Materials Literature
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The aims of this study were to fabricate lightweight composites having isotropic electrical and thermal conductivities. The composites consist of expanded polypropylene (EPP) and chopped carbon fibers. They were randomly mixed together and fusion-bonded using steam at a high temperature with a high saturation vapor pr…
Evidence for high-T c cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both XANES measurements and bond valence sum calculations are greater than 2.25 and are in close agreement with each other for s…
REBa 2 Cu 4 O 8 superconductor has an important advantage that the critical temperature ( T c ) is improved by Ca substitution for RE site. We fabricated the YBa 2 Cu 4 O 8 (Y124) and Y 0.9 Ca 0.1 Ba 2 Cu 4 O 8 (YCa124) films by molten hydroxide method in ambient atmosphere and investigated the crystallinity and in-fi…
The electrical insulation system of high-temperature superconducting (HTS) cable consists of liquid nitrogen (N 2 (l)) and polypropylene laminated paper (PPLP). Partial discharge (PD) may occur in butt gaps of the insulation layers and its characteristics imply the insulation performance of HTS cables. N 2 (l) cooling…
We report the fabrication and properties of heterostructures formed by the BiFeO 3 (BFO) ferroelectric and YBa 2 Cu 3 O x (YBCO) superconductor. Four measurement configurations on BFO/YBCO heterojunctions are proposed and showed different I-V characteristics. Moreover, one type of BFO/YBCO heterostructures which had t…
Bichelated neutral palladacycles (1–3), [Pd(L)Cl], were synthesized from reaction of the new potential tridentate (C,N,S) ligands, 2-thiobenzylazobenzene (L1), 4′-methyl-2-thiobenzylazobenzene (L2), and 4′-chloro-2-thiobenzylazobenzene (L3) with sodium tetrachloropalladate(II), Na2[PdCl4], in ethanol. The compounds we…
Polydimethylsiloxane rubber was irradiated at various radiation doses up to 800 kGy in air. The lifetime and intensity of the long component τ3 were obtained by positron annihilation lifetime spectroscopy (PALS). The crystallization property and the molecular flexibility were estimated using the differential scanning…
A tailored distribution of ion induced defects in p-type silicon allows subsequent electrochemical anodization to be modified in various ways. Here we describe how a low level of lattice amorphization induced by ion irradiation influences anodization. First, it superposes a chemical etching effect, which is observable…
Highly ordered mesoporous SBA-15 catalysts with different pore diameters decorated with various amounts of highly dispersed iron oxide nanoparticles were prepared by using a simple wet-impregnation technique. The structural order of the samples before and after the encapsulation of iron oxide nanoparticles were analys…
Axial Flux Electrical Machines (AFEM) with good power-to-weight and diameter-to-length ratio and high efficiency are very attractive for most industrial and power applications. Investigations with both theoretical and experimental methods of ac losses are important for a reliable prediction of dissipation mechanisms i…
The magnetic flux penetration into the melt-textured Y-Ba-Cu-O high temperature superconducting bulk magnets were precisely evaluated during and after the pulsed field magnetization processes operated at 30 K. The bulk magnets were carefully fabricated by the cold seeding method with use of a single and a pair of seed…
SUMMARY This work discusses the performance impact from the tetrahedralization of non‐conforming meshes generated by a parallel octree method capable of handling arbitrary immersed geometries. First, we review conforming techniques for meshes created from octrees. Then we implement a tetrahedralization scheme based on…
NFPA 921 is a guide produced by the National Fire Protection Association that fully details the steps, processes, and procedures for fire and explosive investigations. Caution: Fire scenes pose a special risk of danger to the crime scene investigator through weakened structural integrity, toxic fumes/residues, and the…
MgB 2 has been catching the attention due to the possibility to apply the material in magnets and electronic devices, operating with cryocoolers. In this work, MgB 2 bulks were developed and analyzed with addition of ZrB 2 , another diboride with the same C32 hexagonal structure as MgB 2 , and simultaneous addition of…
Nitrofurazone (NTZ) is usually employed in the topical treatment of infected wounds and lesions of both skin and mucosa. Microencapsulation is a process utilized in the incorporation of active ingredients within polymers aiming at, among other objectives, the prolonged release of pharmaceutical compounds and protectio…
Abstract A 2D non‐isothermal reaction engineering model for a tubular reactor was developed for a complex reaction network of salicylic acid nitration. The influence of different operating and design parameters was studied to minimize the amount of secondary nitration products and limit the maximum temperature inside…
Magnetic decoration of BaFe 2 (As 1−x P x ) 2 revealed an hexagonal vortex lattice in overdoped single crystals ( x >0.4, T c =14-18 K). A disordered vortex lattice was observed in a crystals with optimal content of phosphorus (x ≈ 0.4, T c = 25-30 K). Magneto-optical studies and global magnetization measurement of th…
This study designed composite wooden construction elements strengthened with woven wire fiberglass netting and determined the technical attributes. Scots pine (Pinus sylvestris L.) was used in wooden layers, and woven wire fiberglass netting was used in intermediate layers. Layers were pressed with polyvinyl acetate (…
The effect of barium transport on the operation of dispenser hollow cathodes was investigated in numerical modeling of a cathode with two different orifice sizes. Despite large differences in cathode emitter temperature, emitted electron current density, internal xenon neutral and plasma densities, and size of the pla…
In the article an analysis of thermal and spectroscopic properties of heavy metal oxide glasses from the Bi2O3-Ga2O3- Na2O-Ge2O3 system doped with rare earth elements were presented. It has been focused on the elaboration of the glass composition in terms of low phonon energy, high transparency in the range of infrare…