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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (4): 1346-1353.DOI: 10.16552/j.cnki.issn1001-1625.2025.0976

• 陶瓷 • 上一篇    下一篇

TEOS掺杂浓度对Tb3Al5O12陶瓷显微结构的影响

段萍萍1(), 万众2, 王银珍3, 甯杰妮3   

  1. 1.洛阳文化旅游职业学院数字与智能技术应用学院,洛阳 471000
    2.洛阳理工学院材料科学与工程学院,洛阳 471023
    3.华南师范大学物理学院,广州 510006
  • 收稿日期:2025-10-09 修订日期:2026-01-13 出版日期:2026-04-20 发布日期:2026-05-14
  • 作者简介:段萍萍(1990—),女,讲师。主要从事磁光陶瓷及发光材料的研究。E-mail:duanyhpch@163.com

Effect of TEOS Doping Concentration on Microstructure of Tb3Al5O12 Ceramics

DUAN Pingping1(), WAN Zhong2, WANG Yinzhen3, NING Jieni3   

  1. 1.College of Digital and Intelligent Technology Application,Luoyang Vocational College of Culture and Tourism,Luoyang 471000,China
    2.Materials Science and Engineering School,Luoyang Institute of Science and Technology,Luoyang 471023,China
    3.School of Physics,South China Normal University,Guangzhou 510006,China
  • Received:2025-10-09 Revised:2026-01-13 Published:2026-04-20 Online:2026-05-14

摘要:

铽铝石榴石(Tb3Al5O12, TAG)透明陶瓷是目前可见及近红外波段理想的磁光介质。本文采用商业化粉体为原料,结合反应烧结工艺,制备了不同正硅酸乙酯(TEOS)掺杂浓度的TAG陶瓷。系统探讨了Tb4O7粉体在升温过程中的脱氧反应机理,揭示了TEOS掺杂浓度对TAG陶瓷相演变及显微结构的影响,并明确了烧结温度与烧结助剂(TEOS)浓度对TAG磁光陶瓷相对密度和晶粒尺寸的影响规律。结果表明,实验前需对Tb4O7粉体进行高于1 000 ℃的煅烧,当采用0.4%(质量分数)TEOS作为烧结助剂,在1 600 ℃下进行无压烧结时,所制备的样品可获得97%的相对密度,平均晶粒尺寸约为3.7 μm,且内部无晶内气孔。将该样品进一步热等静压处理后,获得了较高光学质量的TAG陶瓷。

关键词: 磁光陶瓷, 铽铝石榴石(TAG), 正硅酸乙酯(TEOS), 掺杂浓度, 热等静压, 显微结构

Abstract:

Terbium aluminum garnet (Tb3Al5O12, TAG) transparent ceramics is an ideal magneto-optical medium for the visible and near-infrared regions owing to its excellent properties. In this work, TAG ceramics with different tetraethyl orthosilicate (TEOS) doping concentrations were prepared via reactive sintering using commercial powders as raw materials. The deoxygenation reaction mechanism of Tb4O7 powder during heating was systematically investigated. Furthermore, the influence of TEOS doping concentration on the phase evolution and microstructure of TAG ceramics was revealed, and the correlation of sintering temperature and TEOS concentration with the relative density and grain size of the ceramics was elucidated. The results indicate that pre-calcination of Tb4O7 powder above 1 000 ℃ is necessary. By doping with 0.4% (mass fraction) TEOS, TAG ceramics with a relative density of 97% are obtained after sintering at 1 600 ℃. The as-sintered material exhibits an average grain size of about 3.7 μm and a microstructure free of intergranular pores. Subsequently, highly transparent TAG ceramics are obtained by post-sintering hot isostatic pressing (HIP) treatment of the pre-sintered bodies.

Key words: magneto-optical ceramics, Tb3Al5O12 (TAG), tetraethyl orthosilicate (TEOS), doping concentration, hot isostatic pressing, microstructure

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