US Patent No. 10,462,850

METHOD OF MANUFACTURING CERAMIC SINTERED BODY, CERAMIC SINTERED BODY, AND CERAMIC HEATER


Patent No. 10,462,850
Issue Date October 29, 2019
Title Method Of Manufacturing Ceramic Sintered Body, Ceramic Sintered Body, And Ceramic Heater
Inventorship Satoshi Hirano, Kanagawa (JP)
Toshihiro Tachikawa, Kanagawa (JP)
Junichi Miyahara, Kanagawa (JP)
Toshihiko Hanamachi, Kanagawa (JP)
Assignee NHK Spring Co., Ltd., Yokohama-shi (JP)

Claim of US Patent No. 10,462,850

1. A method of manufacturing a ceramic sintered body, comprising:a film forming step of forming, on a surface of a heat-resistant metal material which is molybdenum or a molybdenum alloy, a metal coating film made of titanium, tantalum, or zirconium which is a metal material having a standard free energy of formation of metal carbides lower than that of the heat-resistant metal material;
a molding step of disposing the heat-resistant metal material provided with the coating film in the film forming step at a predetermined position in powder that serves as a starting material of a ceramic base, and molding a ceramic green body by press-molding the powder; and
a sintering step of generating a ceramic sintered body by sintering the ceramic green body molded in the molding step;
wherein the metal coating film suppresses a carbonization reaction of the heat-resistant metal material during the sintering.