Abstract
The formation of metastable phases is a relevant, challenging and yet underexplored subject in glass crystallization. In this work, we examined the isothermal crystallization of PbO.SiO2 lead metasilicate glass by using in-situ Raman spectroscopy. We provide evidence for the evolution process from the glass to alamosite, the stable crystalline phase, which is intermediated by two distinct metastable phases at different temperatures. At 550 °C the crystallization pathway proceeded from the low PbSiO3 to alamosite, whereas at 600 °C the crystalline phase evolved from the hexagonal PbSiO3 to alamosite. We found no interconversion between these two metastable phases, indicating that both can precipitate prior to alamosite stabilization. These findings demystify the alleged complexity of the crystallization process of lead metasilicate glass, raised in the literature, whose data are critically analyzed and discussed herein.
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.
