Preparation and characterization of alpha alumina nanoparticles by in-flight oxidation of flame synthesis

Controllable synthesis of mesoporous alumina with large surface area for high and fast fluoride removal

“…5b indicate that the kinetic data fit well with the pseudo-second-order kinetic model. The value of 11 correlation coefficient R 2 for pseudo-second-order kinetic model is relatively high (more than 0.99), and the adsorption capacity of MA for fluoride calculated by this model is also close to that obtained from experiments (10.3701 mg g -1 ). Compared with pseudo-second-order kinetic model, the predicted equilibrium adsorption capacity (9.8677 mg g -1 ) of the pseudo-first-order kinetic model is slightly lower than the experimental values (10.3701 mg g -1 ), and the value of correlation coefficient R 2 is 0.9766.…”

Deposition and characterization of alpha alumina thin films prepared by chemical bath deposition

“…Due to annealing of the film some unstable gamma phases are also present. The grain size was calculated from x-ray diffraction data by using Scherer formula [11] 0.9 λ D = β cosθ A c c e p t e d M a n u s c r i p t where λ is the wavelength of the X-rays (1.5406Ǻ), β is the FWHM of the peak with highest intensity and θ is the angle of diffraction.…”

Role of CaF2on mechanochemically synthesized leucite as dental veneering glass ceramics

“…This preparation method is simple, economical and also suitable for large scale production of other nanoparticles ceramic system. 25 This process has been successfully utilised to obtain a number of nanomaterials including Al 2 O 3 , 26 ZnO, 27 31 The main idea of the present work is to demonstrate that submicrometre size leucite glass ceramics can be produced at relatively low temperatures using mechanically activated precursors. Two blends in which one containing Al 2 O 3 , SiO 2 and K 2 CO 3 in the stoichiometric ratio of leucite and the other with same stoichiometric ratio with 2 wt-%CaF 2 as additive was prepared.…”