• DocumentCode
    3150440
  • Title

    Ferroelectric ceramics in the Na0.5Bi0.5TiO 3-K0.5Bi0.5TiO3, Na0.5 Bi0.5TiO3-PbTiO3 and K0.5 Bi0.5TiO3-PbTiO

  • Author

    Elkechai, O. ; Mercurio, J.P.

  • Author_Institution
    Lab. de Mater. Ceramiques et Traitements de Surface, CNRS, Limoges, France
  • fYear
    1991
  • fDate
    33457
  • Firstpage
    253
  • Lastpage
    256
  • Abstract
    The study of the Na0.5Bi0.5TiO3-K 0.5Bi0.5TiO3, Na0.5Bi0.5TiO3-PbTiO3 and K 0.5Bi0.5TiO3-PbTiO3 systems was carried our using X-ray diffraction, DSC and dielectric measurements. The limits of the rhombohedral (Na0.5Bi0.5 TiO3-rich side) and orthorhombic (K0.5Bi0.5TiO3, and PbTiO3-rich side) solid solutions were determined, as well as the evolutions of their lattice parameters as a function of composition. Ceramic materials have been prepared by natural sintering (1090-1220°C/0.5 h) of powders obtained by solid state reaction (900-1000°C/20 h) of the corresponding oxides and carbonates. The dielectric permittivities of these materials have been measured in a wide frequency range between 20 and 800°C. The results showed that they all are ferroelectric at room temperature and some of them exhibit a relaxer-type behaviour. Several specular compositions showed the best piezoelectric characteristics for this type of ceramic materials
  • Keywords
    X-ray diffraction; bismuth compounds; ferroelectric materials; lattice constants; lead compounds; permittivity; piezoceramics; piezoelectric materials; potassium compounds; sodium compounds; thermal analysis; 1090 to 1220 degC; 20 to 800 degC; 900 to 1000 degC; DSC; K0.5Bi0.5TiO3-PbTiO3; Na0.5Bi0.5TiO3-K0.5Bi0.5TiO 3; Na0.5Bi0.5TiO3-PbTiO3; X-ray diffraction; ceramic materials; composition; dielectric measurements; dielectric permittivities; ferroelectric ceramics; lattice parameters; orthorhombic phase; piezoelectric characteristics; relaxer-type behaviour; rhombohedral phase; room temperature; sintering; solid state reaction; Bismuth; Ceramics; Dielectric materials; Dielectric measurements; Ferroelectric materials; Lattices; Organic materials; Powders; Solids; X-ray diffraction;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
  • Conference_Location
    University Park, PA
  • Print_ISBN
    0-7803-1847-1
  • Type

    conf

  • DOI
    10.1109/ISAF.1994.522351
  • Filename
    522351
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3150440