Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In fragile glass-forming ionic melts, spectra of the ionic conductivity have been taken in wide ranges of frequency and temperature. In our experiments, we have studied and over more than ten decades on the frequency scale, including the far infrared. The results exhibit characteristic traits, and a clear-cut picture…
The synthesis and characterisation of the first banana-shaped mesogens which exhibit a direct transition from the antiferroelectric B2 phase to the nematic phase are reported.
The depth profiles of D atoms and D 2 molecules in W single crystals and hot-rolled W implanted with 6 keV D ions at 300 and 650 K were determined by means of secondary ion mass spectrometry (SIMS) and residual gas analysis (RGA) measurements in the course of surface sputtering. Retention of deuterium and lattice dama…
To clarify the deformation mechanisms and to improve the mechanical properties of dynamic vulcanizates, we studied their deformation behavior by Fourier-transform infrared (FTIR) spectroscopy. It was found that the orientation in the dispersed phase (EPDM phase) is higher than in the matrix (PP phase) upon loading. Th…
The crystal structures of two kinds of nitronyl nitroxide biradical with a phenolic substituent, 2,4-bis(1-oxyl-3-oxido-4,4,5,5-tetramethyl-2-imidazolin-2-yl)phenol (1a) and 4-methyl-2,6-bis(1-oxyl-3-oxido-4,4,5,5-tetramethyl-2-imidazolin-2-yl)phenol (2a) have been solved. The biradical 1a belongs to the monoclinic sy…
The detailed structure analysis for a series of the Al–Mn–Fe–Si Mackay-type 1/1-cubic approximants has been performed by applying the Rietveld method to the x-ray powder diffraction spectra taken with a synchrotron radiation x-ray source. We found that identical Mackay clusters occupy both the body-center and vertex p…
Many modern induction motor applications involve nonsinusoidal voltage supply. Under such operating conditions, the motor performance can be seriously affected while the standard equivalent circuit is no more adequate for the motor analysis. In this paper, a modified equivalent circuit topology is introduced, in order…
The formation of film coatings from aqueous polymer dispersions is a complex process, highly dependent on additives and process parameters. Release instability of modified release coatings from aqueous polymer dispersions is a frequently described problem that hinders the general application of such dispersions. Howev…
Anisotropic thermoelectric properties of crystal-axis oriented polycrystals of layer-structured oxide in the Ca-Co-O system was discussed. Plate-like particles of (Ca2.7Bi0.3) (Co3.7Cu0.3)O9+δ were synthesized. To improve the thermoelectric properties, a c-axis oriented polycrystal of (Ca2.7Bi0.3) (Co3.7Cu0.3) O9+δ wa…
The addition of glass phase can control the grain boundary structure and hence the mechanical properties of tetragonal zirconia polycrystals (TZP). To reveal the effect of the glass dopant on the high-temperature deformation behavior of TZP, SiO2-doped TZP, (SiO2–Al2O3)-doped TZP, (SiO2–MgO)-doped TZP and undoped TZP…
Lanthanum manganite, an air electrode material of solid oxide fuel cells, is well known for its complicated nonstoichiometry, which depends upon oxygen partial pressure. This nonstoichiometry is considered to have a relation to electrode activity as it affects oxygen activation and/or oxide ion sink sites, etc. Howeve…
In a uniform field arrangement, under direct voltage, positive streamer propagation and breakdown are investigated along cylindrical insulators with different profiles, inserted perpendicularly between two parallel plane electrodes. The basic properties of streamer propagation and breakdown, namely the electric field…
This paper presents a physical model of the properties of polycrystalline ferrites below magnetic saturation, a common condition in many applications of ferrites in microwave devices. The properties are mainly characterized through the elements of the effective permeability tensor as functions of magnetization state,…
With the goal of reducing SF/sub 6/ gas usage, we investigated partial discharge (PD) and breakdown (BD) mechanisms in ultra-dilute (0 to 1%) SF/sub 6//N/sub 2/ gas mixtures. The experimental results and discussions are given in this paper. In particular, we focused our research on the transition characteristics of th…
To construct an artificial photosynthetic system, multi-Zn(II)-mesoporphyrins in peptide dendrimers were equipped as a photosensitizer of photoinduced hydrogen evolution in a four-component system (electron donor, photosensitizer, electron carrier, and catalyst), so that hydrogen was evolved effectively by the dendrim…
The results of an X-ray photoelectron spectroscopic investigation of the oxidation of surface layers of low-density polyethylene (LDPE) and biaxially oriented polypropylene (BOPP) films are presented. The analysis was performed using different take-off angles, namely 10°, 30°, and 90°; thus, the depths of the examined…
The first structural report of an unprecedented organotellurate(IV) inorganic-organic hybrid macrocyclic host encapsulating a bromide anion guest is described.
Two mesogenic thioindigo derivatives containing oligomeric di- and trisiloxane end-groups were synthesized in optically pure form. These materials form enantiotropic SmA* liquid crystal phases over temperature ranges of 120–143 °C and 110–146 °C, respectively, and exhibit electroclinic switching. The electroclinic coe…
Poly(epsilon-caprolactone-co-D,L-lactide) copolymers with 10, 30, and 50% by weight of silk particles (size range: 5-250 microm) derived from Bombyx mori were blended in acetone solution. After evaporation of the solvent, the morphology, thermal behavior, and mechanical properties of the composites were examined. The…
This work investigated the thermal stability of tungsten carbide films deposited by a sputtering process with a WC target as diffusion barrier layer between Cu and Si. The as-deposited film has a nanocrystalline structure and a low electrical resistivity of around 227 μΩ cm. Film characterization reveals that the film…