E.K. Abdel-Khalek

Dielectric and Pyroelectric Properties of BaTiO3 Embedded in Li2B4O7 Glass Matrix

Glass sample with the composition 80 Li2B4O7–20 BaTiO3 (in mol%) was prepared by the conventional melt quenching technique. Amorphous and glassy characteristics of the sample were established via X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC) respectively. The precipitated BaTiO3 nanocrystal phase embedded in the glass sample was identified by transmission electron microscopic (TEM) and infrared absorption spectroscopy. The phase transition (ferroelectric–paraelectric) in the present sample was established through the detailed studies of DSC, dielectric constant, dielectric loss, ac conductivity, dc conductivity and pyroelectric properties. The results demonstrate that the method presented may be an effective way to improvement of pyroelectric properties which is beneficial to the development of pyroelectric detectors.