Materials Literature
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The results of investigation of the complex permittivity and permeability of polymer composite materials with different magnetic fillers in the frequency range of 1 MHz to 10 GHz are presented. The possibility of controlling the frequency characteristics of permeability and permittivity and the absolute values of thes…
The structural environment of substitutional Cr 3+ ion in a natural pyrope Mg 3 Al 2 Si 3 O 12 has been investigated by Cr K-edge extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) coupled with first-principles computations. The Cr-O distance is close to that in knorringi…
Since the discovery of vulcanisation, rubber has become an indispensable material for the technological development of civilisation, starting from a simple balloon to complex rocket propellant. Rubber Industry worldwide is using on an average 50% of raw materials. These materials are mostly petroleum-based, except nat…
A novel ldquoshunt attachrdquo configuration for chip-scale thermoelectric (TE) generation of electric power from microprocessor waste heat is described, modeled, and parametrically analyzed. The generated electricity is used to drive a cooling fan that convectively cools the chip. A prototype using heat-driven coolin…
Aluminum oxide nanopowders are prepared by the gas phase method and characterized according to the particle sizes and the phase composition. Samples of the nanostructured ceramic material are produced by pressing and annealing in air. The photoluminescence and cathodoluminescence spectra of the Al 2 O 3 nanostructured…
Abstract The influences of inorganic phosphates, as residuals and/or impurities within starch, on the adhesion of acid‐treated cornstarch phosphates to cotton and polyester fibers were investigated for warp sizing. The phosphate impurities considered included sodium dihydrogenphosphate, sodium hydrogenphosphate, sodiu…
HYPOTHESIS: The immunodeficient (severe combined immunodeficiency beige [SCID/bg]) mouse model provides a useful model for investigating vascular neotissue formation in human tissue-engineered arterial conduits (TEAC). DESIGN: Human aortic smooth muscle cells and endothelial cells were statically seeded on porous biod…
The determination of enzyme activities and the screening of enzyme regulators is a major task in clinical chemistry and the development of new drugs. A broad variety of enzymatic reactions is associated with the consumption or formation of small molecules like H(2)O(2), ATP, pyrophosphate, or phosphate. Luminescent la…
Knoop indenters were prepared from nanopolycrystalline diamonds (NPDs) synthesized by direct conversion sintering from graphite under high pressure and high temperature. Owing to the fine structure (grain size: 10-100 nm) of NPD, high-accuracy sharp edges could be formed at the indenter tips. The indentation tests dem…
The perovskites Sr 2 MnRuO 6 and LaSrMnRuO 6 have been investigated and their properties compared with those of the broader family of A 2 MRuO 6 double perovskites (A=Sr, La; M=Cr, Mn, Fe, Co, Ni). Neutron powder diffraction shows that both phases lack long‐range Mn/Ru order. Sr 2 MnRuO 6 exhibits a cooperative Jahn–T…
The oxidation of MnII carboxylates by (NBu4)Cr2O7 in the presence of different phosphonic acids and chelating ligands results in six CrIII-doped tetranuclear manganese clusters formulated [Mn3CrO2(O2CCH3)4(O3PC5H4N)2(bpy)2] (1), [Mn3CrO2(O2CCH3)4(O3PC5H4N)2(phen)2] (2), [Mn3CrO2(O2CPh)4(O3PC5H4NO)2(phen)2] (3), [Mn3Cr…
Large Microwave Birefringence Liquid-Crystal Characterization for Phase-Shifter Applications, Dubois, Frédéric, Krasinski, Freddy, Splingart, Bertrand, Tentillier, Nicolas, Legrand, Christian, Spadlo, Anna, Dabrowski, Roman
Magnetic, magneto-thermal and magneto-transport properties investigated in R(2)Al compounds reveal interesting aspects regarding the magnetic state of these compounds. The coexistence of ferro and antiferro magnetic order is seen to determine the magnetic and other related properties. The crystal field effect is found…
The part of electronics packaging is steadily forced to adapt the requirements of the microelectronic industry. For future electronics application such needs will be: 1) steady miniaturisation of the electronic devices 2) high pin count up to 5000 i / o per device 3) pitches down to 20 mum 4) higher current density pe…
We studied the following to improve the characteristics of the lead-free ultrasonic micromotor. A double-mode miniature cantilever-type ultrasonic motor was fabricated using array-type multilayer piezoelectric ceramics (A-MLPC) of (Sr,Ca) 2 NaNb 5 O 15 (SCNN) such as lead-free piezoelectric materials, and the electric…
Real-time, time-dependent density functional theory (RT-TDDFT) is used for the evaluation of the frequency dependence of the polarizability and hyperpolarizability of molecules intended for application in electro-optic devices. These first-principles computational methods are powerful but costly. Significantly easier…
The structure of a decagonal quasicrystal of Al64Cu22Co14, which was a single-grain specimen (a few mm in size) grown by slow-cooling from a melt and subsequently annealed at 1073 K, was investigated using electron diffraction and scanning transmission electron microscopy (STEM). Electron diffraction patterns of the A…
The magnesium alloy Mg–5%Y–2%Nd–2%RE–0.5Zr, known as WE54, was heat treated to produce different particle dispersions. Specimens were then compressed to a strain of 8%, and this resulted in prolific mechanical twinning. EBSD analysis revealed that twins were operative in this alloy, a twinning mode not reported before…
Magnetic shape-memory alloys owe their exceptional properties primarily to the accompanying effects of a martensitic phase transformation. The twinning disconnection as elementary carrier of magnetic-field-induced deformation is the starting point of the present study. A disconnection is a line defect similar to a dis…
The structural and ferromagnetic properties of Zn0.95Co0.05O films grown on Si and LiNbO3 (LNO) substrates have been studied as a function of thickness (15–900 nm). The structural characterizations indicate that the c-axis lattice constant and Co–O bond length slightly decrease with the increase in film thickness, imp…