Process for producing glass member
AssigneeSumitomo Electric Industries, Ltd.
InventorsHideo Kakuzen, Shiro Kurosaki, Yuichi Usui
Life of this patent
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Abstract
A process for producing a glass member includes subjecting a silicon, boron, phosphorous or aluminum compound or both a silicon, boron, phosphorous or aluminum compound and a dopant compound to vapor phase reaction to form a fine powder of fused silica, borate, phosphate or alumina or doped fused silica, borate, phosphate or alumina. Then the powder is partially sintered to form a porous glass body which subsequently is immersed in a solution containing a dopant compound thereby depositing the dopant compound on the surfaces of the pores in the glass body. Thereafter, the porous glass body is dried before the pores are collapsed to form the glass member.
Claims30
A process for producing a glass member which comprises
- (1) subjecting a silicon, boron, phosphorus or aluminum compound or both a silicon, boron, phosphorus or aluminum compound and a dopant compound to vapor phase reaction to form a fine powder of fused silica, borate, phosphate or alumina or doped fused silica, borate, phosphate or alumina;
- (2) partially sintering the powder in an inert gas, an anhydrous oxygen gas, chlorine gas, fluorine gas or in a vacuum to form a porous glass body;
- (3) immersing the porous glass body in a solution containing a dopant compound;
- (4) depositing the dopant command on the surfaces of the pores in the porous glass body;
- (5) drying the porous glass body in a vacuum, and then
- (6) collapsing the pores of the porous glass body in a vacuum, or in an oxygen or inert gas atmosphere free of moisture to produce the glass member.
Dependencies are inferred from the claim text.