PIEZOELECTRIC CERAMIC MATERIAL Russian patent published in 2013 - IPC C04B35/495 

FIELD: chemistry.

SUBSTANCE: invention relates to piezoelectric ceramic materials based on sodium niobate and can be used in making low-frequency receivers - hydrophones, microphones, hydro receivers, as well as in making low-frequency electromechanical transducers, which excite metallic resonators with high sound speed. The piezoelectric ceramic material contains sodium, potassium, cadmium and niobium oxides, with the following ratio of components, wt %: Na₂O 8.75-9.72, K₂O 5.31-5.38, CdO 9.15-10.88, Nb₂O₅ 75.05-75.77. The material is produced using conventional ceramic processing.

EFFECT: material has high relative permittivity of polarised samples, sound speed and mechanical Q-factor.

3 ex, 5 tbl