E NH A NCE M E NT O F T H E RMO E L E C T RI C PROPERTIES OF Sr1xLaxTiO3 (x = 0, 0.08, 0.13)
Keywords:
Strontium titanate, solid state reaction, synthesis, substitution, thermoelectric materialAbstract
The n–Sr1–xLaxTiO3 (x = 0, 0.08 and 0.13) materials were synthesized by solid state reaction method to study thermoelectric properties. The nSr1xLaxTiO3 was synthesized formSrCO3, TiO2 and La2O3. The powders were mixed by ball–milling for 2 h, calcined at 1123K for 12 h, pressed into pellet at 4.9 MPa, and sintered at 1773 K for 12 h. It results show that the crystal structure is a single perovskite phase and agrees with PDF#2 00–035–0734.The calculated lattice parameter values of x = 0, 0.08 and 0.13 are 0.3905, 0.3906 and 0.3902nm, respectively. All the pellets of nSr1–xLaxTiO3 have density more than 95%. The Lasubstitution at x = 0.13 gave the best thermoelectric properties and appropriated thermoelectric module fabrication.
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