Optical and dielectric properties of poly(vinylacetate)/lead oxide composites

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• 作者：M. Abdelaziz (12) mabdelaziz62@yahoo.com
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：23
• 期：7
• 页码：1378-1386
• 全文大小：399.4 KB
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• 作者单位：1. Natural Science Department, Riyadh Community College, King Saud University, P.O. Box 28095, Riyadh, 11437 Kingdom of Saudi Arabia2. Physics Department, Faculty of Science, Mansoura University, Mansoura, 35516 Egypt
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

Composite films of poly(vinylacetate)/red lead oxide have been prepared by mixing the fine lead oxide particles into polyvinylacetate solution under ultrasonication followed by film casting technique. Structural, optical and dielectric properties have been performed to characterize these composites films and compared their properties to pure PVAc film. The changes in the structural of the prepared films were investigated by X-ray diffraction (XRD) and FT-IR spectra. It has been observed that the crystallinity of the composites films depends on the Pb-content. Optical spectra of the composites films showed direct allowed band gaps lying in the range of 5.0–4.6 eV which is lower than that of PVAc. Frequency and doping level dependence of dielectric constant (ε′), ac conductivity (σ_ac) and tangent loss (tanδ) have been measured. The values of ε′ were decreased with increasing in frequency, which indicates that the major contribution to the polarization comes from orientation polarization. The ac conductivity is more for doped PVAc than that of undoped PVAc. The experimental results show that ε′ and σ_ac increase with adding of lead oxide in PVAc. The controllable of optical and dielectric properties of the composite film will draw much attention for potential applications.