RESPONSE OF PZT-ROD PERIODICITY IN PIEZOELECTRIC POLYMER STRUCTURE BASED ON DENSITY OF THE COMPOSITE AND VOLUME PERCENT PZT IN COMPOSITE

Abstract

Response of PZT-rod periodicity in piezoelectric polymer structure to the density of the composite and volume percent PZT in composite was evaluated, using derived empirical model; ?  =  ??^-? + N?^-?  - ?. The validity of the model is strongly rooted on the core model structure; ? - N?^-? ? ??^-? - ?, both sides of which are correspondingly near equal. The model-predicted results agree with previous research on the inverse relationship between the PZT rod periodicity and density of composite & volume fraction of PZT rod in composite. The correlations between the periodicity of PZT-rod in polymer structure and volume percent of PZT in composite & density of composite were all > 0.99. The standard error incurred in predicting the model based PZT rod periodicity, relative to the actual results was < 0.023%, implying over 99% model confidence level.  The periodicity of PZT rod per unit volume fraction of PZT rod in composite and per unit density of the composite were -0.042 & – 0.043 mm/% and -0.533 & – 0.546 mm/ (gm/cc), using experimental and model-predicted results respectively. The overall maximum deviation of the model-predicted periodicity of PZT rod from actual results was 2.56%. The derived model will predict the periodicity of PZT rod, within the actual results range, on substituting into the model, values of the density of composite and volume fraction of PZT rod in composite, providing the boundary conditions are considered.

KEYWORDS: PZT-rod periodicity, piezoelectricity, polymer structure, density, PZT volume percent, composite