Structure of ferroelectric materials for power transducers

摘要: Abstract The main characteristics of ferroelectric compositions well suited to power transducers are: —a high value the figure merit Mo = (d33 /sE 33)2 —very weak dielectric and mechanical losses under low electric field level. materials generally used are PZT with oxygen vacancies produced by a lower valenced ions substitution in B cationic site. new we have developed based on: —firstly double on site multivalenced such as —secondly manganese ion. electromechanical these given compared standard “hard” piezoceramics: —the permittivity increased internal is decreased unchanged or weaker An interpretation taking into account compensation change oxidation state during cooling valency substituted ions.