|
|||||
|
|
Study of crystallization process of soda lead silicate glasses by thermal and spectroscopic methods |
|
| Authors: | Oana Cătălina Mocioiu Maria Zaharescu Irina Atkinson Ana-Maria Mocioiu Petru Budrugeac |
| Affiliation: | 1. “Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independentei Street, 060021, Bucharest, Romania 2. Department of Research and Materials Investigation, National R&D Institute of Textile and Leather, 16 Lucretiu Patrascanu Street, Bucharest, Romania 3. Advanced Research Institute for Electrical Engineering, INCDIE-ICPE-CA, 313 Splaiul Unirii Street, Bucharest, Romania |
| Abstract: | The crystallization process of some glasses in the ternary Na2O–SiO2–PbO system with good chemical stability that can be used for waste inertization was studied using X-ray diffraction (XRD), infrared spectroscopy (FT-IR), differential thermal analysis (DTA) and scanning electron microscopy. The parent glasses were characterized by XRD and FT-IR, and their vitreous state was determined. DTA measurements evidenced glass transition (T g) and crystallization temperatures (T c). The thermal treatments were conducted at vitreous transition temperature (400 °C) and at highest effect of crystallization (650 °C). XRD evidenced the lead and sodium silicate crystalline phases in samples treated at 650 °C for 12 h. Micrometer crystallites dispersed in the glass matrices have affected the transparence of glasses and made them opaque after treatment at 650 °C. The influence of oxide quantities in compositions on the crystallization tendency was revealed. A PbO higher content than that of SiO2 as well as lower Na2O content decreased the tendency of crystallization. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |