ALUMINA POROUS BODY AND METHOD FOR MANUFACTURING SAME

Title:

ALUMINA POROUS BODY AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2013/187182

Kind Code:

A1

Abstract:

Provided are: an alumina porous body having comparatively high strength even when fired at a comparatively low temperature, and having comparatively high porosity and comparatively large pore diameter; and a method for manufacturing the alumina porous body. Aggregate alumina particles (16) are bonded to each other by Y2Si2O7 (yttrium silicate), which is a compound (22) synthetized from mullite or kaolinite, which is a Si compound (18), and yttria, which is a rare-earth oxide (20). Therefore, even in a case when alumina particles (16) having a relatively large particle size, for example, within a range of 15-50 µm, are sintered at a relatively low temperature, for example, a firing temperature of 1450°C, the alumina particles (16) are bonded using Y2Si2O7, obtaining a good bonding strength, and therefore an alumina porous body (10) can be obtained having relatively high average radial crushing strength (MPa), relatively high porosity (%), and relatively large average pore diameter (µm) even when fired at a relatively low temperature.

Inventors:

WATANABE HIROKAZU (JP)
BALAGOPAL N NAIR (JP)

Application Number:

PCT/JP2013/063858

Publication Date:

December 19, 2013

Filing Date:

May 17, 2013

Export Citation:

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Assignee:

NORITAKE CO LTD (JP)
WATANABE HIROKAZU (JP)
BALAGOPAL N NAIR (JP)

International Classes:

C04B38/00; C04B35/10; C04B41/87

Domestic Patent References:

WO2006035645A1

2006-04-06

Foreign References:

JP2012062232A	2012-03-29
JP2002234779A	2002-08-23
JP2006263498A	2006-10-05
JP2010208901A	2010-09-24
JP2010512302A	2010-04-22
JPH0521605B2	1993-03-25
JPH01317178A	1989-12-21
JPS62252381A	1987-11-04
JP2007268463A	2007-10-18

Other References: