Method for producing oriented ceramic sintered body and flat sheet

A technology for sintered body and ceramics, which is applied to the production method of oriented ceramic sintered body and the field of flat sheets, and can solve problems such as cracking of adhesive spacers.
CN111278792BActive Publication Date: 2022-07-19NGK INSULATORS LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NGK INSULATORS LTD
Publication Date
2022-07-19

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Abstract

The method for producing an oriented ceramic sintered body of the present invention includes the steps of: (a) producing a ceramic molded body before firing into an oriented ceramic sintered body; and (b) sandwiching the ceramic molded body with a pair of release sheets and placing the ceramic molded body in a hot press In the firing furnace, hot-press firing was performed while pressing the ceramic molded body with a pair of punches through a pair of release sheets, thereby obtaining an oriented ceramic sintered body. The release sheet was sandwiched by a PET film having a thickness of 75 μm and a surface arithmetic mean roughness Ra of 0.03 μm, and then placed on a stainless steel plate having a thickness of 10 mm and a surface arithmetic mean roughness Ra of 0.29 μm and performed Vacuum packing, at 200kg / cm 2 After isostatic pressing, the maximum cross-sectional height Pt of the cross-sectional curve of the surface of the release sheet opposite to the stainless steel plate side is 0.8 μm or less.
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Description

technical field

[0001] The present invention relates to a method for producing an oriented ceramic sintered body and a flat sheet. Background technique

[0002] As a firing method of ceramics, a hot pressing method is known in which firing is performed while pressurizing a ceramic powder or a ceramic molded body at a high temperature. When a ceramic is produced by a hot pressing method, a spacer is usually arranged between the samples in order to protect the samples and the pressed parts. In order to avoid stress concentration due to the difference in thermal expansion rate with other components, the spacer is mostly made of the same material as other components. For example, in general, all parts are made of graphite in an inert atmosphere, and all parts are made of alumina or silicon carbide in an oxidizing atmosphere. However, in this method, since the sample and the spacer are in direct contact, there is a problem that the sample and the spacer react, stick, or the spa...

Claims

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