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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (1): 85-92.DOI: 10.16553/j.cnki.issn1000-985x.2025.0174

• 研究论文 • 上一篇    下一篇

两次热压烧结法制备镁铝尖晶石透明陶瓷的研究

雷牧云1(), 王颖2, 凌昊2, 王海丽2, 李祯1, 张立生1   

  1. 1.中材人工晶体研究院有限公司,北京 100018
    2.北京中材人工晶体研究院有限公司,北京 100018
  • 收稿日期:2025-08-01 出版日期:2026-01-20 发布日期:2026-02-05
  • 作者简介:雷牧云(1971—),女,黑龙江省人,博士,教授级高工。E-mail:lmyam0512@ sina.com
  • 基金资助:
    国家重点研发计划(2022YFB3705900)

Fabrication of Magnesium-Aluminate Spinel Transparent Ceramics by Two Cycles of Hot Pressing Sintering Method

LEI Muyun1(), WANG Ying2, LING Hao2, WANG Haili2, LI Zhen1, ZHANG Lisheng1   

  1. 1. Sinoma Synthetic Crystals Co. ,Ltd. ,Beijing 100018,China
    2. Beijing Sinoma Sythentic Crystal Co. ,Ltd. ,Beijing 100018,China
  • Received:2025-08-01 Online:2026-01-20 Published:2026-02-05

摘要: 本文采用纯度99.999%的镁铝尖晶石粉体,用两次热压烧结法结合热等静压(HIP)工艺制备了镁铝尖晶石透明陶瓷,其中,第一次热压烧结采用热压模具在较低温度下进行,第二次热压烧结去除热压模具在较高温度下进行。SEM观察了粉体和陶瓷样品断面的形貌,测试了陶瓷样品的透过率。可以看出,两次热压烧结法制备的透明陶瓷与常规的热压烧结制备的透明陶瓷相比,样品断面微观形貌略有不同,透过率相当,其在可见到中波红外的大部分波段的透过率均可达到80%以上。研究结果表明,利用二次热压烧结法可以采用较小尺寸的热压模具和热压设备制备出较大尺寸且透过率较高的透明陶瓷。

关键词: 镁铝尖晶石; 透明陶瓷; 两次热压烧结; 热压模具; 形貌; 透过率; 较大尺寸

Abstract: In this study, high-purity (99.999%) magnesium-aluminate spinel (MgAl2O4) powder was used to fabricate transparent magnesium-aluminate spinel ceramics through a two cycles of hot pressing sintering method combined with hot isostatic pressing (HIP). The first hot pressing was conducted at a relatively low temperature using a hot pressing mold, while the second hot pressing step was performed at a higher temperature without a mold. The morphology of the powder and the fracture surface of the ceramic samples were observed using SEM, and the optical transmittance of the ceramics were measured. Compared to conventional hot pressed transparent ceramics, the samples prepared by two cycles of hot pressing sintering exhibit slight differences in their fracture surface microstructure, while their transmittance remains comparable. The ceramics exhibit transmittance exceeding 80% over most wavelengths from visible to mid-wave infrared spectrum. The two cycles of hot pressing sintering method enables the production of larger transparent ceramics using relatively small hot pressing molds and equipment.

Key words: magnesium-aluminate spinel; transparent ceramics; two cycles of hot pressing sintering; hot pressing mold; morphology; optical transmittance; larger size

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