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<p>In order to meet the huge demand for millimetre-sized Li<sub>2</sub>TiO<sub>3</sub> ceramic pebbles for future fusion reactors, the aim of this work was to develop a combination of microfluidic and UV curing techniques to greatly improve the preparation efficiency. By employing a cross-junction microfluidic device, large-sized droplets were controllably generated and subsequently subjected to in-situ UV curing, enabling rapid solidification of resin-based ceramic slurries. Systematic investigations revealed critical processing parameters: (1) The rheological behavior of ceramic slurries was governed by solid content and dispersant concentration, directly influencing droplet stability during microfluidic manipulation. (2) UV curing efficacy depended on exposure time(10 ~ 40&#xa0;s), aging time (30 ~ 120&#xa0;s) and solid content, and the optimised conditions allow complete cross-linking of 2&#xa0;mm green pebbles. (3) Post-sintering at an ultra-low heating rate (0.5&#xa0;°C/min) produced Li<sub>2</sub>TiO<sub>3</sub> ceramic pebbles with a relatively dense microstructure and high crush load(42 N).This microfluidic and UV curing strategy demonstrates potential process controllability and scalability.</p>

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Preparation of Millimeter-Sized Li2TiO3 Ceramic Pebbles by Droplet Microfluidics and UV Curing

  • 期刊论文

  • 发表日期：

    2025年5月25日

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  • Xin Hu,
  • Guangfan Tan,
  • Liang Cai,
  • Biao Yi,
  • Dajun Xu,
  • Zeyu Gao,
  • Xiaoxu Dong,
  • Yusha Li,
  • Yingchun Zhang

摘要

In order to meet the huge demand for millimetre-sized Li2TiO3 ceramic pebbles for future fusion reactors, the aim of this work was to develop a combination of microfluidic and UV curing techniques to greatly improve the preparation efficiency. By employing a cross-junction microfluidic device, large-sized droplets were controllably generated and subsequently subjected to in-situ UV curing, enabling rapid solidification of resin-based ceramic slurries. Systematic investigations revealed critical processing parameters: (1) The rheological behavior of ceramic slurries was governed by solid content and dispersant concentration, directly influencing droplet stability during microfluidic manipulation. (2) UV curing efficacy depended on exposure time(10 ~ 40 s), aging time (30 ~ 120 s) and solid content, and the optimised conditions allow complete cross-linking of 2 mm green pebbles. (3) Post-sintering at an ultra-low heating rate (0.5 °C/min) produced Li2TiO3 ceramic pebbles with a relatively dense microstructure and high crush load(42 N).This microfluidic and UV curing strategy demonstrates potential process controllability and scalability.