Effect of sintering temperature and grain size on the electrical transport properties of La0.67Sr0.33MnO3 manganite

Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

“…In comparison with our previous results [8], it is illustrated that with the increase in the annealing temperature, the particle size of samples increased, confirming that the annealing temperature promotes the grain growth of the samples [15][16][17]24,25].…”

Tailoring high-temperature stability and electrical conductivity of high entropy lanthanum manganite for solid oxide fuel cell cathodes

“…In addition, the highest density and largest grain size in LSM82 should have contributed to its high conductivity due to the lower grain boundary resistivity. 55,56 As mentioned earlier, the electrical conductivity of HEALMO-3 is comparable or even better than that of LSM82 in the high temperature range (about 800-1000 C) due to a much slower increase in the conductivity of LSM82 with temperature compared to that of HEALMO-3. This difference in conductivity change may be correlated with the change of carrier density with temperature, which can be reected from the Seebeck coefficient results (Fig.…”

“…† Therefore, the obtained conductivity of the HEALMO samples is probably underestimated to a certain extent with respect to LSM82 considering the normally lower electrical conductivity of grain boundaries as well as an increasing conductivity with grain size in LSM82. 55,56 As is shown, the electrical conductivity of HEALMO-1, HEALMO-2, HEALMO-3 and LSM82 all increases with increasing temperature. The electrical conductivity of HEALMO-1 is negligible before about 900 C, and increases slowly with increasing temperature.…”

Structural, optical and dielectric properties of Cu1.5Mn1.5O4 spinel nanoparticles

“…12b, the spectrum of Z 00 reaches a maximum reecting the presence of relaxation frequencies corresponding to the grains. 83 Here, the peak gradually shis towards higher frequencies when the temperature increases, indicating a thermal activated relaxation process. In order to estimate the activation energy of the contributions of the Cu 1.5 Mn 1.5 O 4 compound, we have plotted in Fig.…”