{
  "$type": "site.standard.document",
  "description": "The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type…",
  "path": "/patents/1084684",
  "publishedAt": "2004-08-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C04B35/01",
    "SEIMI CHEM KK [JP]"
  ],
  "textContent": "The present invention provides a composite oxide for a high performance solid oxide fuel cell which can be fired at a relatively low temperature, and which has little heterogeneous phases of impurities other than the desired composition. The composite oxide is the one having a perovskite type crystal structure containing rare earth elements, and having constituent elements homogeneously dispersed therein. A homogeneous composite oxide having an abundance ratio of heterogeneous phases of at most 0.3% by average area ratio, and a melting point of at least 1470°C, is obtained by using metal carbonates, oxides or hydroxides, and reacting them with citric acid in an aqueous system.",
  "title": "COMPOSITE OXIDE FOR SOLID OXIDE FUEL CELL AND METHOD FOR PREPARATION THEREOF"
}