Journal
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Volume 27, Issue 2, Pages 512-520Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDEI.2020.008600
Keywords
epoxy resin; positive temperature coefficient; barium titanate based compound; resistivity-temperature characteristics; permittivity
Funding
- National Natural Science Foundation of China [51977186, 51907101]
- China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment [SKLD19Z02]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
- State Key Development Program of Basic Research of China (973 Program) [2014CB239501]
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In this work, positive temperature coefficient (PTC) material, as a functional filler to compensate the negative temperature coefficient of DC electrical resistivity of epoxy resin, is studied. As the temperature rises above the Curie temperature, the PTC material increases the DC electrical resistivity of epoxy composites when compared to neat epoxy. At 110 degrees C, the DC electrical resistivity of the epoxy composites is found to be 252.6% of the neat epoxy. Dielectric spectroscopy is used to analyze the mechanism of the PTC on epoxy composites. This paper shows that PTC material has the potential to regulate the DC electrical resistivity-temperature characteristic of polymeric insulating materials.
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