Preparation of 1-3 Piezoelectric Ceramic/Polymer Composites by Ceramic Injection Molding and Their Performance Study

PZT ceramic array was prepared by ceramic powder injection molding. After the array was degreased, sintered, infused with epoxy resin and post processed, 1-3 piezoelectric composites with the 4 ~ 5 ratio of length to diameter were prepared and the piezoelectric properties and mechanical-electronical conversion properties were studied. The results indicated that piezoelectric constant was more than 400 pC/N, at the same level with that of piezoelectric ceramic flake. The ratio of the thickness coupling coefficient k_t to the radial coupling coefficient k_p reached about 2, higher than that of PZT ceramc.