Abstract
The effects of Li2O/(Li2O + Na2O) ratio and temperature on structure, crystallization, microstructure and mechanical properties of SiO2-CaO-Al2O3-TiO2-9 mol% R2O glass ceramics were investigated by melting-sintering method. It was concluded that as substituting Li2O for Na2O, the degree of polymerization of glass first increased and then decreased by Raman spectra analysis. The activation energy of crystallization was in the range of 165–193 kJ/mol, and the crystallization behavior was dominated by bulk crystallization. When the glass samples were heat treated at 750 ℃, only glass containing 9 mol% Li2O crystallized, and the crystalline phases were β-quartz solid solution and wollastonite phases; while when heat treatment temperature increased to 800 ℃ or 850 ℃, the main crystal phase changed from granular wollastonite to fine-grained β-spodumene phase as replacing Na2O by Li2O. In addition, both the flexural strength and Vickers hardness first increased and then decreased with the increase of Li2O/(Li2O + Na2O) ratio.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
