Regulation of oxygen vacancies in ITO powders and its impact on densification behavior

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-16 DOI:10.1016/j.jeurceramsoc.2025.117829

Weilong Zhong , Jishu Zeng , Xingyu Zhou , Long Hu , Yecheng Liang , Min Lin , Yimin Li , Zhijie Fang , Yongqing Wang

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Abstract

The concentration of oxygen vacancies in ITO (indium tin oxide) powders plays a critical role in determining their optoelectronic properties and sintering performance. In this study, ITO powders with varying oxygen vacancy concentrations—24.05 %, 29.80 %, 30.86 %, and 44.74 %—were prepared by annealing in four different atmospheres: H₂, Ar, N₂, and O₂, respectively. The sintering densification behaviors of these powders were systematically investigated using TMA. The results indicated that in the initial sintering stage (800–1050°C), a higher oxygen vacancy concentration (44.74 % in ITO-H₂) significantly enhanced densification. However, the highest final density (>85 %) was achieved by the ITO-O₂ sample with the lowest oxygen vacancy concentration (24.05 %) after the second stage (1050–1350°C) and the final stage (1350–1500°C) of sintering shrinkage. Notably, the ITO powder annealed in N₂ exhibited significantly poor densification during all stages, reducing linear shrinkage by 16 %, which was attributed to the formation of Sn-N bonds.

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ITO粉末中氧空位的调控及其对致密化行为的影响

氧化铟锡粉末中氧空位的浓度是决定其光电性能和烧结性能的关键因素。在本研究中，通过在H2、Ar、N2和O2四种不同气氛下退火，制备了氧空位浓度分别为24.05 %、29.80 %、30.86 %和44.74 %的ITO粉末。采用TMA对粉末的烧结致密化行为进行了系统的研究。结果表明：在烧结初期（800 ~ 1050℃），较高的氧空位浓度（ITO-H2中氧空位浓度为44.74 %）显著促进了致密化；而ITO-O2样品在第二阶段（1050 ~ 1350℃）和最后阶段（1350 ~ 1500℃）烧结收缩后，氧空位浓度最低（24.05 %），最终密度最高（>85 %）。值得注意的是，在N2中退火的ITO粉末在所有阶段都表现出明显的致密化，线性收缩率降低了16% %，这是由于Sn-N键的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.