Materials Literature
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We have studied the magnetic and electronic properties of Eu1−xSrxCoO3 with 0/16≤x≤12/16. In the Sr doping range from 2/16 to 11/16, the ferromagnetic clusters coexist spatially with an antiferromagnetic matrix. The magnetization at low temperatures strongly depends on the Sr concentration x, exhibiting a maximum near…
The x-ray structural, resistive, magnetic, and Mn55 NMR methods are used to investigate the ceramic magnetoresistive lanthanum manganite perovskites La0.6Sr0.2Mn1,2−xFexO3 (x=0, 0.02, 0.05, and 0.1) annealed at 1170 and 1500°C. It is found that increasing the Fe content decreases the metal-semiconductor phase transiti…
Article Gradient Elasticity with Interfaces as Surfaces of Discontinuity for the Strain Gradient was published on August 1, 2007 in the journal Journal of the Mechanical Behavior of Materials (volume 18, issue 4).
Using a photoelastic modulator‐based novel set‐up, the electric field‐induced in‐plane birefringence and the optical rotatory power (ORP) were measured of an antiferroelectric liquid crystalline compound (12OF1M7) in its various phases using 30 µm homeotropic cells. Some specific signatures of the in‐plane birefringen…
In their physical properties, the γ-Fe-Ni alloys can be separated into three groups of materials: invars, high-nickel alloys, and medium-nickel alloys of the transition class. In the invars and alloys of the transition class in the temperature interval ΔT adjoining T C, a weak ferromagnetic state arises. In high-nicke…
Abstract From leaching experiments with metallic uranium-aluminum research reactor fuel elements in repository-relevant MgCl 2 -rich salt brines, a Mg-Al layered double hydroxide (LDH) with chloride as the interlayer anion was identified as a crystalline secondary phase component. The incorporation behavior of europiu…
Abstract Strain produces small but systematic changes in the Raman and luminescence spectra of solids. Piezospectroscopy is a technique that exploits these changes for determining stresses, usually from shifts in a characteristic spectral line. In this review in honor of Wolfgang Pompe, recent advances in piezospectro…
Abstract Pliocene volcaniclastic lacustrine rocks of the Doğanbey formation in the Beyşehir region (central Anatolia) are composed of organic-matter-bearing claystone, clastic units and dolomite interbeds, suggesting an anaerobic, shallow swampy, lacustrine depositional environment. The depositional environment was su…
Zirconia-and scandia-based complex solid solutions predominantly with a monoclinic structure are prepared by mechanochemical synthesis. The dense ceramic materials, which, for the most part, have a cubic structure with grain sizes of 250–400 nm and possess good mechanical properties, are produced by sintering submicro…
The concept of composite right left-handed transmission lines provides for one additional degree of freedom in realizing arbitrary dual-band frequency response devices. In this letter, an arbitrary dual-band operation mixer, based on the classical balanced mixer topology is proposed. The prototype demonstrates the mix…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
A series of 2‐(4‐n‐alkylphenyl)indenes (3) with different alkyl substituents (CH3 to C10H21) were synthesized and systematically characterized using differential scanning calorimetry, polarizing optical microscopy and X‐ray diffraction compared with 2‐phenylindene (3a). Depending on the alkyl chain length, highly orde…
<abstract language="eng">The crystallization of hydroxyapatite (HA) in aqueous solution can be described by the mechanism ACP -> OCP -> HA. In this work, it was studied the influence of K+, Mg2+, SO4(2-) and CO3(2-) ions in the formation of ACP and in its conversion to OCP, using biomimetic coatings on metallic substr…
Temperature dependent dielectric properties of 92% and 99.6% polycrystalline aluminum oxide (Al2O3) substrate materials between room temperature and 550degC are reported, and compared with those of 96% Al2O3. Parallel-plate capacitors with aluminum oxide dielectrics and gold electrodes were used for measurement of the…
Abstract A polydimethylsiloxane (PDMS) modified polyolefin (obtained by reacting an ethylene‐ethyl acrylate‐maleic anhydride (EEAMA) copolymer with an amine terminated PDMS in the melt phase) was used as a processing aid to facilitate the extrusion of linear low density polyethylene (LLDPE). In blends of LLDPE and PDM…
We report the results of investigation on the mechanism of dark conductivity and dielectric relaxation of Bi12GeO20 single crystals and dense ceramics. Alternating current electric characterization was performed in the temperature interval from 30 °C up to 730 °C and frequencies from 1 Hz to 13 MHz. The samples presen…
The aim of this study was to evaluate the benthic diatom composition from the estuary sediment in the Pernambuco State, based on 32 samples. Samples were collected monthly from September through December 1999 (dry period) and from April through July 2000 (rainy period) during four pre established sampling stations. Re…
Liquid-phase sintering of aluminum nitride (AlN) with additives was reviewed. The most important innovation was the discovery of critical sintering aids for AlN densification, specifically rare-earth compounds and alkali-earth compounds. These additives are extremely valuable for increasing thermal conductivity by tra…
The electrical conductivity of molten MCl-NdCl 3 (M = Li, Na, Rb and Cs) has been measured from the liquidus temperature up to ~ 1180 K. The measurements were performed in usual U-shaped capillary quartz cells with platinum electrodes. The molar conductivity (Λ) has been computed by using literature data on the densit…
The absorber materials used in anechoic and semi-anechoic chambers and the field uniformity are described in this paper. The field uniformity of anechoic chamber is simulated with software HFSS 10.0, Ansoft. A low frequency model for absorber-arrays is obtained using the method of homogenization. The simulation result…