Effect of Heating Rate and $V_2O_5$ Addition on Densification and Electrical Properties of $Pb(Mn_{1/3}Sb_{2/3})O_3-PZT$ Ceramics for Piezoelectirc Transformer

압전변압기용 $Pb(Mn_{1/3}Sb_{2/3})O_3-PZT$ 세라믹스에서 승온속도 및 $V_2O_5$ 첨가가 치밀화 및 전기적 특성에 미치는 영향

The effect of V2O5 addition on the low temperature sintering of Pb(Mn1/3Sb2/3)O3-PZT ceramics, which is known as a prominent material for piezoelectric transformer application was studied, and the densification behavior and piezoelectric characteristics of the samples as a function of heating rate were also examined. V2O5 led the system to liquid phase sintering by forming liquid phase during sintering, which accelerated densification through the particle rearrangement in the early stage of sintering. The liquid phase mostly existed at grain boundaries retarded the evaporation of PbO, while the densification temperature and the weight loss of V2O5-free samples were higher than those of samples with V2O5. Faster heating improved the densification of the samples regardless of V2O5 addition. The low temperature sintering at 100$0^{\circ}C$ was achieved in PMS-PZT ceramics with high density and reasonable dielectric and piezoelectric characteristics. This result revealed optimistic way to the development of multi-layered piezoelectric transformers.