Patent ID: 8617273

Claim:
An abrasive article comprising: an abrasive body having abrasive grains contained within a bond material, wherein the abrasive grains comprise microcrystalline alumina, and wherein the bond material comprises less than about 1.0 mol % phosphorous oxide (P 2 O 5 ), and a ratio between a total content of sodium oxide (Na 2 O) measured in mol % and a total content of potassium oxide (K 2 O) measured in mol % defined by [K 2 O/Na 2 O] having a value greater than about 1; wherein the bond material comprises a total content of alkali oxide compounds of less than 12 mol %; and wherein the bond material comprises silica and wherein a ratio between a total content of silica (SiO 2 ) measured in mol % and a total content of alkali oxide compounds (C aoc ) measured in mol % expressed as [C aoc /SiO 2 ] is greater than about 0.18.