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The Powder Preparation of Blue Cobalt Aluminate at 210 °C Using the Malonate Method

  • 발행 : 2010.01.20

초록

A powder, containing 80 percent of blue cobalt aluminate $(CoAl_2O_4)$ crystallites, was synthesized at $210 ^{\circ}C$ using a (metal nitrate-malonic acid-ammonium hydroxide-ammonium nitrate) system. The optimal amount of concentrated ammonia water and initial decomposition temperature were determined for the blue $CoAl_2O_4$ crystallites preparation. Three $CoAl_2O_4$ precursor pastes, corresponding to the various amounts of concentrated ammonia water, were prepared by evaporating the initial solutions in an electric furnace fixed at $80 ^{\circ}C$ under a vacuum of 25 torr. The initial solution was used to dissolve the starting materials. The powder with the maximum content (80%) of blue $CoAl_2O_4$ crystallites was prepared when the prepared precursor was decomposed at $210 ^{\circ}C$. The blue $CoAl_2O_4$ crystallite content in the prepared sample decreased with increasing initial decomposition temperature. For 0.2 mole of the $Al^{3+}$ ion, the chemical compositions of the precursor corresponded to molar ratios of 0.4, 1.40, 2.56 and 2.00 for the $Co^{2+}$ ion, malonic acid, ammonia and ammonium nitrate per mole of the $Al^{3+}$ ion, respectively. The blue $CoAl_2O_4$ crystallite content in the sample decreased with the amount of ammonia deviated from the optimal value. The characteristics of the powders were examined using X-ray diffraction, optical microscopy, Fourier transformation infrared spectroscopy and the Brunauer-Emmett-Teller technique.

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참고문헌

  1. Liotta, L. F.; Pantaleo, G.; Di Carlo, G.; Marci, G.; Deganello, G. Appl. Catal. B 2004, 52, 1. https://doi.org/10.1016/j.apcatb.2004.03.003
  2. Ji, L.; Tang, S.; Zeng, H. C.; Lin, J.; Tan, K. L. Appl. Catal. A 2001, 207, 247. https://doi.org/10.1016/S0926-860X(00)00659-1
  3. Vijaya, J. J.; Kennedy, L. J.; Sekaran, G.; Jeyaraj, B.; Nagaraja, K. S. Sensors and Actuators B 2007, 123, 211. https://doi.org/10.1016/j.snb.2006.08.011
  4. Melo, D. M. A.; Cunha, J. D.; Fernandes, J. D. G.; Bernardi, M. I.; Melo, M. A. F.; Martinelli, A. E. Mater. Res. Bull. 2003, 38, 1559. https://doi.org/10.1016/S0025-5408(03)00136-3
  5. Bolt, P. H.; Habraken, F. H. P. M.; Geust, J. W. J. Solid State Chem. 1998, 135, 59. https://doi.org/10.1006/jssc.1997.7590
  6. Zayat, M.; Levy, D. Chem. Mater. 2000, 12, 2763. https://doi.org/10.1021/cm001061z
  7. Cho, W. S.; Kakihana, M. J. Alloys and Compounds 1999, 287, 87. https://doi.org/10.1016/S0925-8388(99)00059-6
  8. Ouahdi, N.; Guillemet, S.; Demai, J. J.; Durand, B.; Er Rakho, L.; Moussa, R.; Samdi, A. Mater. Lett. 2005, 59, 334. https://doi.org/10.1016/j.matlet.2004.10.013
  9. Wang, C.; Bai, X.; Liu, S.; Liu, L. J. Mater. Sci. 2004, 39, 6191. https://doi.org/10.1023/B:JMSC.0000043586.66653.de
  10. Ianos, R.; Lazau, I.; Pacurariu, C.; Barvinschi, P. Mater. Res. Bull. 2008, 43, 3408. https://doi.org/10.1016/j.materresbull.2008.02.003
  11. Neumann, B.; Steinbock, O.; Muller, S. C.; Dalal, N. S. J. Phys. Chem. 1997, 101, 2743. https://doi.org/10.1021/jp964009s
  12. Rao, I.; Binyahia, A. R.; Sharma, P. D. Oxidation Commun. 1998, 21, 55.
  13. Rao, I.; Binyahia, A. R.; Sharma, P. D. Oxidation Commun. 1998, 21, 55.
  14. Navrotsky, A.; Wechsler, B. A.; Geisinger, K.; Seifert, F. J. Am. Ceram. Soc. 1985, 69, 418.
  15. Tsukada,T.; Segawa, H.; Yasumori, A.; Okada, K. J. Mater. Chem. 1999, 9, 549. https://doi.org/10.1039/a806728g
  16. Li, W.; Li, J.; Guo, J. J. Euro. Ceram. Soc. 2003, 23, 2289. https://doi.org/10.1016/S0955-2219(03)00081-5
  17. Wang, J.; Wang, Y.; Qiao, M.; Xie, S.; Fan, K. Mater. Lett. 2007, 61, 5074. https://doi.org/10.1016/j.matlet.2004.07.068

피인용 문헌

  1. O System vol.33, pp.4, 2012, https://doi.org/10.5012/bkcs.2012.33.4.1141
  2. ChemInform Abstract: The Powder Preparation of Blue Cobalt Aluminate at 210 °C Using the Malonate Method. vol.41, pp.16, 2010, https://doi.org/10.1002/chin.201016020