KMITL

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

Browse

Settings

Subject: search.filters.subject.KNN-LS-BF ceramics

Search Results

Now showing 1 - 1 of 1
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Optimum conditions for fabrication high-density KNN-LS-BF ceramics by combustion method
    (2013-12-01)
    Panya, Peerapong
    ;
    Wattanawikkam, Chakkaphan
    ;
    Laowanidwatana, Artid
    ;
    Vittayakorn, Naratip
    ;
    Bongkarn, Theerachai
    The 0.996(0.95K<inf>0.5</inf>Na<inf>0.5</inf>NbO<inf>3</inf>-0.05LiSbO <inf>3</inf>)-0.004BiFeO<inf>3</inf> (KNN-LS-BF) ceramics were prepared by the combustion method using glycine as a fuel. The raw materials were mixed and calcined at various calcination temperatures (650-750°C) with different dwell time (0.5-3 h). Then, the calcined powders were pressed and sintered at various temperatures (1000-1100°C) with 0.5-4 h dwell time. The highest % perovskite orthorhombic phase was found in powder calcined at 700°C for 1 h. For the sintered pellets, the orthorhombic structure was found in ceramic sintered at 1075°C for 2 h using heating and cooling rate of 10°C/min. The SEM photographs showed square or rectangular morphology. The average grain size increased with the increasing of soak time. The highest densisty (4.47 g/cm<sup>3</sup>), maximum dielectric constant (ε<inf>r</inf> = 6180) and lowest dielectric loss (tanδ = 0.1) at T<inf>c</inf> were obtained in the sample sintered at 1075°C for 3 h. The densest sample showed the P <inf>r</inf> = 14.3 μC/cm<sup>3</sup> and E<inf>c</inf> = 20.68 kV/cm at 40 kV/cm. © 2013 Copyright Taylor and Francis Group, LLC.