Abstract
Samples of piezoelectric cement, consisting of equal volumes of lead zirconate titanate and type I Portland cement, were treated through a heating technique and cured for controlled lengths of time to produce notable piezoelectric properties. Piezoelectric properties were measured by considering curing times of 1, 3, and 7days, and applying 23°C or 140°C treatments on the piezoelectric cement samples. Curing time showed minor effects on the piezoelectric strain factor d33, relative dielectric constant εr, and electromechanical coupling coefficient Kt at late ages for specimens that were cured for more than 3days. Pretreatment with higher temperatures on piezoelectric cement is expected to obtain higher d33 and εr values than posttreatment would obtain. Two heat treatments at 140°C and 1day of curing for piezoelectric cement provide superior d33 and εr values, with d33=110.9pC/N and εr=756 at 100days. However, it is necessary to enhance the Kt of piezoelectric cement at least 3days’ curing.
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