Influence of Ceramic Particle Size on Piezoelectric Properties of Cement-Based Piezoelectric Composites

摘要

Cement-based piezoelectric composites with 0-3 connectivity pattern were fabricated from lead, lithium niobate-lead zirconate-lead titanate (PLN) and sulphoaluminate cement. The influences of PLN particle size on the electromechanical coupling and piezoelectric properties of composites were discussed in detail. The results show that under the conditions of the same PLN content and fabrication technique, the piezoelectric strain factor d_(33) and piezoelectric voltage factor g_(33) increase with increasing the PLN particle size. When the PLN particle size is larger than 100 mum, d_(33) and g_(33) are hardly influenced by the PLN particle size. Electromechanical coupling coefficient K_p and K_t are shown to be independent of the PLN particle size, while mechanical quality factor Q_m decreases with increasing the PLN particle size.