Surface and Bulk Contributions in the Crystallization Process of a Bioactive Glass
Bioactive glasses have attracted considerable interest in recent years. In this work, Differential Thermal Analysis (DTA) measurements were performed on bulk and powdered samples of the SiO2-Na2O-CaO-P2O5 glass system, in order to study the particle size effect on the crystal growth and nucleation process. A shift of the crystallization peak to lower temperatures and deconvolution of a slightly asymmetric crystallization peak into two separate peaks were observed with decreasing particle size. The bioactive behavior -through the process of immersion SBF- of the specific glass is studied as a function of particle size. A better bioactive response was observed increasing particle size until a specific size, further increase leading in no further improvement in the bioactive behavior.
Takashi Nakamura, Kimihiro Yamashita and Masashi Neo
X. Chatzistavrou et al., "Surface and Bulk Contributions in the Crystallization Process of a Bioactive Glass", Key Engineering Materials, Vols. 309-311, pp. 313-316, 2006