X-ray investigation of sintered cadmium doped hydroxyapatites

EVİS Z., Yilmaz B., USTA M., AKTUĞ S. L.

CERAMICS INTERNATIONAL, cilt.39, sa.3, ss.2359-2363, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.ceramint.2012.08.087
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2359-2363
  • Anahtar Kelimeler: Sintering, X-ray methods, Apatite, Cadmium, MECHANICAL-PROPERTIES, MORPHOLOGY VARIATION, AQUEOUS-SOLUTIONS, APATITES, REMOVAL, HYDROXYLAPATITE, METAL, LEAD, TEMPERATURE, PHOSPHATES
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Pure and cadmium (Cd) doped hydroxyapatites (HA, Ca-10(PO4)(6)(OH)(2)) were synthesized by a precipitation method from aqueous solutions of Ca(NO3)(2)4 center dot H2O for the former and Cd(NO3)(2)4 center dot H2O for the latter, by using (NH4)(2)HPO4 as the phosphate source, while pH was kept in the range of 11-12. The effect of incorporation of Cd2+ ions into the structure of HA was investigated after the air sintering at 1100 degrees C for 1 h. The results indicate that Cd2+ addition into HA yields nearly fully densified products with respect to pure stoichiometric HA. The XRD patterns showed that Cd doping increases the crystallinity of HA. The 2, 4.4, and 8.8 mol% Cd doped HAs had calcium oxide (CaO) impurity phase in their lattice. The CaO phase in the HA structure gradually disappeared with increasing Cd amount, and was replaced with cadmium oxide (CdO) in the CdHA doped with 11 mol% Cd. Cd2+ ion incorporation decreased the a- and c-axis lattice constants and unit cell volume of HA. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.