作者: Nicolas Hémono , Jean Rocherullé , Marie Le Floch , Bruno Bureau , Patricia Bénard-Rocherullé
DOI: 10.1007/S10853-005-2157-7
关键词: Mineralogy 、 Crystallization 、 Shear modulus 、 Materials science 、 Bulk modulus 、 Devitrification 、 Nucleation 、 Elastic modulus 、 Glass transition 、 Crystal growth 、 Thermodynamics
摘要: The glass forming region in the B2O3-Al2O3-Y2O3 composition diagram has been determined by a melting and quenching procedure at temperatures up to 1800°C. Different physical characteristics (density, coefficient of thermal expansion, transition crystallization peak temperatures) have for 35B2O3-40Al2O3-25Y2O3 (in mol.%). By using predictive model some NMR structural data, different elastic moduli (Young's modulus, bulk shear modulus Poisson's ratio) calculated. devitrification behaviour also studied. Internal is dominant mechanism new (Y, Al)BO3 ternary phase characterized X-ray powder diffraction. temperature time nucleation dependence from DTA experiments as well kinetics (i.e. Avrami exponent activation energy crystal growth).