| 外加电压对沥青碳纤维/ABS树脂复合材料导电性的影响 |
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| 引用本文： | 梁晓怿,凌立成,吕春祥,刘朗.外加电压对沥青碳纤维/ABS树脂复合材料导电性的影响[J].复合材料学报,2001,18(2):14-17. |
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| 作者姓名： | 梁晓怿 凌立成 吕春祥 刘朗 |
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| 作者单位： | 1. 中国科学院山西煤炭化学研究所,
2. 中国科学院山西煤炭化学研究所 |
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| 基金项目： | 中国科学院重点基金资助项目!12 2 2 14 |
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| 摘 要： | 通用级沥青碳纤维与ABS树脂通过单螺杆挤出机共混后模压成型, 所制复合材料的电阻率随材料中纤维添加量的增多而迅速降低。当复合材料中纤维添加量较少时,材料的电流电压关系不满足欧姆定律所描述的线性关系,材料电阻随外电压的增大而减小。随着纤维含量的增加,材料电流电压关系的线性度逐渐增大。当纤维含量达到40 wt%时,材料电阻不随外电压的增大而变化,材料满足欧姆定律。经外加高电压处理后,材料电阻率发生永久性降低,其电流电压关系的线性度提高。隧道跃迁理论能够较好地解释上述现象。
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| 关 键 词： | 碳纤维 ABS树脂 复合材料 导电性 电压 |
| 文章编号： | 1000-3851(2001)02-0014-04 |
| 收稿时间： | 1999-09-25 |
| 修稿时间： | 1999年9月25日 |
INFLUENCE OF EXTERNAL VOLTAGE ON THE CONDUCTIVITY OF COMPOSITES COMPOSED OF CARBON FIBERS AND ABS RESIN |
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| LIANG Xiaoyi,LING Licheng,LU Chunxiang,LIU Lang.INFLUENCE OF EXTERNAL VOLTAGE ON THE CONDUCTIVITY OF COMPOSITES COMPOSED OF CARBON FIBERS AND ABS RESIN[J].Acta Materiae Compositae Sinica,2001,18(2):14-17. |
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| Authors: | LIANG Xiaoyi LING Licheng LU Chunxiang LIU Lang |
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| Affiliation: | 1. Institute of Coal Chemistry, Chinese Academy of Sciences, P.O.Box 165, 030001, Taiyuan, Shanxi, China;
2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P.O.Box 165, 030001, Taiyuan, Shanxi, China |
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| Abstract: | Conductive ABS resin composites filled with general pitch based carbon fibers were fabricated by hot press moulding after raw materials were preblended through a single screw extruder. The composite resistivity decreases with fibers content going up. And the electrical current displays non linear dependence on the external voltage acted on composites and the resistance of composites varies down with the raise of voltage, which implies that the composites don't meet Ohm's Law. When fibers fraction increases, the linearity between current and voltage goes up correspondingly. For the sample containing fillers of 40 wt%, its resistance remains constant and it satisfies Ohm's Law very well. It is interesting that the high voltage can result in the permanent reduction of composite resistance. And the voltage, which makes the permanent reduction of composites resistance, goes up with the increase of fillers loading. Moreover, the linearity of current and voltage rises after composites were treated by high voltage. All these phenomena can be explained by quantum tunneling model the results of this paper provide a new method for improving the conductivity and stability to varied voltage of composites. |
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| Keywords: | carbon fibers ABS resin composite conductivity voltage |
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