Subsolidus phase relations have been determined in the CdO-InO1.5-SnO2 system at 1175°C. A cubic-bixbyite solution In2-2x(Cd,Sn)2xO3 (0 < x < 0.34), a cubic spinel solution (1-x)CdIn2O4-xCd2SnO4 (0 < x < 0.75), and an orthorhombic-perovskite solution Cd1-xSn1-xIn2xO3 (0 < x < 0.045) having the GdFeO3 structure have been discovered. The CdO phase field exists over a small range of InO1.5 (<3%) and SnO2 (<1%). Orthorhombic Cd2SnO4 (Sr2PbO4 structure) and rutile SnO2 appear to be point compounds with negligible solubility. The vertical section between spinel CdIn2O4 and orthorhombic Cd2SnO4 was determined between 900° and 1175°C. The spinel phase field (1-x)CdIn2O4-xCd2SnO4 was found to extend between x = 0 and x = 0.75 at 1175°C or x = 0.78 at 900°C. All of the phases in this system appear to allow small excess quantities of the donors In and/or Sn (vs cation stoichiometry) which may be the source of the electrons that give these oxides their n-type character. The electrical and optical properties of bulk and thin-film specimens in this system are compared and contrasted with each other and the relative merits of each are assessed.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of the American Ceramic Society|
|State||Published - Sep 2002|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry