COMPOSITE PIEZOELECTRIC CERAMIC MATERIAL Russian patent published in 2016 - IPC C04B35/493 H01L41/187 

FIELD: ceramic industry.

SUBSTANCE: invention relates to composite piezoelectric ceramic materials based on oxygen-octahedral type phases and can be used for making hydroacoustic devices, as well as microwave and ultrasonic devices, devices for accurate positioning of objects (lithography, tunnel focused-beam microscopes), etc. Composite piezoelectric ceramic material contains: phase A, obtained from PbO, ZrO₂ and TiO₂ with following ratio of components, in molar ratio (PbO:ZrO₂:TiO₂):[1:(0.33-0.39):(0.61-0.67)]; phase B obtained from PbO, ZnO, NiO·nH₂O and Nb₂O₅ at following ratio of components, in molar ratio (PbO:ZnO:NiO·nH₂O:Nb₂O₅):[1:(0.08-0.12):(0.22-0.25):0.33], where n = 1-3; phase C, obtained from PbO, Fe₂O₃·mH₂O and Nb₂O₅ at following ratio of components, in molar ratio (PbO:Fe₂O₃·mH₂O:Nb₂O₅):[1:0.25:0.25], where n = 1-3. Content of phases A, B and C in system in molar ratio is [(1-k/2) (0.54-0.6) A]+[(1-k/2)(0.4-0.46) B]+[kC], where k = 0.01-0.10.

EFFECT: technical result is increased values ε^T ₃₃/ε, piezoelectric moduli and given parameters, determining efficiency of piezoelectric materials with preservation of high values K_p.

1 cl, 3 ex, 4 tbl, 5 dwg