Molten and cast refractory product with high zirconia content

Details Molten and cast refractory product with high zirconia content Molten and cast refractory product with high zirconia content

2006-10-31

2006-10-31

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S104000, C501S107000, 65

Reexamination Certificate

active

07129192

ABSTRACT:
The invention concerns a refractory product comprising more than 85% of zirconia (ZrO2), characterized in that it comprises in wt. % with respect to oxides: ZrO2>92%, SiO2: 2 to 8%, Na2O: 0.12 to 1%, Al2O3: 0.2 to 2%, 0.5%≦Y2O3+CaO≦2.6%, with the proviso that Y2O3: 0.3 to 2% and that CaO: 0.5 to 1.93%.

REFERENCES:
patent: 5679612 (1997-10-01), Endo et al.
patent: 2000-302560 (2000-10-01), None
patent: 2039026 (1995-07-01), None
Patent Abstracts of Japan, vol. 2000, No. 13, Feb. 5, 2001 -&JP 2000 302560 A (Toshiba Monofrax Co Ltd), Oct. 31, 2000 Tableau 3, echantillon 5. abstract.
Database WPI, Section Ch, Week 197848, Derwent Publications Ltd., London, GB; AN 1978-86594A, XP002225519, -&JP 53 121012 A (Nippon Electric Glass Co), Oct. 23, 1978 Tableau 1, echantillons 2 et 3. abstract.
Database CA Online!, Chemical Abstracts Service, Columbus, Ohio, US; Suzuki, Hitoshi: “Cast zircornia refractories with good corrosion resistance” retrieved from STN, Database accession No. 80:73711, XP002225517, abstract & JP 48 085610 A (Toshiba Monofrax Co., Ltd.) Nov. 13, 1973.
Database CA 'Online!, Chemical Abstracts Service, Columbus, Ohio, US; Adylov, G. T. et al: “Phase composition and microstructure of fused refractories in the A1203- Zr02 -mullite system”: retrieved from STN, Database accession No. 121:236774, XP002225518, abstract & OGNEUPORY (1994), (6), 19-22.

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