Abrasive particles and methods of making and using the same
Assignee3M Innovative Properties Company
InventorAnatoly Z. Rosenflanz
Life of this patent
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Abstract
Abrasive particles comprising ceramic (including glasses, crystalline ceramics, and glass-ceramics) comprising (on a theoretical oxide basis) Al2O3 and at least one other metal oxide (e.g., REO and; REO and at least one of ZrO2 or HfO2) and methods of making the same. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
Claims38
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein at least 80 percent by weight of the glass-ceramic collectively comprises the Al2O3 and REO, based on the total weight of the glass-ceramic.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass-ceramic collectively comprises the Al2O3 and REO, and less than 20 percent by weight SiO2 and less than 20 percent by weight B2O3, based on the total weight of the glass-ceramic.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass-ceramic collectively comprises the Al2O3 and REO, and less than 40 percent by weight collectively SiO2, B2O3, and P2O5, based on the total weight of the glass-ceramic.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein the ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 1 micrometer, and (b) is free of eutectic microstructure features.
A method for making abrasive particles, the method comprising:
- heat-treating glass particles comprising Al2O3 and REO, wherein at least 80 percent by weight of the glass collectively comprises the Al2O3 and REO, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating particles comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 80 percent by weight of the glass collectively comprises the Al2O3 and REO, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass comprising Al2O3 and REO, wherein at least 80 percent by weight of the glass collectively comprises the Al2O3 and REO, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating ceramic comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 80 percent by weight of the glass collectively comprises the Al2O3 and REO, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass particles comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 20 percent by weight SiO2 and less than 20 percent by weight B2O3, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating particles comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 20 percent by weight SiO2 and less than 20 percent by weight B2O3, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 20 percent by weight SiO2 and less than 20 percent by weight B2O3, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating ceramic comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 20 percent by weight SiO2 and less than 20 percent by weight B2O3, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass particles comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 40 percent by weight collectively SiO2, B2O3, and P2O5, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating particles comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 40 percent by weight collectively SiO2, B2O3, and P2O5, based on the total weight of the glass particles, to provide glass-ceramic abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass comprising Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 40 percent by weight collectively SiO2, B2O3, and P2O5, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating ceramic comprising glass, wherein the glass comprises Al2O3 and REO, wherein at least 60 percent by weight of the glass collectively comprises the Al2O3 and REO, and less than 40 percent by weight collectively SiO2, B2O3, and P2O5, based on the total weight of the glass, to provide glass-ceramic;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating glass particles comprising Al2O3 and REO to provide glass-ceramic abrasive particles, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 1 micrometer, and (b) is free of eutectic microstructure features.
A method for making abrasive particles, the method comprising:
- heat-treating particles comprising glass, wherein the glass comprises Al2O3 and REO to provide glass-ceramic abrasive particles, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 1 micrometer, and (b) is free of eutectic microstructure features.
A method for making abrasive particles, the method comprising:
- heat-treating glass comprising Al2O3 and REO to provide glass-ceramic, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 1 micrometer, and (b) is free of eutectic microstructure features;
- and
- converting the glass-ceramic to provide abrasive particles.
A method for making abrasive particles, the method comprising:
- heat-treating ceramic comprising glass, wherein the glass comprises Al2O3 and REO to provide glass-ceramic, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 1 micrometer, and (b) is free of eutectic microstructure features;
- and
- converting the glass-ceramic to provide abrasive particles.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 200 nanometers and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites, wherein none of the crystallites are greater than 200 nanometers in size and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising a glass-ceramic comprising Al2O3 and REO, wherein the glass-ceramic (a) exhibits a microstructure comprising crystallites, wherein at least a portion of the crystallites are not greater than 150 nanometers in size and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising ceramic comprising at least 75 percent by volume crystalline ceramic, the crystalline ceramic comprising Al2O3 and REO, wherein the ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size of less than 200 nanometers and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising ceramic comprising at least 75 percent by volume crystalline ceramic, the crystalline ceramic comprising Al2O3 and REO, wherein the ceramic (a) exhibits a microstructure comprising crystallites, wherein none of the crystallites are greater than 200 nanometers in size and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising ceramic comprising at least 75 percent by volume crystalline ceramic, the crystalline ceramic comprising Al2O3 and REO, wherein the ceramic (a) exhibits a microstructure comprising crystallites, wherein at least a portion of the crystallites are not greater than 150 nanometers in size and (b) has a density of at least 90% of theoretical density.
Abrasive particle comprising ceramic comprising at least 75 percent by volume crystalline ceramic, the crystalline ceramic comprising Al2O3 and REO, wherein the ceramic (a) exhibits a microstructure comprising crystallites having an average crystallite size not greater than 200 nanometer, in size and (b) has a density of at least 90% of theoretical density.
Dependencies are inferred from the claim text.