化工进展 ›› 2021, Vol. 40 ›› Issue (S2): 309-314.DOI: 10.16085/j.issn.1000-6613.2021-0730

• 材料科学与技术 • 上一篇    下一篇

液相法制备棒状Al2O3及Al2O3-ZrO2陶瓷复合粉体

靳元勋1(), 霍地1(), 孙旭东1,2   

  1. 1.东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,辽宁 沈阳 110819
    2.东北大学佛山研究生院,广东 佛山 528311
  • 收稿日期:2021-04-07 修回日期:2021-05-07 出版日期:2021-11-12 发布日期:2021-11-12
  • 通讯作者: 霍地
  • 作者简介:靳元勋(1995—),男,硕士研究生,研究方向为陶瓷粉末制备。E-mail:1377225714@qq.com
  • 基金资助:
    国家自然科学基金(51872033)

Preparation of rod-like Al2O3 and Al2O3-ZrO2 ceramic composite powders in aqueous solution

JIN Yuanxun1(), HUO Di1(), SUN Xudong1,2   

  1. 1.School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
    2.Foshan Graduate School of Northeastern University, Foshan 528311, Guangdong, China
  • Received:2021-04-07 Revised:2021-05-07 Online:2021-11-12 Published:2021-11-12
  • Contact: HUO Di

摘要:

采用二乙三胺五乙酸(DTPA)为配合剂,以简易的液相法合成出微纳米纤维状Al和Al-Zr前体,煅烧处理制备了棒状α-Al2O3和Al2O3-ZrO2复合陶瓷粉体。同时研究了DPTA∶Al3+质量比、反应温度与时间对陶瓷粉体形态的影响。利用X射线衍射(XRD)、热分析(TG/DSC)以及扫描电子显微镜(SEM)对粉体进行了表征。结果表明:较高的DTPA∶Al3+质量比以及较长的反应时间有利于制备高长径比的纤维棒状Al和Al-Zr配合物前体。合成纳米纤维状α-Al2O3和Al2O3-ZrO2前体的最优条件是反应温度60℃,反应时间5.5h,DTPA∶Al3+比例为1.2∶1。相应地,该前体煅烧后可以制备出棒状α-Al2O3和Al2O3-ZrO2复合陶瓷粉体。

关键词: 棒状粉体, α-Al2O3, Al2O3-ZrO2, 液相法, 二乙三胺五乙酸

Abstract:

Using diethylenetriaminepentaacetic acid (DTPA) as coordination agent, the micro/nano Al and Al-Zr fibrous precursors were synthesized by a simple liquid synthesis method, and further calcined to make rod-like α-Al2O3 ceramic and Al2O3-ZrO2 composite powders. The effects of mass ratio of DTPA to Al3+, reaction temperature and time on the morphology of ceramic powders were simultaneously studied. The powders were characterized by X-ray diffraction (XRD), thermal analysis (TG/DSC) and scanning electron microscope (SEM). The results show that higher mass ratio of DTPA to Al3+ along with longer reaction time are favorable for the preparation of fibrous Al and Al-Zr complex precursors with high aspect ratio. The optimized conditions to prepare the nanofibrous α-Al2O3 and Al2O3-ZrO2 precursors are controlled the mass ratio with m(DTPA)∶m(Al3+)=1.2∶1 at 60℃ for 5.5h. Correspondingly, rod-shaped α-Al2O3 and Al2O3-ZrO2 composite ceramic powders can be prepared by calcining these precursors.

Key words: rod-like powders, α-Al2O3, Al2O3-ZrO2 composites, low-temperature liquid phase synthesis, diethylenetriaminepentaacetic acid(DTPA)

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