Higly durable silica glass, process and apparatus for producing same, and member and apparatus provided with same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Feb 27, 2003
app pub date -
Mar 26, 2002
filing date -
Mar 26, 2001
priority date (Note) -
Abandoned
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Abstract
Highly durable silica glass containing 0.01% to 2% by weight of at least one element selected from magnesium, calcium, strontium, barium, yttrium, hafnium and zirconium. The silica glass is produced by melting a powdery material comprising a finely divided silica powder and a finely divided zirconium-containing substance by oxyhydrogen flame or plasma arc to form an accumulated molten material layer, and extending the molten material layer outwardly in radial directions.
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