Abstract
The effect of powder pretreatment on lead zirconate titanate (PZT) coatings was reported. Annealed powder and the annealed powder of ball milling were used to form PZT coating by vacuum cold spraying. The results show that the coatings were prepared successfully. The thickness range of coatings were 11 μm–13 μm. The d33 values of annealed powder coating and untreated powder coating are 11 pC/N and 55 pC/N. The remnant polarizability (Pr) and dielectric constant (εr) of the PZT coatings exhibited the same trend as that of d33. The PZT coatings formed with annealed powder existed looser agglomerate structures. The agglomerated powder has obvious influence on the performance of PZT coating. The density of coating with milled after annealing powder is higher than that of coating with annealed powder, which was due to the dispersion of agglomerates. The reduction of porosity can improve the electrical properties.
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