J. Mater. Sci. Technol. ›› 2014, Vol. 30 ›› Issue (8): 776-781.DOI: 10.1016/j.jmst.2014.06.001

• Orginal Article • Previous Articles     Next Articles

Influences of Reaction Parameters and Ce Contents on Structure and Properties of Nano-scale Ce-HA Powders

L.J. Sun1, D.G. Guo1, *, W.A. Zhao2, 3, **, L.Y. Wang4, K.W. Xu1, 5   

  1. 1 State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; 2 Chao Family Comprehensive Cancer Center, Department of Pharmaceutical Sciences,University of California Irvine, Irvine, CA 92697, USA; 3 Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine, CA 92697, USA; 4 The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; 5 Xi’an University of Arts and Science, Xi’an 710065, China
  • Received:2013-05-07 Online:2014-05-20 Published:2014-09-30
  • Contact: * Corresponding author. Prof., Ph.D.; Tel.: t86 29 82668614; Fax: t8629 82663453; E-mail address: guodagang@mail.xjtu.edu.cn (D.G. Guo); ** Corresponding author. Prof., Ph.D; E-mail address: weianz@uci.edu (W.A. Zhao).

Abstract: Ce-incorporated apatite (Ce-HA) nano-scale particles with different Ce percentage contents (atomic ratio of Ce to Ce + Ca is 5%, 10% and 20%, respectively) were synthesized via a simple wet chemical method in this study. The crystal structure, chemical groups, thermal stability, crystal morphologies and crystal sizes of the Ce-HA nano-particles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The influences of reaction temperature, reaction time, pH value, and the atomic ratio of Ce to Ce + Ca on the structure and performance of Ce-HA particles were studied. The results show that the lattice constants, particle sizes, crystallinity and thermal stability of Ce-HA vary with the doped Ce contents. With the increase of Ce content, the lattice constants of the Ce-HA nano-particles remarkably increase but the particle size, crystallinity and thermal stability gradually decrease. The reaction temperature as well as the reaction time has no significant effect on the properties of the final products, while the pH value has a direct relationship with their final chemical composition. The obtained Ce-HA nano-size particles possess potential application in preparing artificial bone implants, bone tissue engineering scaffold and other bioactive coatings.

Key words: Cerium, Apatite, Nano-scale powder, Wet chemical approach, Biomedical materials