Synthesis and characterization of ZrO2–MgO solid solutions by citrate gel process

✍ Scribed by Hasan Gocmez; Hirotaka Fujimori

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 580 KB
• Volume: 148
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2007.09.056

✦ Synopsis

The zirconia-magnesia (ZrO 2 -x mol% MgO; x = 3-90) solid solutions were prepared by the citrate gel method. The phase identification and crystallite size of the samples were obtained using X-ray diffraction. Raman spectroscopy was performed to distinguish between cubic and tetragonal phases. The metastable tetragonal t -form was determined in MgO-doped ZrO 2 calcined at 800 • C. Samples containing up to 50 mol% MgO were revealed to be monoclinic ZrO 2 solid solution and MgO when calcined at 1000 • C. Moreover, ZrO 2 -x mol% MgO (x = 60-90) solid solutions have metastable tetragonal t with MgO phase at 800 and 1000 • C, whereas no cubic phase was determined at any compositions of zirconia-based solid solutions. The prepared powders were characterized by transmission electron microscopy (TEM) to obtain the size and the morphology of the particles.