共查询到20条相似文献,搜索用时 343 毫秒
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通过研究特殊聚甲基氢硅氧烷、导热填料、补强填料、增黏剂4种材料对硅橡胶特性的影响,研制出一种干式变压器用高性能液态硅橡胶绝缘材料。结果表明:选择的4种材料对液态浇注材料的黏度、固化后绝缘材料的伸长率、导热性能、拉伸强度、剪切强度都有明显的提升效果。制成的高性能液态硅橡胶黏度小于160 000 mPa·s,固化后绝缘材料的伸长率大于200%,导热系数大于0.6 W/(m·K),拉伸强度大于3 MPa,剪切强度大于1 MPa。用此绝缘材料开发的高节能干式变压器已经成功地投入电网运行,运行情况良好。 相似文献
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以脂环族环氧树脂(2021P)、改性脂环族环氧树脂(PB3600)为基体树脂,并加入阳离子光引发剂、潜伏型热固化剂、填料等混合配制胶液,制备了用于摄像头模组粘接的UV/热双固化胶粘剂。通过调节不同配比,研究UV固化速率、热固化温度和时间的影响因素。结果表明:摄像头模组粘接胶的最佳配方为m(2021P)∶m(PB3600)∶m(Irgacure261)∶m(改性三氟化硼单乙胺)=100∶20∶4∶5,此时摄像头模组粘接胶粘剂具有高粘接强度、高储能模量、高T_g、低收缩率及优异的耐热性能等。 相似文献
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密封效果是直接影响VRLA蓄电池使用寿命的重要因素之一,而胶粘剂固化效果决定着电池的密封效果,因此,如何降低胶封过程中外界因素对胶粘剂固化效果的影响十分重要。通过大量的现场试验和分析,找出了VRLA蓄电池制造过程中操作、环境等因素对胶粘剂固化效果的影响规律及解决措施。 相似文献
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阀控式铅酸蓄电池用粘合剂及密封工艺的研究 总被引:1,自引:0,他引:1
选用不同的胺类树脂制成复合固化剂,根据阀控式铅酸蓄电池的不同结构和大小制备不同要求的粘合剂,并根据工艺环境及任务量确定密封工艺。这种粘合剂具有良好的耐腐性、耐候性(高温或低温)和粘接强度,并易于操作。 相似文献
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Imai T. Sawa F. Nakano T. Ozaki T. Shimizu T. Kozako M. Tanaka T. 《Dielectrics and Electrical Insulation, IEEE Transactions on》2006,13(2):319-326
This paper focuses on the electrical insulation properties of a newly prepared composite material by nano- and micro-filler mixture. Nano- and micro-filler mixture composites were made by dispersing nano-scale layered silicate fillers and micro-scale silica fillers in epoxy resin. To investigate the effects of nano- and micro-filler mixture, the thermal expansion coefficient and insulation breakdown properties by a needle-plate electrode method were measured for the filler mixture composite and the conventional filled epoxy. The filler mixture composite had almost the same thermal expansion coefficient as the conventional filled epoxy. In a continuous voltage rising test, the filler mixture composite had 7% higher insulation breakdown strength than the conventional filled epoxy. Moreover, under constant AC voltage (10 kV at 1 kHz), the filler mixture composite had an insulation breakdown time of more than 20,000 minutes whereas the conventional filled epoxy had a breakdown time of 830 minutes. Electron microscope observation showed that the area surrounded by dispersed micro-scale silica fillers were also filled with the nano-scale layered silicate fillers. Furthermore, the estimate of spacing between the fillers and the filler/epoxy interface area showed a more densely-packed structure of the filler mixture composite than the conventional filled epoxy. The morphological feature of the filler mixture composite seems to improve its insulation breakdown strength and time. 相似文献
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针对基体环氧树脂韧性差的特点,从环氧树脂增韧改性入手,研究了珠胶结构复合材料中基体组成与力学性能的关系。实验结果表明,在环氧树脂体系中添加液体CTBN橡胶,可以增加环氧树脂的韧性,提高环氧树脂对钢珠的粘附性。当CTBN添加量小于15%时,复合材料基材中环氧树脂为连续相,CTBN橡胶为分散相,复合材料的压缩和拉伸性能主要表现为刚性环氧树脂的性能。该配方范围内制备的增韧的珠胶复合材料在力学性能满足使用要求的前提下,珠胶粘附性有所提高,所获得的相关力学参数可用于珠胶结构件设计。 相似文献
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在优化填料分散方式的基础上,通过在四溴双酚A型环氧固化体系中添加不同类型的无机硅微粉填料制备覆铜板,对比其耐热性和界面性能.结果表明:球型硅微粉填料可以较好地改善与环氧树脂的相容性,提高覆铜板的耐热性. 相似文献