PL EN


Preferences help
enabled [disable] Abstract
Number of results
Journal
2009 | 7 | 2 | 205-210
Article title

Kinetic studies on leucite precursors

Content
Title variants
Languages of publication
EN
Abstracts
EN
Kinetic studies were performed on two types of leucite precursors. These precursors were prepared using a hydrothermal method at 150°C; the reaction time was 1.5 hours. In order to obtain precursors having different amounts of seed the molarity of KOH was changed. These intermediate products were subsequently calcinated from 5 minutes to 72 hours at temperatures of 850°C, 900°C, 950°C, 1000°C and 1050°C. The crystallinities of the powders were calculated by X-ray diffraction analysis. The crystallization curves for the synthesis of leucite exhibited a typical sigmoidal characteristic. Using different kinetic equations it was found that the Avrami-Eroféev model is the most appropriate to describe the experimental data. Using the Avrami-Eroféev model n reaches an average value of 2.9 which is connected with the three-dimensional growth of nuclei. The calculated activation energy of crystallization of leucite was 385 kJ mol-1 for non-seeded precursors and 246 kJ mol-1 for seeded precursors, respectively. [...]
Keywords
Publisher

Journal
Year
Volume
7
Issue
2
Pages
205-210
Physical description
Dates
published
1 - 6 - 2009
online
9 - 4 - 2009
Contributors
  • Department of Glass and Ceramics, Institute of Chemical Technology, 160 00, Prague, Czech Republic
  • Laboratory of Inorganic Materials, Institute of Inorganic Chemistry of AS CR and ICT, 166 28, Prague, Czech Republic
References
  • [1] V. Ŝatava, A. Kloužková, D. Ležal, M. Kohoutková, Ceram.-Silik. 46 (1), 37 (2002)
  • [2] F. Liebau, Structural Chemistry of Silicates (Springer-Verlag, Berlin, 1985)
  • [3] D.C. Palmer, N.T. Dove, R.M. Ibberson, B.M. Powell, Am. Mineral. 82, 16 (1997) [Crossref]
  • [4] J.R. Kelly, I. Nishimura, S.D. Campbell, J. Prosthet. Dent. 75, 18 (1996) http://dx.doi.org/10.1016/S0022-3913(96)90413-8[Crossref]
  • [5] I.R. Denry, J. Meckert, J. Dent. Res. 77, 1928 (1996)
  • [6] M.A. Rouf, L. Hermansson, R. Carlsson, Trans. J. Br. Ceram. Soc. 77, 36 (1978)
  • [7] T. Sheu, W.J. O’Brien, S.T. Rasmussen, T. Tien, J. Mater. Sci. 29, 125 (1994) http://dx.doi.org/10.1007/BF00356582[Crossref]
  • [8] E.M. Erbe, R.S. Sapieszko, US patent 5622551 (1997)
  • [9] C. Liu, R. Komarneni, J. Am. Ceram. Soc. 77, 3105 (1994) http://dx.doi.org/10.1111/j.1151-2916.1994.tb04556.x[Crossref]
  • [10] Y. Zhang, J. Wu, P. Rao, M. Lü, Mater. Lett. 60, 2819 (2006) http://dx.doi.org/10.1016/j.matlet.2006.01.098[Crossref]
  • [11] M. Novotná, V. Ŝatava, D. Ležal, A. Kloužková, P. Kostka, Solid State Phenomena Vols. 90, 377 (2003) http://dx.doi.org/10.4028/www.scientific.net/SSP.90-91.377[Crossref]
  • [12] M. Novotná, A. Kloužková, J. Maixner, V. Satava, Ceram.-Silik. 49 (4), 252 (2005)
  • [13] M. Kohoutková, A. Kloužková, J. Maixner, M. Mrázová, Ceram.-Silik. 51 (1), 9 (2007)
  • [14] M. Novotná, V. Ŝatava, P. Kostka, D. Ležal, J. Maixner, A. Kloužková, Glass Technol. 45(2), 105 (2004)
  • [15] Y. Zhang, M. Lü, D. D. Chen, J. Q. Wu, Mater. Lett. 61, 2978 (2007) http://dx.doi.org/10.1016/j.matlet.2006.10.057[Crossref]
  • [16] M. Kohoutková, A. Kloužková, P. Kostka, M. Mrázová, J. Non-Cryst. Solids 354, 741 (2008) http://dx.doi.org/10.1016/j.jnoncrysol.2007.07.075[Crossref]
  • [17] L. Lv, F. Su, X. S. Zhao, Microporous Mesoporous Mat. 76, 113 (2004) http://dx.doi.org/10.1016/j.micromeso.2004.08.004[Crossref]
  • [18] W.J. Kim, S.D. Kim, H.S. Jung, D.T. Hayhurst, Microporous Mesoporous Mat. 56, 89 (2002) http://dx.doi.org/10.1016/S1387-1811(02)00459-6[Crossref]
  • [19] H.J. Lee, Z.M. Kim, O.S. Kweon, I.J. Kim, J. of Eur. Ceram. Soc. 27, 581 (2007) http://dx.doi.org/10.1016/j.jeurceramsoc.2006.04.112[Crossref]
  • [20] D. Uzcátegui, G. González, Catal. Today 107–108, 901 (2005) http://dx.doi.org/10.1016/j.cattod.2005.07.041[Crossref]
  • [21] P.N. Joshi, A.N. Kotasthane, V.P. Shiralkar, Zeolites 10, 598 (1990) http://dx.doi.org/10.1016/S0144-2449(05)80319-7[Crossref]
  • [22] R.J. Francis, D. O’Hare, J. Chem. Soc., Dalton Trans. 3133, (1998) [Crossref]
  • [23] J. Pluhař, A. Puŝkár, J. Koutsky, K. Macek, V. Beneŝ, Fyzikální metalurgie a mezní stavy materiálu, (SNTL, Prague, 1987) (in Czech)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-009-0003-5
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.