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Production of optical glass and colour glass under low-temperature

A colored glass, glass technology, applied in glass forming, optics, optical components, etc., can solve problems such as difficulties

Inactive Publication Date: 2003-04-02
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the sintering process, it is especially difficult to make objects with complex shapes

Method used

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  • Production of optical glass and colour glass under low-temperature

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Embodiment Construction

[0026] First, according to the method of the present invention, the method of manufacturing a green body of colored glass is described with examples, wherein CdS is used as the MX dopant.

[0027] In this example, KOH, H 3 BO 3 , ZnO, KHF 2 , SiO 2 As a raw material, CdS or other colorants are used as dopants.

[0028] Raw materials KOH, H 3 BO 3 , ZnO, KHF 2 , CdS or other colorants and SiO 2 are dissolved or dispersed in water with stirring in the appropriate order. If necessary, the raw materials can also be stirred by means of ultrasound or additives can also be added to the suspension in order to facilitate the dispersion and dissolution of the different raw materials.

[0029] The completed suspension is poured into molds where it solidifies while drying in air at up to 100°C for 1 to 96 hours. After demoulding, the green body is dried at room temperature for 1-96 hours, and then dried at 40-400° C. for 1-48 hours.

[0030] Sintering to form the liquid phase of...

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Abstract

The invention relates to a method for manufacturing optical glasses and coloured glasses with the aid of a fluid phase sintering process from a basic material encompassing at least SiO2 powder as well as additives for reducing the temperature of the fluid phase sintering and / or melting process encompassing the following steps: the starting materials are dissolved in any sequence in a fluid medium to produce a solution as far as is possible and a suspension to the extent that they are not dispersed in solution; a greenbody is produced from the dissolved and dispersed starting materials; the greenbody is dried the dried greenbody is fluid-phase sintered at temperatures below 1200 DEG C, in particular in the temperature range from 600 DEG C to 1200 DEG C.

Description

technical field [0001] The present invention relates to a method for producing optical glass and / or colored glass using a sintering method or a melting method. The so-called sintering method refers to the viscosity value η> 1.10 8 dPa method. The so-called melting method refers to a product with a viscosity value η<1.10 2 dPa method. In particular, multicomponent glasses, especially colored glasses, can be produced in this way. Colored glass is colored by semiconductor doping MX, where M stands for Cd alone or Cd+Zn, and X stands for S, Se or Te. Background technique [0002] From the prior art, two main methods are known for the manufacture of glass by sintering: - the sol process, - the powder technique. [0003] A method of manufacturing glass according to the sol method is described in US 4,432,956. However, it only discusses the manufacturing method of processing quartz glass at a temperature of 1300-1500 °C. [0004] In order to take into account the remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22C03B8/00C03B8/02C03B19/06C03B19/12C03C1/00C03C3/089C04B35/16G02B1/00
CPCC03B2201/12C03B2201/30C03B19/12C03B2201/50C03C1/006C03B2201/10C03C3/089C03B2201/58
Inventor 约臣·弗罗因德莫尼卡·吉尔克尤维·科尔伯格鲁迪格·亨彻尔罗尔夫·克拉森
Owner SCHOTT AG