Investigation of amorphous PbTiO₃ and its crystallization by dielectric and optical method

Abstract

Several physical properties of rapidly quenched samples of PbTiO₃ (not containing glass formers) have been investigated. Measurements of DTA curve, dielectric constant²⁾, Raman scattering and microscopic observations have been made. As already been reported,^1–3) amorphous smaples crystallize on heating (crystallization temperature T_crys ≃ 550°C) and by suitable annealing above T_crys samples gradually recover crystalline physical properties. These changes of the physical properties in the crystallization process have been investigated in more detail and these are discussed in reference both to the grain size³⁾ and to the effects of stress exerted by co-existing fine-grains in the crystallized sample.