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公开(公告)号：US06379417B2
公开(公告)日：2002-04-30
申请号：US09317186
申请日：1999-05-24
IPC分类号： C22C2912
CPC分类号： H01M4/9066 , C22C1/1026 , C22C29/12 , C22C32/0026
摘要： The present invention provides a nickel cermet, which includes: 35% to 70% by weight of a nickel phase, and 65% to 30% by weight of zirconium oxide phase, wherein the zirconium oxide is stabilized in cubic form by 5 to 20 moles of yttrium oxide for each 100 moles of said zirconium oxide, and the metal nickel and zirconium oxide phases, upon X ray diffraction analysis are distinct and homogeneously distributed; and is prepared by a process that includes: a) dispersing zirconia stabilized by yttria having a particle size of between 1 and 40 &mgr;m , in demineralized water to prepare a suspension; b) dissolving a hydrosoluble and thermodecomposable nickel salt in demineralized d water to prepare a solution; c) mixing the nickel solution with the suspension and homogenizing the resulting dispersion by magnetic stirring for a time of between 5 and 40 minutes; d) eliminating the water from the dispersion by a system capable of operating without, or almost without, decomposition phenomena to obtain a solid that includes particles of zirconia stabilized by yttria covered with nickel salt; e) calcining under oxidating conditions the solid to cause the formation of a solid that includes particles of zirconia stabilized by yttria covered with nickel oxide; and f) treating with hydrogen the solid obtained in step (e) to reduce the nickel oxide to metal nickel and obtain the nickel cermet.
摘要翻译： 本发明提供一种镍金属陶瓷，其包括：35重量％至70重量％的镍相和65重量％至30重量％的氧化锆相，其中所述氧化锆以立方体形式稳定5至20摩尔 在X射线衍射分析时，每100摩尔所述氧化锆和金属镍和氧化锆相的氧化钇是不同且均匀分布的; 并且通过包括以下步骤制备的方法：a）在软化水中分散具有1至40μm的粒度的氧化钇稳定的氧化锆以制备悬浮液; b）将水溶性和热可分解的镍盐溶解在软化的d水中以制备 溶液; c）将镍溶液与悬浮液混合，并通过磁力搅拌将所得分散体均质化5至40分钟; d）通过能够在没有或几乎不存在的情况下操作的系统从分散体中除去水， 分解现象，以获得包括由镍盐覆盖的氧化钇稳定的氧化锆颗粒的固体; e）在氧化条件下煅烧形成固体的固体，其包括用氧化镍覆盖的氧化钇稳定的氧化锆颗粒; 和）用氢气处理步骤（e）中获得的固体，以将氧化镍还原为金属镍并获得镍金属陶瓷。
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