High temperature ion conductivity and associated defects in strontium titanate and lithium niobate
Dielectric properties and conductivity were studied in a SrTiO3 crystal in a temperature range 350 – 900K. Study alsu was carried out at Ar atmosphere. Data for SrTiO3 were compared with data for LiNbO3 single crystals. The data indicate a possibility of defects association. The defects association effect at high temperatures and ionic conductivity do not depend on precise particularities of the crystal’s structure and carrier type: SrTiO3 has a perovskite structure, carrier is O2-; LiNbO3 – pseudo-ilmenite, carrier - Li+.