PIEZOCERAMIC MATERIAL Russian patent published in 2019 - IPC C04B35/491 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the field of ferroelectric piezoceramic materials intended for ultrasonic devices operating in the reception mode of various piezoelectric sensors. Piezoceramic material, including oxides of lead, zirconium, titanium, strontium, bismuth and germanium, additionally contains oxides of barium, calcium and gadolinium in the following ratio of components, wt. %: ZrO₂ 19.16÷19.90; TiO₂ 11.02÷11.90; SrO 0.14÷0.75; Bi₂O₃ 0.22÷0.82; GeO₂ 0.10÷0.30; BaO 0.15÷0.75; CaO 0.15÷0.55; Gd₂O₃ 0.20÷0.60.

EFFECT: technical result is that piezoceramic material with improved electrophysical parameters has been obtained: increased thermal stability of the dielectric constant Ktε₃₃=(2,35–2,48)⋅10^-3 °C^-1 with its high values ε₃₃=2,081–2,086.

1 cl, 2 tbl