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1. 发明授权

US4072489A Vacuum process for avoiding devitrification damage to transparent slip-cast silica crucibles 失效
标题翻译：用于避免透明滑石粉坩埚失透的真空过程
公开(公告)号：US4072489A
公开(公告)日：1978-02-07
申请号：US684730
申请日：1976-05-10
申请人： Ted A. Loxley , Walter G. Barber , Walter W. Combs , John M. Webb
发明人： Ted A. Loxley , Walter G. Barber , Walter W. Combs , John M. Webb
IPC分类号： C03B19/06 , C04B35/14 , C03B23/20 , C03B32/00
CPC分类号： C04B35/14 , C03B19/06 , C03B19/066 , C03B20/00 , Y10S65/04 , Y10S65/08 , Y10S65/13
摘要： A process is disclosed for making vitreous silica crucibles of exceptional high quality for use in the growing of a silicon crystal from molten silicon. The crucibles are formed from fine particles of high purity fused silica by slip casting or other suitable process, are dried and fired to provide a rigid porous body, and are thereafter sintered to a high density, preferably to the transparent state. The invention solves the problem of spalling, blistering and cracking during crystal growing and the resulting contamination of the molten silicon, which has long plagued the industry, by eliminating water from the fused silica particles before the porous body is sintered to the transparent state. Said body is thoroughly dried in a vacuum furnace at a high temperature and at a sub-atmospheric pressure low enough to remove the chemically bound water which cannot be removed by heat alone. The crucibles of this invention retain their transparency and high quality without spalling or introducing microscopic particles of silica into the silicon, thereby making it possible to grow a silicon crystal of highest quality without dislocations and imperfections due to contamination by said particles.
摘要翻译：公开了一种制造用于从熔融硅生长硅晶体的高品质的玻璃状石英坩埚的方法。坩埚由高纯度熔融二氧化硅的细颗粒通过滑移浇铸或其它合适的方法形成，被干燥和烧制以提供刚性多孔体，然后烧结成高密度，优选至透明状态。本发明通过在将多孔体烧结至透明状态之前从熔融二氧化硅颗粒中除去水分，解决了在晶体生长过程中产生剥落，起泡和开裂以及长期困扰工业的熔融硅的污染问题。所述体在真空炉中在高温和低于足够大的低于大气压的气压下彻底干燥，以除去不能单独加热除去的化学结合水。本发明的坩埚保持其透明性和高质量，而不会将硅石的微小颗粒剥落或引入到硅中，从而使得可以生长最高质量的硅晶体，而不会由于所述颗粒的污染而发生位错和缺陷。

2. 发明授权

US3972704A Apparatus for making vitreous silica receptacles 失效
标题翻译：二氧化硅玻璃容器制造装置
公开(公告)号：US3972704A
公开(公告)日：1976-08-03
申请号：US495129
申请日：1974-08-05
申请人： Ted A. Loxley , Walter G. Barber , Walter W. Combs , John M. Webb
发明人： Ted A. Loxley , Walter G. Barber , Walter W. Combs , John M. Webb
IPC分类号： C03B19/06 , C04B35/14 , C03B29/00
CPC分类号： C04B35/14 , C03B19/06 , C03B19/066 , C03B20/00 , Y10S65/04 , Y10S65/08 , Y10S65/13
摘要： Apparatus is disclosed for automated mass production of precision transparent silica glass products in accordance with a unique process in which slip-cast fused silica articles are rapidly heated and sintered in a vacuum or in a helium or hydrogen atmosphere at high temperatures, such as 2950.degree. to 3150.degree.F. A heated graphite susceptor shaped to conform to the outer surface of the fused silica article is automatically moved between a cooling zone and an induction furnace chamber which is opened momentarily to admit the article. The furnace and the graphite susceptor are designed to cause the trapped gases in the article to move radially outwardly and to effect rapid heating so as to avoid substantial devitrification during sintering.
摘要翻译：公开了用于根据独特的方法自动批量生产精密透明石英玻璃产品的装置，其中将滑移熔融石英制品快速加热并在真空中或在诸如2950℃的高温下的氦或氢气氛中烧结到3150°F。加热的石墨基座，其形状适合熔融石英制品的外表面，在冷却区和立即打开以容纳制品的感应炉室之间自动移动。炉和石墨感受器被设计成使制品中的被捕获的气体径向向外移动并实现快速加热，以避免在烧结过程中发生大量的失透。

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