the bottom portion consist of two layers. One layer is an inner transparent layer having a total volume of bubbles of about 4.times.10.sup.-3 cm.sup.3 /cm.sup.3 or less and corresponds to from about 20% to 60% of the thickness of the crucible, measured from the inside surface thereof. The other layer is an outer opaque layer having a total volume of bubbles ranging between about 7.times.10.sup.-3 cm.sup.3 /cm.sup.3 and 30.times.10.sup.-3 cm.sup.3 /cm.sup.3, which is integral with the opaque area of the upper part of the straight portion.
    • 一种用于拉出单晶的石英玻璃坩埚,其包括圆柱形直线部分,底部部分和用于连接直线部分和底部部分的弯曲中间部分。 直线部分具有位于坩埚的总高度的约75%或更小的不透明区域内,从坩埚的上部开口端测量。 直线部分中的不透明区域的总气泡体积为约7×10 -3 cm 3 / cm 3至30×10 -3 cm 3 / cm 3。 剩余的直线部分,弯曲的中间部分和底部部分由两层组成。 一层是从其内表面测量的总体积为约4×10 -3 cm 3 / cm 3以下的气泡的内部透明层,并且相当于坩埚厚度的约20%至60%。 另一层是外部不透明层,其具有在约7×10 -3 cm 3 / cm 3和30×10 -3 cm 3 / cm 3之间的总体积的气泡,其与直线部分的上部的不透明区域成一体 。