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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:
Feb. 13, 2024
Filed:
May. 12, 2021
Ngk Insulators, Ltd., Nagoya, JP;
Ngk Electronics Devices, Inc., Mine, JP;
Yuji Umeda, Mine, JP;
Jyunji Oogami, Mine, JP;
NGK INSULATORS, LTD., Nagoya, JP;
NGK ELECTRONICS DEVICES, INC., Mine, JP;
Abstract
In a ceramic sintered body, the Zr content is 17.5 mass %-23.5 mass % in terms of ZrO, the Hf content is 0.3 mass %-0.5 mass % in terms of HfO, the Al content is 74.3 mass %-80.9 mass % in terms of AlO, the Y content is 0.8 mass %-1.9 mass % in terms of YO, the Mg content is 0.1 mass %-0.8 mass % in terms of MgO, the Si content is 0.1 mass %- and 1.5 mass % in terms of SiO, and the Ca content is 0.03 mass %-0.35 mass % in terms of CaO. The total content of Na and K is 0.01 mass %-0.10 mass %, when the K content is converted to KO and the Na content is converted to NaO. The balance content is 0.05 mass % or less in terms of oxide.