To reduce the wear related damage of medical grade Ti-6Al-4V alloy, laser engineered net shaping (LENS™) based in situ reactive multi-material additive manufacturing was employed to process a mixed coating of Ti-6Al-4V powder and calcium phosphate (CaP) in an oxygen free, nitrogen-argon environm...

Thermochemical heat storage is a promising candidate due to its high energy densities and the possibility of long-term storage in the areas of waste heat recovery and renewable energy utilization. In this work, hexagonal boron nitride (HBN)-doped calcium hydroxide has been prepared by ultrasonic...

Two types of calcium sulfoaluminate cement containing 20% and 30% phosphogypsum, respectively, were investigated for their ability in hazardous waste stabilization. Fourteen series of pastes were prepared, each containing the following soluble salt: Na2CrO4·4H2O; Na2Cr2O7·2H2O; CrCl3·6H2O; Pb...

There are conflicting reports regarding the melting point of Ca2PbO4 in the literature. By performing differential thermal analysis under various atmospheres, we found that the melting point of Ca2PbO4 is severely depressed due to the reduced partial pressure of oxygen. At an oxygen partial pres...

Impurities in electrodeposited thin films of CdTe were identified from secondary ion mass spectroscopy (SIMS) data obtained with a Perkin-Elmer PHI Model 2500, a Cameca IMS 3F and a Cameca IMS 4F operated with the primary ions Ar+, O- and Cs+ respectively. The sources of the impurities were soug...

Although gold tellurides are important sources of gold in several areas in the world, little attention has been paid to understanding how they might be processed. This paper describes an electrochemical study of the oxidation of one gold telluride, namely calaverite (AuTe2) in acid solution. The...

A chemical route for the low-temperature synthesis of the calcium stannates CaSnO3 and Ca2SnO4, potential materials for dielectric applications, is reported. Mixed cation precursor powders, derived using calcium chloride, tin tetrachloride and hydrogen peroxide, were calcined at relatively low t...

Sodium stannate (Na2SnO3·3H2O) has been widely applied in the field of electroplating and flame retardants preparation. In general, Na2SnO3·3H2O is mainly prepared from cassiterite or metallic tin, which has the problems of high production costs and natural mineral shortage. This study investi...

A series of Pr3+-doped CaSnO3, SrSnO3 and Ca2SnO4 samples were prepared by a conventional high temperature solid-state reaction route. All samples were characterized by powder X-ray diffraction (XRD) analysis, photoluminescence (PL), photoluminescence thermal quenching (TQ) and fluorescence life...

Calcium stannates (Ca2SnO4), which has an inverse spinel structure, was adopted as the host material of emitting phosphor. Eu2O3–doped Ca2SnO4 (Ca2SnO4:xEu, 0.00-0.08) were prepared by solid-states reaction at 1350 °C under atmospheric air with constant dwell time of 6 The Rietveld analysis of...

In the present study, a causticization method combined with alkaline leaching and purification process was used to treat with lead refining slag. In the alkaline leaching process, the effects of alkaline concentration, temperature, liquid to solid ratio, leaching time, and agitating speed were i...

Calcium stannate (Ca2SnO4) is a common dielectric ceramic that is generally prepared by a high-temperature solid-state method in an air atmosphere with a roasting temperature of more than 1300 °C. In this study, Ca2SnO4 was much more easily synthesized in a CO-CO2 atmosphere at a relatively low...

A series of Mo-Mg-O catalysts with different crystalline phases (pure and mixtures) have been studied in the oxidative dehydrogenation of isobutane. X-ray diffraction, UV–Vis spectroscopy and temperature programmed reduction were applied to characterise the samples. In addition, the kinetics of...

This study evaluated the corrosion resistance of AZ91D magnesium alloy coated by composite coatings which consisted of a molybdate conversion coating and three layers of silicon sol–gel coatings. For molybdate conversion treatment, various conditions including the pH of the molybdate baths, imm...

Zinc molybdate (ZM) is a safer anticorrosive additive for cooling systems when compared with chromates and lead salts, due to its insolubility in aqueous media. For most molybdate pigments, their molybdate anion (MoO4-2) acts as an anionic inhibitor and its passivation capacity is comparable wit...

In this paper, a new conversion coating—molybdate/phosphate (Mo/P) coating on magnesium alloy was prepared and investigated by electrochemical impedance spectra (EIS), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and salt-water immersion ex...

Plasma electrolytic oxidation (PEO) process is a recently developed electrochemical method used to produce on the surface of various metals oxide ceramic coatings that improve corrosion and wear properties of the substrate. In this work, PEO process was applied on AZ91 magnesium alloy using low ...

We report the formation of a protective film on magnesium alloy AZ91D by means of anodisation under potentiostatic conditions in a molybdate solution. Results of the characterisation of the films by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy ...

Magnesium zinc molybdate nanoparticles which has been synthesised by conventional method, used as core of nanocontainer. In the present work, a novel approach for the loading and responsive release of corrosion inhibitor (benzotriazole) on the magnesium zinc molybdate nanocontainer by layer by l...

Dehydrogenation of paraffins is an industrially practiced technique for the production of value added olefins. Molybdenum based catalysts are known for this application. This study focuses on the application of magnesium molybdate based catalysts with different Mg:Mo ratios for the dehydrogenati...