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不同压电陶瓷体积分数对1-3-2型压电复合材料性能的影响 总被引:1,自引:0,他引:1
以环氧树脂为基体,铌镁锆钛酸铅[0.375Pb(Mg1/3Nb2/3)O3·0.375PbTiO3·0.25PbZrO3,PMN]为压电功能体,采用切割-浇注法制备了1-3-2型压电复合材料.分析讨论压电陶瓷体积分数(φ,下同)对1-3-2型压电复合材料压电性能、介电性能及声阻抗的影响.结果表明:随着PMN的φ的增加,复合材料的压电应变常数(d33)和声阻抗(2)增大;相对介电常数(εr)几乎呈线性增加,且当PMN的φ为47.47%时,复合材料的εr=1 660,远小于纯PMN陶瓷的(εr=4000).压电电压常数(g33)及介电损耗(tan δ)则呈下降趋势;与PMN相比较,1-3-2型压电复合材料厚度方向的谐振明显增强,机械品质因数(Qm)显著降低;随着PMN的φ的增加,复合材料的平面机电耦合系数(Kp)减小,而厚度机电耦合系数(Kt)增加. 相似文献
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环境湿度对1-3型水泥基压电复合材料性能的影响 总被引:3,自引:1,他引:3
用切割-填充法,以硫铝酸盐水泥为基体,铌镁锆钛酸铅[Pb(Mg1/3Nb2/3)O3·PbTiO3·PbZrO3](PMN)为压电功能体制备了1-3型硫铝酸盐水泥基压电复合材料.研究了环境湿度对1-3型水泥基压电复合材料的压电性能和介电性能的影响.结果表明随着相对湿度的增大,压电电压常数g33与机械品质因数Qm 呈非线性减小.湿度对压电应变常数d33以及机电耦合系数Kp和Kt的影响较小.在低频和高频段,当相对湿度低于85%时,介电常数εr基本不受湿度的影响,表现出良好的介频稳定性. 相似文献
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压电陶瓷/硫铝酸盐水泥复合材料的压电性及介电性 总被引:4,自引:2,他引:4
采用水泥作为压电复合材料的基体,可有效解决机敏材料与混凝土母体结构材料之间的相容性问题。用压制法制备了铌锂锆钛酸铅[0.08Pb(Li1/4Nb3/4)O3·0.47PbTiO3·0.45PbZrO3,简称P(ZTNL)]/硫铝酸盐水泥复合材料,分析讨论了P(ZTNL)颗粒粒度和含量对水泥基压电复合材料的压电性和介电性的影响。结果表明:随着P(ZTNL)粒度的增大,复合材料的压电性和介电性均随之增大,但机电耦合系数则减小,当达到一定值后,机电耦合系数趋于稳定。综合分析表明,在所研究的材料中P(ZTNL)粒度应为100μm左右为宜。随着P(ZTNL)含量的增加,压电复合材料的压电常数和介电常数均增大,而介电损耗则减小,只有当P(ZTNL)质量分数超过70%时,水泥基压电复合材料才显示出较好的压电性能。P(ZTNL)的质量分数为85%时,压电复合材料的平面机电耦合系数KP和厚度伸缩机电偶合系数Kt分别为28.54%和28.19%。在-30~100℃范围内,水泥基压电复合材料的介电常数几乎不变,表现出优良的介电稳定性。 相似文献
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以NBR为基体材料,以压电陶瓷为功能相制备压电橡胶复合材料,并对其压电与吸声性能进行研究.结果表明,复合材料的压电常数(d33)随压电陶瓷用量的增大而增大,当压电陶瓷用量为5210份时,d33达到3.1×10-11C·N-1,并随着极化时间的延长而增大,随着极化温度的升高先增大后减小,且最佳极化时间为25min,最佳极化温度为80℃.压电橡胶复合材料的吸声因数在2~3 kHz的频率内随着复合材料压电常数的增大而增大,碳纤维的加入使复合材料内部形成了一定的导电网络,提高了复合材料的吸声因数. 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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0-3型水泥基压电机敏复合材料的制备和性能 总被引:8,自引:5,他引:8
智能结构体系正逐渐被引入土木工程领域,它对于解决土木工程结构的安全性、耐久性、灵活性以及自适应性课题提供了更强的支持,在智能结构中较为突出的问题是机敏材料与母体结构材料的相容性,由于土木工程中主要结构材料--混凝土的特性,在其它智能结构中具有良好相容性的机敏材料,在混凝土智能结构中有可能存在相容性问题,针对这 一情况,提出以水泥基材料作为压电机敏复合材料的基体,期望解决机敏材料与混凝土结构材料之间的相容性问题,研究结果显示:0-3型水泥基压电机敏复合材料在制备上是可行的,而形成的0-3型水泥基压电机敏复合材料内部结构均匀,压电性能优于同条件下聚合物基压电复合材料的性能,而极化电压却大大降低,在性能上满足了作为机敏材料在智能结构中的使用条件。 相似文献
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以热塑性聚氨酯弹性体为基材,压电陶瓷粉和导电石墨为功能相,制备了压电陶瓷/聚氨酯智能阻尼复合材料,并对其结构性能进行表征分析。结果表明,压电陶瓷粉添加质量份为20和40时,能得到具有较好分散性的压电陶瓷/聚氨酯智能阻尼复合材料;当压电陶瓷粉添加质量份为40时,tgδ峰值达到最大,说明制得的复合材料具有良好的阻尼性能;相对介电常数随着压电陶瓷粉添加量的增加而增加,当压电陶瓷粉质量份为40时,相对介电常数为15.06。热性能测定结果表明,加入压电陶瓷粉后,复合材料的软化点明显提高。 相似文献
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Huang Shifeng Ye Zhengmao Xu Dongyu Chang Jun Wang Shoude Cheng Xin 《Ferroelectrics Letters Section》2007,34(1):22-28
Composites with 2-2 connectivity were fabricated from lead magnesium niobate-lead zirconate-lead titanate(PMN) and sulphoaluminate cement by cut-filling process. The influences of PMN volume fraction and water/cement ratio on the properties of the composite were investigated. The results show that the piezoelectric strain constant d33 increase rapidly with increasing volume fraction of PMN. When the PMN volume fraction is about 0.60, the d33 value is up to 357 pCN-1. The planar electromechanical coupling coefficient Kp of the composites is lower than that of PMN ceramic, while the thickness electromechanical coupling coefficient Kt is higher than that of PMN ceramic. The water/cement ratio has little influence on piezoelectric properties of 2-2 cement based piezoelectric composite. 相似文献
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Phakin Chomyen Rumporn Potong Rattiyakorn Rianyoi Athipong Ngamjarurojana Prinya Chindaprasirt Arnon Chaipanich 《Ceramics International》2018,44(1):76-82
Piezoelectric ceramic – Portland cement composites have been developed for sensor application in concrete structures to overcome the acoustic matching problem that may occur for piezoelectric ceramic or polymers with concrete. Pozzolanic materials such as fly ash are commonly used in concrete to enhance durability. The objectives of this research were to investigate the effects of fly ash addition on the physical properties, dielectric properties and piezoelectric properties of 0–3 barium zirconate titanate ceramic– Portland cement composites. The results showed that the dielectric constant of these composites decreased when the fly ash content in the composite increases. However, the piezoelectric coefficient (d33) value of BZT–PC composite with fly ash 10% by volume was found to be similar to that of BZT–PC composites. 相似文献
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采用热压法分别制备了PZT/PVDF,PT/PVDF O-3型压电复合材料,所得材料具有较高的压电常数和良好的可柔性加工性能。并分析了无机压电陶瓷种类、含量对复合材料介电性能和压电性能的影响。 相似文献
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制备了高性能的PLZT系列压电陶瓷,测量了其压电性能,探讨了掺杂、工艺制度对材料性能的影响,观察了材料的形貌及断口情况。 相似文献
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采用固相法应法制备了(1–x)(K0.48Na0.48Li0.04)NbO3–x(Na0.8K0.2)0.5Bi0.5TiO3无铅压电陶瓷,研究了不同x(0,0.5%,1.0%,1.5%,2.0%,3.0%)对材料的相结构、介电性能以及压电性能的影响。结果表明:随着x增加,样品的Curie温度TC与正交到四方相变温度TO–T均逐渐降低,而压电常数d33与机电耦合系数kp均先升高后降低;该体系在0.5% 相似文献
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Ceramic/polymer composites are attracting increasing interest in materials research and practical applications due to the combination of excellent electric properties of piezoelectric ceramics and good flexibility of polymer matrices. In this case, the crystallization of the polymer has a significant effect on the electric properties of ceramic/polymer composites. Based on different heat treatment methods, the crystallization of poly(vinylidene fluoride) (PVDF) in composites of lead zirconate titanate (PZT) and PVDF can be controlled effectively. PZT/PVDF composites with various PVDF crystallizations exhibit distinctive dielectric and piezoelectric properties. When the crystallization of PVDF is 21%, the PZT/PVDF composites show a high dielectric constant (ε) of 165 and a low dielectric loss (tan δ) of 0.03 at 103 Hz, and when the crystallization of PVDF reaches 34%, the piezoelectric coefficient (d33) of PZT/PVDF composites can be up to ca 100 pC N?1. By controlling the crystallization of PVDF, PZT/PVDF composites with excellent dielectric and piezoelectric properties were obtained, which can be employed as promising candidates in high‐efficiency capacitors and as novel piezoelectric materials. Copyright © 2010 Society of Chemical Industry 相似文献
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Wenchao Huang 《Polymer-Plastics Technology and Engineering》2013,52(15):1590-1593
A kind of new composite material composed of piezoelectric ceramic lead magnesium niobate-lead zirconate-lead titanate (PMN)/carbon nanofibers (CNFs)/epoxy resin (EP) were prepared by a resin casting method. The effects of carbon nanofibers on dielectric properties of PMN/CNFs/EP composites were investigated in this paper. The concetration of CNFs had significant effects on dielectric constant, dielectric loss, dielectric frequency dependence and dielectric temperature dependence of PMN/CNFs/EP composites. When the content of CNFs increased from 0 to 0.8 wt% of the epoxy resin, the dielectric constant at 1 kHz increased sharply from 13.6 to 158, and the dielectric loss increased from 0.0524 to 2.59. In plots of the dielectric constant against frequency and dielectric loss against frequency, the dielectric constant and dielectric loss reduced dramatically at lower frequency ranging from zero to about 105 Hz, then approach to be stable at frequency higher than 105 Hz. Moreover, as to the effects of temperature on dielectric constant and dielectric loss of PMN/CNFs/EP composites, the dielectric constant of composite increased ranging from 25°C to 160°C, and the dielectric loss of composite also showed increase besides that with CNFs content 0.8 wt%. 相似文献