Synthesis and dielectric properties of K1.6Fe1.6Ti6.4O16 ceramics produced by the Pechini method

Potassium titanate modified with Fe3+ ions matching the stoichiometry of K1.6Fe1.6Ti6.4O16 (KFTO) was obtained by polymer complex precursor method (Pechini method). The phase composition and morphology sample were characterized using XRD, laser diffraction, SEM technique. X-ray analysis shows single-phase formation potassium a tetragonal hollandite-like structure. Rietveld used to clarify crystal lattice parameters. parameters are: = b 10.1510 Å и c 2.9659 Å. results diffraction showed that particles studied nanopowder have cubic shape an average size 400 nm. dielectric properties in frequency range 0.1 Hz 1.0 MHz for ceramic disks sintering compressed at 1080 oC. It found ceramics based on KFTO solid solutions high permittivity low losses increased polarizability. polarizability material is explained relatively mobility K+ tunnel considered hollandite structure accompanied redistribution electrons lattice. A discussion contribution various processes presented.