Patent Number: 7,819,996

Title: Method of manufacturing ceramic sheet and method of manufacturing gas sensing element

Abstract: Methods of manufacturing a ceramic sheet and a gas sensing element are disclosed. At least ceramic powder, a binder and a plasticizer are blended and mixed in slurry. The slurry is formed into unfired green sheets, on which paste is printed. Each of the unfired green sheets has porosity greater than 5%. In the manufacturing methods, the unfired green sheets are pressurized with a pressure of 10 MPa at a temperature above 60.degree. C., after which the paste is printed on surfaces of the unfired green sheets. In the method of manufacturing the gas sensing element, a shielding layer, a porous diffusion resistance layer and the unfired green sheets for a sensing layer, a reference gas airspace forming layer and a heating layer are stacked to form a stacked ceramic body, whish is fired to obtain the gas sensing element.

Inventors: Yasuda; Eturo (Okazaki, JP), Kihara; Noriaki (Okazaki, JP), Makino; Daisuke (Ichinomiya, JP), Shirai; Makoto (Hekinan, JP), Mukai; Hirokatsu (Kuwana, JP), Ushikubo; Takumi (Kuwana, JP)

Assignee: Nippon Soken, Inc.

International Classification: C03B 29/00 (20060101); A61F 13/15 (20060101); B29C 65/00 (20060101); C04B 38/00 (20060101)

Expiration Date: 2018-10-26 0:00:00