J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (5): 426-430.

• Reviews • 上一篇    下一篇

Fabrication, sintering and electrical properties of (Ca0.61,Nd0.26)TiO3 nanoparticles doped with Li-Cu-B

吴飞1,2,张启龙3,杨辉1   

  1. 1.
    2. 浙江大学材料系
    3. 浙江大学
  • 收稿日期:2010-11-22 修回日期:2011-01-14 出版日期:2011-05-28 发布日期:2011-05-28
  • 通讯作者: 张启龙

Fabrication, Sintering and Electrical Properties of (Ca0.61,Nd0.26)TiO3 Nanoparticles Doped with Li-Cu-B

Fei Wu, Qilong Zhang, Hui Yang   

  1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2010-11-22 Revised:2011-01-14 Online:2011-05-28 Published:2011-05-28
  • Contact: Qilong Zhang
  • Supported by:

    the National Key Technology Support Program (No. 2009BAG12A07)

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摘要： A sol-gel processing was used to synthesize (Ca0.61,Nd0.26)TiO3 (CNT) nanoparticles doped with Li-Cu-B at low temperature. Orthorhombic perovskite structure phase with a small amount of Li3BO3 secondary phase were formed by calcining the xerogels at 300°C, and monodisperse CNT nano-powders with the grain size of 10-15nm could be obtained. Using these nanocrystalline CNT powders, dense CNT ceramics could be achieved at the low sintering temperature of 1100°C due to the effect of the small size nanoparticles and liquid phase Li3BO3. And the dielectric properties of dielectric constant (εr)= 89.52, Q×f value = 17148 GHz and the τf value of +239 ppm ?C-1 were achieved.

Abstract: A sol-gel processing was used to synthesize (Ca0.61,Nd0.26)TiO3 (CNT) nanoparticles doped with Li-Cu-B at low temperature. Orthorhombic perovskite structure phase with a small amount of Li3BO3 secondary phase was formed by calcining the xerogels at 300°C, and monodisperse CNT nano-powders with the grain size of 10−15 nm could be obtained. By using these nanocrystalline CNT powders, dense CNT ceramics could be achieved at the low sintering temperature of 1100°C due to the effect of the small size nanoparticles and liquid phase Li3BO3. And the dielectric properties with dielectric constant (εr= 89.52), quality value factors with frequency (Q£f=17148 GHz) and the temperature coefficient of resonant frequency (τf ) value of +239×10-6/°C were achieved.

Key words: Sol-gel preparation, Nanomaterials, Electrical properties, Sintering