• DocumentCode
    1007090
  • Title

    Dielectric properties of Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3 solid solutions

  • Author

    Xu, Yebin ; Liu, Ting ; He, Yanyan ; Yuan, Xiao

  • Author_Institution
    Inst. of Optoelectron. Sci. & Eng., Huazhong Univ. of Sci. & Technol., Wuhan
  • Volume
    55
  • Issue
    11
  • fYear
    2008
  • fDate
    11/1/2008 12:00:00 AM
  • Firstpage
    2369
  • Lastpage
    2376
  • Abstract
    Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3 solid solutions are prepared by a solid-state reaction method, and their dielectric and tunable characteristics are investigated. The solid solutions with cubic perovskite structures are obtained for compositions of 10-50 mol% Sr(Ga0.5Ta0.5)O3. It is observed that the addition of Sr(Ga0.5Ta0.5)O3 into Ba0.6Sr0.4TiO3 causes a shift in the phase transition peak to a lower temperature. Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3 solid solutions exhibit depressed and broadened phase transition peaks, resulting in decreased dielectric constants and dielectric losses at room temperature. With the increase of Sr(Ga0.5Ta0.5)O3 content, the dielectric constant, loss tangent, and tunability are decreased. 0.9Ba0.6Sr0.4TiO3-0.1Sr(Ga0.5Ta0.5)O3 has a dielectric constant epsiv = 534 and a tunability of 16% at 100 kHz under 2.63 kV/mm. The dielectric characteristics of Ba0.6Sr0.4TiO3- Sr(Ga0.5Ta0.5)O3 ceramics at microwave frequencies are also evaluated.
  • Keywords
    barium compounds; dielectric losses; ferroelectric ceramics; ferroelectric transitions; gallium compounds; permittivity; strontium compounds; tantalum compounds; Ba0.6Sr0.4TiO3-Sr(Ga0.5Ta0.5)O3; ceramics; cubic perovskite structures; dielectric constants; dielectric losses; dielectric properties; loss tangent; microwave frequencies; phase transition peak; solid solutions; solid-state reaction method; temperature 293 K to 298 K; Ceramics; Density measurement; Dielectric constant; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Microwave technology; Powders; Temperature; X-ray diffraction; Barium Compounds; Electric Conductivity; Materials Testing; Microwaves; Oxides; Solutions; Strontium; Titanium;
  • fLanguage
    English
  • Journal_Title
    Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-3010
  • Type

    jour

  • DOI
    10.1109/TUFFC.944
  • Filename
    4686868
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1007090