Highly durable silica glass, process and apparatus for producing same, and member and apparatus provided with same

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 zirconiu...

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Hauptverfasser: MIURA NAOKI, HARADA YOSHINORI, TAKAHASHI KATSUFUMI, KIYOHARA HIDEKI, KUDOH MASAKAZU, MIZUTANI SHUZO, HASHIMOTO SHINKICHI
Format: Patent
Sprache:eng
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Zusammenfassung: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 are to form an accumulated molten material layer, and extending the molten material layer outwardly in radial directions.