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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (8): 2899-2908.DOI: 10.16552/j.cnki.issn1001-1625.2026.0137

• 陶瓷 • 上一篇    下一篇

SPS结合热等静压烧结制备Mg0.75Al2.16O4透明陶瓷及其性能研究

吴文滔1(), 涂广升1, 廖家兴1, 张超杰1, 涂兵田1,2(), 王皓1,2   

  1. 1.武汉理工大学材料复合新技术全国重点实验室,武汉 430070
    2.湖北隆中实验室,襄阳 441000
  • 收稿日期:2026-02-04 修订日期:2026-03-10 出版日期:2026-08-15 发布日期:2026-09-01
  • 通信作者: 涂兵田,博士,研究员。E-mail:tubt@whut.edu.cn
  • 作者简介:吴文滔(1999—),男,硕士研究生。主要从事透明陶瓷材料的研究。E-mail:1906914377@qq.com
  • 基金资助:
    国家重点研发计划(2023YFB3812000);国家自然科学基金(52272072);湖北省重点研发计划(2024BAB111)

Fabrication and Properties of Mg0.75Al2.16O4 Transparent Ceramics by SPS Combined with Hot Isostatic Pressing

WU Wentao1(), TU Guangsheng1, LIAO Jiaxing1, ZHANG Chaojie1, TU Bingtian1,2(), WANG Hao1,2   

  1. 1.State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
    2.Hubei Longzhong Laboratory,Xiangyang 441000,China
  • Received:2026-02-04 Revised:2026-03-10 Published:2026-08-15 Online:2026-09-01

摘要:

富铝尖晶石透明陶瓷因优异的力学和光学性能,在光电窗口和透明装甲等领域具有重要应用前景。本研究以单相Mg0.75Al2.16O4粉体为原料,采用放电等离子烧结结合热等静压(HIP)处理制备透明陶瓷,系统研究了压力辅助烧结过程中陶瓷物相和显微结构的演化过程。结果表明,在1 300 ℃时,样品中开始析出大量α-Al2O3第二相,随着烧结温度的升高,α-Al2O3相含量逐渐减少,并在1 500 ℃时完全消失;在1 400 ℃条件下可获得晶粒细小、气孔较少的陶瓷预烧体,经HIP处理后制备的透明陶瓷平均晶粒尺寸约为2.88 μm,在可见光(500 nm)和红外波段(2 500 nm)的直线透过率分别达到72%和84%。得益于细晶结构的形成,样品维氏硬度达到14.3 GPa,较常规MgAl2O4透明陶瓷材料提高约10%。本研究为富铝尖晶石透明陶瓷的细晶化制备及性能调控提供了参考。

关键词: Mg0.75Al2.16O4, 透明陶瓷, 放电等离子烧结, Al2O3相, 力学性能

Abstract:

Aluminum-rich spinel transparent ceramics exhibit excellent mechanical and optical properties and have significant application potential in optoelectronic windows and transparent armor. In this study, transparent ceramics were prepared from single-phase Mg0.75Al2.16O4 powders by spark plasma sintering combined with hot isostatic pressing (HIP) treatment. The phase composition and microstructural evolution of the ceramics during pressure-assisted sintering were systematically investigated. The results show that a significant amount of α-Al2O3 secondary phase precipitates in samples at 1 300 ℃. With increasing SPS pre-sintering temperature, the content of the α-Al2O3 phase gradually decreases and completely disappears at 1 500 ℃. Pre-sintered ceramics with fine grains and low porosity are obtained at 1 400 ℃. After HIP treatment, the transparent ceramics exhibit an average grain size of approximately 2.88 μm, and the in-line transmittance in the visible and infrared regions reaches 72% (500 nm) and 84% (2 500 nm), respectively. Benefiting from the formation of a fine-grained microstructure, the Vickers hardness of the samples reaches 14.3 GPa, which is about 10% higher than that of conventional MgAl2O4 transparent ceramics. This study provides insight into the fabrication and performance modulation of aluminum-rich spinel transparent ceramics with refined microstructures.

Key words: Mg0.75Al2.16O4, transparent ceramics, spark plasma sintering, Al2O3 phase, mechanical property

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