Influence of cement matrix on properties of 1–3–2 connectivity cement-based piezoelectric composite Available to Purchase

In order to develop cement-based piezoelectric intelligent composites suitable for concrete structural health monitoring, 1–3–2 type piezoelectric composites were fabricated by using piezoelectric ceramic as the functional component and epoxy resin and different kinds of cement as the matrix. The properties of the composites were studied. The results show that, compared with pure piezoelectric ceramic, the relative dielectric factor ε₃₃ of the composite decreased while the dielectric loss tan δ₃₃ increased. The planar electromechanical coupling coefficient K_p, mechanical quality factor Q_m and acoustic impedance Z of all the composites decreased, while the thickness electromechanical coupling coefficient K_t increased. The composite with ordinary Portland cement matrix had the largest values of ε₃₃, tan δ₃₃, K_t and d₃₃ (piezoelectric strain factor).