Thermoelectric properties of CuO-LiCoO2‑La0.7Sr0.3MnO3 composition materials

For the widespread use of thermoelectric materials, it is necessary to reduce their cost, simplify technology and increase figure merit, which highly dependent on Seebeck coefficient. Therefore, one promising directions search for composites effective converters. In our article, three-component consisting a conductive component La0.7Sr0.3MnO3, (LSMO), dielectric components: mixture CuO oxides lithium cobaltite LiCoO2 have been prepared experimentally investigated as such materials. The phase composition obtained samples was studied by X-ray diffraction, electron optical microscopy. properties composite materials in field low temperatures from 30 250°C. best results coefficient 550 μV / K power factor 0.108 μW (K2 ∙ m) are shown selected compositions containing about 25 % weight LSMO, 40 CuO, LiCoO2, 5 GeO2. However, largest value (1.859 achieved sample 77 20 3 GeO2 with 310 K. It should be noted that three-phase “p”-type conductivity. presence glass-forming germanium (3 – %) oxide gives great mechanical stability.