Sol–gel synthesis and characterization of Co-doped LSGM perovskites

X-ray single phase LSGM at 1350°C

“…The sintering temperature of 1350 • C is 100 • C lower than the ones reported in the literature (1450 • C or higher). [22][23][24][25] Sintered pellets with x = 0.1, y = 0.15 and 0.17 were used in the impedance analyses at temperatures between room temperature and 545 • C. The result of complex-plane impedance measurement performed at 250 • C on sample y = 0.17 is shown in Fig. 6.…”

“…6,7 Solid state reaction (SSR) method is the preferred choice of processing in a laboratory environment due to its simplicity. However, SSR has problems with the homogeneity of the oxide/carbonate mixture, 8,9 and relatively high calcination temperatures.…”

Sol–gel synthesis, X-ray photoelectron spectroscopy and electrical conductivity of Co-doped (La, Sr)(Ga, Mg)O3− perovskites

“…18 In fact, following this calcination step (24 h at 1000 • C), both perovskite phase and small quantities of SrLaGaO 4 and SrLaGa 3 O 7 were formed. 19 The powders were then ground in an agate mortar and then uniaxially pressed at 300 MPa using a 13 mm cylindrical die. The pellets were sintered in air at 1475 • C for 5, 10 or 20 h, with a heating rate of 10 • C/min.…”

A microwave-induced solution-polymerization synthesis of doped LaGaO3 powders

“…Furthermore, it was found that the oxide ion conductivity was also improved by doping with Co in Ga sites in the LSGM [4]. The highest ionic conductivity, which at 600 • C was twice as high as LSGM, was found for A-substoichiometric La 0.85 Sr 0.15 (Ga 0.9 Co 0.1 ) 0.8 Mg 0.2 O 3−x+δ [5,6].…”