SURFACE BEHAVIOR OF BIOACTIVE GLASS OFSi–Na–Ca–PSYSTEM IN SIMULATED BODY FLUID

Jie Ma, Chuanzhong Chen (), Diangang Wang, Xing Dang, Ruiliang Bao and Liang Yao
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Jie Ma: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Chuanzhong Chen: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Diangang Wang: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Xing Dang: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Ruiliang Bao: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China
Liang Yao: School of Materials Science and Engineering, Shandong University, Shandong Ji'nan 250061, P. R. China

Surface Review and Letters (SRL), 2007, vol. 14, issue 01, 49-55

Abstract: Glass of theSi–Na–Ca–Psystem has been synthesized by normal melting and annealing technique. The obtained glass powders and annealed blocks were showed to be amorphous by X-ray diffraction (XRD). The thermal properties of glasses were analyzed by differential scanning calorimetry (DSC), it showed that the glass transformation temperature(Tg)was 556.3°C. The behavior of annealed glass discs in simulated body fluid solution (SBF) was studied in polyethylene containers at a constant temperature of 37°C for different time up to 14 days. The changes in the surface morphology and composition were observed by electronic probe microanalyzer (EPMA) associated with energy dispersive spectroscopy (EDS). Glass surface changed quickly as soon as immersion took place, and after longer soaking time, it showed different superimposed internal and external layers, which were identified asSiO2-rich andCaO–P2O5-rich layers, and on the external layer, spherical particles were also discovered.

Keywords: Bioactive glass; in vitrotests; surfaces behavior; apatite layer (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009062

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