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Open AccessArticle

Thin Film Coating with Highly Dispersible Barium Titanate-Polyvinylpyrrolidone Nanoparticles

1
Department of Frontier Materials, Nagoya Institute of Technology, Nagoya 466-8555, Japan
2
Inorganic Functional Material Research Institute AIST, Nagoya 463-8560, Japan
3
R&D Center, Noritake Co., Ltd., Miyoshi 470-02, Japan
*
Author to whom correspondence should be addressed.
Materials 2018, 11(5), 712; https://doi.org/10.3390/ma11050712
Received: 4 April 2018 / Revised: 24 April 2018 / Accepted: 26 April 2018 / Published: 1 May 2018
Thin BaTiO3 (BT) coating layers are required in various multilayer ceramic technologies, and fine nanosized BT particles with good dispersion in solution are essential for this coating process. In this work, cubic and tetragonal phase monodispersed BT nanoparticles—which were referred to as LBT and HBT-PVP coated on their surface by polyvinylpyrrolidone (PVP) polymer—were prepared by low temperature synthesis (LTS) and hydrothermal method (HT) at 80 and 230 °C, respectively. They were applied for the thin film coating on polyethylene terephthalate (PET) and Si wafer substrates by a simple bar coating. The thickness of BT, LBT-PVP, and HBT-PVP films prepared by their 5 wt % coating agent on Si are around 268, 308, and 263 nm, and their surface roughness are 104.6, 91.6, and 56.1 nm, respectively. The optical transmittance of BT, LBT-PVP, and HBT-PVP films on PET are 55, 66, and 73% at 550 nm wavelength and the haze values are 34.89, 24.70, and 20.53% respectively. The mechanism of dispersant adsorbed on the BT surface for densification of thin film during the drying process of the film was discussed. View Full-Text
Keywords: BaTiO3; poly(vinylpyrrolidone); dispersion; bar coating; thin film; transmittance BaTiO3; poly(vinylpyrrolidone); dispersion; bar coating; thin film; transmittance
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MDPI and ACS Style

Li, J.; Inukai, K.; Takahashi, Y.; Tsuruta, A.; Shin, W. Thin Film Coating with Highly Dispersible Barium Titanate-Polyvinylpyrrolidone Nanoparticles. Materials 2018, 11, 712.

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