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    • 10. 发明公开
    • SINTERED ZIRCONIA AND PROCESS FOR ITS PRODUCTION.
    • GESINTERTES ZIRKON UND DESSEN HERSTELLUNG。
    • EP0214291A4
    • 1987-07-09
    • EP85903375
    • 1985-07-03
    • NIPPON SODA CO
    • MORISHITA JUNICHIKIMURA NOBUOOKAMURA HIROMICHI
    • C04B35/486C04B35/488
    • C04B35/486C04B35/4885
    • High-density sintered zirconia containing a stabilizer such as Y2O3 can be produced through low-temperature sintering by first preparing readily sinterable zirconia powder having a transition metal compound on the surface thereof by adding stabilizer-containing zirconia powder or precursor powder capable of yielding zirconia upon thermal decomposition to a solution or dispersion of a transition metal compound which acts as a sintering accelerator, then adjusting the content of Y2O3 to 1.3 to 2.0 mol % and the content of a tetragonal phase to 65% or more. Thus, a partially stabilized sintered zirconia having a fracture toughness of 10 to 16 MM/m can be obtained. A composite product between this partially stabilized zirconia and alpha -alumina has an extremely high hardness.
    • 含有Y 2 O 3等稳定剂的高密度烧结氧化锆可以通过如下方法制造:首先,通过将含有稳定剂的氧化锆粉末或能够生成氧化锆的前体粉末加入到其表面上,制备易于烧结的具有过渡金属化合物的可烧结氧化锆粉末 热分解成作为烧结促进剂的过渡金属化合物的溶液或分散液,然后将Y 2 O 3的含量调节至1.3至2.0摩尔%,并且将四方相的含量调节至65%或更高。 因此,可以获得断裂韧性为10至16MM / m 3/2的部分稳定的烧结氧化锆。 这种部分稳定的氧化锆和α-氧化铝之间的复合产品具有非常高的硬度。