Abstract
We examined the influence of barium oxide addition on the structure and properties of SiO2–Al2O3–Na2O–K2O–MgO glass–ceramics. Glass–ceramics were prepared with constant SiO2/Al2O3 and Na2O/K2O ratios of 6.5 and 1.04, respectively, and the MgO content was maintained at 10.56wt%. The barium oxide content was set at 4wt%, 9wt%, and 14wt%. The weight ratios were recalculated from the BaCO3 added. To determine the microstructure of the glassy materials, scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS), X-ray diffraction (XRD), medium (MIR) and far infrared analysis (FIR), and Raman spectroscopy were used. Significant differences were observed in the phase composition and in the silica–alumina-oxide network of the glassy phase, which could be related to changes in the amount of barium oxide. The characteristic temperatures (beginning of sintering, sphere, half-sphere and melting), which were measured by using hot stage microscopy and dilatometry, also showed changes.
Sign-in/Register to access full text options 
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.
