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Citation: TAN Xiao-Ping, GU Ying-Ying, LIANG Shu-Quanb. Effect of La³⁺, Nd³⁺, Ti⁴⁺ Doping on the Structure of Nano-MnZn Ferrite Powders[J]. Chinese Journal of Applied Chemistry, ;2004, 21(3): 271-275. shu

Effect of La³⁺, Nd³⁺, Ti⁴⁺ Doping on the Structure of Nano-MnZn Ferrite Powders

1.
a College of Chemistry and Chemical Engineering, Central South University, Changsha 410083;
2.
b College of Materials Science and Engineering, Central South University, Changsha 410083

Corresponding author: TAN Xiao-Ping,
Received Date: 14 June 2003
Available Online: 20 November 2003
Fund Project: 国家"十五"攻关项目子课题(2001BA901A09)项目 (2001BA901A09)

MnZn ferrite nanosized particles are synthesized by using a hydrothermal method. Effects of the added amount of La³⁺, Nd³⁺, Ti⁴⁺ and multi-elements on the particle size and shape and structure of the products are investigated. The results show that the particle size of Ti-doped MnZn ferrite powders is increased obviously and even over 100 nm when the mass fraction of Ti⁴⁺ exceeds 1.0%, but the addition of La³⁺ or Nd³⁺ has not obvious effect on the particle size of nano-MnZn ferrite powders. The TEM micrographs give homogeneous hexagonal crystallites when the mass fraction of La³⁺ is 1.2%, indicating that such an amount of La³⁺ ions have great influence on the crystallization of the hydrothermal process and can change and improve the growth of crystallites. In the samples doped with 0.4% La³⁺ or Nd³⁺ other phases besides the spinel are observed, but it is not in the case of multi-element doping. The spinel characteristic peaks in IR spectrum of nano-MnZn ferrite sample with dopants is found to be moved to lower frequency as compared with that of the undoped, implying that the distribution of the ions in MnZn has been influenced by the introduction of doping ions into the paracorystalline phase of the ferrite.
- hydrothermal method,
- nano-MnZn ferrite,
- La³⁺,
- Nd³⁺
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Effect of La³⁺, Nd³⁺, Ti⁴⁺ Doping on the Structure of Nano-MnZn Ferrite Powders