Abstract
BaTiO 3 /polycarbonate (BT/PC) composite thin films were prepared by spin coating method. Ultra-fine BaTiO 3 (BT) (∼40–50 nm) nanocrystals with pure perovskite tetragonal phase were synthesized by hydrothermal method. The structure of BT nanocrystals and composite films were studied by means of x-ray diffraction and transmission electron microscopy. The poling condition was optimized through the dielectric properties of BT and PC polymer and effective field intensity theory. The EO coefficients of 20% wt doped BT nanocrystals composite films were evaluated to 34 pm/v. The orientation degree of nanocrystals in PC polymer was estimated by measuring the transparency spectra of unpoled and poled composite thin films.
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