High-purity quartz powder, process for producing the same,...

Details High-purity quartz powder, process for producing the same,... High-purity quartz powder, process for producing the same,...

2006-06-20

2006-06-20

Sample, David (Department: 1755)

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C423S338000, C501S054000, C501S133000, C501S154000

Reexamination Certificate

active

07063826

ABSTRACT:
Subjects for the invention are to obtain a quartz powder having a high purity and high quality and a process for producing the same and to obtain a glass molding formed by melting and molding the powder and extremely reduced in bubble inclusion.The invention provides a quartz powder, preferably a synthetic quartz powder obtained by the sol-gel method, which, upon heating from room temperature to 1,700° C., generates gases in which the amount of CO is 300 nl/g or smaller and the amount of CO2is 30 nl/g or smaller.

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