ON THE MATTER OF TECHNOLOGY FOR PRODUCING PIEZOELECTRIC MATERIALS FOR LASER GYROS BY COLD UNIAXIAL PRESSING AND SINTERING

EDN:LYLCNH

Abstract

The results of using piezoelectrictransducers manufactured by Science and Research Institute Measurements NIIFI (Penza) via cold pressing from PZT-LM (NFI-50) material as part of small-sized angular velocity sensors are reviewed. The results of studies of the structure of these elements are presented in comparison with the structure of transducers made of the PZT-19 material, manufactured using cold pressing at the Avrora-ELMA factory (Volgograd), as well as transducers made using hot pressing from the PZT-19 material at "ELPA" company (Zelenograd). The difference in the porosity of materials and the effect of porosity on the reliability of laser gyroscopes are noted. The results of measuring the relative elongation of the material PZT-LM (NFI-50) and sitall SO-115M, andtesting of a piezoelectric transducer in laser gyroscope to establish the temperature characteristics of the PZT-LM (NFI-50) material produced by NIIFI are presented. The results of tests of piezoelectrictransducers SDAI.757681.020-04 manufactured by NIIFI as part of piezo adjusters of laser gyroscope sensors are presented, the hysteresis of informative parameters and the duration of the gyroscope output signal establishment are measured; during 120 hours of operation in the polarization switching mode, the transmission coefficients of the piezo adjusters and their change in the operating temperature range from minus 50 to 75 °C were determined. The possibility of using elements in laser gyroscopes with an increased resource is considered. Possible ways of improving the technology of manufacturing elements using cold pressing in terms of increasing the density of the material are described by modifying the technological modes of milling for mechanical activation of the charge and obtaining the optimal grainsize, synthesis and sintering of the piezoelectric ceramic material to establish the optimal temperature and time conditions for processing the material during its manufacture.