IMprovement of sintering process of platinum layers in electrical furnaces
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2017-01-01
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Abstract
With the increased requirements for the price and quality of the components used in automotive industry and also the enhancing criteria for on time deliveries, which are related with keeping the stock of parts in warehouses very low, more and more manufacturing companies of these elements are forced to optimizing measures and fitting-up of high-tech equipment. As a rule, before such investments, very serious economic rationale, detailed risk assessment and long functional tests, followed by customer validations and finally approval must be done. Each of those steps guarantees the quality and the expedience of the project. The technology of production of electro-resistive temperature sensors for the automotive industry, based on thin film platinum layers, uses many thermal processes on different stages of their elaboration as a main method for stabilization of each next applied micro layer. To their running are demanded great and diverse requirements, which enforce a high level of the equipment and the technologies. The present work aims to the improvement of two of the sintering processes of platinum paste, applied directly to the ceramic base of the sensor element, using identical thermal regime. Their implementation is realized in terms of changing the existing older type of furnaces with new advanced version of these aggregates with perfected design of the operating chamber and improved control of the temperature in it. An evaluation of the thermal work of standard furnace for the production and also of the new advanced type is made. Both results are compared. It is analyzed the influence of the sintering process on the treated platinum layers and the ceramic substrate. All received data are confronted with their relevant ones at using the standard units and conditions. The obtained results allow the conclusion, that the replacement of the equipment is reasoned and it not only improves characteristics and product quality, but also reduces variations in the performance of the process. It was analyzed the influence of the sintering process on the platinum layers and the ceramic base. All the obtained data are compared with those corresponding to them using standard conditions and aggregates.