PIEZOELECTRIC CERAMIC MATERIAL Russian patent published in 2012 - IPC C04B35/499 H01L41/187 

FIELD: chemistry.

SUBSTANCE: invention relates to piezoelectric ceramic materials based on lead titanate and can be used in low-frequency receivers - hydrophones, microphones, seismic receivers, as well as in medical diagnosis devices working on a load with low input resistance. The piezoelectric ceramic material based on lead titanate contains lead, niobium, barium, magnesium, nickel and zinc oxides, with the following ratio of components in wt %: PbO 66.58-66.71; Nb₂O₅ 19.17-19.82; TiO₂ 7.23-7.86%; BaO 2.41-2.42%; MgO 1.89-1.96%; NiO 1.14-1.18; ZnO 0.83-0.86.

EFFECT: material has high piezoelectric modulus and relative permittivity of polarised samples with sufficiently high electromechanical coupling factor of the planar oscillation mode, specific sensitivity, low mechanical Q-factor and sound speed.

2 tbl, 2 ex