VITRIFIED GRINDING STONE HAVING OPEN AND HOMOGENEOUS STRUCTURE
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United States of America Patent
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Nov 25, 2021
app pub date -
Mar 1, 2019
filing date -
Apr 6, 2018
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Abstract
A vitrified grinding stone having an open and homogeneous structure in which an abrasive grain and an inorganic hollow filler are bonded by an inorganic bonding agent, the abrasive grain is filled at a proportion by volume fraction of 23 to 35 vol %, and has homogeneity with a standard deviation of 10 or less in a frequency distribution chart of an area ratio of an abrasive grain, which is a distribution chart of proportions of a solid matter including the abrasive grain per unit area at a plurality of locations in a cross section of the vitrified grinding stone.
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