초록 ▼

A silicate optical glass article is made by forming a gel from a hydrolyzed silicon alkoxide. The resulting gel is molded, cured, dried, solvents removed, heated to form a dense glass having near net shape dimensions thereby reducing expensive polishing steps to obtain the desired final dimensions a

A silicate optical glass article is made by forming a gel from a hydrolyzed silicon alkoxide. The resulting gel is molded, cured, dried, solvents removed, heated to form a dense glass having near net shape dimensions thereby reducing expensive polishing steps to obtain the desired final dimensions and surface quality.

대표청구항 ▼

A method for making a near net shape silicate optical glass article comprising the following steps: Step 1－completely hyrdrolyzing silicon alkoxide in a solvent to form a solution having a molar ratio of silicon alkoxide to water in the range of about 1 to about 10; Step 2－partially removing from a

A method for making a near net shape silicate optical glass article comprising the following steps: Step 1－completely hyrdrolyzing silicon alkoxide in a solvent to form a solution having a molar ratio of silicon alkoxide to water in the range of about 1 to about 10; Step 2－partially removing from about 20 to about 60 volume percent of the solvent from the resulting solution of step 1 to form a concentrate; Step 3－transferring the product formed in step 2 into a mold; Step 4－completely polymerizing the product from step 3; Step 5－removing the remaining solvent from the product of step 4 to form a solid by supercritically drying said product of step 4; Step 6－removing the solid from step 5 from the mold; Step 7－sintering the product from step 6 to a density greater than 99% of theoretical obtainable density at a temperature equal to or less than 1150°C. to form a near net shape dense glass article having a near net shape deviation equal to or less than about 12 microns over 3 mm of surface.