Textural stability of yttria-doped titania membranes

• Published in: Journal of materials science Vol. 38; no. 5; pp. 973 - 977
• Main Authors: WONG, Yu-Ting, WONG, Ning-Bew, LI SHI
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.03.2003; Springer Nature B.V
• Subjects: Anatase; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Materials science; Membranes; Phase transitions; Raman spectroscopy; Rutile; Scanning electron microscopy; Sol-gel processes; Thermal analysis; Thermal stability; X-ray diffraction; Yttrium oxide; Scanning electron microscopy; Binary compound; Stability; Transition metal Compounds; Doping; Differential thermal analysis; X ray diffraction; Titanium Oxides; Yttrium Oxides; Sol gel process; Raman spectrometry; Inorganic membrane; Modified material
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1022329309774

The textural stability of yttria-doped titania membranes prepared by the sol-gel method was studied using thermal analysis, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and N2 physisorption techniques. In the membrane fabrication process, the hydrolysis time and geometry of the substituent group in the metal alkoxide precursor directly affected the particle size of the sol. An improvement in thermal stability was achieved in the 3 mol% yttria-doped titania membranes resulting in the retardation of the anatase-to-rutile phase transformation in the doped samples. This technology has potential application in preventing membrane cracking at high temperatures. XRD results revealed that pure and yttria-doped titanias transformed to more than 90% of rutile at temperatures higher than 600 and 800°C, respectively.