Sol-gel alumina shaped bodies
    1.
    发明授权
    Sol-gel alumina shaped bodies 失效
    溶胶 - 凝胶氧化铝形体

    公开(公告)号:US5035724A

    公开(公告)日:1991-07-30

    申请号:US521296

    申请日:1990-05-09

    摘要: A process for producing dry substantially crack-free shaped bodies, such as grinding wheels, from a sol-gel alumina hydrate composition is disclosed. The shaped bodies are formed by either a one or a two step forming process and avoid having to pre-prepare alpha alumina grits. The addition of specific crack-avoiding drying control additives, e.g. whiskers, chopped fibers, agarose gels, and formamide, to the sol-gel alumina hydrate prior to water removal therefrom substantially prevents crack-formation during the water removal operation.

    摘要翻译: 公开了一种从溶胶 - 凝胶氧化铝水合物组合物制造干燥的基本上无裂纹的成形体(例如砂轮)的方法。 成形体通过一个或两个步骤形成工艺形成,并避免不必预先制备α氧化铝砂粒。 添加特定的防裂干燥控制添加剂,例如。 晶须,短切纤维,琼脂糖凝胶和甲酰胺,在去除水之前,与溶胶 - 凝胶氧化铝水合物基本上防止了除水操作期间的裂纹形成。