# US 9,517,546 B2 · Abrasive articles including abrasive particulate materials, coated abrasives using the abrasive particulate materials and methods of forming > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,546 B2 - Document ID: US9517546B2 - Status: Granted - Kind: B2 - Application number: 13/627,923 - Filed: 2012-09-26 - Published: 2013-03-28 - Granted: 2016-12-13 - Earliest claimed: 2011-09-26 - Assignees: Saint-Gobain Ceramics & Plastics, Inc. - Applicants: Tracy H. Panzarella; Doruk O. Yener - Inventors: Tracy H. Panzarella; Doruk O. Yener - Web page: https://patentgrep.com/patent/US9517546B2 ## CPC - B24D 3/348: {utilised as impregnating agent for porous abrasive bodies} - C09K 3/1436: {Composite particles, e.g. coated particles} - C01P 2004/50: Agglomerated particles - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract An abrasive particulate material which is made of alumina crystals and a primary additive composition impregnated within the abrasive particulate material, the primary additive composition including a combination of Mg and Ca, wherein Mg and Ca are present in an additive ratio [Mg:Ca] within a range between about 1:1 and about 10:1, and a Ca amount is at least about 0.2 wt % Ca for the total weight of the abrasive particulate material. ## Claims ### Claim 1 An abrasive article comprising: an abrasive particulate material comprising alumina crystals and a primary additive composition impregnated within the abrasive particulate material, the primary additive composition comprising a combination of Mg and Ca, wherein Mg and Ca are present in an additive ratio [Mg:Ca] within a range between about 1:1 and about 10:1, wherein the abrasive particulate material comprises Mg in an amount of at least about 0.1 wt % and not greater than about 2 wt % based on the total weight of the abrasive particulate material and further comprising at least about 0.2 wt % Ca for the total weight of the abrasive particulate material, and wherein the abrasive particulate material is free of a rare earth oxide. ### Claim 2 (depends on 1) The abrasive article of claim 1, wherein the alumina crystals comprise alpha alumina. ### Claim 3 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises Ca in an amount of at least about 0.25 wt % and not greater than about 2 wt % based on the total weight of the abrasive particulate material. ### Claim 4 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises Mg in an amount of at least about 0.1 wt % and not greater than about 1.5 wt % based on the total weight of the abrasive particulate material. ### Claim 5 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises not greater than about 8 wt % of the primary additive composition. ### Claim 6 (depends on 1) The abrasive article of claim 1, wherein the additive ratio [Mg:Ca] is within a range between about 1:1 and about 9:1. ### Claim 7 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises a crystallinity content of at least about 90 wt %. ### Claim 8 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises a contour, and wherein the contour comprises a polyhedral shape. ### Claim 9 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material is part of a fixed abrasive. ### Claim 10 (depends on 1) The abrasive article of claim 1, wherein the additive ratio [Mg:Ca] is within a range between about 3:1 and about 10:1. ### Claim 11 (depends on 1) The abrasive article of claim 1, wherein the abrasive particulate material comprises shaped abrasive particles selected from the group consisting of triangular, rectangular, pentagonal, hexagonal, conical, helical, elliptical, elongated shape, and any combination thereof. ### Claim 12 (depends on 11) The abrasive article of claim 11, wherein the shaped abrasive particles have a triangular shape. ### Claim 13 An abrasive article comprising: an abrasive particulate material consisting essentially of alumina crystals and a primary additive composition impregnated within the abrasive particulate material, the primary additive composition consisting essentially of a combination of Mg and Ca, wherein Mg and Ca are present in an additive ratio [Mg:Ca] within a range between about 1:1 and about 10:1, wherein the abrasive particulate material comprises Mg in an amount of at least about 0.1 wt % and not greater than about 2 wt % based on the total weight of the abrasive particulate material and further comprising at least about 0.2 wt % Ca for the total weight of the abrasive particulate material. ### Claim 14 (depends on 13) The abrasive article of claim 13, wherein the alumina crystals comprise alpha alumina. ### Claim 15 (depends on 13) The abrasive article of claim 13, wherein the abrasive particulate material comprises Ca in an amount of at least about 0.25 wt % and not greater than about 2 wt % Ca based on the total weight of the particulate material. ### Claim 16 (depends on 13) The abrasive article of claim 13, wherein the abrasive particulate material comprises Mg in an amount of at least about 0.1 wt % and not greater than about 1.5 wt % based on the total weight of the abrasive particulate material. ### Claim 17 (depends on 13) The abrasive article of claim 13, wherein the additive ratio [Mg:Ca] is within a range between about 1:1 and about 9:1. ### Claim 18 (depends on 13) The abrasive article of claim 13, wherein the additive ratio [Mg:Ca] is within a range between about 3:1 and about 10:1. ### Claim 19 (depends on 13) The abrasive article of claim 13, wherein the abrasive particulate material comprises shaped abrasive particles having a shape selected from the group consisting of triangular, rectangular, pentagonal, hexagonal, conical, helical, elliptical, elongated, and a combination thereof. ### Claim 20 (depends on 19) The abrasive article of claim 19, wherein the shaped abrasive particles have a triangular shape. ### Claim 21 (depends on 13) The abrasive article of claim 13, wherein the abrasive particulate material is part of a fixed abrasive.