Scholarlink

<p>Iron oxide is one of the most promising materials for energy storage due to its elevated dielectric constant. However, its significant dielectric loss and structural instability limit its efficiency in practical applications. This study explores the effect of gadolinium (Gd) substitution on the structural and dielectric properties of iron oxide. Gd<sub>x</sub>Fe<sub>2−x</sub>O<sub>3</sub> nanoparticles were synthesized via a sol–gel method followed by supercritical drying. X-ray diffraction confirmed the transformation from a rhombohedral α-phase in pure iron oxide to a stabilized cubic maghemite phase upon Gd incorporation, with no secondary phases detected. Dielectric measurements across varying frequencies and temperatures revealed that Gd doping significantly reduces both the dielectric constant and dielectric loss, making these materials more suitable for high-frequency energy storage applications. Scanning electron microscopy analysis indicated that Gd substitution led to a decrease in grain size and an increase in surface roughness, thereby improving the overall material properties. These findings highlight the potential of Gd-doped maghemite as a versatile material for next-generation electronic and energy storage devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Tailoring Gd substitution in iron oxide (GdxFe2−xO3, x = 0–0.1) via the sol–gel method for enhanced structural stability and reduced dielectric loss in energy storage applications

  • 期刊论文

  • 发表日期：

    2025年8月19日

查看全文
  • Mokhtar Hjiri,
  • Sonia Soltani,
  • Anouar Jbeli,
  • Nouf Ahmed Althumairi,
  • Abdullah M. Aldukhayel,
  • Majdi Benamara,
  • Nazir Mustapha,
  • Manuel Almeida Valente

摘要

Iron oxide is one of the most promising materials for energy storage due to its elevated dielectric constant. However, its significant dielectric loss and structural instability limit its efficiency in practical applications. This study explores the effect of gadolinium (Gd) substitution on the structural and dielectric properties of iron oxide. GdxFe2−xO3 nanoparticles were synthesized via a sol–gel method followed by supercritical drying. X-ray diffraction confirmed the transformation from a rhombohedral α-phase in pure iron oxide to a stabilized cubic maghemite phase upon Gd incorporation, with no secondary phases detected. Dielectric measurements across varying frequencies and temperatures revealed that Gd doping significantly reduces both the dielectric constant and dielectric loss, making these materials more suitable for high-frequency energy storage applications. Scanning electron microscopy analysis indicated that Gd substitution led to a decrease in grain size and an increase in surface roughness, thereby improving the overall material properties. These findings highlight the potential of Gd-doped maghemite as a versatile material for next-generation electronic and energy storage devices.