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The effect of adding a Li2SiO3 (LSO) sintering aid for low temperature fabrication of BaTiO3 (BT) thick films was investigated. LSO-added BT thick films were prepared by the screen printing method on Pt-coated ZrO2 substrates. Their sintering properties were significantly improved by the addition of LSO, and the relative density of the BT thick film fired in air at 1200°C was 96%. The secondary phase was not observed. The dielectric, ferroelectric, and piezoelectric properties of the LSO-added BT thick films were examined. A typical ferroelectric hysteresis loop was observed, and the remnant polarization (P r) was 7.5 µC/cm2. The dielectric constant was 3200, and tan δ was 2.1%. The maximum piezoelectric constant d 31 calculated from the displacement of the Pt/BT/Pt/ZrO2 monomorph cantilever was -140 pm/V, and d 33 measured with an atomic force microscope was 320 pm/V.
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Nakaiso et al. (2005) studied this question.
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