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<p>To achieve more sustainable production of high-temperature superconductor ceramics in line with the United Nations Sustainable Development Goals, we propose the use of microwave-assisted heat treatment. Y<sub>3</sub>Ba<sub>5</sub>Cu<sub>8</sub>O<sub>18</sub> (Y358), a high-Tc ceramic with a superconducting transition above 100&#xa0;K, was selected as the target material, as microwave-assisted heat treatment has not previously been reported for this compound. The calcination process of the Y358 compound was carefully studied by thermogravimetric analysis (TG/DTA) to determine the optimal sintering temperature range. On this basis, conventionally sintered samples produced in an electric resistance furnace (ERF) were compared with microwave-sintered samples in a microwave oven modified for laboratory use (hereafter referred to as the microwave furnace, MWF). The microstructures of all samples were thoroughly examined using XRD and SEM/EDS. Owing to the shorter sintering time in microwave-assisted heat treatment, the samples exhibit smaller grain sizes than conventionally sintered samples. Combining the one-pot synthesis route developed previously with the microwave-assisted sintering process, an effective and environmental-friendly processing route can be established.</p> Graphical Abstract <p></p>

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Microwave-assisted heat treatment of Y3Ba5Cu8O18 phase: Toward sustainable processing of high-temperature superconductors

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月9日

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  • Alexander Lourenço Pessoa,
  • Rodolfo Izquierdo,
  • Alfonso Pulgar Arrieta,
  • Victor Ciro Solano Reynoso,
  • Francine Bettio Costa Zadorosny,
  • Michael Rudolf Koblischka,
  • Anjela Koblischka-Veneva,
  • Rafael Zadorosny

摘要

To achieve more sustainable production of high-temperature superconductor ceramics in line with the United Nations Sustainable Development Goals, we propose the use of microwave-assisted heat treatment. Y3Ba5Cu8O18 (Y358), a high-Tc ceramic with a superconducting transition above 100 K, was selected as the target material, as microwave-assisted heat treatment has not previously been reported for this compound. The calcination process of the Y358 compound was carefully studied by thermogravimetric analysis (TG/DTA) to determine the optimal sintering temperature range. On this basis, conventionally sintered samples produced in an electric resistance furnace (ERF) were compared with microwave-sintered samples in a microwave oven modified for laboratory use (hereafter referred to as the microwave furnace, MWF). The microstructures of all samples were thoroughly examined using XRD and SEM/EDS. Owing to the shorter sintering time in microwave-assisted heat treatment, the samples exhibit smaller grain sizes than conventionally sintered samples. Combining the one-pot synthesis route developed previously with the microwave-assisted sintering process, an effective and environmental-friendly processing route can be established.

Graphical Abstract