| Autor: |
Minakova, N. N., Panin, Victor E, Fomin, Vasily M |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2310 Issue 1, p1-4, 4p |
| Abstrakt: |
This paper analyzes the possibility to control properties of carbon black filled rubbers suitable for the production of positive temperature coefficient thermistors through properties and characteristics of an electrically conductive constituent. The following functional properties of positive temperature coefficient thermistors are considered: temperature coefficient of resistance, the spread of volume electrical resistance values during cooling after heating in relation to initial values of resistance (variation factor). Experiments prove that the electrically conductive constituent influences the considered properties. It is shown that it is possible to select the specific filler modification which provides the consistent pattern required for positive temperature coefficient thermistors: an increase of temperature coefficient of resistance, a decrease of variation factor. The carbon black surface modification compliant to physical principles of self-regulating ability is proposed according to the results of the conducted research. Interaction of carbon black particles with each other should be weaker than the interaction of carbon black particles with particles of rubber. Obtained results reveal that performed modifications of a carbon black surface can enable the properties of positive temperature coefficient thermistors when the range of volume electrical resistance becomes wider. It is concluded that modifications of a carbon black surface can be evaluated using the ratio of nonlinearity of the current-voltage characteristics of material. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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