Fused ceramic beads
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United States of America Patent
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Mar 26, 1996
Grant Date -
N/A
app pub date -
Jan 9, 1995
filing date -
Jan 11, 1994
priority date (Note) -
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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.
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