Iranian Journal of Materials Science and Engineering

Significant changes in band gap of gamma alumina by sulfate precursor concentration control
Finding the optical band gap by using diffuse reflectance spectroscopy and mathematical calculations
The highest and lowest band gaps obtained as 3.4 eV and 5.65 eV for 1A6 and 3A8

1) Confined/unconfined crystallizations of P3HT/carbonic materials were investigated in DSC-crystallized nanostructures and solution-grown supramolecules.
2) Absorbance, structure details, fusion enthalpy and crystallinity were focused in two different crystallization environments.
3) The best results were recorded for CNT-g-PDDT/P3HT stem-leaf and rGO-g-PDDT/P3HT coarse-patched supramolecules.

A cost effective slow-release urea fertilizer based on an Iranian kaolin and gibbsite was fabricated.
By calcination at 600°C, the specific surface area of granules increased from 7.50 to 53.45m²/g.
By utilizing the loaded granules, the urea consumption can be reduced by 50%.

1. А new type of porogen that is partially gasified while  forming bulk porous polymers had been proposed
2. It is shown that the NaHCO3 porogen affords permeable porous structures with porosities down to 50%
3. The use of the NaHCO3 porogen has allowed  a more than three times enhancement of the permeability of the porous structures as compared with the use of the  NaCl porogen.

1. By using the pure source of Al and Si, the coating exhibited enhanced cyclic oxidation resistance when compared to the alloyed source of Al and Si.
2. The coating thickness of the sample in the case of using NH₄Cl as an activator was more than that of one prepared by AlCl₃ as an activator.
3. Si increases the stability range of Al₂O₃ and improves the adhesion of the oxide layer.