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    • 3. 发明授权
    • Method of making core shell structured articles based on alumina
ceramics having spinel surfaces
    • 基于具有尖晶石表面的氧化铝陶瓷制造芯壳结构制品的方法
    • US5683481A
    • 1997-11-04
    • US700256
    • 1996-08-20
    • Dilip K. ChatterjeeSyamal K. GhoshGregory S. Jarrold
    • Dilip K. ChatterjeeSyamal K. GhoshGregory S. Jarrold
    • C04B35/10C04B35/119C04B35/64C04B41/50C04B41/87C03B19/01C03B19/09C04B33/34C04B33/36
    • C04B41/009C04B35/119C04B35/64C04B41/5046C04B41/87C04B2111/0025
    • An alumina ceramic article and a method for preparing the article. The method comprises the steps of: (1) Compacting a mixture of a first concentration of particulate aluminum oxide sufficient to prevent retention of the zirconium oxide alloy particles in the shell in a predominantly tetragonal crystal structure and a second concentration of particulate zirconium oxide alloy. The zirconium oxide alloy is zirconium oxide and a secondary oxide selected from the group consisting of MgO, CaO, Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, CeO.sub.2, and rare earth oxides having a concentration of secondary oxide generally of about 0.5 to about 5 mole percent Y.sub.2 O.sub.3, from about 0.1 to about 1 mole percent MgO, from about 0.5 to about 15 mole percent CeO.sub.2, from about 0.5 to about 7.0 mole percent Sc.sub.2 O.sub.3, or from about 0.5 to about 5 mole percent CaO, relative to the total of the zirconium oxide alloy. The compacting results in the formation of a blank.(2) Providing contact between the blank and a dopant oxide. (3) Sintering the blank in contact with the dopant oxide wherein said first concentration is from 50-75 weight percent of the total of the first and second concentrations.
    • 一种氧化铝陶瓷制品及其制备方法。 该方法包括以下步骤:(1)将第一浓度的微粒氧化铝的混合物压实成足以防止氧化锆合金颗粒以主要为四方晶体结构和第二浓度的颗粒状氧化锆合金在壳中的保留。 氧化锆合金是氧化锆和选自MgO,CaO,Y 2 O 3,Sc 2 O 3,CeO 2的二次氧化物和二氧化硫浓度通常为约0.5〜约5摩尔%Y 2 O 3的稀土氧化物,从约 0.1至约1摩尔%的MgO,约0.5至约15摩尔%的CeO 2,约0.5至约7.0摩尔%的Sc 2 O 3,或约0.5至约5摩尔%的CaO,相对于氧化锆合金的总量。 压实导致形成空白。 (2)提供坯料与掺杂剂氧化物之间的接触。 (3)烧结坯料与掺杂剂氧化物接触,其中所述第一浓度为第一和第二浓度总量的50-75重量%。