Quartz glass manufacturing method using hydrogen obtained by vaporizing liquid hydrogen
US-9527764-B2 · Dec 27, 2016 · US
Method for producing synthetic quartz glass
US8997528B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8997528-B2 |
| Application number | US-201213684381-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 23, 2012 |
| Priority date | Nov 25, 2011 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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Abstract
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A known method for producing synthetic quartz glass comprises the method steps of: forming a stream of a SiO 2 feedstock material which contains octamethylcyclotetrasiloxane (D4) as the main component which has a reference molecular mass assigned to it, feeding the stream to a reaction zone in which the feedstock material is converted under formation of amorphous SiO 2 particles by pyrolysis or hydrolysis into SiO 2 , depositing the amorphous SiO 2 particles on a deposition surface while forming a porous SiO 2 soot body, and vitrifying the SiO 2 soot body while forming the synthetic quartz glass. Starting therefrom, to enable the production of large-volume cylindrical soot bodies with outer diameters of more than 300 mm of improved material homogeneity, it is suggested according to the invention that the feedstock material contains additional components in the form of further polyalkylsiloxanes, wherein light polyalkylsiloxanes with a relative molecular mass of less than the reference molecular mass are contained with a weight fraction of at least 50 ppm, and heavy polyalkylsiloxanes with a relative molecular mass of more than the reference molecular mass are contained with a weight fraction of at least 30 ppm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing synthetic quartz glass, said method comprising: (A) providing a liquid SiO 2 feedstock material, which contains more than 60% by wt. of octamethylcyclotetrasiloxane (D4), (B) vaporizing the liquid SiO 2 feedstock material into a gaseous SO 2 feedstock vapor, (C) converting the gaseous SiO 2 feedstock vapor into SiO 2 particles, (D) depositing the gaseous SiO 2 particles on a deposition surface so as to form a SiO 2 s…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C03B37/01413Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8997528B2 cover?
- A known method for producing synthetic quartz glass comprises the method steps of: forming a stream of a SiO 2 feedstock material which contains octamethylcyclotetrasiloxane (D4) as the main component which has a reference molecular mass assigned to it, feeding the stream to a reaction zone in which the feedstock material is converted under formation of amorphous SiO 2 particles by pyrolysis …
- Who is the assignee on this patent?
- Heraeus Quarzglas
- What technology area does this patent fall under?
- Primary CPC classification C03B37/01413. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).