Dielectric Diffusive and Relaxor Behaviour of SrO Substituted BCZT Ceramics

Ba0.85Ca0.15Zr0.9Ti0.1O3 (BCZT) ceramics possess exceptional dielectric, ferroelectric, and piezoelectric properties, making them a compelling choice for manufacturing microelectronic devices. The BCZT ceramic materials were replaced with Ba0.85Ca0.15–xSrxZr0.9Ti0.1O3. The samples were calcinated at 1150°C for 4 h in a conventional high-temperature muffle furnace. The powders were then sintered in a microwave furnace at 1450°. The cubic structure of the material at room temperature was confirmed using Rietveld X-ray diffraction. Dielectric studies, which were temperature and frequency dependent, showed that the dielectric constant and dielectric loss increased with SrO substitution upto x = 0.10. Relaxor behavior was observed in all Sr-substituted samples. The degree of diffuseness was calculated using the modified Curie–Weiss law.