| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Thermal Decomposition Process and Phase Transformation Behavior of Zirconia Nanopowders Prepared by Polyacrylamide Gel Route |
| LIU Ting1, CHEN Weidong1,2, JU Hongmin1, YAN Shufang1, ZHANG Yuxin1, MA Wen1,2
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1 School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051;
2 Inner Mongolia Key Laboratory of Thin Film and Coatings, Hohhot 010051 |
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Abstract For the sake of obtaining zirconia nanopowders with high phase purity, fine particles and narrow particle size distribution, polyacrylamide gel route was employed to prepare zirconia nanopowders, taking zirconium oxychloride as precursor. Moreover, the thermal decomposition process of zirconia xerogel, phase compositions, morphologies and particle sizes of zirconia nanopowders were characterized by thermogravimetric analysis (TG), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The thermal decomposition of zirconia gel and phase transformation behavior of zirconia nanopowders via po-lyacrylamide technique were analyzed in detail. The results demonstrated that the thermal decomposition of zirconia gel went step by step, and its complete thermo-decomposing temperature was 577 ℃. With the increase of calcination temperature, zirconia gel showed an increase in crystallinity, which transformed from amorphous to tetragonal, and completely converted to monoclinic zirconia at 900 ℃. The particle sizes of zirconia nanopowders increased with the rising calcination temperature. Nearly spherical zirconia nanopowders with the particle size of 50—200 nm can be achieved under the calcination temperature range of 700—1 000 ℃. In the present work, the thermal decomposition of zirconia xerogel and the effect of calcination temperature on zirconia nanopowders were systematically studied, which theoretical guidance for the preparation of zirconia nanopowders by polyacrylamide gel route.
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Published: 19 June 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51164023, 51364026),Natural Science Foundation of Inner Mongolia Autonomous Region (2016MS0505), Science and Technology Major Project of Inner Mongolia Autonomous Region (2018-810). |
| About author:: Ting Liu is a master degree candidate of school of Materials Science and Engineering, Inner Mongolia University of Technology, Inner Mongolia, China. Her research focuses on the zirconia functional materials.Weidong Chen is a professor and doctoral supervisor of School of Materials Science and Engineering at Inner Mongolia University of Technology. He received his B.E. degree in materials science and engineering and M.E. degree in materials processing engineering from the Inner Mongolia University of Technology in 1997—2005. Subsequently, he obtained his Ph.D. degree under the supervision of Prof. Lijun Wang in nonferrous metallurgy from the General Research Institute for Nonferrous Metals, China in 2008. His research interests include the development of zirconia functional materials, zirconium and hafnium metallurgy, surface protection technology and comprehensive utilization of mineral resources. |
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2019, Vol. 33 
