Baranov Aleksandr Mikhaylovich RussiaMoscow MATI – Russian State Technological University named after K. E. Tsiolkovsky, 3, Orshanskaya str. Moscow, 121552, Russiaпроф. д-р техн. наукbaranov_64@mail.ru Author's articles Impedance spectroscopy of potassium polytitanate modified with cobalt salts