Title
A quantitative study of the calcination and sintering of nanocrystalline titanium dioxide and its flexural strength properties
Abbreviated Journal Title
Mater. Chem. Phys.
Keywords
titanium dioxide; nanomaterials; nanoceramics; biaxial flexural; strength; pressure-less sintering; CERAMIC MATERIALS; TIO2; NANOPARTICLES; REFINEMENT; ZIRCONIA; SCIENCE; ROUTE; Materials Science, Multidisciplinary
Abstract
We performed a quantitative study of the calcination and sintering of nanocrystalline titanium dioxide (TiO2) using the Rietveld refinement technique. Previously, we developed a sol-gel technique to synthesize 5-15 nm anatase powder. Here, we performed a quantitative analysis to study the phase evolution during calcination (400 and 800 degrees C) and the crystal structure after sintering (1400 and 1500 degrees C). TiO2 nanopowder was obtained by hydrolyzing titanium tetraisopropoxide in a mixture of isopropanol and deionized water, after calcination at 400 degrees C. Additionally, the powder was cold die compacted and sintered at 1200-1600 degrees C, to study the biaxial flexural strength and microstructure as a function of sintering temperature. Powder X-ray diffraction technique was used for phase analysis. Scanning electron microscopy was used for microstructural analysis. Rietveld refinement, performed using GSAS software, provided accurate quantitative analysis. Grain size and density increased with increasing sintering temperature. Biaxial flexural tests, performed as per ASTM F-394 with some adaptation, demonstrated a maximum strength of 127.6 MPa in specimens sintered at 1500 degrees C. (C) 2008 Elsevier B.V. All rights reserved.
Journal Title
Materials Chemistry and Physics
Volume
109
Issue/Number
2-3
Publication Date
1-1-2008
Document Type
Article
Language
English
First Page
392
Last Page
398
WOS Identifier
ISSN
0254-0584
Recommended Citation
"A quantitative study of the calcination and sintering of nanocrystalline titanium dioxide and its flexural strength properties" (2008). Faculty Bibliography 2000s. 505.
https://stars.library.ucf.edu/facultybib2000/505
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu