IDEA #8L29OA THICK-FILM NTC THERMISTOR MATERIALS

Fig. 1. View of planar-type thick-film thermistors and bulk analogue (for comparison) State of Development We look for further application possibilities of the developed thick-film materials. Cooperation for further research is also appropriate. Contact Details: Lviv Regional Department of Academy of the Technological Sciences of Ukraine Contact person: Dr. N. Vakiv 202, Stryjska st., Lviv, 79031, Ukraine Tel: 38 0322 631065; Fax: 38 0322 94 9735 E-mail: vakiv@ipm.lviv.ua THICK-FILM NTC THERMISTOR MATERIALS Description Mixed transition-metal manganite ceramics of NiMn2O4-CuMn2O4-MnCo2O4 system are widely used as functional materials for thick-film pastes. An essential problem is to retain a high level of temperature sensitivity for the prepared thick-film thermistors. This problem is resolved mainly by proper pastes formation and correctly arranged sintering route. At the present, the prepared thick-film NTC (negative temperature coefficient) thermistors possessing the following characteristics: - nominal sheet resistivity 1,000 k./□, - temperature sensitivity 3500 K can be fabricated via conventional screen-printing technological route. The further research aimed on development of thick-film materials with lower values of nominal sheet resistance is foreseen in the future. Innovative Aspect and Main Advantages The developed functional thick-film materials – spinel- type thermistor ceramics composits – are patented in Ukraine. According to the environmental policy of the European Union, the lead-free thick films are proposed. In comparison to discrete analogues (Fig. 1), these thick- film thermistors are distinguished by: - design flexibility - preparation miniaturization and - construction cost effectiveness. Areas of Application - Temperature Compensation - Temperature Measurement & Control -