Materials Literature
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An accurate and flexible system for magnetic permeability measurements is described. In particular, effects such as eddy currents and signal drift are minimized by exploiting the main system features: (i) high-performance digital integration by means of a digital integrator, with a theoretical resolution of 10 ppt usi…
We consider the zigzag half-nanotubes (tight-binding approximation) in a uniform magnetic field which is described by the magnetic Schrödinger operator with a periodic potential plus a finitely supported perturbation. We describe all eigenvalues and resonances of this operator, and theirs dependence on the magnetic fi…
Effects of preheating treatment on the microstructural features and the ECAP formability at room temperature were investigated for an AC4CH aluminum alloy. The preheating treatment at the temperature range from 260 to 560°C improved the ECAP formability at room temperature, especially at around 350°C the occurrence of…
The near-surface RADON type radioactive waste repository, installed in 1963 and designed to store radio- active waste formed in industry, medicine and scientific investigations, was closed in 1989 because it did not meet the requirements imposed on the radioactive waste disposal. A comparatively small amount of radioa…
A major problem in achieving high production rates in metal cutting industry is Tool Wear. Prolonged tool life has gained significance with the discovery of materials like hard steels, and the urge to maintain tighter geometric tolerances and improved surface finish. Strengthening of the edge and prevention of its det…
Magnetothermal properties of high-spin chloro(2,3,7,8,12,13,17,18-octaethylporphyrinato)manganese(III), chloro(5,10,15,20-tetraphenylporphyrinato) manganese(III), bromo(5,10,15,20-tetraphenylporphyrinato)manganese(III), and (acetato)(5,10,15,20-tetraphenylporphyrinato)manganese(III) complexes as 6% water suspensions w…
The reaction of N, N-bis(2-hydroxyethyl)glycine (bicine; bicH(3)) with Cd(O(2)CPh)(2) · 2H(2)O in MeOH yielded the polymeric compound [Cd(2)(O(2)CPh)(2)(bicH(2))(2)](n)(1). The complex crystallizes in the tetragonal space group P4(1)2(1)2. The lattice constants are a = b = 12.737(5) and c = 18.288(7) Å. The compound c…
Ordered trench structures with high aspect ratios were formed by the anisotropic anode etching of (100)-oriented Al foils. A thin polymer mask with a periodic line and space pattern enabled the selective anode etching of Al in an electrolyte containing ions. The shape and depth of the obtained trenches were strongly d…
Powder- and tape-like joining materials composed of SiC with Al–B–C (ABC) or Al–B4C–C (ABCC) sintering additives were used for the joining of SiC. The effect of interlayer composition, joining temperature and particle size of SiC on the microstructure and mechanical properties of SiC joints was studied. The results in…
O desenvolvimento de nanopartículas magnéticas tem sido levado a cabo devido à sua importância tecnológica. Os materiais nanoparticulados magnéticos exibem uma série de propriedades interessantes, entre as quais citam-se as propriedades elétricas, ópticas, magnéticas e químicas. As nanoestruturas podem ser utilizadas…
Batch polymerization of isoprene was carried out at 25∘C in a normal microemulsion stabilized with sodium dodecyl sulfate and initiated with the redox couple tert‐butyl hydroperoxide/tetraethylene‐pentamine. Characterization by transmission electronic microscopy showed that polyisoprene nanoparticles with number‐avera…
We present a new approach to the classic problem of surface-diffusion–driven pattern decay, relevant in nanoscale applications. By means of a generalized Fourier expansion of the pattern shape, considered as a quasiperiodic function, we can very accurately describe the pattern shape during the whole decay process. The…
Micron-sized SrSO4 particles having mono-dispersed/narrow distributions have been produced with a double-jet semi-batch reactive crystallizer. Slow molar feedings over a short time maintained proper supersaturation levels and result in narrow distributions due to the prevention of agglomeration growth of small primary…
The electronics industry has always had a requirement for a range of metallised dielectric materials to form the conductive tracks used in many electronic products. It is essential that there is excellent adhesion between the dielectric material and the metal or other conductive track since without this failure of the…
Six MnII 3-sulfobenzoate complexes with neutral ligands, [Mn(4,4′-bipy)2(H2O)4](3-sb)·3H2O (1), {[Mn(3-sb)(bpe)1.5(H2O)2](bpe)0.5·H2O}n (2), [Mn(3-sb)(phen)(H2O)3](4,4′-bipy)·H2O (3), [Mn2(3-sb)2(phen)2 (4,4′-bipy)(H2O)4] (4), [Mn(3-sb)(phen)2(H2O)] (bpe)0.5·4H2O (5), and [Mn(3-sb)(phen)2(H2O)](bpe)0.5·H2O (6) [where…
A solution resistance reduced solution flow type micro-droplet cell with co-axial dual capillary tubes was developed. A Pt counter electrode wire, 50 μm diameter, inserted in the inner capillary tube, successfully reduced solution resistance between the working and counter electrodes. The potentio-dynamic polarization…
Ag+-Zn2+-zeolite antimicrobial (AZZA) with high antibacterial efficiency and good color stability was prepared by ion-exchange method in water phase, followed by surface modification. Taking the modified AZZA as raw material, antibacterial polyethylene (PE) master batch was prepared and applied in PE plastic. In this…
Hybrids of β-tricalcium phosphate (β-TCP) and poly(L-lactic acid) (PLLA) have been fabricated, which can be expected to be a novel filler for biodegradable bone grafting. Firstly, porous β-TCP ceramics have been made of calcium-phosphate fiber synthesized by homogeneous precipitation method. Then, the hybrids have bee…
Polymers are the most versatile class of biomaterials, being extensively applied in diverse medical fields such as tissue engineering, implantation, artificial organs, medical devices, prostheses, contact lenses, dental materials and pharmaceutical vehicles.1 Compared with other types of biomaterial...
An aldehyde-acid copolymer/MMT nano-composite [P(MAA-AL)/MMT nano-composite] was prepared via monomer in-situ polymerization. Then the nano-composite was applied in a leather tanning process and the leather structure was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The reaction mech…