Retaining of barium titanate stoichiometry at metallization and soldering of BaTiO₃-ceramic in vacuum

Abstract

Barium titanate have the valuable electrophisical properties but at heating in vacuum to 600^о C BaTiO3 loses the oxygen and its properties varieties. It restricts using of standard metallization and brazing technologies for BaTiO₃-ceramic so the technology of BaTiO₃-ceramic metallization and soldering at lower temperatures was the aim of present study. Technology of capillary infiltration of indium and led through titanium powder was tested. As at prolonged storage on the air titanium powder is dirtied due to adsorption of atmosphere components the just prepared by annealing TiH in vacuum at 700^о C powder was used. For led metallization temperature was 500^о C for indium — 450^о C. Soldered joints of BaTiO₃-ceramic and steel was also obtained by capillary infiltration of indium, strength was 20 MPa. In the experiments with indium barium titanate retain its stoichiometric composition.