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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Effect of V2O5 on the sintering behavior, microstructure, and electrical properties of (Na0.5K0.5)NbO3 ceramics
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Effect of V2O5 on the sintering behavior, microstructure, and electrical properties of (Na0.5K0.5)NbO3 ceramics

机译：V2O5对（Na0.5K0.5）NbO3陶瓷的烧结行为，微观结构和电性能的影响

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摘要

Well-sintered (Na0.5K0.5)NbO3-x mol% V2O5 ceramics (abbreviated as NKN-V) with fine electrical properties were successfully prepared by conventional solid-state reaction through the careful control of processing conditions. The sintering behavior, phase structure, and electrical properties of the V2O5-doped NKN ceramics were investigated. Results show that when the V2O5 content is 0.6 mol%, the NKN ceramics attained the maximum density of 4.46 g/cm3 (about 98.9% of the theoretical density) at 1060degC, and therefore possessed enhanced electrical properties. But when the V2O5 content continued increasing, the density decreased. The secondary phase (Na2V6O16) could be detected by XRD analysis in all samples except x = 0 mol%. The Curie temperature of the NKN-based materials was found to decrease with the increase of V2O5. The dielectric properties of NKN ceramics doped with 0.6 and 0.9 mol% V2O5 were better than that of pure NKN ceramics. In addition, annealing treatment was proved to be an effective technique for improving dielectric properties and reducing the leakage current density.
机译：通过精心控制工艺条件，通过常规固相反应成功地制备了具有优良电性能的烧结良好的（Na0.5K0.5）NbO3-x mol％V2O5陶瓷（简称NKN-V）。研究了掺V2O5的NKN陶瓷的烧结行为，相结构和电性能。结果表明，当V2O5含量为0.6 mol％时，NKN陶瓷在1060℃时达到最大密度4.46 g / cm3（约为理论密度的98.9％），因此具有增强的电性能。但是当V2O5含量持续增加时，密度降低。除x = 0 mol％外，所有样品中的第二相（Na2V6O16）均可通过XRD分析检测。发现NKN基材料的居里温度随V2O5的增加而降低。掺杂0.6和0.9mol％的V 2 O 5的NKN陶瓷的介电性能优于纯NKN陶瓷。此外，事实证明，退火处理是改善介电性能并降低漏电流密度的有效技术。

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