Effects of Y Doping on Phase Structure, Microstructure and Electrical Conductivity of La10−xYxSi6O27 (x = 0, 0.1, 0.2, 0.3)

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-07-15 DOI:10.1007/s11837-025-07582-x

Dongliang Li, Xiangnan Wang

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Abstract

La_10−xY_xSi₆O₂₇ (x = 0, 0.1, 0.2, 0.3) ceramics were prepared by a two-step ball-milling method. This study aims to address the research gap in Y³⁺ doping of lanthanum silicate systems by systematically investigating the synergistic effects of Y³⁺ doping concentration on the phase structure stability, microstructural evolution, and total conduction behavior of apatite-type electrolyte materials. La_10-xY_xSi₆O₂₇ belongs to the hexagonal apatite structure, while the La₂SiO₅ secondary phase emerged when x ≥ 0.2. As the Y content continues to increase, a few pores appear in the sintered body, and Y ions are effectively integrated into the lattice of lanthanum silicate. The x = 0.1 sample demonstrates the maximum conductivity of 7.26 × 10^-3 S cm⁻¹ at 800°C, whereas the x = 0.2 composition shows an order-of-magnitude decrease in conductivity due to pore formation.

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Y掺杂对La10−xYxSi6O27 （x = 0,0.1, 0.2, 0.3）相结构、微观结构和电导率的影响

采用两步球磨法制备La10−xYxSi6O27 （x = 0,0.1, 0.2, 0.3）陶瓷。本研究旨在通过系统研究Y3+掺杂浓度对磷灰石型电解质材料相结构稳定性、微观结构演化和总导电行为的协同效应，弥补硅酸镧体系中Y3+掺杂的研究空白。La10-xYxSi6O27属于六方磷灰石结构，而当x≥0.2时出现La2SiO5次生相。随着Y含量的不断增加，烧结体中出现少量孔隙，Y离子有效地融入到硅酸镧的晶格中。x = 0.1样品在800°C时的最大电导率为7.26 × 10-3 S cm−1，而x = 0.2样品由于孔隙形成，电导率下降了一个数量级。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.