(JP4214069-A)      The composite oxide mainly comprises a Perovskite structure of (La1-xMx)a(Cr1-yFe)bO3 (where M=alkaline earth metal except Mg; x = more than 0 to 0.5; y = more than 5.0 to 0.5; but b/a = 0.95-1.05).    USE -   Used for high-temp. type fuel cells, and MHD power generation, having high density, and high electric conductivity    (JP4219364-A)      The lanthanum chromite composite oxide has Perovskite structure of La1-xAxCr1-yMyO3, where A = an alkaline earth metal except Mg; M = at least two different elements selected from Fe, Ni, Co, Zn, Cu, Al, Mn, V, Ir, Mo, W, Pd, Y, Pt, Rh, Mg, Ti, Si, and B. A combination of Co and Zn, and Ni and Zn = excepted; x = 0-0.5; y = 0-0.5.    USE -   Used in high-temp. conductive materials, or a high-temp. fuel battery having a separator of the composite oxide. Used in MHD power generation etc.. Superior conductivity    (JP4219365-A)      The lanthanum chromite composite oxide has perovskite structure of La1-xMxCr1-y-zCOyZnzO3, where A = an alkali earth metal except magnesium; x = 0-0.5; y = at least O, z = at least O; y + z = 0-0.5.    USE -   The composite oxide is used in high-temp. conductive materials, or high-temp. fuel battery having a separator comprising composite oxide. The high-temp. conductive materials are used in MHD power generation etc.. The composite oxide features easy compactness at ordinary pressure atmospheric pressure and superior conductivity    (JP4219366-A)      Double oxide has a Perovskite structure and is expressed by (La1-xMx)a(Cr1-yM'y)bO3, where M = alkaline earth metal except Mg; M' = Ni, Zn, Cu, Mn, V, Ir, Al, Mo, W, Pd, Y, Pt, Rh, Ti, Si, or B; x = 0 to 0.5; y = 0-0.5; and b/a = 0.95-1.05.    USE -   For high temp. electroconductive material; more specifically, for separators of high temp. type fuel cell    (JP4219367-A)      Double oxide has a Perovskite structure and expressed by (La1-xMx)a(Cr1-yNiyZnz)bO3, where M = alkaline earth metal except Mg; x = 0 to 0.5; y is greater than 0, Z is greater than 0; (y + z) = 0-0.5; and b/a = 0.05-1.05.    USE -   For high temp. electroconductive material; more specifically, for separators of high temp. type fuel cell    (JP2836852-B2)      A lanthanum chromite-based complex oxide is represented by the formula: La1-xMxCr1-yO3, where M = at least one alkaline earth metal other than Mg; M' = at least one metal from the gp. of Co, Fe, Ni, Zn, Cu, Mn, Al, V, Ir, Mo, W, Pd and Y. x = 0-0.5; y = 0-0.5. The complex oxide has a perovskite structure.    USE/ADVANTAGE -   Used as a high-temp. electrically conductive material, partic. as a separator in a solid oxide fuel cell. The invented oxide may be sintered to at least 95% of theoretical density at normal pressure, has excellent resistance to both oxidn. and redn. and has an electrical conductivity more than twice that of conventional lanthanum chromite (LaCrO3).    (JP3134882-B2)      A lanthanum chromite-based complex oxide is represented by the formula: La1-xMxCr1-yO3, where M = at least one alkaline earth metal other than Mg; M' = at least one metal from the gp. of Co, Fe, Ni, Zn, Cu, Mn, Al, V, Ir, Mo, W, Pd and Y. x = 0-0.5; y = 0-0.5. The complex oxide has a perovskite structure.    USE/ADVANTAGE -   Used as a high-temp. electrically conductive material, partic. as a separator in a solid oxide fuel cell. The invented oxide may be sintered to at least 95% of theoretical density at normal pressure, has excellent resistance to both oxidn. and redn. and has an electrical conductivity more than twice that of conventional lanthanum chromite (LaCrO3). @(14pp Dwg.No.1/6)@    (JP3134883-B2)      A lanthanum chromite-based complex oxide is represented by the formula: La1-xMxCr1-yO3, where M = at least one alkaline earth metal other than Mg; M' = at least one metal from the gp. of Co, Fe, Ni, Zn, Cu, Mn, Al, V, Ir, Mo, W, Pd and Y. x = 0-0.5; y = 0-0.5. The complex oxide has a perovskite structure.    USE/ADVANTAGE -   Used as a high-temp. electrically conductive material, partic. as a separator in a solid oxide fuel cell. The invented oxide may be sintered to at least 95% of theoretical density at normal pressure, has excellent resistance to both oxidn. and redn. and has an electrical conductivity more than twice that of conventional lanthanum chromite (LaCrO3). @(14pp Dwg.No.1/6)@