Silicon nitride ceramic sintered body and preparation method thereof

US11807582B1 · kind B1 · utility

Assignees

• LANZHOU INSTITUTE OF CHEMICAL PHYSICS, CAS · CN
• Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering · CN
• Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing · CN

Inventors

• Lujie Wang · Lanzhou, CN
• Zhuhui Qiao · Yantai, CN
• Tongyang Li · Lanzhou, CN
• Ziyue Wang · Lanzhou, CN
• Yuan Yu · Yantai, CN
• Huaguo Tang · Yantai, CN

Key dates

• Filing date: Jul 7, 2023
• Grant date: Nov 7, 2023
• Expiry date: Jul 7, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed are a silicon nitride ceramic sintered body and a preparation method thereof. The silicon nitride ceramic sintered body has a content of a silicon nitride crystalline phase of not less than 98 wt %, a relative density of not less than 99%, a porosity of not larger than 1%, a grain boundary phase including Li, O, N, and Si elements, and a total content of C, F, Al, Mg, K, Ca, Na and rare-earth metals elements of less than 0.1 wt %.