Clamping effect on the piezoelectric responses of screen-printed low temperature PZT/Polymer films on flexible substrates

摘要: This paper introduces a new flexible lead zirconate titanate (PZT)/polymer composite material that can be screen-printed onto fabrics and substrates, investigates the clamping effect of these substrates on characterization piezoelectric material. Experimental results showed optimum blend PZT/polymer binder with weight ratio 12:1 provides dielectric constant 146. The measured value coefficient d33 was found to depend substrate used. Measured d33clp values 70, 40, 36 pC N−1 were obtained from formulation printed Polyester–cotton an interface layer, Kapton alumina respectively. variation in occurs because mechanical boundary conditions substrate. film is mechanically bonded surface this constrains plane (the 1-direction). constraint means perpendicular forces (applied 3-direction) used measure introduce strain 1-direction produces charge opposite polarity induced by effect. due negative sign d31 has reducing value. Theoretical experimental investigations confirm reduction 13%, 50% 55% estimated freestanding d33fs (80 N−1) Polyester–cotton, These demonstrate substrate/PZT response particular reduced fabric their lowered stiffness.