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Frequency dependent dielectric and impedance behavior of bismuth vanadate ceramics

机译:铋钒陶瓷频率相关的介质和阻抗行为

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In present work, Bismuth vanadate (BiVO4: BVO) ceramics is synthesized by the traditional solid-state reaction method sintered at temperature of 800 °C. The phase composition and crystal structure are confirmed by the X-ray diffraction (XRD) study. The microstructural analysis is performed by the field emission scanning electron microscopy (FE-SEM). It shows that, grains are highly dense with least porosity and clear grain boundaries. For the investigation of the dielectric properties, a wide range of frequency of 100 Hz - 1 MHz and 120 °C - 200 °C temperatures domain are selected. At lower frequency, real dielectric constant (ε') of BVO ceramics increases with increase in temperature. The maximum value of ε' for BVO ceramic is 427 at 120 °C. Also, the tangent loss (tan δ) increases with increase in temperature.
机译:在目前的工作中,通过在800℃的温度下烧结的传统固态反应方法合成钒酸盐(BIVO4:BVO)陶瓷。 通过X射线衍射(XRD)研究证实相组合物和晶体结构。 通过现场发射扫描电子显微镜(Fe-SEM)进行微观结构分析。 结果表明,晶粒具有最小孔隙度和透明晶界。 对于介电性能的研究,选择100Hz-1MHz和120℃-200℃温度域的宽范围。 在较低的频率下,BVO陶瓷的实际介电常数(ε')随温度的增加而增加。 BVO陶瓷的最大值为120°C。 而且,切线损失(TANδ)随温度的增加而增加。

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