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Journal of Inorganic Materials

Journal of Inorganic Materials >

2006 , Vol. 21 >Issue 2: 357 - 362

DOI: https://doi.org/10.3724/SP.J.1077.2006.00357

Research Paper

Solid State Reaction Mechanism of SrO-CeO2 System

  • FU Shi-Liu ,
  • DAI Jun ,
  • DING Qiu-Ke
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  • Department of Physics, Shantou University, Shantou 515063, China

Received date: 2005-01-21

  Revised date: 2005-04-05

  Online published: 2006-03-20

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Abstract

The solid state reaction process of the mixture of SrCO3 and CeO2 powders with different Sr/Ce ratios was studied by using XRD and TG/DTA methods. The results show that only Sr2CeO4 phase is formed for a firing temperature lower than 950℃ while Sr2CeO4 and SrCeO3 phases are simultaneously developed in the initial stages of the reaction for a firing temperature above 950℃. In the initial stages of the reaction above 950℃,the major product is Sr2CeO4 for close to 950℃ and it becomes SrCeO3 above 1000℃. There are two types of formation mechanism for SrCeO3 and Sr2CeO4, respectively. When the firing temperature is above 1000℃, SrCeO3 is formed directly by SrO and CeO2 while Sr2CeO4 is created by SrCeO3 and SrO. However, SrO and CeO2 convert directly to Sr2CeO4 below 950℃ and SrCeO3 is produced by the reaction of Sr2CeO4 and CeO2 for close to 950℃. Based on these results, the reaction mechanism of SrO-CeO2 system is derived and the wrong results in the XRD data of SrCeO3 (JCPDS36-980) have been clarified. The fluorescence spectra of Sr2CeO4 show that the formation mechanism has effect on its excitation spectra.

Key words： formation mechanism; SrCeO3; Sr2CeO4; SrO-CeO2 system

Cite this article

FU Shi-Liu , DAI Jun , DING Qiu-Ke . Solid State Reaction Mechanism of SrO-CeO2 System
[J]. Journal of Inorganic Materials, 2006 , 21(2) : 357 -362 . DOI: 10.3724/SP.J.1077.2006.00357

References

1 Iwahara H, Esaka T, Uchida H, et al. Solid State Inonics, 1981, 3/4: 359--363.
2 Yajima T, Iwahara H. Solid State Ionics, 1992, 50: 281--286.
3 Uchida H, Maeda N, Iwahara H. Solid State Ionics, 1983, 11: 117--124.
4 徐秀廷, 崔德良, 冯守华, 等(XU Xiu-Ting, et al). 高等学校化学学报(Chem. J. Chinese Universities), 1996, 17 (10): 1519--521.
5 许志弘, 温廷琏(XU Zhi-Hong, et al). 无机材料学报(Journal of Inorganic Materials), 1994, 9 (1): 122--128.
6 Danielson E, Devenney M, Giaquinta D M, et al. Science, 1998, 279 (6): 837--839.
7 Danielson E, Devenney M, Giaquinta D M, et al. J. Mol. Struct., 1998, 470: 229--235.
8 Jiang Y D, Zhang F, Summers C J, et al. Appl. Phys. Lett., 1999, 74 (12): 1677--1679.
9 Serra O A, Severino V P, Galefi P S, et al. J. Alloys. Comp., 2001, 323: 667--669.
10 娄天军, 陈森林, 陈立妙, 等(LOU Tian-Jun, et al). 无机化学学报(Chin. J. Inorg. Chem.), 2005, 21 (2): 298--300.
11 Tang Y X, Guo H P, Qin Q Z. Solid State Commun., 2002, 121: 351--356.
12 符史流, 戴军, 周甫方(FU Shi-Liu, et al).
无机化学学报(Chin. J. Inorg. Chem.), 2004, 20 (6): 698--702.13 Longo V, et al. J. Mater. Sci., 1981, 16 (3): 503--507.
14 Park C H, Kim C H, Pyun C H, et al. J. Luminescence, 2000, 87-89: 1062--1064.

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