Journal of the American Ceramic Society · 2006 · 15 citations · 20 references
EngineeringMaterials EngineeringMaterials ScienceCeramicsMaterials CharacterizationSurface ScienceMembrane CharacterizationMembrane EngineeringMembrane FabricationMembrane MaterialsPerovskite MaterialsPorous CeramicsAdsorption IsothermsAlumina MembranesCeramic Membrane FabricationFractal DimensionNanostructured MembranesPore-size DistributionShrinkageSol-gel Membrane Synthesis
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.
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