Abstract In this work, ErNbO4 samples were prepared using the sol-gel method, through the citrate route, and heat-treated at temperatures between 700 and 1600 °C. The structure was studied by X-ray diffraction and Raman spectroscopy. The crystallite size was estimated using the Rietveld refinement and the Sherrer's formula, presenting values from 31.27 to 86.65 nm and from 40.96 to 78.23 nm, respectively. The morphology was studied by scanning electron microscopy. The measurement of the complex permittivity was made using the small perturbation technique, with a cavity operating in TE105 mode, at resonant frequency of 2.7 GHz. The increase of the treatment temperature promoted the increase of the dielectric constant and the dielectric losses were still maintained with low values, allowing their potential application in electric storage devices. The dielectric constant of ErNbO4 in a zero porosity sample case was estimated and compared with the experimental values.

中文翻译：

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溶胶-凝胶法制备的 ErNbO4 的结构、形态和介电性能

摘要 在这项工作中，采用溶胶-凝胶法，通过柠檬酸盐途径制备 ErNbO4 样品，并在 700 至 1600 °C 的温度下进行热处理。通过X射线衍射和拉曼光谱研究了结构。使用 Rietveld 细化和 Sherrer 公式估计微晶尺寸，分别呈现 31.27 至 86.65 nm 和 40.96 至 78.23 nm 的值。通过扫描电子显微镜研究形态。复介电常数的测量是使用小扰动技术进行的，腔在 TE105 模式下工作，谐振频率为 2.7 GHz。处理温度的升高促进了介电常数的增加，介电损耗仍然保持在较低的值，使其在蓄电装置中具有潜在的应用价值。