PBSZT大功率压电陶瓷介温特性的研究

Study on Dielectric Constant-temperature Properties of PBSZT Piezoelectric Ceramics for High Power Applications

为制备高性能、低损耗、高居里温度适于大功率应用的PZT基压电陶瓷,对Pb0.9Ba0.05Sr0.05(Sn1/3Nb2/3)0.06(Zn1/3Nb2/3)0.06Ti0.44Zr0.44O3+0.5%Mn(NO3)2(质量分数)体系材料进行Sb2O3掺杂改性。结果表明,随着掺杂量增加,居里温度和介电常数均降低。而再添加ω(CeO2)=0.7%,掺杂后能得到较高的介电常数(rε=1783),更低的介电损耗(tanδ=0.41%)和较优的压电性能(d33=294),能满足大功率应用的要求。

For preparing high properties, low dielectric loss and high Curie temperature piezoelectric ceramic materials for high power applicatiom, the Pb0.9Ba0.05Sr0.05（Sn1/3Nb2/3）0.06（Zn1/3Nb2/3）0.06Ti0.44Zr0.44O3＋0.5%Mn（NO3）2 （mass fraction） piezoelectric ceramic materials modified with Sb2O3 are studied. The results show that the dielectric constant and Curie temperature decrease with Sb2O3 doping content increasing. The ceramics with higher dielectric constant （ εr = 1783 ）, high Curie temperature （ Tc ≥ 231 ℃ ）, low dielectric loss （ tanδ = 0.41% ） and high piezoelec- tric properties （ d33 = 294 pC · N^-1 ） are gained when more 0.7% CeO2 is doped in, which are fit for high power applications.