Author/Authors :
Cho، نويسنده , , C.-W. and Cha، نويسنده , , M.R. and Jang، نويسنده , , J.Y. and Lee، نويسنده , , S.H and Kim، نويسنده , , D.J. and Park، نويسنده , , S. and Bae، نويسنده , , J.S. and Bu، نويسنده , , S.D. and Lee، نويسنده , , S. and Huh، نويسنده , , J.، نويسنده ,
Abstract :
The Ba0.5Ca0.5TiO3 (BCT) composition dependent dielectric and structural properties of (1−x)K0.5Na0.5NbO3–xBa0.5Ca0.5TiO3 powders were investigated. Room temperature x-ray diffraction revealed the powder structure to transform from orthorhombic to cubic with increasing BCT composition. The frequency dependent dielectric constant measurements revealed a shift in the temperature of the maximum dielectric constant for at frequencies, suggesting that the system exhibits ferroelectric relaxor behavior. The system containing 15% BCT showed the closest calculated Curie–Weiss exponent to 2, which the exponent for a relaxor ferroelectric.
