Title:
不活性ガスの置換方法、及び不活性ガスの置換方法を用いたセラミック構造体の製造方法
Document Type and Number:
Japanese Patent JP6622323
Kind Code:
B2
Abstract:
An inert gas substituting method includes: a closing step of accommodating a honeycomb formed body in an indoor space of a gas substituting chamber and closing the same with airtightness from the outside being maintained; a pressure reducing step of reducing the pressure in the indoor space to a preset first vacuum pressure; a pressure increasing step of introducing argon gas into the pressure-reduced indoor space and increasing the pressure to a second vacuum pressure which is higher than the first vacuum pressure and lower than atmospheric pressure; a pressure re-reducing step of reducing the pressure to the first vacuum pressure again; and a pressure recovering step of repeating the pressure increasing step and the pressure re-reducing step at least twice, introducing argon gas into the indoor space in which the pressure has been reduced to the first vacuum pressure again, and recovering the pressure to atmospheric pressure.
Inventors:
Akira Ihara
Takashi Goto
Yoshiyuki Kamei
Takashi Goto
Yoshiyuki Kamei
Application Number:
JP2017552718A
Publication Date:
December 18, 2019
Filing Date:
November 25, 2016
Export Citation:
Assignee:
Nippon Insulator Co., Ltd.
International Classes:
C04B35/64; C04B35/565; F27B9/04; F27B9/40; F27D7/06; F27D19/00
Domestic Patent References:
| JP60065766A | ||||
| JP2002256306A | ||||
| JP2007238409A | ||||
| JP2002318081A |
Attorney, Agent or Firm:
Ippei Watanabe
Shigeru Koike
Shigeru Koike