The vaporization of pure yellow PbO(c) to provide reference data for lead titanate and other lead oxide containing compounds was investigated at temperatures of 810–1040 K. Thermodynamic quantities of sublimation and reaction enthalpies, and entropy were derived from the partial pressures of ga...

The development of efficient and stable photoelectrodes keeps on being critical in the implementation of practical water splitting devices. Sol-gel synthesized tungsten trioxide thin film electrodes modified with ytterbium have been prepared on conducting glass substrates. All the obtained elect...

This study aims to investigate pyrometallurgical reduction behavior of tungsten trioxide by ethanol at the temperature range 900–1500 K. Thermodynamic analysis predicted single tungsten phase formation from tungsten trioxide and ethanol at the temperature range studied. The experiments were car...

The effect of vanadium additions on the oxidation behaviour of tungsten has been evaluated at 600 °C in dry air. Mass gain in V-containing tungsten alloys is practically the same than that of pure tungsten processed by a conventional route. The advantage of vanadium alloying arises from the sup...

The oxidation roasting process of molybdenum concentrate has significant advantages in industrial applications. However, utilization of low-grade mineral has many problems because it is more complex than the standard concentrate. In this study, the oxidation behaviors of powdery rhenium-bearing ...

Many tropical soils include sesquioxides, which influence the stability of soil organic matter (OM) and aggregation to an extent that is not fully characterized. The present study was carried out on a range of 18 topsoil samples (0–10 cm) from low-activity clay (LAC) soils from sub-Saharan Afri...

Raman spectroscopy was used to study the variation in vibrational spectra of a series of rare earth sesquioxides of composition Ln2O3 (where Ln = Y, Sm, Eu, Gd, Dy, Ho, Er and Yb) which were also characterized using X-ray diffraction (XRD), and Atomic Force Microscopy (AFM). The vibrational spec...

The emission characteristics of Nd3+ ions in PbO–PbF2–B2O3–M2O3 (M=Y, Sc, Al) glasses were studied as a function of M2O3 concentration. The IR spectral investigations have indicated that the network of the glass mixed with Y2O3 is more depolymerized when compared with other two sesquioxides. ...

Yb3 + ions doped lead oxyfluoro borate glasses mixed with varying concentrations of three interesting sesquioxides (viz., M2O3 = Al2O3, Sc2O3, Y2O3) were synthesized. The emission spectra of each series of glasses were recorded and characterized as a function of concentration of sesquioxides. Th...

The glasses of the composition 37PbO–8Al2O3/ Sc2O3/ Y2O3−54SiO2: 1Ho2O3 (Holimium series), 37PbO–8Al2O3/ Sc2O3/ Y2O3−54SiO2: 1Er2O3 (Erbium series) and 37PbO–8Al2O3/ Sc2O3/ Y2O3−54SiO2: 0.5Ho2O3+0.5 Er2O3 (codoped series) have been synthesized. Optical absorption and fluorescence spectra in t...

Pr3+ doped lead oxy fluoro borate glasses mixed with three sesquioxides (M2O3) viz. Y2O3, Sc2O3, Al2O3 of different concentrations (0–10 mol%) have been synthesized. The preliminary understanding over the structural modifications due to the insertion of the sesquioxides in the glass network cou...

A comparative analysis of the low temperature energy level structure of Sm3+ ion in YAG and sesquioxide (Y2O3, Lu2O3, Sc2O3) microcrystalline ceramics, based on new and previously reported data is presented. The Stark level structure of Sm3+ ion is discussed in terms of nephelauxetic and crystal...

During crystal growth in heat exchanger method (HEM) system, the shape of the growth interface changes with the proceeding of the growth process, which limits the crystal size and reduces the quality of the crystal. In this paper, a modified HEM system is proposed to control the interface shape ...

The research on new functional layer materials and optimization of fabrication in organic light-emitting diode (OLED) has been continuously concerned. In this work, phosphotungstic acid solution used as a precursor is spin-coated onto ITO anode, and then a phosphorus-tungsten oxide (WO3-P2O5) fi...

SummaryObjectivesThe aim of this study was to determine the constitution of a commercially available root-end filling material, mineral trioxide aggregate, (MTA) (ProRoot MTA, Tulsa Dental, Tulsa, OK, USA). The surface morphology of the material with various treatment conditions was also evaluated.

IntroductionOne of the disadvantages of mineral trioxide aggregate (MTA) is washout (ie, the tendency of freshly prepared cement paste to disintegrate upon early contact with physiological fluids). A novel MTA (MTA Plus; Prevest Denpro, Jammu City, India) exhibits low washout and superior physic...

Silicon tetrahalides, SiX4 (X=F, Cl, Br) and the fluorosilicates of sodium and potassium react with phosphorus pentoxide above 300°C. The tetrahalides give rise to the corresponding phosphoryl halides and silica, while the fluorosilicates form the corresponding metal fluorophosphates and silico...

Injuries to immature permanent teeth due to trauma may eventually result in pulpal necrosis and the subsequent arrest of root development. These teeth are often difficult to treat as the associated open root apex hinders the placement of the root filling material. To overcome this drawback, vari...

Black phosphorus (BP) has distinctive properties of tunable direct band gap as a semiconductor material, and both high carrier mobility and on/off switching performance for electronic devices, but has a significant drawback of material degradation in ambient atmosphere. Also, unlike graphene or ...

IntroductionThis study aimed to analyze the chemical-physical properties, including pH, volumetric change, radiopacity, and apatite-forming ability in simulated body fluid, of a new tricalcium silicate material (MTA Flow; Ultradent Products Inc, South Jordan, UT).