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首页> 外文期刊>Optical and quantum electronics >Dielectric and piezoelectric properties of 0.970 (0.95(K_(0.485)Na_(0.515))NbO_3-0.05LiSbO_3)-0.015CuO-0.015AI_2O_3/ PVDF 0-3 composite reinforced with two kinds of ZnO powder
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Dielectric and piezoelectric properties of 0.970 (0.95(K_(0.485)Na_(0.515))NbO_3-0.05LiSbO_3)-0.015CuO-0.015AI_2O_3/ PVDF 0-3 composite reinforced with two kinds of ZnO powder

机译：两种ZnO粉末增强的0.970（0.95（K_（0.485）Na_（0.515））NbO_3-0.05LiSbO_3）-0.015CuO-0.015AI_2O_3 / PVDF 0-3复合材料的介电和压电性能

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摘要

0.970(0.95(K0.485Na0.515)NbO3-0.05LiSbO(3))-0.015CuO-0.015Al(2)O(3) (KNNLS-CA) ceramic powder obtained through the conventional solid state reaction. The ZnO nanoparticles (denoted as ZnO1) and poly (vinylidene fluoride) (PVDF) were supplied from commercial companies. The self-synthesized ZnO powder (denoted as ZnO2) were prepared by hydrothermal method using Zn (CH3COO)(2)center dot 2H(2)O and NaOH. Subsequently, the two kinds of composites were fabricated by hot-pressing process using KNNLS-CA ceramic powder, two kinds of ZnO powder and PVDF polymer. The effects of the ZnO on the crystalline structures, morphology, thermal stability, densities and electric properties of composites were studied systemically. The KNNLS-CA ceramic possesses a perovskite phase with orthorhombic symmetry and peaks from the second phase of K3Li2Nb5O15 (PDF#52-0157) are detected by X-ray diffraction. PVDF polymer mainly possesses alpha, beta and gamma phases. Two kinds of ZnO all possess hexagonal wurtzite structures without any impurity phase. It is worth noting that the ZnO particles have great impacts on lattice constants, strain and crystallinity. In addition, the ZnO particles can enhance the relative fraction of beta phase in PVDF and improve the thermal stability of the composite. Interestingly, the dielectric and piezoelectric properties are also found to be improved with the increase of ZnO content. Especially, when 10 wt.% ZnO2 is doped, the dielectric permittivity reaches the value of 586.4 (100 Hz) at room temperature and the piezoelectric constant is 64 pC/N. After 30 days of aging test, it is obvious that all the composites present a good stability of piezoelectric property.
机译：通过常规固态反应获得的0.970（0.95（K0.485Na0.515）NbO3-0.05LiSbO（3））-0.015CuO-0.015Al（2）O（3）（KNNLS-CA）陶瓷粉末。 ZnO纳米颗粒（表示为ZnO1）和聚偏二氟乙烯（PVDF）由商业公司提供。通过水热法使用Zn（CH3COO）（2）中心点2H（2）O和NaOH制备自合成的ZnO粉末（表示为ZnO2）。随后，采用KNNLS-CA陶瓷粉，两种ZnO粉和PVDF聚合物通过热压工艺制备了两种复合材料。系统研究了ZnO对复合材料晶体结构，形貌，热稳定性，密度和电性能的影响。 KNNLS-CA陶瓷具有正交晶对称的钙钛矿相，并且通过X射线衍射检测到来自K3Li2Nb5O15第二相的峰（PDF＃52-0157）。 PVDF聚合物主要具有α，β和γ相。两种ZnO都具有六方纤锌矿结构，没有任何杂质相。值得注意的是，ZnO颗粒对晶格常数，应变和结晶度有很大影响。此外，ZnO颗粒可以提高PVDF中β相的相对含量，并改善复合材料的热稳定性。有趣的是，还发现介电和压电性能随ZnO含量的增加而提高。特别地，当掺杂10wt。％的ZnO 2时，在室温下介电常数达到586.4（100Hz）的值，并且压电常数为64pC / N。经过30天的老化测试，很明显，所有复合材料均表现出良好的压电性能稳定性。

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