John J Kinney

US Patent:

48390496, Jun 13, 1989

Filed:

May 19, 1988

Appl. No.:

7/198449

Inventors:

John W. Kinney - New Richmond OH
John W. Graham - Cincinnati OH

Assignee:

Astro Met Associates, Inc. - Cincinnati OH

International Classification:

B01D 3920

US Classification:

2105101

Abstract:

An improved thermal shock resistant and generally thermal resistant ceramic composition is disclosed. The ceramic composition is compounded of aluminum oxide as a primary constituent with additives in a preferred form comprising zirconium oxide plus manganese oxide or titanium oxide, or both, interacted by exposure to high temperature. The additives increase the thermal shock resistance of the fired ceramic composition, with retention of elevated temperature strength properties. The ceramic compositions are prepared as high density solid shapes or as porous structures. The solid shapes formed into machine components show improved resistance to rapid thermal excursions, differential thermal gradients and elevated temperatures. Open cell ceramic foams of the ceramic composition are useful for hot filters, such as for filtering molten metal as well as in reaction supporting applications, where such ceramic foam structures are subject to rapid temperature and pressure transients.

US Patent:

47600381, Jul 26, 1988

Filed:

Nov 4, 1985

Appl. No.:

6/794956

Inventors:

John W. Kinney - New Richmond OH
John W. Graham - Cincinnati OH

Assignee:

Astro Met Associates, Inc. - Cincinnati OH

International Classification:

C04B 3502
C04B 3549

US Classification:

501105

Abstract:

An improved thermal shock resistant and generally thermal resistant ceramic composition is disclosed. The ceramic composition is compounded of aluminum oxide as a primary constituent with additives in a preferred form comprising zirconium oxide plus manganese oxide or titanium oxide, or both, interacted by exposure to high temperature. The additives increase the thermal shock resistance of the fired ceramic composition, with retention of elevated temperature strength properties. The ceramic compositions are prepared as high density solid shapes or as porous structures. The solid shapes formed into machine components show improved resistance to rapid thermal excursions, differential thermal gradients and elevated temperatures. Open cell ceramic foams of the ceramic composition are useful for hot filters, such as for filtering molten metal as well as in reaction supporting applications, where such ceramic foam structures are subject to rapid temperature and pressure transients.