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

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of ferroelectric piezoceramic materials, which are resistant to electric and mechanical effects, intended for ultrasonic devices and operating under strong electrical and mechanical effects. Material contains oxides of lead, cadmium, zirconium, titanium, manganese, strontium, lanthanum and additionally – cerium, tantalum and antimony oxides, with the following ratio of components, wt%: PbO 63.232÷64.152; CdO 0.098÷0.198; ZrO₂ 18.990÷19.234; TiO₂ 11.143÷11.273; SrO 0.319÷1.814; MnO₂ 0.131÷0.435; La₂O₃ 0.344÷0.366; CeO₂ 0.184÷0.960; Ta₂O₅ 0.691÷1.984; Sb₂O₃ 1.653÷2.799.

EFFECT: obtaining a ferroelectric piezoceramic material with a dense fine-grained structure, which provides improved electrophysical parameters of the material: high mechanical Q-factor Q_m=1,452–1,496, increased dielectric permeability ε^τ₃₃/ε₀=1,488–1,492, high ratios of electromechanical coupling Kp=0,61–0,62; K₃₁=0,37–0,39; K₃₃=0,73–0,76, which increases specific power of piezoelectric transducers based on the disclosed piezoceramic material.

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