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arXiv 1909.13620cond-mat.mtrl-sci
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BaO Na2O Nb2O5 WO3 P2O5微晶玻璃的结构、电学和储能性能

Structural, electrical and energy storage properties of BaO Na2O Nb2O5 WO3 P2O5 glass ceramics system

Abderrahim Ihyadn, Abdelilah Lahmar, Daoud Mezzane, Lahcen Bih, Abdelhadi Alimoussa, M'Barek Amjoud, Mimoun El Marssi, Igor A Lukyanchuk

摘要:

铁电微晶玻璃具有高介电常数和高耐压强度的双重性能,是一种很有前途的复合材料。在此基础上,采用控制晶化技术制备了2BaO-0.5Na2O2.5 [(1-x)Nb 2 O 5xWO 3]-1P2O5(x=0,0.1,0.2,0.3,0.4)新型磷酸盐微晶玻璃,分别命名为B 0,B1,B2,B3,B4。采用差示扫描量热法(DSC)、X射线粉末衍射(XRD)、拉曼光谱、交流阻抗谱和P-E磁滞回线等对所制备的微晶玻璃进行了研究。所有这些技术允许识别的Ba 2Na 4 W2 Nb 8 O30相与钨青铜结构嵌入在玻璃基质中。玻璃陶瓷的密度随着钨含量的增加而增加,在x =0.3时达到最大值,然后下降。介电和电导率参数被发现是由氧空位的存在下。利用玻璃陶瓷的P-E磁滞回线,研究了玻璃陶瓷的室温储能性能。最佳放电密度为B3,能量效率为73.77%。

英文摘要:

Ferroelectric glass-ceramics are promising composite materials with dual properties, of high dielectric permittivity and high dielectric breakdown strength. In this context, new phosphate glass-ceramics 2BaO-0.5Na2O 2.5[(1-x)Nb2O5 xWO3]-1P2O5 (x=0, 0.1, 0.2, 0.3 and 0.4) designated as B0, B1, B2, B3, B4 respectively, were prepared by the controlled crystallization technology and then crystallized at high temperature of 760 °C for 10 hours. Subsequently, the obtained glass-ceramics were studied by Differential Scanning Calorimetry (DSC), X-ray powder diffraction (XRD), Raman, impedance spectroscopy, and the P-E hysteresis loops. All of these techniques allowed the identification of Ba2Na4W2Nb8O30 phase with tungsten bronze structure embedded in the glassy matrix. The density of glass-ceramics was found to increase with increasing tungsten content to reach a maximum at x =0.3 and then decreases. Dielectric and conductivity parameters were found to be governed by the presence of oxygen vacancies. Room temperature energy storage property which depends on the composition X, was performed using P-E hysteresis loops of the glass-ceramics. The optimum discharge density was obtained for B3 with an energy efficiency of 73.77%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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