PROSPECTS FOR THE USE OF COMPOSITE RESISTORS IN THE HARDWARE OF INFORMATION AND MEASUREMENT SYSTEMS

• Published in: Надежность и качество сложных систем no. 4
• Main Authors: Dorosinskiy, A.Yu, Prokof'ev, O.V., Semochkina, I.Yu
• Format: Journal Article
• Language: English
• Published: Penza State University Publishing House 01.02.2022
• Subjects: cermet; conductive plastic; resistive element; resistive material; technology; variable resistor
• ISSN: 2307-4205
• DOI: 10.21685/2307-4205-2021-4-11

Background. Non-wire resistors are one of the most popular types of radio components. Their number in modern radio equipment reaches more than one third (40 %) of the total number of all resistors. Consequently, the reliability of modern electronic devices largely depends on the quality of these resistors. Hence, the main requirements for their development remain the improvement of tactical, technical and operational characteristics. In addition, when developing non-wire resistors, it is necessary to take into account that in modern conditions radio-electronic equipment can be exposed to radioactive radiation, as well as work at high altitudes and in conditions of cosmic velocities. Therefore, at present, work in the field of increasing the resistance of resistors to mechanical and climatic influences is in demand. Matherials and methods. A promising direction in the field of improving variable resistors to achieve the best tactical, technical and operational parameters is the use of metal-ceramic films as a resistive element, since it becomes possible to create very miniature tuning potentiometers with infinite resolution. Results. The technical limitations of the wire manufacturing technology of resistive elements are formulated. The operational advantages of metal-ceramic resistive elements over wire ones are presented and theoretically substantiated. A comparative analysis of non-wire variable resistors based on metal-film elements, cermets and conductive plastics has been performed. The features of the manufacturing technology of potentiometers with a kermet resistive element are indicated. Recommendations are given on the further direction of work in the field of creating metal-ceramic variable resistors. Conclusions. The possibility of creating precision potentiometers with fundamentally new requirements for accuracy, reliability and quality is determined by the improvement of methods for controlling the process of applying ceramic-metal pastes and increasing the accuracy of maintaining the firing temperature in furnaces. The continuation of studies of the electrophysical properties of cermets will allow us to find new approaches to improving the reproducibility of parameters.