Six models based on different fin configuration of the energy storage tank with phase change material were established. The structure model 3 is designed by topology optimization method. thermal and release process six calculated numerical simulation results show that according to 2, Thermal are both satisfactory agreement results. Uniformity temperature liquid fraction also significantly improved. Moreover, can reduce time 70% compared 2 81%. Furthermore, comparison all 6 models, design...

Cobalt ferrite (CoFe2O4, CFO) nanoplatelets with a rhomboidal shape were synthesized through facile hydrothermal route using very low concentration precursor at temperatures. The effects of reaction temperature and time on the morphologies as well sizes products systemically investigated. as-synthesized CFO nanocrystals showed special crystal growth along (111) direction. plays an important role in forming such ultrafine size. single-phase 180 °C size 17 nm present high saturation...

A two-level model of tunneling magnetoresistance (MR) containing coplay the relative orientation moments between clusters, intrinsic characters and Coulomb blockade effect, is presented. Based on Monte Carlo simulation, spin configurations, MR resistivity as function temperature field were studied, respectively. Simulated results are found to be in good agreement with recent experimental data. The unusual enhancement attributed interaction clusters character clusters. Although effect plays...

We have proved that Cs2SnI6−xBrx (x = 0–6) can be eutectic in the whole composition, and phase has similar cubic symmetry with both of end phases (space group Fm3¯m). The lattice constant decreases from around 11.67 Å 0) to 10.83 6). Hall-plot analysis shows strain varies sharply near two materials, while is almost independent Br content at middle content. bandgap, on other hand, increases 1.26 eV 2.93 increasing content, which might expected fabricating continuous junction solar cells.

Polycrystalline anatase Ti1−xCoxO2 (x=0–0.06) films have been fabricated by sol-gel spin coating. The effects of Co doping on the structural, optical, and magnetic properties are investigated. It is shown that oxygen vacancies and/or defects in generated during thermal treatment vacuum. reduces crystal quality inhibits crystalline grain growth. Due to introduction Co, photoluminescence (PL) spectra become weak band gap emission has a blueshift. PL reveal solubility lower than 0.02. At 300 K,...

Abstract CdS is an important semiconductor used in optoelectronic devices. Simple techniques for growing nanostructures are thus essential at a low cost. This study presents novel method single-crystal n -type nanowires on p CdTe films by thermal annealing H 2 S/N mixed gas flow, which does not require the help of catalyst or template. The formation process and growth mechanism investigated. Well-dispersed whiskerlike obtained appropriate temperature duration. We suggest that stress-driving...

Passivation on the surface or interface is one of key issues in fabricating efficient and stable perovskite solar cells (PSCs). In this Letter, we report a way to passivate buried film by optimizing growth kinetics precursor film. A solvent-controlled (SCG) strategy adopted, that is, inducing solvent volatilization before high-temperature annealing. It found distribution films. The vacuum pretreated can obtain dense avoid generation small grains pores at interfaces perovskite/electron...

Co 3 O 4 nanoparticles with and without covering of residues from the decomposed polymer at surface have been fabricated, respectively. It has revealed that anomalous magnetic properties covered deviate greatly those ones residues. In comparison “naked” Co3O4 nanoparticles, for “covered” sample, saturation field, coercivity, loop shift average permanent moments per particle are enhanced remarkably. is believed their significant difference caused by presence surface, consistent to reported...

Manganese is a common dopant to achieve dilute magnetic semiconductors. Most semiconductors are hole-type and the Curie temperature critically depending on holes concentration. Boron can be used increase concentration enhance temperature. In systems with both Mn B dopants, one must consider properties of MnB. this study, single phase MnB alloy has been fabricated characterized. Magnetic have studied using superconducting quantum interference device vibrating sample magnetometer over broad...

For intercepting modern high maneuverable targets, a novel adaptive weighted differential game guidance law based on the theory of mixed strategy is proposed, combining two laws which are derived from perfect and imperfect information pattern, respectively. The weights vary according to estimated error target's acceleration, generated by directly using estimation acceleration when small, with penalty coefficient implemented large. coefficients not constants they can be adjusted current...

High-quality Ga-doped ZnO (ZnO:Ga) single crystalline films with various Ga concentrations are grown on a-plane sapphire substrates using molecular-beam epitaxy. The site configuration of doped atoms is studied by means x-ray absorption spectroscopy. It found that nearly all can substitute into lattice as electrically active donors, a generating high density free carriers about one electron per dopant when the concentration no more than 2%. However, further increasing doping leads to...

The mechanism of a Ag/SiN_x firing-through process in the manufacture crystalline silicon solar cells.

A large magnetocaloric effect (MCE) has been achieved in a rare-earth-free CoMnSb alloy at low magnetic field and intermediate temperature. It is interesting to note that relatively entropy change ∣ΔSM∣ of 2.06J∕kgK with ΔH=0.9T was obtained around 471K. Arrott plots various temperatures reveal second order transformation occurs near the Curie The origin ΔSM under conditions temperature attributed transition from ferromagnetic paramagnetic. These results suggest good candidate for MCE when...

The quaternary topological insulator (Bi,Sb)2(Te,Se)3 has demonstrated surface states with an insulating bulk. Scientists have identified optimized composition of Bi1.5Sb0.5Te1.7Se1.3 the highest resistivity reported. But physics that drive to this remains unclear. Here we report crystal structure and magneto-transport properties Bi1.5Sb0.5Te3-xSex (BSTS) series. A correlation between physical been revealed. We found out within rhombohedral structure, most Te substituting Se resistivity. On...

Single‐phase Bi 2 Fe 4 O 9 is synthesized successfully by the solid‐state reaction technique with FeCl ·6H additives. The two optical band gaps, and iron ion's chemical valence state both decrease addition of O, which may be attributed to in split energy 3 d orbital.