| Influence of the Fe2O3 method of incorporation into the brucite (Mg(OH)2): a new processing route to obtain dense MgO-Fe2O3 ceramic composites |
M. Hernández-Reséndiz1, L. V. García-Quiñonez2, D. Fernández-González3, C. Gómez-Rodríguez4
, G. A. Castillo-Rodríguez1 |
1Facultad de Ingeniería Mecánica y Eléctrica (FIME), Universidad Autónoma de Nuevo León (UANL), 66450, San Nicolás de los Garza, Mexico
2Centro de Investigación en Recursos Energéticos y Sustentables (CIRES), Universidad Veracruzana, Av. Universidad Veracruzana Km 7.5, Col. Santa Isabel I, 96538, Coatzacoalcos, Veracruz, Mexico
3Centro de Investigación en Nanomateriales y Nanotecnología (CINN), Avda. de la Vega, 4-6, 33940, El Entrego, Spain
4Departamento de Mecánica, Facultad de Ingeniería, Universidad Veracruzana, Campus Coatzacoalcos, Av. Universidad Km 7.5 Col. Santa Isabel, Coatzacoalcos, 96535, Veracruz, Mexico |
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Received: November 17, 2024; Revised: February 26, 2025 Accepted: March 16, 2025. Published online: April 10, 2025. |
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| ABSTRACT |
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The effect of adding microparticles of cations with oxidation state 3 + in doubly calcined brucite (Mg(OH)2) was studied to obtain dense MgO-Fe2O3 composites. Powders, consisting of brucite and Fe2O3 microparticles (with 1, 3, and 5 wt%), were mechanically mixed. Subsequently, the mixtures were calcined at 960 °C for 4 h. Afterward, green compacts were obtained by pressing and, then, sintering was conducted at 1600 °C for 4 h. Physical, chemical, and mechanical properties were determined in sintered samples. In addition, the morphology and microstructure were studied by SEM and XRD. The results revealed that the sample containing 5 wt% Fe2O3 exhibited a densified morphology with low porosity, as well as high cold crushing strength. This new processing route, considering brucite, as the starting material might be a potential candidate, due to the early ionic activation between cations of hematite to brucite, for obtaining dense MgO-Fe2O3 ceramic composites. |
| Key words:
Mg(OH)2 brucite · Caustic MgO · Fe2O3 · Calcination · Sintering |
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