胶辊复合工艺对导电炭黑过电流保护元件的性能影响
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摘要
研究了胶辊复合工艺对以炭黑作为导电粒子的过电流保护元件的室温电阻、R-T特性、耐电压冲击等级的影响,结果表明:随着胶辊辊压力的增大,过电流保护元件的室温电阻先急速下降而后达到平稳,当复合辊压力超过芯层可耐受压力后,过电流保护元件的室温电阻上升。制备的过电流保护元件的R-T特性明显,当复合辊压力超过芯层可耐受压力后,过电流保护元件的PTC强度反而降低。随着胶辊复合压力的增大,过电流保护元件耐压等级提高,当复合辊压力超过芯层可耐受压力后,耐压等级出现降低。
The impacts of the room temperature resistance, R-T characteristic and voltage performance of over current protection component prepared by conductive carbon powder by lamination process with rubber rollers are investigated. Results show that with the increase of the pressure between rubber rollers, the room temperature resistance of the over current protective component decreases sharply at first and then reaches at a stable state, the R-T characteristics of over current protection component are obvious and the impact of voltage performance level increases. When the pressure between rubber rollers exceeds the tolerant pressure of the core layer, the room temperature resistance of the over current protective component increases, the PTC intensity of the over current protection component decreases and the impact of voltage performance level decreases.
The impacts of the room temperature resistance, R-T characteristic and voltage performance of over current protection component prepared by conductive carbon powder by lamination process with rubber rollers are investigated. Results show that with the increase of the pressure between rubber rollers, the room temperature resistance of the over current protective component decreases sharply at first and then reaches at a stable state, the R-T characteristics of over current protection component are obvious and the impact of voltage performance level increases. When the pressure between rubber rollers exceeds the tolerant pressure of the core layer, the room temperature resistance of the over current protective component increases, the PTC intensity of the over current protection component decreases and the impact of voltage performance level decreases.
引文
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[2] FOULGER S H.Electrical properties of composites in the vicinity of the percolation threshold[J].Journal of Applied Polymer Science,1999,72(12):1573-1582.
[3] 罗延龄.高分子基PTC 过电流保护元件及其应用[J].广州化工,2000(3):27-31.
[4] KAR P,KHATUA B B.PTC R characteristics of polycarbonate/nickel-coated graphite-based conducting polymeric composites in presence of poly(caprolactone)[J].Polymer Composites,2011,32(5):747-755.
[5] 谭洪生,王日辉,李丽.复合型高分子自限温发热材料及元器件在汽车冷启动方面的应用[J].塑料工业,2004,32(12):51-53.
[6] 罗延龄,薛丹敏,王庚超.乙炔炭黑在智能PTC自限温伴热带中的应用[J].炭素技术,1999(6):1-5.
[7] 赵子明.聚乙烯炭黑复合导电材料PTC强度的研究[D].厦门:厦门大学,2009.
[8] 杨铨铨,王军.陶瓷粉填充聚合物基过电流保护元件的电性能[J].仪表技术,2015(4):8-11.
[9] 王军,杨铨铨,刘正平.导电陶瓷粉制备的过电流保护元件的电性能[J].仪表技术,2013(9):13-16.