Influence of Temperature on the Order-Disorder Transition in Gd sub(2) Zr sub(2) O sub(7)
Chemical co-precipitation method was used to prepare Gd sub(2) Zr sub(2) O sub(7) powders. The powders were then heated in air at 1500[degrees]C, 1510[degrees]C, 1525[degrees]C, 1530[degrees]C, 1550[degrees]C, 1575[degrees]C, 1600[degrees]C for 5 h, and 1575[degrees]C, 1600[degrees]C for 10 h, respe...
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Published in | Key Engineering Materials Vol. 697; pp. 386 - 389 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
01.07.2016
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Abstract | Chemical co-precipitation method was used to prepare Gd sub(2) Zr sub(2) O sub(7) powders. The powders were then heated in air at 1500[degrees]C, 1510[degrees]C, 1525[degrees]C, 1530[degrees]C, 1550[degrees]C, 1575[degrees]C, 1600[degrees]C for 5 h, and 1575[degrees]C, 1600[degrees]C for 10 h, respectively. The samples after heat treatment were characterized by X-ray diffraction and Raman spectroscopy. X-ray diffraction patterns reveal that order-disorder transition of Gd sub(2) Zr sub(2) O sub(7) occurs between 1550[degrees]C and 1575[degrees]C. Prior to the transition, the relative intensity of peaks corresponding to the super-lattice of pyrochlores increases with the increasing temperature. On the other hand, Raman spectra give an inconsistent result from the X-ray diffraction data. No appreciable difference can be observed for all the samples though with peaks broadening as temperature increases. The spectra of the samples indicated as fluorite structure in X-ray diffraction patterns appear with six resolvable peaks which is quite different from the spectrum of ideal fluorite structure. |
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AbstractList | Chemical co-precipitation method was used to prepare Gd sub(2) Zr sub(2) O sub(7) powders. The powders were then heated in air at 1500[degrees]C, 1510[degrees]C, 1525[degrees]C, 1530[degrees]C, 1550[degrees]C, 1575[degrees]C, 1600[degrees]C for 5 h, and 1575[degrees]C, 1600[degrees]C for 10 h, respectively. The samples after heat treatment were characterized by X-ray diffraction and Raman spectroscopy. X-ray diffraction patterns reveal that order-disorder transition of Gd sub(2) Zr sub(2) O sub(7) occurs between 1550[degrees]C and 1575[degrees]C. Prior to the transition, the relative intensity of peaks corresponding to the super-lattice of pyrochlores increases with the increasing temperature. On the other hand, Raman spectra give an inconsistent result from the X-ray diffraction data. No appreciable difference can be observed for all the samples though with peaks broadening as temperature increases. The spectra of the samples indicated as fluorite structure in X-ray diffraction patterns appear with six resolvable peaks which is quite different from the spectrum of ideal fluorite structure. |
Author | Wang, Qun Shi, Jing Lin Qu, Zhi Xue |
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Snippet | Chemical co-precipitation method was used to prepare Gd sub(2) Zr sub(2) O sub(7) powders. The powders were then heated in air at 1500[degrees]C,... |
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SubjectTerms | Coprecipitation Diffraction Diffraction patterns Fluorite Order disorder Pyrochlores Spectra X-rays |
Title | Influence of Temperature on the Order-Disorder Transition in Gd sub(2) Zr sub(2) O sub(7) |
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