Preparation and Electrical Conductivity of Sr(Zr1-xAlx)O3-x/2 Perovskite Solid Solution (x = 0-0.5)

Ryuji Oitate; Yoshihiro Hirata; Soichiro Sameshima; Naoki Matsunaga

doi:10.4028/www.scientific.net/MSF.761.19

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Preparation and Electrical Conductivity of Sr(Zr_1-xAl_x)O_3-x/2 Perovskite Solid Solution (x = 0-0.5)

Abstract:

Perovskite solid solution of Sr(Zr_1-xAl_x)O_3-x/2 was prepared by a coprecipitation method using corresponding aqueous solutions and ammonium carbonate solution. The freeze-dried powders at x = 0-0.5, heated at 1000°C for 4 h in air, were identified to be an orthorhombic SrZrO₃ solid solution. The highest electrical conductivity of Sr(Zr_1-xAl_x)O_3-x/2 system sintered at 1400°C was measured at x = 0.2 (3.80×10^-4 S/cm at 800°C, activation energy 109 kJ/mol ). The activation energy also showed a maximum value at x = 0.25 .