Fused ceramic beads

Details Fused ceramic beads Fused ceramic beads

1995-01-09

1996-03-26

Marcantoni, Paul

Compositions: ceramic

Ceramic compositions

Refractory

501104, 501105, C04B 3548

Patent

active

055020127

ABSTRACT:
The invention relates to fused ceramic beads, which have the following chemical composition in % by weight on the basis of the oxides:
40 to 95% of ZrO.sub.2 and HfO.sub.2 ;
at least one of Y.sub.2 O.sub.3 and CeO.sub.2, with the provisos that Y.sub.2 O.sub.3, when present, represents 0.1 to 10% and CeO.sub.2, when present, represents 1 to 25%, the total of Y.sub.2 O.sub.3 and CeO.sub.2 representing 0.1 to 25%;
a quantity of SiO.sub.2 representing 10 to 45% of the composition when CeO.sub.2 is absent from the composition and 0.5 to 45% when CeO.sub.2 is present in the composition. Application to grinding and to dispersion in wet medium is provided.

REFERENCES:
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patent: 4430279 (1984-02-01), Hagio et al.
patent: 4457767 (1984-07-01), Poon et al.
patent: 4690910 (1987-09-01), Tsukuma et al.
patent: 4742030 (1988-05-01), Masaki et al.
patent: 4772511 (1988-09-01), Wood et al.
patent: 4891343 (1990-01-01), Quadair
patent: 5017532 (1991-05-01), Sonnenberg et al.
patent: 5061665 (1991-10-01), Seki et al.
Chemical Abstract 117:218573v--abstract of article to Tian, Yicheng et al., Melt-cast zirconium-containing corundum lining bricks and balls for ball mills, and their manufacture, 57-Ceramics, vol. 117, No. 117: 218573v, p. 413, "Ceramics" (Jun. 1992).

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