| Authors |
Moskalev Sergey Aleksandrovich, candidate of technical sciences, deputy general director for quality, development and technologies, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: distorsion@rambler.ru
Cheburachin Igor Nikolaevich, chief technolog, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: distorsion@rambler.ru
Volkov Vadim Sergeevich, candidate of technical sciences, associate professor, senior scientist, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: distorsion@rambler.ru
Kikot Viktor Viktorovich, candidate of technical sciences, head of piezo production center, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: distorsion@rambler.ru
Koshkin Gleb Aleksandrovich, processing engineer, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia), E-mail: distorsion@rambler.ru
|
| Abstract |
Background. The object of the research is to determine the aging coefficient of the piezoelectric sensitive elements characteristics for pressure sensors made from a material – an analogue of PZT-83G.
Materials and methods. The piezoelectric elements were made and their characteristics (capacitance and tangent of dielectric loss angle) were measured during 79 days storage. The dependence of characteristics on time is built and aging factors are determined.
Results. The decrease in the capacitance of the piezoelectric elements is well described by the logarithmic dependence (the correlation coefficient is 0.993). Reducing the dielectric loss tangent of piezoelectric elements is described worse by the logarithmic dependence (the correlation coefficient is 0.311). Since the dielectric losses of a piezoceramic material depend on a variety of environmental parameters: temperature, humidity, etc., the most likely reason for the strong variation of the tangent of the dielectric loss angle of piezoelectric elements over time is the lack of special storage conditions.
Conclusions. From the above calculations it can be seen that the simplest way to increase the temporal stability of the parameters of piezoelements is preliminary exposure at a normal climatically conditions for at least two decades, ie, 100 days. Exposure At the same time, the value of the aging coefficient of the characteristics of the piezoelectric element is no less than twice reduced.
|
| Key words |
piezoelectric sensor, sensitive element, piezo-ceramic PZT-83G, capacitance, tangent of dielectric loss angle
|
