The polarization phenomena in α-PbO photoelectret ceramic

The most important of the chemical compounds of lead are the lead oxides. Lead oxides are technologically important because they exhibit obvious photoactivity over a wide range of wavelengths; it is for this reason that they are used in imaging devices, particularly, in production of television pickup tubes of “Plumbicon” type, electrophotographic plates, and ferromagnetic and ferroelectric materials. Complex crystal structures, unusual polymorphic transformations, as well as nonstoichiometric forms of lead monoxide have attracted the efforts of many researchers for almost half of a century. The stoichiometry of lead oxides was a subject of early investigations and a large number of research papers published by this time, where matters were considered related to methods employed when preparing and studying any possible oxides and homogeneous phases that are intermediate in composition interval from red lead Pb₃O ₄ up to lead dioxide PbO₂. Subject of this study are the polarization properties in the tetragonal lead monoxide. The crystallographic features of structure also are considered. Significant influence of the Pb²⁺ electron lone pairs in the area of low temperature phase transitions is supposed to take place