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Preparation method of ultrahigh-purity quartz ceramic crucible
The invention mainly discloses an ultrahigh-purity quartz ceramic crucible and a preparation method thereof. The ultrahigh-purity quartz ceramic crucible is mainly applied to polycrystalline silicon ingots in the solar photovoltaic industry. The preparation method comprises the steps of treating solar-grade purity silica powder (6N) with different grain sizes, and then, adding silica sol, deionized water, additives and the like according to a certain ratio to prepare slurry with good dispersibility, wherein the solar-grade purity silica powder (6N) with different grain sizes is used as the main raw material; after further treating a common quartz crucible, placing the slurry on the inner surface of the common quartz crucible in a way of coating, brushing and the like; and after drying, oxidizing and sintering in a kiln with an oxidizing atmosphere to obtain the ultrahigh-purity quartz ceramic crucible. By using the preparation method, the ultrahigh-purity quartz ceramic crucible can be obtained, an ultrahigh-purity crucible is produced by breaking the bottleneck of an ultrahigh-purity quartz raw material, impurities are more effectively prevented from entering ingots, side red areas are thoroughly eliminated, bottom red areas are reduced, the conversion efficiency is increased, the cost is reduced while the stability is kept, the porosity is lower, the volume density is higher, the property is more stable, the service life is greatly prolonged, and the using cost is effectively reduced.
Preparation method of ultrahigh-purity quartz ceramic crucible
The invention mainly discloses an ultrahigh-purity quartz ceramic crucible and a preparation method thereof. The ultrahigh-purity quartz ceramic crucible is mainly applied to polycrystalline silicon ingots in the solar photovoltaic industry. The preparation method comprises the steps of treating solar-grade purity silica powder (6N) with different grain sizes, and then, adding silica sol, deionized water, additives and the like according to a certain ratio to prepare slurry with good dispersibility, wherein the solar-grade purity silica powder (6N) with different grain sizes is used as the main raw material; after further treating a common quartz crucible, placing the slurry on the inner surface of the common quartz crucible in a way of coating, brushing and the like; and after drying, oxidizing and sintering in a kiln with an oxidizing atmosphere to obtain the ultrahigh-purity quartz ceramic crucible. By using the preparation method, the ultrahigh-purity quartz ceramic crucible can be obtained, an ultrahigh-purity crucible is produced by breaking the bottleneck of an ultrahigh-purity quartz raw material, impurities are more effectively prevented from entering ingots, side red areas are thoroughly eliminated, bottom red areas are reduced, the conversion efficiency is increased, the cost is reduced while the stability is kept, the porosity is lower, the volume density is higher, the property is more stable, the service life is greatly prolonged, and the using cost is effectively reduced.
Preparation method of ultrahigh-purity quartz ceramic crucible
SUN JIAN (Autor:in) / XIE YAN (Autor:in) / MU RONGSHENG (Autor:in)
09.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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