Glass-ceramic having at least two crystal phases, process for producing a glass-ceramic and its use

US8772188B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Martin Letz · Mainz, DE
• Stephan Knoener · Herford, DE
• Martina Dressler · Mainz, DE
• Daniela Seiler · Alzey, DE
• Bernd Hoppe · Ingelheim am Rhein, DE
• Michael Kluge · Ludwigshafen, DE

Key dates

• Filing date: Mar 12, 2012
• Grant date: Jul 8, 2014
• Expiry date: Mar 12, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/0054
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass-ceramic having at least two crystal phases, wherein at least one crystal phase has a positive temperature dependence of the resonance frequency τf, at least one crystal phase has a negative temperature dependence of the resonance frequency τf and the glass-ceramic has a resulting temperature dependence of the resonance frequency τf of 0 ppm/K with a maximum deviation of +/−20 ppm/K, is described. Furthermore, a process for producing such a glass-ceramic and the use of the glass-ceramic are described.