KMITL

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

Browse

Settings

Access type: UnknownAuthor: search.filters.author.Sittiketkorn, Panadda

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    The effect of firing temperatures on (Pb0.75Ba 0.25)(Zr0.70Ti0.30)O3 ceramics prepared via the combustion technique
    (2013-12-01)
    Sittiketkorn, Panadda
    ;
    Wongtey, Pongkiti
    ;
    Vittayakorn, Naratip
    ;
    Bongkarn, Theerachai
    The (Pb0.7<inf>5</inf>Ba0.2<inf>5</inf>)(Zr<inf>0.70</inf>Ti <inf>0.30</inf>)O<inf>3</inf> (PBZT) ceramics were prepared via the combustion technique. (CO(NH<inf>2</inf>)<inf>2</inf>) was used as a fuel. The effect of firing temperature on PBZT's phase formation, microstructure and electrical properties were investigated. The calcination and sintering temperatures were 600°C-1000°C and 1100°C-1300°C. The pure rhombohedral perovskite was obtained from the powders calcined at 850°C. The average particle size tended to increase with increased calcination temperatures. A pure rhombohedral perovskite phase was found in all pellet samples. The average grain size and linear shrinkage tended to increase from 0.57 to 2.15 μm and from 6.8 to 15.8% with increased sintering temperatures. The dielectric results indicated the relaxer behavior of PBZT ceramics. The Curie temperature tended to decrease with increasing sintering temperatures. The highest density (∼7.39 g/cm <sup>3</sup>) and highest dielectric constant (∼8620) were obtained by using the combustion technique which was higher than the conventional mixed oxide method. © 2013 Copyright Taylor and Francis Group, LLC.
      2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Influence of sintering temperature on phase formation, microstructure and dielectric properties of calcium and strontium Doped BNT ceramics prepared via combustion technique
    (2013-01-01)
    Sittiketkorn, Panadda
    ;
    Laowanidwatana, Artid
    ;
    Vittayakorn, Naratip
    ;
    Bongkarn, Theerachai
    Influence of sintering temperature on phase formation, microstructure and dielectric properties of calcium and strontium doped BNT ceramics (BNTST20 and BNTCT2) were investigated. The BNTST20 and BNTCT2 ceramics were prepared using the combustion technique. The structural phase of the BNTST20 ceramics indexed in a cubic phase, while the BNTCT2 ceramics indexed in a rhombohedral phase. The average grain size tended to increase with increasing sintering temperature. The density and the dielectric constant at Curie temperatures increased with increasing sintering temperature up to 1200°C and 1150°C, thereafter they decreased for BNTST20 and BNTCT2 ceramics, respectively. Moreover, the highest density (5.59 and 5.57 g/cm<sup>3</sup>) ceramics exhibited the highest dielectric constant at Curie temperatures (∼4733 and ∼3218) for BNTST20 and BNTCT2, respectively. The ferroelectric properties were also investigated. © 2013 Copyright Taylor and Francis Group, LLC.
      1