Method for producing oriented sintered body

Patent metadata

Field	Value
Publication number	US-2018237343-A1
Application number	US-201815956898-A
Country	US
Kind code	A1
Filing date	Apr 19, 2018
Priority date	Nov 16, 2015
Publication date	Aug 23, 2018
Grant date	—

Abstract

A method for producing an oriented sintered body according to the present invention includes the steps of: (a) preparing a multilayer body, the multilayer body including a layer including a fine raw-material powder and a layer including a plate-like raw-material powder which are alternately stacked each other, particles of the plate-like raw-material powder being arranged such that surfaces of the particles of the plate-like raw-material powder extend along a surface of the layer including a fine raw-material powder; and (b) sintering the multilayer body.

First claim

What is claimed is:

1 . A method for producing an oriented sintered body comprising the steps of:
(a) preparing a multilayer body, the multilayer body including a layer including a fine raw-material powder and a layer including a plate-like raw-material powder which are alternately stacked each other, particles of the plate-like raw-material powder being arranged such that surfaces of the particles of the plate-like raw-material powder extend along a surface of the layer including a fine raw-material powder; and (b) sintering the multilayer body.

2 . The method for producing an oriented sintered body according to claim 1 , wherein a coverage at which the surface of the layer including a fine raw-material powder is covered with the plate-like raw-material powder is 1% to 60%.

3 . The method for producing an oriented sintered body according to claim 1 , wherein the layer including a fine raw-material powder has a thickness of 5 to 100 μm.

4 . The method for producing an oriented sintered body according to claim 1 , wherein, in the step (a), a single-side processed body including a compact of the fine raw-material powder and the layer including the plate-like raw-material powder, the layer covering one of surfaces of the compact, is prepared, and the multilayer body is prepared using the single-side processed body.

5 . The method for producing an oriented sintered body according to claim 4 , wherein the single-side processed body is prepared by stacking a compact of the plate-like raw-material powder on the one of surfaces of the compact of the fine raw-material powder, the compact of the plate-like raw-material powder having a smaller thickness than the compact of the fine raw-material powder, or by applying a dispersion liquid containing the plate-like raw-material powder on the one of surfaces of the compact of the fine raw-material powder by printing method, spray coating method, spin coating method, or dip coating method.

6 . The method for producing an oriented sintered body according to claim 1 , wherein, in the step (a), a double-side processed body including a compact of the fine raw-material powder and the particles of the plate-like raw-material powder, the particles being arranged on both of surfaces of the compact such that the surfaces of the particles extend along a corresponding one of the surfaces of the compact, is prepared, and the multilayer body is prepared using the double-side processed body and the compact that has not been processed.

7 . The method for producing an oriented sintered body according to claim 6 , wherein the double-side processed body is prepared by stacking a compact of the plate-like raw-material powder on both of the surfaces of the compact of the fine raw-material powder, the compact of the plate-like raw-material powder having a smaller thickness than the compact of the fine raw-material powder, or by applying a dispersion liquid containing the plate-like raw-material powder on both of the surfaces of the compact of the fine raw-material powder by printing method, spray coating method, spin coating method, or dip coating method.

8 . The method for producing an oriented sintered body according to claim 1 , wherein, in the step (b), the multilayer body is sintered under pressure.

9 . The method for producing an oriented sintered body according to claim 1 , wherein a principal component of the fine raw-material powder and a principal component of the plate-like raw-material powder are both alumina.

Assignees

• Ngk Insulators Ltd

Inventors

• Sato Kei
• Maeda Takahiro
• Watanabe Morimichi
• Nanataki Tsutomu

Classifications

• C01F7/30

  Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds · CPC title

• C30B1/12 Primary

  by pressure treatment during the growth · CPC title

• C04B35/115 Primary

  Translucent or transparent products · CPC title

• C04B35/638

  Removal thereof · CPC title

• C01P2004/20

  extending in two dimensions, e.g. plate-like · CPC title