Non-dense sintered ceramic molded body having at least two layers

US11034051B2 · kind B2 · utility

Assignee

• Vita Zahnfabrik H. Rauter GmbH & Co. KG · DE

Inventors

• Michael Tholey · Bad Säckingen, DE
• Michael Dorn · Frick, CH
• Michael Gödiker · Clingen, DE
• Norbert Thiel · Annaberg-Buchholz, DE

Key dates

• Filing date: Jul 8, 2019
• Grant date: Jun 15, 2021
• Expiry date: Jul 10, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24997
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer. The body has a color gradient and maintains dimensional stability during sintering and forming. An admixing component and a common sintering temperature are used to control the volume decrease of the layers during sintering.