Material for solid state sintered material

摘要

A solid state sintered material is described that includes a mixed oxide of lanthanum, strontium, cobalt, iron and oxygen, and CaCO3 inclusions. The solid state sintered material can also include calcium oxide, which can form from thermal composition of calcium carbonate. The solid state sintered material can also include a pore-forming particulate material such as carbon black and/or a doped ceramic metal oxide ionic conductor such as Sm-doped ceria uniformly dispersed in the solid state sintered material. The solid state sintered material can be formed from a two-step process in which a portion of the CaCO3 is mixed with the mixed oxide materials and heated to form porous agglomerates, and the remaining CaCO3 is added during the formation of a sintering paste. The solid state sintered material described herein can be used as a cathode material for solid oxide fuel cell.

主权项

1. A method of making a solid state sintered material, comprising:
(1) forming a mixture comprising calcium carbonate and a mixed oxide comprising lanthanum, strontium, cobalt, and iron; (2) milling and drying the mixture from (1); (3) heating the dried mixture from (2) to form porous agglomerates; (4) forming a paste comprising an organic binder, the porous agglomerates from (3), and additional calcium carbonate; and (5) sintering the paste from (4) under pressure and temperature conditions to cause solid state sintering.