Author:Archer, M; McCrindle, RI; Rohwer, ERDate:Dec 2003Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to measure the concentrations of cobalt, tantalum, titanium, vanadium and chromium in solutions of tungsten carbide. The main advantage of the method described here ...Read more
Author:Ngulube, T; Gumbo, JR; Masindi, Vhahangwele; Maity, ArjunDate:Oct 2018The ability of calcined magnesite for Methylene Blue (MB), Direct Red 81 (DR81), Methyl Orange (MO) and Crystal Violet (CV) dye removal was evaluated in this study. The experiments were designed to test the hypothesis that alkaline earth ...Read more
Author:Mathe, Ntombizodwa R; Nkosi, SS; Motaung, DE; Scriba, Manfred R; Coville, NJDate:May 2015The electronic, magnetic and electrocatalytic properties of bimetallic thiol-capped Pt/Co and Pt/Ni nanoparticles were synthesised using two reducing agents, NaBH(sub4) and N(sub2)H(sub4). X-ray diffraction analysis of the nanoparticles showed ...Read more
Author:Letcher, TM; Govender, PUDate:Dec 1997The excess molar volumes V-m(E) {x(CH3OH or CH3CH2OH or CH3(CH2)(2)OH or CH3CH(OH)CH3 + (1 - x)(CH3(CH2)(2)}(2)O or CH3C(CH3)(2)OCH3 or CH3CH2C(CH3)(2)OCH3} have been calculated from measured values of density over the whole composition range ...Read more
Author:Nicolaides, CPDate:1999Hydrogels, typically used for the synthesis of highly crystalline ZSM-5 samples at 150 degrees C and under autogenous pressure, were subjected to lower hydrothermal synthesis temperatures, i.e., from 25 degrees C to 130 degrees C. XRD analysis ...Read more
Author:Thackeray, MM; Rossouw, MHDate:Dec 1994The synthesis of lithium-manganese-oxide spinels by reaction of Li2CO3 and MnCO3 in air and under nitrogen to T(max) = 600°C has been investigated by thermogravimetric analysis and differential scanning calorimetry. When the reaction is ...Read more
Author:Prins, SN; Cornish, LA; Stumpf, WE; Sundman, BDate:Mar 2003The CALPHAD technique was used to calculate the Al-Ru binary phase diagram. The RuAl (B2) phase was described with the sublattice model (SL), also designated Compound Energy Formalism (CEF), as well as the Modified Sublattice Formalism (MSL), ...Read more