Materials Literature
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The effect of heat treatment on the optical properties of heterostructures containing titanium and tungsten oxide films is studied. The films were synthesized on a quartz glass substrate in low-temperature lowpressure plasma. It is found that the heat treatment of the samples containing the tungsten oxide films in vac…
In current research, the authors intend to find the optimal arrangement of planar thermoelectric modules to maximize the generated electricity and minimize the maintenance cost of a power system called Damavand power plant. Optimal arrangement is done by mounting a number of thermoelectric modules within the condenser…
Three-dimensional porous graphene frameworks functionalized with redox molecules can be used for the fabrication of highly flexible solid-state supercapacitors as demonstrated by Xiangfeng Duan and co-workers on page 5779. These devices reveal superior capacitive performances and extraordinary mechanical flexibility.…
Chemical vapor deposited (CVD) graphene is one of the most widely-used methods to get large-area graphene. However, both CVD fabrication process and necessary transfer process will introduce a lot of defects. Therefore, reducing the defects in CVD graphene is a critical problem. In this work, we report the annealing e…
Specific features of plastic deformation and tensile failure of a spring steel with systematically various pearlite fineness obtained by isothermal transformation have been investigated by uniaxial tensile tests and electron microscopes. The results indicated that pearlite interlamellar spacing has an important influe…
A novel recirculating loop microreactor coupled to an ultrahigh vacuum (UHV) chamber has been constructed for the kinetic evaluation of model catalysts, which can be fully characterized by UHV surface science techniques. The challenge for this reactor design is to attain sufficient sensitivity to detect reactions on m…
In this paper, we report the fabrication of a homogeneous anisotropic invisibility carpet cloak that works for transverse magnetic (TM) wave in free space. Linear coordinate transformation is employed for the design of the dielectric tensors, and the cloak is made of Al 2 O 3 slabs with a Teflon background. The triang…
Phase resolved partial discharge (PD) data have been recorded from electrical trees grown in a flexible epoxy resin, a silicone gel and a silicone rubber with and without a nanofiller. The epoxy resin samples and silicone gel samples did not contain any filler particles. In the case of silicone rubber, organo-Montmori…
Abstract Zr–Nb–Cr alloys were used to evaluate the effects of alloying elements Nb and Cr on corrosion behavior of zirconium alloys. The microstructures of both Zr substrates and oxide films formed on zirconium alloys were characterized. Corrosion tests reveal that the corrosion resistance of Zr x Nb0.1Cr ( x = 0.2, 0…
In the present communication, doping of polyaniline (PANI) has been carried out with multiligand urea complex of cobalt(II) via in situ oxidative polymerisation by ammonium persulphate. The dopant has been synthesised and characterised using elemental analysis, Fourier transform infrared (FTIR), X-ray diffraction (XRD…
Plasma-facing components (PFCs) in fusion devices are exposed to an irradiation environment of high particle flux. Among various candidate materials for PFCs, graphite is used as a first-wall material of the Korea Superconducting Tokamak Advanced Research (KSTAR) and tungsten is being strongly considered as a divertor…
We report here the experimental observations that the tip topography of ZnO nano-prisms sensitively depends on the percentage of oxygen in the flux of the carrying gas in vapor growth. At a relatively high oxygen concentration, a number of thin filaments can be nucleated atop nano-prisms, forming a unique fish-spear–l…
In recent years, the miniaturization and greater power output of motors for EVs and HEVs have led to the higher drive voltages and the increased adoption of rectangular wire in coils (higher volume ratio). In order to ensure that the motor is electrically insulated, it is necessary to restrict partial discharges betwe…
This work establishes a mathematical model of fuel transport efficiency in anode that permeates from the surface to the triple phase boundaries through the porous electrode of solid oxide fuel cells. And the relationship between the fuel transport efficiency and the parameters of the porous anode and gas channel is ve…
This paper describes the methods that are applicable for the preparation of aluminium-based quasicrystals. Application of rapid solidification of the melt, mechanical alloying and reactive sintering of metallic powders are presented. Based on the conducted experiments, mechanical alloying seems to be the most promisin…
Ferdowsiite is a member of a mineral association subsidiary to the principal metamorphic minerals of the Barika ore deposit in NW Iran. The empirical formula of ferdowsiite (based on 32 apfu, 16Me + 16S) is Ag7.97Pb0.08 Sb4.75As3.15Bi0.01S16.04. The crystal-structure formula is Ag8(Sb5.49As2.51)∑8S16; the simplified f…
The heterogeneous hydroisomerization and hydrocracking of n-heptane was carried out within the pores of the mesoporous SBA-15 silicas, within which was encapsulated trimetallic nanoparticles of Pt-Ni-Co. The structural and textural features of the nanoporoussilicas, both with and without encapsulated nanoparticles, we…
6M KOH 수계 전해액에 potassium poly(acrylate) (PAAK)를 3 wt% 포함시켜 제조한 하이드로겔을 poly(acrylonitrile)부직포 분리막에 코팅하고, 이를 활성탄 수퍼커패시터의 분리막 및 전해질로 사용하여 수퍼커패시터의 고율특성 향상을 시도하였다. 이 분리막 및 전해질은전자현미경 관찰 결과 PAAK 하이드로겔이 부직포의 표면기공에 균일하게 코팅되어 있으며, 24일 동안 하이드로겔의 합습도가 230% 이상으로 균일하게 유지되었고, 6 M KOH 전해액을 사용한 경우(<TEX>$3.6{\times}10^{-2}Scm^{-1}$</TE…
Polypropylene nanocomposites containing 1–5 wt% of nano α-alumina particles are prepared using a Hake internal mixer. Mixing of nano α-alumina particles is performed at 170℃ and 50 rotational per minute is set for the rotor speed. To improve the dispersion of the nanoparticles, sodium dodecylbenzenesulfonate is used.…
The zirconium dioxide-doped polypyrrole composites with different weight percentage were prepared by in situ polymerization methods. The prepared composites were subjected for characterization with different tools like Fourier transform infrared spectroscopy and scanning electron microscopy. The Fourier transform infr…