Solution calorimetric study of mixing enthalpy in 0.8[xB2O3–(1−x)SiO2]–0.2K2O glasses at 298K

Application of Solution Calorimetry to the Prediction of 20.15[(2.038 + x)SiO<sub>2</sub>-(1.457 － x)Na<sub>2</sub>O]-2.6-P<sub>2</sub>O<sub>5</sub>-26.95CaO Glass Bioactivity

“…As the reaction between the glassy oxides cannot be carried out directly into the calorimeter at ambient temperature due to kinetic limitations, the well-known dissolution method is applied. This indirect method based on a Hess thermodynamic cycle consists in the successive dissolutions in the same solvent and at the same temperature of all the compounds involved in the reaction of formation [12][13][14]. HF calorimetric experiments were performed with a swinging calorimeter.…”

“…HF calorimetric experiments were performed with a swinging calorimeter. The calorimeter and standard procedures have been described previously [14,15] and so only a brief description will be given below. Thermopiles consisting of hundreds of chromel-alumel thermocouples were inserted into an aluminum block isotherm.…”