The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2003
Filed:
Mar. 21, 2002
Waltraud Werdecker, Hanau, DE;
Udo Gertig, Johannesberg, DE;
Johann Leist, Altenstadt, DE;
Rainer Koeppler, Seligenstadt, DE;
Heraeus Quarzglas GmbH & Co. KG., Hanau, DE;
Abstract
Composite material with high resistance to temperature changes and a high density, and having an SiO -containing matrix with quartz glass grains embedded therein is produced by preparing a suspension from a particle mixture of finely divided SiO powder having at least two different particle fractions and of the quartz glass grains, forming a green compact and sintering the compact. The matrix has an SiO content of at least 99% by wt. and is formed from at least first and second particle fractions, each of which is present as granules of nanoscale, amorphous, synthetically produced SiO primary particles having a mean primary particle size of less than 100 nm. The composite material has an SiO -containing matrix with an SiO content of at least 99% by wt. It is particularly suited for applications such as starting material for producing a permanent mold for melting solar silicon.