Sintered corundum is a pure sintered alpha-alumina material that has been fully densified by rapidly being sintered without aids at temperatures above 1900°C. Sintered corundum is of characteristic large, well developed hexagonal tablet shaped alpha-alumina crystals. The excellent thermal volume stability and thermal shock characteristics can be attributed to its specific micro structure, low open porosity and large crystals with closed spherical pores, which are entrapped upon re-crystallization during rapidly being sintered.
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