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    Superior high alkali metal and calcium sol gel abrasive and processes for its production
    1.
    发明授权
    Superior high alkali metal and calcium sol gel abrasive and processes for its production 失效
    优良的高碱金属和钙溶胶凝胶磨料及其生产工艺

    公开(公告)号：US5770145A

    公开(公告)日：1998-06-23

    申请号：US446112

    申请日：1995-05-19

    申请人： Alvin P. Gerk ,  Robert J. Seider

    发明人： Alvin P. Gerk ,  Robert J. Seider

    IPC分类号： B24D3/14 ,  B24D11/00 ,  C01F7/44 ,  C09K3/14 ,  C04B35/10 ,  C04B35/64

    CPC分类号： C01F7/441 ,  B24D11/00 ,  B24D3/14 ,  C09K3/1418 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/21

    摘要： A process for forming a ceramic alumina-based abrasive grain from a sol gel which contains aluminum oxide monohydrate, a dissolved metal containing sintering aid and sufficient sodium and/or calcium compound to provide in the ceramic from above about 0.05 to about 1.8 weight percent sodium plus calcium, provided that the weight percent calcium is from 0 to about 1.8 and the weight percent sodium is from 0 to about 0.4. The high sodium and calcium is permitted due to rapid heating of the sol gel after drying through a temperature range of from below about 800.degree. C. to above about 1200.degree. C., prior to sintering the dried gel at a temperature above 1200.degree. C. A grain made by the process and coated, bonded and non-woven abrasive articles comprising the grain.

    摘要翻译： 一种由溶胶凝胶形成陶瓷氧化铝基磨料颗粒的方法，该溶胶凝胶含有一氧化铝一水合物，含溶解金属的烧结助剂和足够的钠和/或钙化合物，以从陶瓷中提供约0.05至约1.8重量％的钠 加钙，条件是钙的重量百分比为0至约1.8，而钠的重量百分比为0至约0.4。 在高于1200℃的温度下烧结干燥的凝胶之前，由于溶胶凝胶在干燥后的温度范围从低于约800℃至高于约1200℃的快速加热，允许高钠和钙。 由该方法制成的颗粒和包含该颗粒的涂布粘结和非织造的磨料制品。

    Process for improved densification of sol-gel produced alumina-based ceramics
    2.
    发明授权
    Process for improved densification of sol-gel produced alumina-based ceramics 失效
    溶胶凝胶生产的氧化铝基陶瓷的致密化改进方法

    公开(公告)号：US4574003A

    公开(公告)日：1986-03-04

    申请号：US606500

    申请日：1984-05-03

    申请人： Alvin P. Gerk

    发明人： Alvin P. Gerk

    IPC分类号： B24D3/28 ,  C01F7/02 ,  C04B35/111 ,  C09K3/14 ,  C04B35/10 ,  C09C1/68

    CPC分类号： B24D3/285 ,  C01F7/021 ,  C04B35/1115 ,  C09K3/1418

    摘要： The sol-gel process for forming dense, alumina-base ceramics, the process comprising1. preparing a dispersion of aluminum oxide monohydrate containing a precursor of a modifying additive in the form of a soluble salt;2. gelling the dispersion;3. drying the gel dispersion to form a solid;4. calcining the solid; and5. sintering the calcined solid,is improved by adding to the dispersion at least about 10 weight percent, based on the oxide equivalent of the soluble salt precursor, of at least one densification aid selected from the group consisting of alcohols, glycols and polyether compounds having a vaporization point in excess of the temperature at which the dispersion is dried. This improved process is particularly useful for manufacturing abrasive grains.

    摘要翻译： 用于形成致密的氧化铝基陶瓷的溶胶 - 凝胶法，该方法包括1.制备含有可溶性盐形式的改性添加剂前体的氧化铝一水合物的分散体; 凝胶分散; 3.干燥凝胶分散体以形成固体; 4.煅烧固体; 通过向分散体中添加至少约10重量％，基于可溶性盐前体的氧化物当量，至少一种选自醇，二醇和聚醚的致密化助剂来改善煅烧固体。 蒸发点超过分散体干燥温度的化合物。 这种改进的方法对于制造磨料颗粒是特别有用的。