1999 Fiscal Year Final Research Report Summary
Self-temperature-control plane heaters by polyethylene glycol-graphite systems
| Project/Area Number |
10650305
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Nagoya University |
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Principal Investigator |
KIMURA Toyoaki Nagoya University, Engineering,Molecular Design, Research Associate, 工学研究科, 助手 (70106631)
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| Project Period (FY) |
1998 – 1999
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| Keywords | polyethylene glycol / graphite / PTC-heater / switching element / Ketjenblack / self-temperature control / electron transfer / plane heater |
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| Research Abstract |
In the first year the apparatus, "Multi channel logging" was set up and the additional soft-wears were prepares. On the other hand, an interaction between polyethylene glycol and carbon other than graphite was studied. For that purpose Ketjenblack EC, which is a typical carbon black, was dispersed in polyethylene glycol and the effect of temperature on electrical resistance of polyethylene glycol-ketjenblack system was investigated. It was found that electrical resistance did not increase with increasing temperature, namely no switching was observed in this system. In order to investigate the mechanism of the disappearance of the switching the effect of elongation on the electrical resistance of polyethylene glycol-Ketjenblack system was investigated. The results lead to a conclusion that the disappearance of switching could be due to continuous chains of carbon particles between two electrodes.
In the last year the effect of additives on the switching of polyethylene glycol-graphite systems was investigated. In addition to that many data were obtained from the complex-impedance measurement of polyethylene glycol-graphite systems. Based on these data the investigation is now processed. Since polyethylene glycol-graphite system unique it will take considerable time to clear the mechanism of switching as well as that of electric conduction through polyethylene glycol-graphite junctions. It is necessary to apply a theoretical model and simulating processes.
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