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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (1): 256-263.DOI: 10.16552/j.cnki.issn1001-1625.2025.0641

• 陶瓷 • 上一篇    下一篇

纳米TiO2对Al2O3陶瓷烧结特性的影响

陈友梅1(), 李镒成1, 何婷1, 刘应寿1, 黎阳1(), 肖汉宁2, 袁谋云3, 张伟群4   

  1. 1.贵州师范大学材料与建筑工程学院,贵阳 550025
    2.湖南大学材料科学与工程学院,长沙 410082
    3.贵州新园特种陶瓷科技有限公司,凯里 556011
    4.贵州群华九九特种陶瓷科技有限公司,凯里 556011
  • 收稿日期:2025-07-02 修订日期:2025-09-02 出版日期:2026-01-20 发布日期:2026-02-10
  • 通信作者: 黎 阳,博士,教授。E-mail:liyang3300@163.com
  • 作者简介:陈友梅(2000—),女,硕士研究生。主要从事氧化铝陶瓷和固废资源化方面的研究。E-mail:2451059014@qq.com
  • 基金资助:
    贵州省科技计划项目(黔科合中引地〔2025〕020);贵州省教育厅自然科学研究项目(黔教技〔2022〕045);贵州省教育厅自然科学研究项目(黔教技〔2022〕012)

Effect of Nano-TiO2 on Sintering Characteristics of Al2O3 Ceramics

CHEN Youmei1(), LI Yicheng1, HE Ting1, LIU Yingshou1, LI Yang1(), XIAO Hanning2, YUAN Mouyun3, ZHANG Weiqun4   

  1. 1. School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China
    2. College of Materials Science and Engineering,Hunan University,Changsha 410082,China
    3. Guizhou Xinyuan Special Ceramic Technology Co. ,Ltd. ,Kaili 556011,China
    4. Guizhou Qunhuajiujiu Special Ceramic Technology Co. ,Ltd. ,Kaili 556011,China
  • Received:2025-07-02 Revised:2025-09-02 Published:2026-01-20 Online:2026-02-10

摘要:

以煅烧α-Al2O3粉体为原料、纳米TiO2为烧结助剂、羧甲基纤维素为成型黏结剂,采用模压成型-常压烧结制备了Al2O3陶瓷,研究了烧结温度及纳米TiO2添加量对Al2O3陶瓷微观形貌、线收缩率、物相结构、体积密度、孔隙率、抗折强度和白度的影响,评估了烧结特性。结果表明,添加适量纳米TiO2能够显著提高Al2O3陶瓷的烧结性能,而过量纳米TiO2会造成Al2O3晶粒异常长大,进而导致收缩率和体积密度降低、孔隙率增大。当纳米TiO2添加量为0.7%(质量分数)、烧结温度为1 500 ℃时,Al2O3陶瓷性能较为优异,其抗折强度达到最大值,为(188.89±5.87) MPa,体积密度、孔隙率和白度分别为3.45 g·cm-3、7.78%和76.6。

关键词: Al2O3陶瓷, 纳米TiO2, 模压成型, 烧结温度, 烧结助剂

Abstract:

Al2O3 ceramics were prepared by compression molding and pressureless sintering using calcined α-Al2O3 powder as raw material, nano-TiO2 as sintering aid and carboxymethyl cellulose as binder. The effects of sintering temperature and nano-TiO2 addition on microstructure, linear shrinkage, phase structure, bulk density, porosity, flexural strength and whiteness of Al2O3 ceramics were studied, and the sintering characteristics were evaluated. The results show that the addition of appropriate amount of nano-TiO2 can significantly improve the sintering performance of Al2O3 ceramics, while excessive nano-TiO2 will cause the abnormal growth of Al2O3 grains, which will lead to the decrease of shrinkage and bulk density and the increase of porosity. When the addition amount of nano-TiO2 is 0.7% (mass fraction) and the sintering temperature is 1 500 ℃, the properties of Al2O3 ceramics are excellent. The flexural strength reaches the maximum value of (188.89 ± 5.87) MPa, and the bulk density, porosity and whiteness are 3.45 g·cm-3, 7.78% and 76.6.

Key words: Al2O3 ceramics, nano-TiO2, compression molding, sintering temperature, sintering additive

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