Sodium Aluminate (NaAlO2) nanophosphor was prepared from analytical grade Nitrate (NaNO3) and Aluminium (Al(NO3)3.9H2O) by solution combustion method at 450° C using honey as a fuel. The sample characterised X-ray diffraction technique (XRD), UV-Visible Photoluminescence (PL). analysis carried out Bruker AXS D8 Advance diffractometer with Cu-Target (Cu/Kα radiation of wavelength λ =1.54060Å). D...

Infrared absorption spectra of the precipitated solids separated from aluminiumhydroxide solutions below the pH of minimum solubility of AI(OH)3 demonstrate the slow ageing of polymeric A1 complexes to gibbsite. On comparison with the spectra of natural gibbsites, shifts in absorption frequency during crystal growth are interpreted in terms of changes in hydrogen bonding as a consequence of dep...

Citric acid added as set retarder significantly contributed to enhancing the setting temperature and to extending the thickening time of a calcium aluminate phosphate (CaP) geothermal cement slurry consisting of calcium aluminate cement (CAC) as the base reactant and sodium polyphosphate (NaP) solution as the acid reactant. The set-retarding activity of citric acid was due to the uptake of Ca2'...

Potentiodynamic and potentiostatic polarization tests in the potential range between open circuit (OCP) − 0.1 V OCP + 4 were carried out aluminate–phosphate electrolytes with an aluminate concentration of 0.2 mol/L varying phosphates contents 0 mol/L. The pH was adjusted 11.5 12.0 due to phosphate optional KOH addition. A high-strength, dual-phase steel, which is relevant for lightweight constr...

During the hydration of cement, tricalcium aluminate (C3A) reacts with gypsum and forms ettringite (AFt). Once all gypsum is consumed, ettringite can further react with remaining C3A and form monosulfate (AFm) at 1–2 days. Normally, at early ages, ettringite all transfers to AFm phase. After several months or years, ettringite can form again if a new source of sulfate becomes available in the p...

In this research, the activity of MnO, produced during steel making in aluminate-rich slags, was investigated. According to thermodynamic equations and mathematical calculation, a series of relations was obtained for evaluation of oxide activity using Masson’s theory. The obtained relations were solved according to Levenberg- Marquardt method and using Matlab software. The results were correlat...

The development of biomaterials capable of driving dental pulp stem cell differentiation into odontoblast-like cells able to secrete reparative dentin is the goal of current conservative dentistry. In the present investigation, a biomembrane (BM) composed of a chitosan/collagen matrix embedded with calcium-aluminate microparticles was tested. The BM was produced by mixing collagen gel with a ch...

Synthesis of mesoporous materials with a bimodal pore size has always been of great importance for size-selective separation process. Especially, ordered mesoporous cubic MCM-48 with its highly interwoven and branched pore structure, is a potential separation material in applications similar to which zeolites are now being used. This material could have specific technological advantages because...

Using a novel experimental procedure in the field of ceramics/materials science that is based on the precise microanalysis (scanning electron microscopy, coupled with wavelength-dispersive spectroscopy) of the phases that are present in equilibrated specimens, the solid-state compatibility relations in the subsystem MgAl2O4–CaAl4O7–CaO– MgO and the melting relationships in the subsystems MgAl2O...