• DocumentCode
    1532704
  • Title

    Microstructure and dielectric tunable properties of Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composite

  • Author

    He, Yanyan ; Xu, Yebin ; Liu, Ting ; Zeng, Chunlian ; Chen, Wanping

  • Author_Institution
    Inst. of Optoelectron. Sci. & Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
  • Volume
    57
  • Issue
    7
  • fYear
    2010
  • fDate
    7/1/2010 12:00:00 AM
  • Firstpage
    1505
  • Lastpage
    1512
  • Abstract
    Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composite ceramics were prepared by a solid-state reaction method and their dielectric tunable characteristics were investigated for the potential application as microwave tunable materials. The addition of Mg2SiO4-MgO into Ba0.6Sr0.4TiO3 forms ferroelectric (Ba0.6Sr0.4TiO3)-dielectric (Mg2SiO4-MgO) composites and shifts the Curie temperature to a lower temperature. The dielectric constant and loss tangent of Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composites have been decreased and the overall tunability is maintained at a sufficiently high level. The microwave dielectric properties of Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composites were evaluated. Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composites have tunability of 9.2 to 10.5% at 100 kHz under 2 kV/mm, indicating that it is a promising candidate material for tunable microwave applications requiring a low dielectric constant.
  • Keywords
    barium compounds; composite materials; crystal microstructure; dielectric losses; ferroelectric Curie temperature; ferroelectric ceramics; magnesium compounds; microwave materials; permittivity; strontium compounds; Ba0.6Sr0.4TiO3-Mg2SiO4-MgO; Curie temperature; composite ceramics; dielectric constant; dielectric tunable properties; ferroelectric-dielectric composites; loss tangent; microstructure; microwave dielectric properties; microwave tunable materials; solid-state reaction method; tunability; tunable microwave applications; Ceramics; Composite materials; Dielectric constant; Dielectric materials; Ferroelectric materials; Microstructure; Microwave theory and techniques; Solid state circuits; Strontium; Temperature;
  • fLanguage
    English
  • Journal_Title
    Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-3010
  • Type

    jour

  • DOI
    10.1109/TUFFC.2010.1581
  • Filename
    5507653
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1532704