J Mater Sci Technol ›› 2008, Vol. 24 ›› Issue (02): 285-288.

• Research Articles • Previous Articles    

Effect of Additives on the Morphology of the Hydrated Product and Physical Properties of a Calcium Phosphate Cement

Xiupeng WANG, Jiandong YE, Yingjun WANG   

  1. Key Laboratory of Specially Functional Materials (Ministry of Education) and School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
  • Received:2006-09-15 Revised:2007-01-11 Online:2008-03-28 Published:2009-10-10
  • Contact: Jiandong YE

Abstract: The morphology of a hydrated calcium phosphate cement (CPC) doped with several normally used additives was investigated by scanning electron microscopy (SEM) and the compressive strength of the cement was determined in this study. The hydrated products of CPC without additives was rod-like hydroxyapatite (HA) grains with around 2-5 μm in length and 100 nm in width. The addition of Sr obviously decreased the crystal size of the rod-like grains. CPCs containing carbonate, collagen and gelatin showed flake-like crystal morphology. Crylic acid-containing CPC presented flocculus-like structure. And malic acid-containing CPC exhibited oriented flake-like structure. The X-ray diffraction (XRD) analysis showed that the additives used in this study did not alter the hydration products of the cement. The compressive strength tests indicated that the compressive strength of the cement with rod-like morphology HA crystals was much higher than that of the cement with flake-like morphology HA crystals, and the cement with oriented flake-like morphology HA crystals exhibited the poorest compressive strength.

Key words: Calcium phosphate cement, Morphology, Apatite