<title>Pyroelectricity: some new research and application aspects</title>

Abstract

Attention is concentrated on the original results of investigations of pyroelectric effect and related phenomena in various ferroelectric materials (FEM) used for creation of pyroelectric convertors for various purposes including single and multielements pyroelectric detectors of radiation (PDR) of plane and cavity types. Methods of pyroelectric certification developed for both simultaneous determination of pyroelectric, piezoelectric, dielectric and thermal parameters of pyroactive FEM and express selection of sensitive elements of PDR and pyrovidicons in conditions of mass production are considered. The results of amplitude- phase-frequency analysis of dynamic pyroelectric response under near-surface pyroelectric probing of multilayer contact systems based on wide used traditional dielectric FEM, on photosensitive FEM with semiconductive properties and ionic conductivity, namely ferroelectric-semiconductors and ferroelectric-ionics and also polymeric FEM of PVDF-type are presented. The applications of a number of effects connected with high pyroactivity, thermo-, photo- and electrical controllability characteristic for such FEM are discussed. The examples of practical realization of new principles under development of pyro- and photoelectric convertors, pyroelectric devices and units of electronic support are given. The peculiarities of PDR operation in pyroelectric current and voltage mode are discussed.