Synthesis and characterization of clinopyroxene based glasses and glass-ceramics along diopside (CaMgSi_2O_6)-jadeite (NaAlSi_2O_6) join

摘要

The crystallization behavior and mechanical characterization of glasses based upon the compositions along diopside (CaMgSi_2O_6)-jadeite (NaAlSi_2O_6) join has been investigated. Six glasses were obtained by the melt-quenching technique. Structural and thermal behaviors of these glasses were investigated by density and molar volume, infrared spectroscopy (FTIR) and dilatometry. The crystallization behavior of glasses was investigated by using differential scanning calorimetry (DSC). Sintering and crystallization behavior of the glass-ceramics were investigated under non-isothermal heating conditions up to temperatures of 850 °C. Mechanical characterization of glasses was investigated by using the measurement of Vickers indentation hardness and elastic constants such as Young's modulus (E), shear modulus (G), bulk modulus (K) and Poisson's ratio (v). These data of the glasses were correlated with the structure of glasses, nature and role played by glass forming cations.