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:
Nov. 07, 2023
Filed:
Jul. 07, 2023
Lanzhou Institute of Chemical Physics, Cas, Lanzhou, CN;
Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai, CN;
Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai, CN;
Lujie Wang, Lanzhou, CN;
Zhuhui Qiao, Lanzhou, CN;
Tongyang Li, Lanzhou, CN;
Ziyue Wang, Lanzhou, CN;
Yuan Yu, Lanzhou, CN;
Huaguo Tang, Lanzhou, CN;
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 %.