Microwave synthesis technique for LTCC and colossal dielectric constant in PZT

Abstract

Lead zirconium titanate(PZT) is synthesized at low sintering temperature by microwave sintering to be employed in low temperature co-firing ceramic (LTCC) technique. The density, shrinkage, and bandgap of the PZT samples are found to increase linearly with an increase in sintering temperature from 800 to 900 °C. The Rietveld-refinement studies confirmed the coexistent phases and tolerance factor (t = 0.888) at room temperature for PZT sintered at 900 °C. PZT sintered at 900 °C resulted in a colossal dielectric constant of 19649(100 Hz). The large dielectric constant and optical bandgap in the visible region of the PZT sintered at 900 °C makes it a potential candidate for biomedical device applications.