Abstract
A temperature stable high dielectric constant Ba4La3.73Sm4.66Bi0.93Ti18O54 ceramic was synthesized by conventional solid state route. The structural and micro-structural properties were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The compound crystallizes in the orthorhombic system with unit cell parameters as a = 12.56Å, b = 22.25Å, c = 3.83Å and v = 1070.33Å3. The microwave dielectric properties were measured in the frequency range 0.3 to 3.0 GHz using a network analyzer and it shows a high dielectric constant of 86.1 and low loss tangent of 4.3 × 10–3 at 3.0 GHz along with a very low temperature coefficient of resonant frequency of 4.3 ppm/°C. It could be a promising candidate to be used as dielectric resonator in microwave communication.
Acknowledgments
Communicated by Dr. Deborah J. Taylor