公开(公告)号：US20080015103A1

公开(公告)日：2008-01-17

申请号：US11775671

申请日：2007-07-10

申请人： Walter Luscher ,  John Hellmann ,  Barry Scheetz ,  Brett Wilson

发明人： Walter Luscher ,  John Hellmann ,  Barry Scheetz ,  Brett Wilson

IPC分类号： C04B38/00

CPC分类号： C04B35/10 ,  C04B35/14 ,  C04B35/18 ,  C04B38/0025 ,  C04B38/0645 ,  C04B2111/343 ,  C04B38/007 ,  C04B41/0018

摘要： Disclosed is a method for making a material having a controlled microstructure, the method including providing particles of a ceramic mineral material, the particles having a metal oxide dopant therein. The particles of the ceramic mineral material are consolidated into larger aggregates of a size relevant to the desired application using standard industrial mixing and pelletizing technology. The aggregates are heated under reducing conditions so that at least part of the dopant is reduced to form a transient, metastable liquid phase among the particles. The liquid phase includes at least part of the reduced dopant and promotes sintering of the particles and forms islands of reduced metal within the material and on the surface of the aggregates. Following heating of the aggregates under reducing conditions, the aggregates are heated under oxidizing conditions such that the islands of reduced metal are oxidized and/or go into solid solution within the particles, thereby creating voids within and form a shell thereon the particles.

摘要翻译： 公开了一种制备具有可控微结构的材料的方法，该方法包括提供陶瓷矿物材料的颗粒，其中具有金属氧化物掺杂剂的颗粒。 使用标准工业混合和造粒技术将陶瓷矿物材料的颗粒固结成与所需应用相关尺寸的较大聚集体。 聚集体在还原条件下加热，使得至少部分掺杂剂被还原以在颗粒之间形成瞬时的亚稳态液相。 液相包括至少部分还原的掺杂剂并且促进颗粒的烧结并且在材料内和聚集体的表面上形成还原金属的岛。 在还原条件下加热聚集体后，在氧化条件下加热聚集体，使得还原金属的岛被氧化和/或在颗粒内进入固溶体，由此在其上形成空隙并在其上形成壳。