Synthesis and Electrophysical Properties of Ceramic Nanocomposites Based on Potassium Polytitanate Modified by Chromium Compounds

Resumo

The thermal behavior of potassium polytitanate modified in a water solution of CrCl₃ in 4 and 18 h and characterized by different degree of uniformity of the chromium distribution in the particles is investigated. It is shown that even though the powder precursors have close chemical compositions their heat treatment (at 850°C for 2 h) leads to the formation of ceramic nanopowders with different phase compositions. It is shown by means of impedance spectroscopy that the product obtained on the basis the precursor powder with lower uniformity of the chromium distribution has much higher permittivity.