Tailoring Crucible Surfaces for Suppressing Volatile Element Loss

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-07-14 DOI:10.1021/acsmaterialslett.5c00633

Yihang Yang, Luyao Wang*, Yingjie He, Ruixin Hao, Hongsheng Shi, Xinshui Zhang, Jiameng Yu, Chang Zhang, Yining Zhang, Ran Wei, Tianyi Gao, Yi Yu and Wei Liu*,

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Abstract

For ceramic solid electrolytes with volatile elements (lithium, sodium, etc.), it is difficult to precisely control the composition after sintering, leading to low ionic conductivity. Herein, we design a special crucible that can suppress Li loss for sintering high-quality Ta-doped Li₇La₃Zr₂O₁₂ (LLZTO) ceramics without using mother powder. The photopolymerization three-dimensional (3D) printed Al₂O₃ crucible, offering manufacturing flexibility in size and shape, undergoes gas–solid reactive sintering to form a dense LiAlO₂ layer on its surface that suppresses lithium loss by preventing lithium from reacting with the crucible. Interestingly, the LiAlO₂ layer indicates a large average grain size of 30.2 μm and ⟨111⟩ crystallographic orientation. The LLZTO ceramics sintered in this Al₂O₃@LiAlO₂ crucible exhibit higher ionic conductivity than those sintered in a traditional Al₂O₃ crucible. Furthermore, the Al₂O₃@LiAlO₂ crucible is reusable, significantly reducing the preparation costs. This method can be extended to the preparation of other materials prone to element loss at high temperatures.

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裁剪坩埚表面以抑制挥发性元素损失

对于含有挥发性元素（锂、钠等）的陶瓷固体电解质，烧结后难以精确控制成分，导致离子电导率低。在此，我们设计了一种特殊的抑制Li损失的坩埚，用于烧结高质量的掺ta Li7La3Zr2O12 （LLZTO）陶瓷，而不使用母粉。光聚合三维（3D）打印Al2O3坩埚提供了尺寸和形状上的制造灵活性，通过气固反应烧结在其表面形成致密的LiAlO2层，通过防止锂与坩埚反应来抑制锂的损失。有趣的是，LiAlO2层显示出30.2 μm的大平均晶粒尺寸和⟨111⟩的晶体取向。在Al2O3@LiAlO2坩埚中烧结的LLZTO陶瓷比在传统Al2O3坩埚中烧结的LLZTO陶瓷表现出更高的离子电导率。此外，Al2O3@LiAlO2坩埚是可重复使用的，大大降低了制备成本。该方法可推广到在高温下易发生元素损失的其它材料的制备。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.