Karla Sofía Sánchez-Zambrano

En este trabajo, se estudiaron las fases en el sistema Mg-Ti-O utilizando la formulación 1:1 de MgO:TiO2 mezclando brucita sintética de origen mexicano con micropartículas de TiO2 de alta pureza y con un tratamiento térmico a 1100°C durante 1 h. Debido a sus electrones de valencia, el TiO2 puede contribuir al proceso de sinterización para mejorar la densidad en los productos de MgO. Las materias primas y la formulación se caracterizaron por las técnicas XPS y XRD. Los resultados demuestran la presencia de diferentes estados de oxidación en la titania y la formación de diferentes óxidos en el sistema Mg-Ti-O cuando se mezcla y calcina a 1100°C. A partir de entonces, se estima la formación de vacantes en la red cristalina durante la transformación de brucita hexagonal a magnesia con una estructura cúbica centrada en las caras. Con los resultados, se advierte su comportamiento térmico en base al diagrama de fases MgO-TiO2.

In this work, we studied the phases in a Mg-Ti-O system using a 1:1 formulation of MgO:TiO₂, mixing synthetic brucite of Mexican origin with TiO₂ microparticles of high purity, with a heat treatment at 1100 °C for 1 h. Due to its valence electrons, TiO₂ can contribute to the sintering process to improve density in MgO products. The raw materials and formulation by XPS and X-RD techniques were characterized. The results demonstrate the presence of different oxidation states in titania and the formation of different oxides in the Mg-Ti-O system when mixed and calcined at 1100 °C; additionally, we estimated the formation of vacancies in the crystal lattice during the transformation from hexagonal brucite to magnesia with a cubic structure centered on the faces. Its thermal behavior is indicated by the MgO-TiO₂ phase diagram.

In this paper, the phases in the Mg-Ti-O system using the 1:1 formulation of MgO:TiO2 mixing synthetic brucite of Mexican origin with TiO2 microparticles of high purity and with a heat treatment at 1100°C for 1 h were studied. The raw materials and formulation by XPS and DRX techniques were characterized. The results demonstrate the presence of different oxidation states in titania and the formation of different oxides in the Mg-Ti-O system when mixed and calcined at 1100°C; additionally, the formation of vacancies in the crystal lattice during the transformation from hexagonal brucite to magnesia with a cubic structure centered on the faces is estimated. With the results, its thermal behavior is warned based on the MgO-TiO2 phase diagram.