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研究了碳纳米管-碳纤维水泥基材料(CNT-CF/水泥基材料)导电性能,并分析了CNT-CF/水泥基材料导电机制.研究了导电填料含量、水灰比、龄期、湿含量等因素对复合材料导电性能的影响.结果 表明:CNT-CF/水泥基材料导电性能良好,电阻率数量级控制在102 Ω·cm以下.最优导电组合配比为碳纤维掺量0.4wt%,碳纳米管掺量0.5wt%.CNT-CF/水泥基材料电阻率随碳纳米管掺量由0.1wt%增加到0.5wt%而减小,由0.5wt%增加到2.0wt%而增大.试样水灰比的提高在一定程度上能降低CNT-CF/水泥基材料电阻率.CNT-CF/水泥基材料电阻率在龄期0~7d减小趋势,在7~28 d有增大趋势.CNT-CF/水泥基材料湿含量越大,其电阻变化率越大,且二者具有良好的线性关系. 相似文献
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以微米TiN和α-Al2O3粉体为原料,采用无水乙醇为溶剂湿法球磨制备了TiN-Al2O3复合粉体,在氮气气氛中通过无压烧结得到TiN-Al2O3复合材料。研究了TiN含量对TiN-Al2O3复合材料导电性能的影响,实验结果表明:TiN-Al2O3复合材料的导电性能符合渗流理论,材料的电阻率取决于导电添加剂TiN的含量,TiN含量的增加能明显降低Al2O3复合材料的电阻率,在实验粒度配比下,其渗流阀值Vc为20.30%~22.13%。 相似文献
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碳纳米管导电涂料的导电机理及影响因素 总被引:1,自引:0,他引:1
碳纳米管是一种纳米级无缝管状结构碳材料,具有优异的机械性能及独特的电学性能。它作为填料,加入到涂料中能极大地改善涂料的力学性能和电学性能。分析了碳纳米管导电涂料的导电机理、影响因素以及研究趋势。 相似文献
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以不饱和聚酯树脂为基材,通过合成不同结构的树脂和发迹导电填料(石墨)的填充量,研究了导电塑料的导电性能与导电填料含量,导电材料的关系,以及该导电塑料的电致发热热能与冲击韧性性能等。研究结果得到了标准的LPTC曲线,制得了具有商业用途和限温性UP复合导电塑料。 相似文献
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炭黑填充HDPE复合导电塑料研究 总被引:5,自引:0,他引:5
李志学 《现代塑料加工应用》1992,(3):29-32
探讨的是采用不同结构的炭黑及含量对高密度聚乙烯树脂的电性能、物理机械性能、加工性能及其结晶度的影响。实验研究和理论分析表明:炭黑的加入使材料的导电性能大大增加。 相似文献
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本文介绍了国内外水泥基复合材料的研究进展,重点对水泥基导电复合材料、水泥基电磁屏蔽复合材料和水泥基压电机敏复合材料,如导电性能、磁性能、屏蔽性能、压电性能等材料的组成、特性及发展状况进行了综述. 相似文献
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PE/CB/EPDM导电复合材料的研究 总被引:1,自引:0,他引:1
通过研究不同种类炭黑及基体树脂等对于导电复合材料电性能和力学性能的影响,确立了以HDPE为基材,导电炭黑为填料的导电复合体系。实验结果表明:当EPDM加入量为10-15份时,HDPE/CB/EPDM复合材料具有较好的综合性能。 相似文献
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Carbothermal synthesis of approximately spherical Si3N4 particles with homogeneous size distribution
Si3N4 particles with approximately spherical appearance, good dispersity, and homogeneous particle size distribution were successfully fabricated by a modified carbothermal method with the use of high-pressure N2 and composite additives CaF2 and Y2O3. The effects of parameters such as N2 gas pressure, additive, and temperature on the carbothermal reduction-nitridation (CRN) process were examined in detail. Based on extensive investigations, the mechanism of formation of Si3N4 particles was revealed. It was found that the process of nucleation and growth of Si3N4via the vapour-liquid-solid (V-L-S) mechanism under sufficient liquid encapsulation was essential for synthesising uniform particles with approximately spherical morphology and good dispersity. Because of the favourable morphology, the as-prepared Si3N4 particles exhibited great potential as thermally conductive fillers for next generation thermal interface materials. 相似文献
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用油酸钠/乙醇溶液、邻二氯苯、N-甲基吡咯烷酮对膨胀石墨进行表面处理和分散改性并制备了纳米石墨微片(GNP),研究了其效果,确定了油酸钠/乙醇溶液作为分散介质和表面改性剂。将由该处理剂制得的GNP以不同添加量添加到聚丙烯/聚烯烃弹性体共混树脂(PP/POE)中,制得PP/POE/GNP复合材料。测试表明,GNP在基体中分散均匀,大部分达到纳米尺寸,与基体结合良好,复合材料的室温渗滤阈值为9%左右(对应GNP质量份数为10份),GNP质量份数超过10份之后复合材料成为半导体,最低体积电阻率为3.6×107Ω.cm。当GNP质量份数为20份时,复合材料仍然保持较佳力学性能,材料破坏方式为脆性断裂。 相似文献
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Harry L. Frisch Junqing Ma Huihong Song Kurt C. Frisch Paul C. Mengnjoh Abul H. Molla 《应用聚合物科学杂志》2001,80(6):893-897
Electrically conductive polyaniline/polyurethane foams were prepared. The DC conductivity of the composite prepared at pH = 0.505 is about 0.9 S/cm. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 893–897, 2001 相似文献
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《Ceramics International》2022,48(11):15348-15354
Different sandwich structures of flexible transparent conductive thin film (TCFs) composed of Nb2O5 layers and Ag nanowires (AgNWs) have been prepared onto flexible polyethylene terephthalate (PET) substrate at room temperature to develop an indium-free TCF. The AgNWs are synthesized by a modified polyol method and inserted into the Nb2O5 layers that are prepared by radio frequency magnetron sputtering. The optical and electrical properties can be modified by changing the number of spin-coating cycle of AgNW suspension. At optimized condition, we achieve a flexible Nb2O5/AgNWs/Nb2O5 sandwich thin film with a low sheet resistance of 9.61 Ω/square and a high optical transmittance of 84.3%. Meanwhile, the resistance remains nearly constant after 30 tape tests, suggesting a strong adhesion to the PET substrate. The sandwich thin films show high long-term stability to oxidation, humid heat, and chemicals compared with that of AgNW networks, which can be attributed to the effective covering of Nb2O5 layer on the AgNWs. In addition, the Nb2O5/AgNWs/Nb2O5 sandwich thin films show good stability after repeated bending. This Nb2O5/AgNWs/Nb2O5 sandwich thin film can therefore serve as a high-performance transparent conductive electrode for numerous flexible electronic devices. 相似文献