KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Ruangphanit, AnuchaSubject: search.filters.subject.Dielectric properties

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Structure and dielectric properties of Bi0.5K 0.5TiO3-SrTiO3 lead-free ceramics
    (2011-01-01)
    Ruangphanit, Anucha
    ;
    Phetnoi, Prapapim
    ;
    Niemcharoen, Surasak
    ;
    Muanghlua, Rangson
    Bismuth potassium titanate - strontium titanate (1-x)Bi<inf>0.5</inf>K <inf>0.5</inf>TiO<inf>3</inf>-(x)SrTiO<inf>3</inf> (BKT-ST) lead-free ceramics when x = 0-0.20 were synthesized by the solid state reaction method with normal sintering. The ferroelectric phase transition was studied by X-ray diffraction (XRD). All compositions showed a single phase perovskite structure with tetragonal symmetry at room temperature and the phase structure transformed from ferroelectric tetragonal - paraelectric cubic in the range of x ≥ 0.10. Dielectric study revealed that the dielectric relaxor behavior was induced with increasing ST and transition temperature (T<inf>m</inf> ε<inf>r max</inf>) of ST-doped BKT had a tendency to decrease with increasing ST. The Bi <inf>0.5</inf>K<inf>0.5</inf>TiO<inf>3</inf>-SrTiO<inf>3</inf> system was expected to be a new and promising candidate for lead-free capacitors. © (2011) Trans Tech Publications.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Preparation and properties of lead free bismuth sodium titanate-bismuth zinc titanate ceramics
    (2009-12-01)
    Muanghlua, Rangson
    ;
    Niemcharoen, Surasak
    ;
    Vittayakorn, Wanwilai C.
    ;
    Tungsitvisetkul, Nattapong
    ;
    Chinwaro, Pimjan
    Lead-free piezoelectric ceramics based on (1-x)Bi1/2Na1/2TiO3 - x Bi(Zn1/2 Ti1/2)O3 (x = 0.0, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20, 0.30, 0.40, and 0.5) were obtained via solid-state processing techniques. The influence of BZT addition on BNT characteristics, sintering, microstructure and properties was investigated. A single perovskite phase with rhombohedral symmetry was obtained for Bi(Zn1/2Ti1/2)O3 substitutions of up to 10 mole%. A small amount of BZT was effective for improving both sintering behavior and dielectric properties of BNT ceramics. Optimized dielectric properties were obtained for samples with a maximum density of ρ = 98.3% for the composition, x = 0.1. Copyright © Taylor & Francis Group, LLC.