PZTとPbTiO₃との混合セラミック粉末とポリマーとからなる “零d₃₁” 0-3複合材料の水中圧電性能

抄録

Hydrostatic piezoelectric constant d_h of 0-3 composite of polymer and ceramic powder mixture of PZT and PbTiO₃ were investigated in order to obtain “d₃₁-zero” constant by applying appropriate reverse poling field to prepoled ones. The composite composition was of chloroprene rubber (25vol% polymer) and PbTiO₃ (PT) ceramic powder mixture of three kinds of the powder having different average particle sizes (3.3(X), 7.3(Y), and 31.8(Z)μm) with equivolumed X, Y and Z (X=Y=Z=1/3), in which the 7.3μm PbTiO₃ ceramic powder (Y) was partially or fully replaced by a PZT ceramic powder with 7.5μm average particle size (75vol% ceramic powder). An improved d_h-value of 18×10^-12C/N was obtained at the composite in which 80 percent of the 7.3μm PbTiO₃ powder was replaced by the 7.5μm PZT powder.