Sintering aid for glasses for machinable phyllosilicate based structures

US11225433B2 · kind B2 · utility

Assignee

• Ferro Corporation · US

Inventors

• Srinivasan Sridharan · Strongsville, US
• George E. Sakoske · Washington, US
• John J. Maloney · South Burlington, US
• Cody J. Gleason · Solon, US
• Gregory R. Prinzbach · Brecksville, US
• Bradford Smith · North Ridgeville, US
• Chih-Cheng Wang · Hsinchu, TW

Key dates

• Filing date: Dec 2, 2016
• Grant date: Jan 18, 2022
• Expiry date: Nov 5, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/5292
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A sintered machinable glass-ceramic is provided. The machinable glass-ceramic is formed by mixing phyllosilicate material having a sheet structure, with a glass fit and firing the mixture at relatively low temperatures to sinter the phyllosilicate, while maintaining the sheet-like morphology of the phyllosilicate and its associated cleaving properties. The sintered machinable glass-ceramic can be machined with conventional metal working tools and includes the electrical properties of the phyllosilicate. Producing the sintered machinable glass-ceramic does not require the relatively high-temperature bulk nucleation and crystallization needed to form sheet phyllosilicate phases in situ.