Microstructure, chemical composition, and dielectric response of CaCuTiO ceramics doped with F, Al, and Mg ions.

Ceramics with nominal chemical composition CaCuTiO (CCTO), CaCuTiAlOF (CCTOAF), and CaMgCuTiAlOF (CCTOMAF) were prepared by the solid-state reactions technique. Using SEM, EDX, XPS, EPR, NMR, and complex impedance spectroscopy, the microstructure, elements distribution, chemical composition of grains and grain boundaries, and the dielectric response of ceramics were investigated. In the ССТО, CCTOAF, and CCTOMAF series, the average grain size increases, the degree of copper segregation at the grain boundaries is inversely related to grain size, and the dielectric loss decreases from 0.

Modified Pechini Processing of Barium and Lanthanum-Lithium Titanate Nanoparticles and Thin Films.

Barium-strontium titanate (BST) BaSr TiO and lanthanum-lithium titanate (LLT) LaLiTiO nanopowders and thin films have been obtained via the modified Pechini route. Polyesterification and complexation processes of gel formation have been examined. Hypothetical models of coordinative polymers formed in sol-gel system have been suggested.