Diffuser material of synthetically produced quartz glass and method for the manufacture of a molded body consisting fully or in part thereof

US11390556B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Gerrit Scheich · Seligenstadt, DE
• Frank Nuernberg · Aschaffenburg, DE
• Andreas Goetzendorfer · Aschaffenburg, DE
• Nadine Tscholitsch · Hanau, DE
• Bernhard Franz · Regensburg, DE
• Ursula Klett · Hanau, DE
• Matthew Joseph DONELON · Chandler, US

Key dates

• Filing date: Feb 13, 2017
• Grant date: Jul 19, 2022
• Expiry date: Oct 15, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2203/54
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A diffuser material of synthetically produced, pore-containing quartz glass and a method for the manufacture of a molded body consisting fully or in part thereof. The diffuser material has a chemical purity of at least 99.9% SiO2, a cristobalite content of not more than 1%, and a density in the range of 2.0 to 2.18 g/cm3. Starting therefrom, to indicate a diffuser material which is improved with respect to diffuse reflectivity with Lambertian behavior over a wide wavelength range, high material homogeneity and UV radiation resistance, the quartz glass has a hydroxyl group content in the range of at least 200 wt. ppm and at least 80% of the pores have a maximum pore dimension of less than 20 μm.