华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (9): 95-98.

• 材料科学与技术 • 上一篇    下一篇

ZrO2掺杂TiO2纳米粉的共沉淀法制备及相变

吕明 饶平根 吴建青   

  1. 华南理工大学 材料科学与工程学院,广东 广州 510640
  • 收稿日期:2005-09-12 出版日期:2006-09-25 发布日期:2006-09-25
  • 通信作者: 吕明(1967-),女,讲师,主要从事高性能陶瓷材料的研究 E-mail:immlv@scut.edu.cn
  • 作者简介:吕明(1967-),女,讲师,主要从事高性能陶瓷材料的研究
  • 基金资助:

    广东省科技计划项目(2004B103101007);华南理工大学自然科学基金资助项目(E5324182)

Preparation of Zirconia-Doped Titania Nanopowders by Co-Precipitation Method and Corresp0nding Phase Transformation

Lu Ming  Rao Ping-gen  Wu Jian-qing   

  1. School of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-09-12 Online:2006-09-25 Published:2006-09-25
  • Contact: 吕明(1967-),女,讲师,主要从事高性能陶瓷材料的研究 E-mail:immlv@scut.edu.cn
  • About author:吕明(1967-),女,讲师,主要从事高性能陶瓷材料的研究
  • Supported by:

    广东省科技计划项目(2004B103101007);华南理工大学自然科学基金资助项目(E5324182)

摘要: 为探讨离子掺杂对晶体相变的促进或抑制作用,采用共沉淀法制备了Zr4+掺杂量分别为0,2% ,5% ,7% ,10%和13%(摩尔分数,余同)的纳米TiO2,研究Zr4+ 掺杂对TiO2,从纳米锐钛矿型向金红石型转变的影响,透射电子显微镜研究显示所制备的锐钛矿型TiO2 的颗粒直径在10~20nm之间,经x射线衍射研究发现,少量的Zr4 掺杂抑制了锐钛矿晶粒的长大,将锐钛矿开始向金红石转变的相变温度从750℃提高到850℃.锆可与TiO2,反应生成化合物ZrTiO4 ,为避免该化合物的生成,Zr4+ 掺杂量不宜超过10% .

关键词: 氧化钛, 锆, 相变, 掺杂, 共沉淀

Abstract:

In order to reveal the promotion or restraint of phase transformation caused by the doping of ions,nano-sized TiO2 doped with Zr4+ was prepared by means of co-precipitation method,respectively with the Zr mole frae-tions of 0,2% ,5% ,7% ,10% and 13% .The influence of Zr4+ doping on the phase transform ation of TiO2, fronano-sized anatase to rutile was then investigated. TEM results indicate that the prepared TiO2 anatase is 1 0 to 20 nm in diameter.XRD results show that the Zr4+ doping restrains the growth of anatase ertstallites,improves the start temperature of phase transform ation from 750℃ to 850℃ .Moreover,in order to avoid the form ation of ZrTiO4 from the reaction of Zr and TiO2,the mole fraction of doped Zr4+should be less than 10% .

Key words: titania, zirconium, phase transformation, doping, co-precipitation