METHOD OF PRODUCING PIEZOCERAMIC MATERIAL BASED ON LEAD ZIRCONATE-TITANATE Russian patent published in 2017 - IPC C04B35/491 C04B35/626 C01B13/36 

FIELD: chemistry.

SUBSTANCE: invention relates to a technology of producing piezoceramic material, CTC-19, which can be used as a piezocomponent of composite materials with connections 1-3 and 3-3 used in receiving equipment in hydroacoustics and medicine. To produce the initial blend, titanium-zirconium oxide Ti_0.47Zr_0.53O₂ is pre-synthesized by the method of chemical coprecipitation from nitric acid solutions of titanium and zirconium (H₂[Zr(NO₃)₆], H₂[Ti(NO₃)₆]) taken in the ration of Ti⁴⁺/Zr⁴⁺ = 0.47/0.53, with a heat treatment at a temperature of 800-950°C and a holding time of 2-4 hours. Synthesized ultrafine powder Ti_0.47Zr_0.53O₂ is mixed with fine powders PbO, Nb₂O₅ and SrCO₃. Local mechanical stresses on the developed surfaces of the division of ultradispersed powders when interacting with fine powders during the synthesis of the solid solutions of the CTC-system lead to the formation of pseudomorphic regions, the facilitation of the domain wall motion, the reorientation of the polarization, and the change of the associated electrophysical properties.

EFFECT: increasing the specific sensitivity of the piezoelectric module while maintaining the values of the relative permittivity.

5 cl, 2 dwg, 2 tbl