Use of Dielectric Mixtures Formulae for PbTiO\(_3\) Based Glass-Ceramic Systems: An Experimental Analysis

Abstract

This chapter aims to describe about the Application of Dielectric Mixtures Formulae for PbTiO₃ based Glass-Ceramic systems. Using a traditional quenching procedure, glass samples with the composition (50 - X) PbO - (25 + X) TiO₂ - 25 B₂O₃ (where X =0, 5, 10 and 12.5 mol %) were created.  These glass samples underwent two stages of heat treatment in order to become glass ceramics.   Glass and glass ceramic samples were evaluated for density, transition temperature (T_g), crystallization temperature (T_c), and coefficient of thermal expansion (CTE).  T_g and T_c were shown to decrease as TiO₂ content increased. Glass ceramic samples have densities that are higher than corresponding glass samples.  It was noted that the density and CTE results of the glass-ceramics showed a strong association.  Glass ceramic samples have a greater dielectric constant than equivalent glasses.  The theoretically anticipated and experimentally observed values of the dielectric constant were correlated using Maxwell's dielectric mixture formula.