Synthesis and Characterization of ZrO2-CaSO4 Materials Prepared by the Sol–Gel Method |
| |
| Authors: | J. Garcia T. Lopez R. Gomez D. H. Aguilar P. Quintana |
| |
| Affiliation: | (1) Department of Chemistry, Universidad Autonoma Metropolitana-Iztapalapa, A.P. 55-534, 09349 Mexico, D.F., Mexico;(2) Instituto Mexicano del Petróleo, Programas de Crudo Maya e Ingeniería Molecular, Eje Central Lazaro Cardenas 152, México, 07730, D.F., Mexico;(3) Department of Chemistry, Universidad Autonoma Metropolitana-Iztapalapa, A.P. 55-534, 09349 Mexico, D.F., Mexico;(4) Department of Chemistry, Universidad Autonoma Metropolitana-Iztapalapa, A.P. 55-534, 09349 Mexico, D.F., Mexico;(5) Instituto Mexicano del Petróleo, Programas de Crudo Maya e Ingeniería Molecular, Eje Central Lazaro Cardenas 152, México, 07730, D.F., Mexico;(6) Department of Applied Physics, Cinvestav-IPN, Unidad Merida, Ant. Carret. a Progreso Km 6, Cordemex, 97310 Merida, Yucatan, Mexico |
| |
| Abstract: | Mixtures of ZrO2-CaSO4 in different molar ratio were prepared by the sol–gel method. The precursors were anhydrous calcium sulfate (CaSO4) and zirconium n-butoxide in ethanol. Sulfuric acid was used as a hydrolysis catalyst to carry out the reaction at pH 3. The samples were thermally annealed and characterized by X-ray powder diffraction (XRD). Crystalline structure for selected samples (100, 90, 80% molar ZrO2), were refined by the Rietveld method. Tetragonal zirconia and anhydrite were obtained in all compositions ranges, from 400 up to 800°C, although baddeyelite appears in the zirconia rich end (98% molar) from 600°C. Towards high calcium content, different nanostructured calcium sulfates as gypsum, bassanite and anhydrite were obtained. |
| |
| Keywords: | nanostructured tetragonal zirconia zirconia-calcium sulfate phase diagram sol– gel zirconia Rietveld of zirconia-calcium sulfate nanomaterials X-ray diffraction of zirconia-calcium sulfate nanomaterials |
| 本文献已被 SpringerLink 等数据库收录！ |
|
