SU471335A1 - Piezoceramic material - Google Patents

Description

The invention relates to piezoelectric materials and can be used to create electromechanical transducers based on the phenomenon of piezoelectricity. In the well-known four-component system, including RvTYu - Rv2sO-PvMV, oi.l l have the following values of dielectric and piezoelectric parameters: B ti, j (3.6-9.38). units 1090-4260; CGSE. Famous piezoceramics is characterized by a high sintering temperature: 1100-1240 In connection with the volatility of the PBB at high temperatures and in connection with the need to obtain developed piezoceramics in industrial conditions, it is very important to significantly reduce the sintering temperature. In addition, for some applications, such as hydroacoustics, it is important to obtain new. Soft materials with elevated ones. piezoparameters. The purpose of the invention is to significantly reduce the sintering temperature and increase the piezoelectric (d.) And dielectric (31 parameters). This is achieved by addition of ShTl O and one oxide, taken from the group La , StO with the following content of 2 o "initial components, mol.%: 29.627 - 37.315 PbT10" about 33.514 - 37.873 Pb 2 // 9l / 3 ° 3 13.957 - 15.792, 9.327 - 10.527 4.937 - 4.976 SfTlO ;, sour from the group Ta -, О, La О, §1О "о. 5.492-1.244. Modified compositions synthesize O by the usual Ke1.amic technology at OO ° C in the protective atmosphere of PBO. SPECA