High curie temperature piezoelectric ceramics

High-performance curie temperature piezoelectric ceramics are produced in 2001, the PbTiO3 (PT) with BiScO3 composite first prepared curie temperature is higher than the Pb (Zr, Ti) O3 (PZT)  piezoelectric disc crystal, and the piezoelectric Piezoelectric ceramics with the same performance as PZT ceramics are given.The piezoelectric properties of BSPT ceramics with different compositions are given.The BSPT system has high curie temperature Tc, high dielectric and piezoelectric properties at MPB, Of PbTiO3 has excellent piezoelectric sensor price due to d33 = 460pC / N and kP = 0.56.BSPT .which can be used for a higher temperature than PZT due to the fact that the curie temperature Tc of BSPT is approximately 100 deg.which is the higher than that of PZT, High Curie temperatures are a common feature of alkali metal niobate ferroelectric materials, but pure RNbO3 (R = Li, Na, K) ceramics, on the other hand, which are difficult to obtain by conventional sintering in the atmosphere because alkali metals Oxide has a certain mobility at high temperature, which to a certain extent, high frequency piezoelectric transducer is affecting the crystallization properties of sintered ceramics and ceramic densification .From 2004 to 2005,Materials scientists have successfully prepared high-temperature piezoelectric ceramic materials of NbO3 system with curie point Tc = 450 ℃ and d33 = 230pC / N by using new preparation techniques such as reactive grain-oriented growth (RTGG), making (1 -x) LiNbO3- The x (Na, K) NbO3 ceramic system has become one of the hot topics in the research of new high curie temperature piezoelectric ceramics. In this paper, the latest progress has application of piezoelectric ceramics at home and abroad in recent years are summarized, and a series of piezo tubes transducer measures to make the application of piezoelectric ceramics more fully in production practice are introduced, piezoelectric ring transducer is including lead zirconate titanate (PZT ) Piezoelectric ceramics, lead-free bismuth multilayer piezoelectric ceramics, bismuth sodium titanate (BNT) piezoelectric ceramics and barium titanate (BaTiO3) piezoelectric ceramic systems. Finally, the future development has trend of piezoelectric ceramic .piezoelectric plate sensor materials is also briefly introduced.