Materials Literature
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There was investigated influence of mechanical activation in centrifugal planetary mill (during 9–43 min at relation of balls mass and material B : M = 20 : 1) and subsequent high-speed heating (~ 6 °C/s) on phase formation in the system of chromium–carbon. There was elucidated that incu- bation period of carbide form…
The effect of sintering time on phase, grain size, dielectric, ferroelectric, and piezoelectric properties of 0.5Pb(Ni 1/3 Nb 2/3 )O 3 ‐0.35PbTiO 3 ‐0.15PbZrO 3 thick films has been investigated. The thick films used in this study were fabricated by a double‐doctor‐blade tape‐casting technique. Green tapes were sinter…
Abstract The heterodinuclear complex [(ioan)NiIITiIV] with a facial O3 donor set of TiIV‐coordinated benzyl alcoholates serves as a metallo‐ligand for a {CrIIICl3} fragment to yield the heterotrinuclear complex [(ioan)NiIITiIVCrIIICl3]. Comparisons of their molecular structures and electrochemical properties exhibit s…
Proteins are dynamic systems and interact with their environment. The analysis of crystal contacts in the most accurately determined protein structures (d < 1.5 Å) reveals that in contrast to current views, static disorder and high side-chain entropy are common in the crystal contact area. These observations challenge…
A miniature electron spin resonance (ESR) probehead that includes a static field source and a microwave resonator for in vivo measurement of paramagnetic defects in tooth enamel was developed. These defects are known to be a good marker for quantifying the ionizing radiation dose absorbed in teeth. The probehead has a…
Objective: This was to evaluate the efficacy of MAP in maintaining the postharvest quality of mango fruits.Methodology and results: The fruits were harvested from a commercial orchard, (Karurumo Orchards) located in Embu county of Eastern province. The fruits were harvested at advanced maturity during the pre-climacte…
A double-chamber denitrifying microbial fuel cell (MFC), using boric acid-borate buffer solution as an alternative to phosphate buffer solution, was set up to investigate the influence of buffer solution concentration, temperature and external resistance on electricity generation and pollutant removal efficiency. The…
CdS is one of the important II-VI group semiconductors. In this paper, the electrical transport behavior of an individual CdS microrope composed of twisted nanowires is studied. It is found that the current-voltage (I-V) characteristics show two distinct power law regions from 360 down to 60 K. Space-charge-limited cu…
本研究采用平面硅与纳米硅分别与旋涂法生长的[6,6]-苯基C61-丁酸甲酯(PCBM)形成有机–无机杂化异质结,对比研究了两种异质结界面电学特性的差异。结果显示, 平面Si/PCBM和纳米Si/PCBM两种异质结都表现出明显的整流特性, 但相对于平面Si/PCBM异质结, 纳米Si/PCBM异质结有较大的导通电压和较小的电流密度。为了深入研究导致这种差异的相关物理机制, 通过阻抗谱(IS)表征技术进一步研究了两种异质结因界面变化而产生的电阻、电容的变化趋势。阻抗测试分析表明, Si/PCBM异质结界面存在的大量缺陷致使寄生效应进一步增大, 影响了器件中电荷的输运
The reliable solution of nonlinear parameter estimation problems is an important computation problem in chemical engineering. The present paper is devoted to an application of a nonlinear solving process to a system of transcendent equations. In such systems we may define the values of the parameters �12 and �21 to th…
Official journal of the Institute of Physics - Sri Lanka. Full text articles are available. The journal also has a website at http://www.ip-sl.org/sljp/The new email for the Editor is eic.ipsl@gmail.com.
There were considered the main methods of powders WC production: rapid carbothermal reduction (RCR), «calcination – reduction – carbidization» (CRC), reduction of tungsten oxide by carbon at rotary furnace, method of spray conversion process (SCP), self-propagating high-temperature synthesis (SHS), high energy milling…
An experimental investigation into the removal of aluminum (Al) and calcium (Ca) from molten silicon by using electron beam melting was carried out. Based on the distributions of Al and Ca along the growth direction of the ingot under different solidification conditions, the influence of segregation and evaporation be…
Considering dynamic recovery/recrystallization and twinning effects, in this paper we develop a dislocation-based model to study the strain hardening behavior of TWIP steel. In the model, the dislocation evolution is controlled through a dynamic recovery/recrystallization process at high temperatures, and is primarily…
For usual lossy and lossless dielectric spherical particles, it can never realize zero forward scattering, since their Mie expansion coefficients cannot be totally offset at forward direction. By introducing suitable gain in dielectric spherical particles, we find that the electric and magnetic dipolar responses can a…
A cell for the electrical conductivity measurements of molten salts at the elevated temperatures and vapor pressures of several tens of atmospheres was constructed. The electrical conductivities of molten BeCl 2, ZnCl 2, and PbCl 2 were measured up to temperatures of (823, 1421, and 1320) K, respectively. The melts de…
We use quantum Monte Carlo simulations to study a finite-temperature dimensional-crossover-driven evolution of spin and charge dynamics in an anisotropic two-dimensional system of weakly coupled Hubbard chains with a half-filled band. The low-temperature behavior of the charge gap indicates a crossover between two dis…
Four thermally stable and solvent soluble dyes were prepared from diketopyrrolopyrrole pigment via an N‐alkylation reaction. To improve the thermal stability of the dyes, a hydroxyl functional group that could react with blocked polyisocyanates was introduced into the dyes. The prepared dyes had absorption maxima near…
The swelling behavior of clay minerals is an important issue in industrial processes and environmental applications. Mixed-layer clay minerals containing a smectite fraction, such as rectorite, are neglected even though they could swell and exist in nature widely. The hydration of rectorite has not been well comprehen…
The effect of Gd doping and O deficiency on the electronic structure, exchange interaction, and Curie temperature of EuO in the cubic and tetragonal phases is studied by means of density functional theory. For both defects, the Curie temperature is found to exhibit a distinct maximum as a function of the defect concen…