Powder for black zirconia sintered body, production method...

Details Powder for black zirconia sintered body, production method... Powder for black zirconia sintered body, production method...

2007-05-14

2009-06-30

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Refractory

C501S103000, C106S459000, C106S480000

Reexamination Certificate

active

07553789

ABSTRACT:
A zirconia-containing powder including 2 to 6 weight % of a pigment which has a spinel structure represented by the chemical formula (Co1-xZnx)(Fe1-yAly)2O4(0≦x≦0.5, 0<y≦0.5) or which is a coprecipitated material containing Co, Zn, Fe, and Al and has the same spinel structure after calcination, 0.05 to 6 weight % of Al2O3, and 3.60 to 7.10 weight % of Y2O3; and a black zirconia sintered body obtained by sintering the zirconia-containing powder within a temperature range of 1300 to 1500° C.

REFERENCES:
patent: 5326519 (1994-07-01), Claussen
patent: 5711906 (1998-01-01), Briod
patent: 0 140 638 (1985-05-01), None
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patent: 3010236 (2000-02-01), None
patent: 3714563 (2005-11-01), None
patent: 2006-342036 (2006-12-01), None
patent: WO 2004/048290 (2004-06-01), None
Extended European Search Report dated Sep. 24, 2007, issued in corresponding European Patent Application No. 07 10 8325.

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