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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (1): 77-84.DOI: 10.16553/j.cnki.issn1000-985x.2025.0147

• 研究论文 • 上一篇    下一篇

Y2O3对MgAl2O4透明陶瓷光学及力学性能的影响

滕蔓1(), 刘庆辉1, 刘鹏1(), 李镔2, 王海丽3   

  1. 1.江苏师范大学物理与电子工程学院,江苏省先进激光材料与器件重点实验室,徐州 221116
    2.中材高新氮化物陶瓷有限公司,淄博 255000
    3.北京中材人工晶体研究院有限公司,北京 100018
  • 收稿日期:2025-07-14 出版日期:2026-01-20 发布日期:2026-02-05
  • 通信作者: 刘鹏
  • 作者简介:滕蔓(1997—),女,江苏省人,硕士研究生。E-mail:t18751492645@163.com
  • 基金资助:
    国家重点研发计划(2022YFB3705900)

Effect of Y2O3 on Optical and Mechanical Properties of MgAl2O4 Transparent Ceramics

TENG Man1(), LIU Qinghui1, LIU Peng1(), LI Bin2, WANG Haili3   

  1. 1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices,School of Physics and Electronics Engineering,Jiangsu Normal University,Xuzhou 221116,China
    2. Sinoma Advanced Nitride Ceramics Co. ,Ltd. ,Zibo 255000,China
    3. Beijing Sinoma Synthetic Crystals Co. ,Ltd. ,Beijing 100018,China
  • Received:2025-07-14 Online:2026-01-20 Published:2026-02-05
  • Contact: LIU Peng

摘要: 镁铝尖晶石(MgAl2O4)透明陶瓷具有透光范围广、力学强度高、耐高温等优点,在透明装甲、红外窗口和整流罩等领域具有巨大的应用潜力。但MgAl2O4中的氧离子扩散系数比较低,烧结致密化难,在烧结过程中往往需要引入烧结助剂。稀土倍半氧化物在高温下不易挥发,可有效促进MgAl2O4陶瓷的致密化。本文以商业MgAl2O4粉体为原料,以Y2O3为烧结助剂,采用无压预烧结结合热等静压(HIP)的方法,成功制备MgAl2O4透明陶瓷,并采用扫描电子显微镜(SEM)、紫外-可见-近红外(UV-Vis-NIR)分光光度计、万能试验机等测试手段对微观结构、光学和力学性能进行表征和分析。结果表明:当掺杂0.020%(质量分数)Y2O3的MgAl2O4透明陶瓷在1 525 ℃无压预烧结结合1 600 ℃ HIP后,所制得样品透过率最佳,在550和3 000 nm处透过率分别可达84.5%和87.8%,抗弯强度达333.2 MPa;与未掺杂Y2O3的样品相比,掺杂0.020%的MgAl2O4透明陶瓷的平均晶粒尺寸由8 μm减小到4 μm,抗弯强度提高了9.79%。

关键词: 镁铝尖晶石; 透明陶瓷; Y2O3; 烧结助剂; 透过率; 抗弯强度

Abstract: Magnesium aluminate spinel (MgAl2O4) transparent ceramics exhibit superior properties including broad optical transmission range, high mechanical strength, and excellent thermal stability, demonstrating significant application potential in the fields of transparent armor, infrared windows, and fairing. However, the diffusion coefficient of oxygen ions in MgAl2O4 is relatively low, and the sintering densification is difficult. Therefore, sintering aid is often introduced during the sintering process. Rare earth sesquioxides, being resistant to volatilization at high temperature, have been shown to effectively promote the densification of MgAl2O4 ceramics. This study employed commercially available MgAl?O? powder as the raw material and Y2O3 as the sintering aid. The MgAl2O4 transparent ceramics were successfully prepared through a combination of pressureless presintering and hot isostatic pressing (HIP). The microstructure, optical and mechanical properties were systematically characterized and analyzed by scanning electron microscopy (SEM), UV-Vis-NIR spectrophotometry, and universal testing machine. The results indicate that the MgAl2O4 ceramics doped with 0.020%(mass fraction) Y2O3 prepared by pressureless presintering at 1 525 ℃ and HIP at 1 600 ℃, the prepared sample exhibits optimal transmittance. The transmittance at 550 and 3 000 nm reaches 84.5% and 87.8%, respectively, while the flexural strength reaches 333.2 MPa. Compared with the undoped Y2O3 samples, the average grain size of the MgAl2O4 ceramics doped with 0.020% Y2O3 decrease from 8 μm to 4 μm, and the flexural strength is increase by 9.79%.

Key words: magnesium aluminate spinel; transparent ceramics; Y2O3; sintering aid; transmittance; flexural strength

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