Ceramic member with fine protrusions on surface and method...

Details Ceramic member with fine protrusions on surface and method... Ceramic member with fine protrusions on surface and method...

2005-03-01

2005-03-01

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

C428S148000, C428S220000, C428S304400, C428S689000, C428S698000, C428S701000, C428S702000, C216S056000, C216S096000, C216S103000, C216S108000

Reexamination Certificate

active

06861122

ABSTRACT:
The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.

REFERENCES:
patent: 5582215 (1996-12-01), Yamamoto et al.
patent: 6340648 (2002-01-01), Imura et al.
patent: 10-45461 (1998-02-01), None
patent: 10-236871 (1998-09-01), None
patent: 411057355 (1999-03-01), None
patent: 11-231085 (1999-08-01), None
patent: 2000-191370 (2000-07-01), None
patent: 2000-281470 (2000-10-01), None
Schacht et al., “Corrosion of Alumina Ceramics in Acidic Aqueous Solutions at High Temperatures and Pressures,” 2000 Kluwer Academic Publishers, May 2000, pp. 6251-6258.

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