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Surface Fractal Dimension of Perovskite‐Doped Alumina Membrane: Influence of Calcining Temperature
Author(s) -
Ahmad A. L.,
Idrus N. F.,
Abd Shukor S. R.
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.00964.x
Subject(s) - fractal dimension , materials science , perovskite (structure) , sintering , calcination , membrane , doping , chemical engineering , mineralogy , fractal , analytical chemistry (journal) , composite material , chemistry , chromatography , mathematics , catalysis , mathematical analysis , biochemistry , optoelectronics , engineering
The surface fractal dimension, D , and pore size distribution of perovskite‐doped alumina membrane prepared via the sol–gel method were determined from their nitrogen adsorption isotherms. The D value was calculated using the Frenkel–Halsey–Hill method. The D value increased with increasing temperature due to membrane shrinkage. The pore size distribution pattern of perovskite‐doped alumina membrane showed a narrow pore size when the temperature was increased from 400° to 800°C. The isotherm type was characterized as Type IV. Smoothing and sintering effects contributed to the decreasing trend of surface fractal dimension at a high temperature. The surface fractal dimension increased when the perovskite ratio in alumina membrane was increased.