Articles
  • Characterization and properties of BaTiO3/MgO nanocomposite ceramics
  • W.C. Vittayakorna,b*, D. Bunjonga, R. Muanghluac and N. Vittayakornd,e
  • a Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand b Thailand Center of Excellence in Physics, Commission on Higher Education, Ministry of Education, Bangkok, Thailand c Electronics Research Center, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand d College of KMITL Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand e Advanced Materials Science Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
Abstract
In this research, BaTiO3/xMgO nanocomposite ceramics, where x = 0, 0.3, 0.5, 0.7 and 1.0 vol%, were prepared by a mixedoxide method. The effect of MgO additions on the phase formation, microstructure and dielectric properties of this system was investigated via X-ray diffraction (XRD), scanning electron microscopy (SEM) and dielectric spectroscopy, respectively. From the results, XRD analysis showed that there is no unwanted phase except BaTiO3 and MgO observed in these ceramics. Abnormal grain growth was found in pure BaTiO3 ceramic with a 75.32 μm average grain size. After adding MgO nanoparticles into the system, the grain size significantly decreased to 0.55 μm and continuously decreased with increasing MgO content. For the dielectric properties, the pure BT ceramic exhibits a sharp and high dielectric peak whereas a low and broad peak is found in BT/MgO nanocomposite ceramics, which can be explained by the composite structure

Keywords: Barium Titanate, magnesium oxide, Nanocomposite, Dielectric property

This Article

  • 2011; 12(5): 493-495

    Published on Oct 31, 2011