Fused Al2O3-rare earth oxide-ZrO2 eutectic materials
Assignee3M Innovative Properties Company
InventorAnatoly Z. Rosenflanz
Life of this patent
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Abstract
Fused, crystalline eutectic material comprising Al2O3-rare earth oxide-ZrO2 eutectic. Examples of useful articles comprising the fused eutectic material include fibers and abrasive particles.
Claims32
Fused, crystalline eutectic material comprising eutectic of at least:
- (a) crystalline ZrO2 and
- (b) at least two of:
- (i) crystalline Al2O3,
- (ii) first crystalline complex Al2O3.rare earth oxide, or
- (iii) second, different, crystalline complex Al2O3.rare earth oxide.
Fused, crystalline eutectic material comprising eutectic of at least:
- (a) crystalline ZrO2 and
- (b) at least two of:
- (i) crystalline Al2O3,
- (ii) first crystalline complex Al2O3.rare earth oxide, or
- (iii) second different, crystalline complex Al2O3.rare earth oxide,
- wherein the fused, crystalline eutectic material comprises, on a theoretical oxide basis, at least 40 percent by weight Al2O3, based on the total metal oxide content of said eutectic material, wherein said rare earth oxide is selected, on a theoretical oxide basis, from the group consisting of CeO2, Dy2O3, Er2O3, Eu2O3, Gd2O3, La2O3, Nd2O3, Pr6O11, Sm2O3, Yb2O3, and combinations thereof, and wherein a portion of said complex Al2O3.rare earth oxide Al cations are substituted with at least one cation of an clement selected from the group consisting of:
- Cr, Ti, Sc, Fe, Mg, Ca, Si, Co, and combinations thereof.
Fused, crystalline eutectic material comprising eutectic of at least:
- (a) crystalline ZrO2 and
- (b) at least two of:
- (i) crystalline Al2O3,
- (ii) first crystalline complex Al2O3.rare earth oxide, or
- (iii) second, different, crystalline complex Al2O3.rare earth oxide,
- wherein the fused, crystalline eutectic material comprises, on a theoretical oxide basis, at least 40 percent by weight Al2O3, based on the total metal oxide content of said eutectic material, wherein said rare earth oxide is selected, on a theoretical oxide basis, from the group consisting of CeO2, Dy2O3, Er2O3, Eu2O3, Gd2O3, La2O3, Nd2O3, Pr6O11, Sm2O3, Yb2O3, and combinations thereof, and wherein a portion of said complex rare earth oxide rare earth cations are substituted with at least one cation of an element selected from the group consisting of:
- Ce, Dy, Er, Eu, Gd, Ho, La, Lu, Nd, Pr, Sm, Th, Tm, Yb, and combinations thereof.
Fused, crystalline eutectic material comprising eutectic of at least:
- (a) crystalline ZrO2 and
- (b) at least two of:
- (i) crystalline Al2O3,
- (ii) first crystalline complex Al2O3.rare earth oxide, or
- (iii) second, different, crystalline complex Al2O3.rare earth oxide,
- wherein the fused, crystalline eutectic material comprises, on a theoretical oxide basis, at least 40 percent by weight Al2O3, based on the total metal oxide content of said eutectic material, wherein said rare earth oxide is selected, on a theoretical oxide basis, from the group consisting of CeO2, Dy2O3, Er2O3, Eu2O3, Gd2O3, La2O3, Nd2O3, Pr6O11, Yb2O3, and combinations thereof, and wherein a portion of said complex Al2O3.rare earth oxide rare earth cations are substituted with at least one cation of an element selected from the group consisting of:
- Fe, Ti, Mn, V, Cr, Co, Ni, Cu, Mg, Ca, Sr, and combinations thereof.
Fused, crystalline eutectic material comprising eutectic of at least:
- (a) crystalline complex Al2O3.rare earth oxide and
- (b) crystalline ZrO2.
A method for making fused, crystalline eutectic material comprising eutectic of at least (a) crystalline ZrO2 and (b) at least two of (i) crystalline Al2O3, (ii) first crystalline complex Al2O3.rare earth oxide, or (iii) second, different, crystalline complex Al2O3.rare earth oxide, said method comprising:
- melting at least one Al2O3 source, at least one rare earth oxide source, and at least one ZrO2 source to provide a melt;
- and
- converting the melt to said fused, crystalline eutectic material.
A method for making fused, crystalline eutectic material comprising eutectic of at least (a) crystalline complex Al2O3.rare earth oxide and (b) crystalline ZrO2, said method comprising:
- melting at least one Al2O3 source, at least one rare earth oxide source, and at least one ZrO2 source to provide a melt;
- and
- converting the melt to said fused, crystalline eutectic material.
Dependencies are inferred from the claim text.