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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis of PbO center dot SiO2 glass by CO2 laser melting method

Full text
Author(s):
Silva, D. C. [1] ; Sampaio, V, D. ; Silva, J. H. L. [1] ; Rodrigues, A. M. [2] ; Pena, R. B. [3] ; Moulton, B. J. A. [3] ; Pizani, P. S. [3] ; Rino, J. P. [3] ; Silva, R. S. [1]
Total Authors: 9
Affiliation:
[1] Univ Fed Sergipe, Dept Fis, Grp Nanomat Funcionais, BR-49100000 Sao Cristovao, SE - Brazil
[2] Univ Fed Sao Carlos, Dept Engn Mat, Caixa Postal 676, BR-13565905 Sao Carlos, SP - Brazil
[3] Sampaio, D., V, Univ Fed Sao Carlos, Dept Fis, Caixa Postal 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 522, OCT 15 2019.
Web of Science Citations: 0
Abstract

Described herein is a new approach to produce glass materials using a CO2 laser as unique heating source. In this study, the well-known PbO center dot SiO2 (PS) system was chosen as a glass model because of its very good glass forming ability and stoichiometric crystallization. The laser-produced glasses presented the same temperature stability as the conventionally produced glass, as observed by DSC results, without the presence of crystalline phases according to XRD and Raman results. Additionally, no structural change was detected among the glasses, when probed by Raman and XANES. After thermal treatment at 730 degrees C for 1 h, the laser-produced glass crystalizes to the alamosite (PbSiO3) phase which confirms the nominal stoichiometry without Pb volatilization. In optimal conditions, the total PS laser-produced glass was synthesized within 3 min., which is remarkably fast in comparison to conventional processes using an electric furnace that can last several hours. (AU)

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: 16/18567-5 - Nuclei entrapment: the pre-nucleation structural ordering of homogeneous nucleating BaO-2SiO2 and CaO-SiO2 glasses
Grantee:Benjamin John Albert Moulton
Support Opportunities: Scholarships in Brazil - Post-Doctoral
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)