Vitrification of a sodium chromate waste and mechanical properties of a final glass-ceramic
The mechanical properties of a new glass-ceramic similar to basalt glass-ceramics have been determined. This new glass-ceramic is similar to those obtained from basalts and it is a resulting material from the vitrification of a highly contaminated sludge rich in hexavalent chromium (Cr). A formulate...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/248267 |
| Acceso en línea: | http://hdl.handle.net/10261/248267 |
| Access Level: | acceso abierto |
| Palabra clave: | Vitrification Glass-ceramics Mechanical properties Weibull analysis Chromate wastes |
| Sumario: | The mechanical properties of a new glass-ceramic similar to basalt glass-ceramics have been determined. This new glass-ceramic is similar to those obtained from basalts and it is a resulting material from the vitrification of a highly contaminated sludge rich in hexavalent chromium (Cr). A formulated mixture between this industrial waste and silica-based additives was achieved within the CaO-MgO-AlO-SiO system. The Cr can be fully reduced to Cr with high chemical and mechanical stability, and the resulting material is stable for the environment. The Weibull modulus of flexural strength was m = 5.7, corresponding to a relatively low value, indicating that the breakage is due to a variable number of types of cracks. In any case, the average flexural strength of this material (258 MPa) can be considered as a relative high value when compared with the values of more traditional glass-ceramics. |
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