A Thick Film Capacitive Temperature Sensor Using Barium StrontiumTitanate Glass Formulations

[摘要] This paper describes a novel use of thick film techniques to produce a temperature sensor. Ferroelectric materialsabove their Curie temperature exhibit a dielectric constant which is inversely dependent upon temperature. Themeasuring range of the sensor can be altered by varying the ratio of the ferroelectric components used (BaTiO3andSrTiO3). By using this ceramic together with a glass frit to form a paste, it is possible to employ standard thick filmtechniques to produce the sensors. Sensors with a composition (Ba0.5Sr0.5)TiO3were subjected to various temperatureand ambient conditions to investigate their temperature performance and stability. The sensors were fundamentallystable and exhibited a capacitance change as large as 65% of their initial value over a temperature rangeof 100℃ and yet the dependence was linear to within 1.5℃.

[学科分类] 工程和技术（综合）