The whitealumina abrasives made with vitrified bond may show red in white, red -yellow or celadon-gray. This will influence on the appearance quality of the products seriously.
陶瓷结合剂白刚玉磨具会出现白里显红、红黄、青灰色调，严重影响产品的外观质量。
2
Addition of the powders of talc, quartz and magnesium oxide to vilified bond, red color of whitealumina abrasives can be avoid, but in the meanwhile the strength of the abrasives can be influenced.
From inner to outside, the composite pipe consisted of alumina ceramic layer, metal transition layer, white cast layer, carbon atom diffusion layer and nodular cast iron layer.