α-zirconium phosphate is widely used as a solid acid catalyst or a catalyst support. In this work, layered crystalline α-zirconium phosphates were synthesized via a facile hydrothermal method and applied in the synthesis of solketal from acetalization of glycerol with acetone. It was found tha...

New layered perovskites, MCa2Ta3O10 (M = alkali metal), were synthesized by a solid-state reaction and an ion-exchange reaction. The crystal structures were refined from powder X-ray diffraction (XRD) patterns by Rietveld analysis. These compounds are new members of the Dion–Jacobson series wit...

A new reduced tantalate, Na2Ca2Ta3O10, with layered perovskite structure was synthesized by an intercalation reaction from the parent sodium compound, NaCa2Ta3O10. The crystal structures of these compounds were determined by the Rietveld analysis of powder X-ray diffraction pattern. Although the...

New reduced tantalate, Na2Ca2Ta3O10, and titanate, Na1·0Ca0·95La2Ti3O10, were synthesized by intercalation reaction from the parent Dion–Jacobson and Ruddlesden–Popper type layered perovskite compounds. The crystal structure of the tantalate was determined by the Rietveld analysis of the pow...

A study of the system Rb2OTa2O5 shows the existence of six phases. One phase α (1-1) stable up to 600°C, two phases β1 and β2(2–3) with orthorhombic unit-cells. The phase δ(2–5) is a cubic pyrochlore. The structure of the ζ phase (3–8) with a monoclinic unit-cell is intermediate betwe...

The crystallization of ammonium paratungstate tetrahydrate, ((NH4)10OH2W12O42·4H2O, APT·4H2O) from aqueous ammonium tungstate solutions is a key unit operation in current tungsten powder production. A literature survey showed that ammonium paratungstate hexahydrate (APT·6H2O) can form under c...

In order to prevent the corrosion of steel reinforcements in concrete, sodium monofluorophosphate (MFP) is proposed as a corrosion inhibitor. When directly applied onto the concrete surface, the inhibiting action of MFP depends on the amount of product that reaches the steel. Until now, the only...

Over the past decade, sodium monofluorophosphate (Na-MFP) gained attention as inorganic self-healing agent on Blast Furnace Slag Cement (BFSC) products. Recent experimental studies revealed the recovering effect of Na-MFP on the microstructure of carbonated BFSC pastes with respect to their fros...

The enzymatic degradation of sodium monofluorophosphate by whole saliva in patients with differing oral health status was compared. Ten patients each with good or poor oral health were selected. Assessment of oral health status included indices of the amount of dental plaque, caries experience a...

In the context of the corrosion of steel in reinforced concrete, one possible solution of protection is the use of corrosion inhibitors. The aim of this paper is to present two methods to analyse quantitatively the inorganic inhibitor sodium monofluorophosphate (MFP, no. CAS[10163-15-2]) in conc...

Polystyrene (PS)/sodium monofluorophosphate (MFP) microcapsules were prepared by solvent evaporation method for direct addition into concrete and the effects of wall material content, MFP content, emulsifier and protective colloid on the morphology of microcapsules were discussed. The results sh...

Microcapsules composed of polylactic acid (PLA)/corrosion inhibitor sodium monofluorophosphate (MFP) were prepared by spray drying, and the effects of processing parameters on the morphology and encapsulation efficiency of the microcapsules were investigated. The results showed that low viscous ...

The aim of this study is to investigate the effect of sodium monofluorophosphate (Na-MFP) on frost scaling durability and transport properties of carbonated blast-furnace slag cement (BFSC) mortar. The application of Na-MFP solution as curing solution and also surface treatment compound for BFSC...

The chemical products generated in the reaction between sodium monofluorophosphate and cement paste, simulated by a calcium hydroxide solution, were analysed using X-ray diffraction and transmission electron microscopy with energy dispersive X-ray analysis. Portlandite, apatite, fluorite, calcit...

Low porosity silica microcapsules (SiO2/Sodium monofluorophosphate) were synthesised by a soft-template method in room temperature. Morphology of silica microcapsule can be controled by changing the concentration of TEOS in reinforcement phase in the range of 1%–4%. With the increased concentra...

The decomposition of K3CrO8 in aqueous alkaline solution has been reinvestigated. Over the pH range from 8.0 to 11.2, the rate is first-order each in tetraperoxochromate ion and hydrogen ion concentrations. No evidence was found for any rate effect due to carbonate or phosphate buffer. Inhibitio...

A 18O labelling technique has been used to demonstrate reversible exchange of peroxide groups between H2O2 and the tetraperoxochromate(V) ion. The results also show that this exchange proceeds without scrambling of oxygen atoms, i.e. the intergrity of the exchanging peroxide group is conserved. ...

The dependence of the rate of self-propagating high-temperature decomposition (SHD) on several variable factors may be approximated by a polylinear function. The applicability and predictability of the polylinear expansion of the rate of K3CrO8 SHD as a function of external pressure and activity...

The phenomenon of self-propagating high-temperature decomposition (SHD) is distinguished in the combustion of condensed substances. K3CrO8 is found to follow such a decomposition. The results of an experimental study of this substance are analyzed using the models of exothermal conversion wave p...

The method of estimating effective invariant kinetic characteristics in non-isothermal kinetics is developed, its connection with general methods for describing multiparametric dependencies and improving the unambiguity of inverse problem solution as well as with the main initial non-isothermal ...