| Full text | |
| Author(s): |
Pena, R. B.
[1, 2]
;
Sampaio, D. V.
[1, 2, 3]
;
Lancelotti, R. F.
[4, 2]
;
Cunha, T. R.
[1, 2]
;
Zanotto, E. D.
[2]
;
Pizani, P. S.
[1, 2]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed Sao Carlos, Phys Dept, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Mat Engn, Ctr Res Technol & Educ Vitreous Mat, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed Alagoas, Phys Inst, BR-57072900 Maceio, AL - Brazil
[4] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Journal of Non-Crystalline Solids; v. 546, OCT 15 2020. |
| Web of Science Citations: | 0 |
| 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 degrees C the crystallization pathway proceeded from the low PbSiO3 to alamosite, whereas at 600 degrees 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. (AU) | |
| FAPESP's process: | 19/12383-8 - Study of structural and vibrational properties of glass and glass-ceramic materials via Raman scattering as a function of temperature and high hydrostatic pressures. |
| Grantee: | Thiago Rodrigues da Cunha |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/15962-0 - Correlation between materials structure and dynamic and optical properties of (Ax, A'1-x)O + SiO2 (A, A' = Pb, Ni, Co, Fe, Cr) series: Raman scattering and molecular dynamics simulations |
| Grantee: | David Vieira Sampaio |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 17/11868-2 - Correlation between structure and optical properties of (Äx, A'1-x)O + SiO2(A,A'= Pb,Ni,Co,Cr) glass ceramic serie under high hydrostatic pressure |
| Grantee: | Rafaella Bartz Pena |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |