摘要
The Ba0.5Ca0.5TiO3 (BCT) composition dependent dielectric and structural properties of (1鈭?em>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.