JP2002201041A5

JP2002201041A5 -

Info

Publication number: JP2002201041A5
Application number: JP2001300802A
Authority: JP
Filing date: 2001-09-28
Publication date: 2005-09-29

Claims

In a method for producing a glass molded product, in which a heated glass is press-molded in a non-oxidizing atmosphere to produce a molded product,
Press-molding glass containing at least one oxide selected from WO ₃ , Nb ₂ O ₅ and TiO ₂ to produce a glass molded article, and then heat-treating the glass molded article in an oxidizing atmosphere A method for producing a glass molded product characterized by the above.

The method for producing a glass molded article according to claim 1, wherein the glass contains P ₂ O ₅ .

The method for producing a glass molded article according to claim 1 or 2, wherein the press molding is precision press molding in which the shape of the molding die molding surface is transferred to glass and molded into a final product shape.

In a method for producing a glass molded product, in which a heated glass is press-molded in a non-oxidizing atmosphere to produce a molded product,
P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ A glass molded article is produced by precision press-molding a glass containing at least one oxide selected from the above, and then heat-treating the glass molded article in an oxidizing atmosphere. Method.

The method for producing a glass molded article according to any one of claims 1 to 4, wherein the atmosphere in the heat treatment is a dry atmosphere.

The water vapor partial pressure in the atmosphere in the heat treatment is 10 ^4Four It is Pa or less, The manufacturing method of the glass molded product of any one of Claims 1-4.

The manufacturing method of the glass molded product of any one of Claims 1-6 which press-mold by reheating the glass shape | molded by the shaping | molding preform.

In a method for producing a glass molded product, in which a heated glass is press-molded in a non-oxidizing atmosphere to produce a molded product,
P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ A preform comprising a glass containing at least one oxide selected from the above and having a carbon film formed on the surface thereof is precision press-molded to produce a glass molded article, and then the glass molded article is heat-treated in the air A method for producing a glass molded product.

The manufacturing method of the glass molded article of any one of Claims 1-8 which heat-processes glass at the temperature below the glass transition temperature.

The material for the pressing mold forming surface used for press molding is any one selected from silicon carbide, WC, hard carbon, and noble metals. Manufacturing of a glass molded article according to any one of claims 1 to 9 Method.

The manufacturing method of the glass molded product of any one of Claims 1-10 which press-molds glass whose glass transition temperature (Tg) is 540 degrees C or less.

The production of a glass molded article according to any one of claims 1 to 11 , wherein a glass molded article made of optical glass having a refractive index (nd) of 1.6 or more and an Abbe number (νd) of 33 or less is produced. Method.

Optical glass is P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ At least one oxide selected from the above (but not including lead, WO _3Three And Nb ₂₂ O _5Five The manufacturing method of the glass molded article of Claim 12 which is what contains 15 mol% or more of the total content of.

Optical glass is P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ At least one oxide selected from the above (but not including lead, WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ The method for producing a glass molded article according to claim 12, wherein the total content of A is 25 mol% or more.

By _{_{mol%, P 2 O 5 12~50%,}} WO 3 2~45%, Nb 2 O 5 0~25%, TiO 2 0~22%, Li 2 O 0~30%, Na 2 O 0~ 33%, K ₂ O 0-25%, B ₂ O ₃ 0-23%, BaO 0-25% and ZnO 0-20%, and the total content of WO ₃ and Nb ₂ O ₅ is 45% or less manufacturing method of a glass molded article according to any one of claims 1 to 12 for producing a molded article comprising glass.

By mol%, Li ₂ O 2 to 30% and a manufacturing method of a glass molded article according to claim 15 for producing a glass or Ranaru molded article comprising a Na ₂ O 2 to 33%.

In terms of mol%, Nb ₂ O ₅ 5-25%, TiO ₂ 1-22%, B ₂ O ₃ 0.5-23% and BaO 1-25%, and the total content of alkali metal oxides The manufacturing method of the glass molded product of Claim 15 or 16 which produces the molded product which consists of glass whose total content of an alkaline-earth metal oxide and ZnO is 45% or less at 45% or less.

Glass Li ₂ O 9 to 30 manufacturing method of a glass molded article according to any one of claims 1 to 17 but containing mol%.

The glass according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17 or 18, wherein the glass is a PbO-free glass. Manufacturing method of molded products.

Glass is Sb ₂₂ O _3Three And As ₂₂ O _3Three The method for producing a glass molded article according to any one of claims 1 to 19, wherein each of the components contains 2000 ppm or less.

Glass is As ₂₂ O _3Three 21. The method for producing a glass molded article according to any one of claims 1 to 20, wherein the glass molded article is contained in an amount of 200 ppm or less.

The method for producing a glass molded article according to any one of claims 1 to 21, wherein the glass molded article is a glass optical element.

In glass preforms that are heated, precision press molded and processed into optical elements,
The precision press molding is performed in a non-oxidizing atmosphere,
The optical element is heat treated in an oxidizing atmosphere after precision press molding; and
The glass forming the glass preform is P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ A glass preform comprising an optical glass containing at least one oxide selected from the group consisting of:

The glass preform according to claim 23, wherein the glass forming the glass preform has a refractive index (nd) of 1.6 or more and an Abbe number (νd) of 33 or less.

The glass that forms the glass preform is P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ At least one oxide selected from the above (but not including lead, WO _3Three And Nb ₂₂ O _5Five The glass preform according to claim 24, comprising a total content of at least 15 mol%.

The glass that forms the glass preform is P ₂₂ O _5Five And WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ At least one oxide selected from the above (but not including lead, WO _3Three , Nb ₂₂ O _5Five And TiO ₂₂ The glass preform according to claim 24, comprising a total content of at least 25 mol%.

The glass that forms the glass preform is Sb ₂₂ O _3Three And As ₂₂ O _3Three The glass preform according to any one of claims 23 to 25, wherein each of the glass preform contains 2000 ppm or less.

An optical element manufactured by the method according to any one of claims 1 to 21 .

A method for treating glass, characterized in that a colored glass containing at least one oxide of WO ₃ and Nb ₂ O ₅ is heat-treated in an oxidizing dry atmosphere for decolorization.

The glass processing method according to claim 29, wherein the colored glass is processed to obtain a glass optical element.

A glass processing method characterized by coloring a glass containing at least one oxide selected from WO ₃ , Nb ₂ O ₅ and TiO ₂ by heat treatment in a non-oxidizing atmosphere.