The study of two different methods to obtain strontium barium niobate nanocrystals immersed in a glass matrix has been carried out. Ho2O3-doped SrO–BaO–Nb2O5–B2O3 glasses were fabricated using the melt quenching method. Glass ceramic samples were obtained from the precursor glass by thermal t...

Barium strontium titanate (Ba1-xSrxTiO3, BST) and strontium barium niobate (SrxBa1-xNb2O6, SBN) are important ferroelectric materials with excellent pyroelectric, dielectric properties and faster response time of infrared radiation. SBN/BST composite ceramics with different mole ratios of Nb and...

Electronic structure and thermoelectric properties of strontium barium niobate were investigated by first principles calculations combined with the semi-classical Boltzmann theory. The band structure corresponding to lattice anisotropy shows higher band dispersion along c axis, but the conductiv...

Calcification roasting is a clean way to extract vanadium from the vanadium slag. But the subsequent sulfuric acid leaching brings the impurity of phosphorous into the leach liquor of vanadium and thus inhibits the precipitation of vanadates for vanadium recovery. In this paper, a novel selectiv...

In the field of large-scale electrochemical energy storage, the vanadium redox flow battery possesses many advantageous features. However, its performance is hampered by the low stability of the positive electrolyte at high temperatures, raising the necessity to use stabilizing agents. Phosphori...

Roasting–leaching–precipitation-calcinations is the conventional way for manufacturing vanadium oxide. Due to the mixing of sodium and ammonium salts in the ammonium precipitation process, a large amount of high concentration ammonia-nitrogen wastewater is produced. In this work, a novel prepa...

Vanadium-containing dendritic mesoporous silica nanoparticles (V-DMSNs) were successfully synthesized by the co-assembly and anion-assisted method. The V-DMSNs were applied as catalysts for the oxidative dehydrogenation of propane and non-oxidative dehydrogenation of propane reactions. DMSNs sup...

The zirconium phosphate (ZrP)-supported vanadium catalysts have been prepared by the mechanochemical synthesis, and were characterized in detail using various techniques including XRD, SEM, HRTEM, EDX, NH3-TPD, H2-TPR, pyridine-absorbed FT-IR and solid 31P NMR spectra. XRD, SEM and HRTEM images ...

Sodium and calcification roasting processes are traditional technologies to recover vanadium from vanadium slag. However, these processes are associated with many drawbacks, including high energy consumption, serious environment pollution, and the inability to simultaneously extract associated t...

Pure and F doped vanadium oxide thin films were deposited on microslide glass substrates at 400 °C by spray pyrolysis technique using nitric acid treated ammonium metavanadate (NTA) aqua precursor solutions and ammonium fluoride added NTA precursor solutions respectively. X-ray diffraction stud...

In the present study, 6 wt% Mo was added into high chromium cast iron (HCCI, 16 wt% Cr), and the effects of heat treatment on microstructure and mechanical properties of the base and alloyed HCCI were investigated. A ledeburite matrix and Mo-rich M2C were obtained besides M7C3 in the as-cast all...

High chromium containing vanadium slag is refractory, and therefore cannot be processed efficiently by traditional roasting method. In this study, a low pressure leaching process using NaOH solution to co-extract both vanadium and chromium has been proposed. The effects of NaOH concentration, le...

In this study we investigated the production of soluble iron and chromium sulfate complexes from high carbon ferrochromium alloy (Fe–Cr–HC) for utilization as a tanning agent. The temperature, sulfuric acid concentration, and the reaction time between Fe–Cr–HC and sulfuric acid were selected...

Different film-forming dispersions (FFD) based on κ−, ι− and λ− carrageenans and green tea extract (GTE) have been developed as an innovative strategy to guarantee the food safety of blueberries and raspberries. First, the FFD were characterized (surface tension and viscosity) and the physico...

Gels of kappa carrageenan (κ-car), iota carrageenan (ι-car) and their mixtures at a polysaccharide concentration of C = 10 g/L were prepared by cooling solutions in the presence of different concentrations of KCl or CaCl2. The mobility of carrageenan (Car) chains at 20 °C was determined using...

In this paper, carrageenans having distinct sulfation patterns (κ-, ι-, ι/ν-, θ- and λ-carrageenans), were fully or partially oxidized at C-6 of the β-d-Galp units using 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and trichloroisocyanuric acid (TCCA) in bicarbonate buffer. The modified c...

Large-grain La1–xSrxMnO3 ceramic samples of compositions x = 0.45 and 0.55, representing the ferromagnetic (FM) and A-type antiferromagnetic (AFM) ground states, were produced via classical sintering at 1500 °C of cold-pressed sol-gel prepared single-phase nanoparticles. Using the same precurs...

Software product line engineering has emerged as a prominent software engineering paradigm, as it comprises a set of core assets sharing functionality and quality attributes. Feature modelling is one of the most frequently used techniques for modelling the variability within a software product l...

An algorithm for flexible mapping (FM) from one gesture to multiple semantics in the same situational context is presented for the first time to reduce the cognitive and operating loads of an operator by using gesture commands. First, the foundation of the FM is built with the semantic-oriented ...

In this paper we propose the FM-index of alignment, a compressed index for similar strings with the functionalities of pattern search and random access. For this, we first design a new and improved version of the suffix array of alignment. The FM-index of alignment is an FM-index of this suffix ...