Abstract
Ceramic oxide compositions based on R-P phases, Sr-2(Srn-1TinO3n+1); where n = 1,2 and 3 were prepared by solid-state reaction method. Materials with higher density could be obtained at higher calcination and sintering temperatures of 1573 K, 1623 K respectively. Formation of perovskite type SrTiO3 and single phase R-P (Ruddlseden-Popper) phases were confirmed by X-ray diffraction pattern. The structural features were investigated in detail by various techniques such as TG-DSC, Raman and HR-TEM techniques. Electrical properties studied by Hall measurement set up with four probe method confirm the as prepared ceramics is n-type thermoelectric. Structural and electrical properties analysis shows that these ceramic oxide compositions are promising and potential catalyst for renewable thermo electric device applications