Material Sciences Thick-film NTC thermistor materials
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 kOm/m2,
- 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
Fig. 1 View of planar-type thick-film thermistors
and bulk analogue (for comparison)
Stage 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:
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