Effect of PZT Particle Size on the Electromechanical Coupling Coefficient of 0-3 PZT-Cement Composites

摘要

PZT-cement composites were produced using PZT ceramic of different particle size (3.8 mu m to 620 mu m). The effect of PZT particle size on the electromechanical coupling coefficient (K_t) of the composites was then investigated. The results showed that the particle size of PZT used to produce the composite has a noticeable effect on the K_t values. The electromechanical coupling coefficient was found to increase with the particle size of PZT used where K_t values are found to be at 16.1 percent and 20.5 percent for composites with median particle size of 3.8 mu m and 620 mu m respectively. Enhanced piezoelectricity can be explained when PZT ceramic particle increased since there would exist a more functioning ceramic (accompanying more PZT grains) and less contacting surfaces between the PZT ceramic and the cement matrix. These would lead to better piezoelectric properties of the composites.