Studies on influence of aluminium ions on the bioactivity of B2O3–SiO2–P2O5–Na2O–CaO glass system by means of spectroscopic studies

• Published in: Applied surface science 2013-12, Vol.287, p.46-53
• Main Authors: Mohini, G. Jagan, Krishnamacharyulu, N., Sahaya Baskaran, G., Rao, P. Venkateswara, Veeraiah, N.
• Format: Article
• Language: English
• Subjects: Aluminium; Aluminium ions; Aluminum; Aluminum oxide; B2O3–SiO2–P2O5–Na2O–CaO glass system; Bioactivity; Biochemistry; Concentration (composition); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Glass; Physics; Spectroscopic analysis; Spectroscopic studies; Spectroscopy
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2013.09.055

Optical band gap of the B2O3–SiO2–P2O5–Na2O–CaO: Al2O3 glasses before and after immersion in SBF solution for 30 days. •Conventional bioactive boron added glasses mixed with Al2O3 were synthesized.•Bioactivity of the samples was studied in SBF solution.•Bioactivity is explained by structural analysis using OA and MIR techniques.•Al3+ ions in tetrahedral positions is hindrance for the formation of HA layer. Bioactive multi component glasses of the composition of 27.4B2O3–6.4SiO2–2.5P2O5–25.5Na2O–(38.2−x)CaO: xAl2O3 (x between 0 and 3.2) were synthesized, by melt quenching technique and their bioactivity was investigated as a function of Al2O3 concentration. Initially, optical absorption and infrared spectra were recorded and analyzed in order to have some pre-understanding over structural aspects of the glasses. For understanding the bioactivity, the samples were immersed in simulated body fluid (SBF) solution for prolonged times (∼30 days) and the weight loss measurements were carried out. The spectroscopic studies were repeated on the post immersed samples. From the comparison of the analysis of the spectroscopic data of both pre-immersed and post-immersed samples together with the information on variation of pH value of residual solution as a function of immersion time, it is concluded that the participation of aluminium ions in tetrahedral positions is hindrance for the formation of HA layer and for the bioactivity of the samples.