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High thermal stability quartz glass component, its corresponding semi-finished product and its production method

A quartz glass, production method technology, applied in glass production, glass forming, glass manufacturing equipment and other directions, can solve problems such as mechanical weakening

Active Publication Date: 2022-07-12
HERAEUS QUARZGLAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In case of permanent temperature exposure, crystalline layers can also grow into the coating surface of the component, leading to mechanical weakening

Method used

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  • High thermal stability quartz glass component, its corresponding semi-finished product and its production method
  • High thermal stability quartz glass component, its corresponding semi-finished product and its production method
  • High thermal stability quartz glass component, its corresponding semi-finished product and its production method

Examples

Experimental program
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Effect test

Embodiment Construction

[0105] Preparation of SiO with Crystallization Promoter 2 Slurry

[0106] Amorphous quartz glass fine particles of natural raw material with a particle size ranging between 250 μm and 650 μm were mixed into the dispersion liquid (water). The quartz glass fines are first cleaned in a thermal chlorination process; care is taken to ensure that the cristobalite content is below 1 wt%.

[0107] This mixture was ground for a period of 3 days in a quartz glass lined drum mill using quartz glass grinding beads on a sliding roller at 23 rpm until a homogeneous slurry was formed. During the grinding process, the pH value due to the dissolved SiO 2 and reduced to about 4.

[0108] SiO obtained after grinding quartz glass fines 2 The fine-grained particles have a multi-sheet nature and show a D of about 8 μm 50 value and a D of about 40 μm 90 The value is the particle size distribution of the feature. SiO with a diameter of about 40 nm 2 Nanoparticles ("fumed silica") were added...

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Abstract

The present invention relates to a high thermal stability quartz glass component, its corresponding semi-finished product and its production method. In a known method for producing quartz glass components, a crystal-forming layer containing a crystallization promoter is produced on the coated surface of a base body of quartz glass. Starting from this, in order to provide a method for producing quartz glass components with improved thermal strength and long-term stability, which also show relatively little deformation, especially in the case of rapid heating processes, it is proposed according to the present invention Production of amorphous SiO containing average thicknesses in the range of 0.1 to 5 mm 2 Porous crystals of the particles form the layer, and cesium and / or rubidium containing species act as crystallization promoters.

Description

technical field [0001] The present invention relates to a quartz glass component with high thermal stability, which contains SiO containing SiO on the coating surface of a base body of quartz glass. 2 and a crystalline stabilization layer of dopants. [0002] Furthermore, the invention relates to a semi-finished product for the production of quartz glass components comprising a crystal-forming layer containing a crystallization accelerator on the coated surface of a base body of quartz glass. [0003] Furthermore, the invention relates to a method for producing quartz glass components with high thermal stability, in which a crystal-forming layer containing a crystallization promoter is produced on the coated surface of a base body of quartz glass. Background technique [0004] Quartz glass components are often used in manufacturing methods that require high purity. Here, the temperature stability of the quartz glass is a limiting factor. Due to the lower softening point o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B20/00C03C17/22
CPCC03B20/00C03C17/22C03B19/066C03B2201/50C03C17/007C03C2217/425C03C2217/45C03C2217/478C03B32/02C03C17/00C03C17/008
Inventor 克里斯蒂安·申克纳迪娜·彻利乔托马斯·拜耳
Owner HERAEUS QUARZGLAS