Materials Literature
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Summary The organic matter in soils may be stabilized by its interactions with minerals. We have studied such interactions in a Haplic Alisol under forest in which clay and organic matter have migrated from an eluvial A horizon to accumulate in an illuvial B horizon. We have tried to trace the fate of organic matter i…
The gas flow rates for hazardous air pollutant emissions are generally large and their concentrations are low (in parts per million levels). When we try to directly treat the large flow rate and low concentration exhaust gas, the size of the equipment becomes large, resulting in high operating cost. The objective of t…
ABSTRACT: The dissolution kinetics and mechanical properties of whey protein concentrate (WPC) gels were investigated as part of a general study on cleaning mechanisms of milk fouling. The dissolution results showed that the WPC gel is a suitable model material to simulate milk fouling and the dissolution process is a…
Si 3 N 4 /SiC composite ceramics were sintered and subjected to three‐point bending. A semi‐elliptical surface crack of 100 μm surface length was made on each specimen. The crack‐healing behavior under cyclic stress of 5 Hz, and resultant cyclic fatigue strengths at healing temperatures of 1100° and 1200°C, were syste…
Abstract The crystal structure of kröhnkite [Na 2 Cu(SO 4 ) 2 ·2H 2 O], which contains infinite chains composed of CuO 6 octahedra corner-linked with SO 4 tetrahedra, was originally determined 1952 by Dahlman. Since then, a large number of both minerals (e.g., collinsite, fairfieldite, etc.) and synthetic compounds wi…
Effects of Ni or Mn doping in (Ba0.5Sr0.5)TiO3 thin films on leakage current behaviors of Pt/(Ba0.5Sr0.5)TiO3/Pt capacitors were investigated. The leakage current level was found to reduce significantly after the doping over a wide range of voltages and temperatures. The leakage current in an undoped capacitor was lar…
The synthesis and characterization of five homologous series of symmetrical compounds composed of banana-shaped molecules containing a biphenyl moiety are reported. All these compounds are non-Schiff's bases and are esters. The effects of lateral substituents such as fluoro, methyl and ethyl in the side arms of these…
We report on the micromagnetic properties of highly regular hexagonal arrays of Ni nanowires, fabricated by means of electrodeposition in self-ordered porous alumina. Arrays with interpore distances of 65 and 100 nm and pore diameters of 25 and 30 nm are investigated. From hysteresis loops obtained from measurements w…
Cobalt doped zinc oxide films Zn/sub 1-x/Co/sub x/O with the atomic fraction x in the range 0.035-0.115 were prepared by sputtering from composite ZnO/Co/sub 3/O/sub 4/ targets. X-ray diffraction pattern shows the ZnO phase with [002] preferential orientation. Magnetic measurements show ferromagnetic behavior with Cur…
Abstract Moisture diffusion was studied through vinyl ester samples containing up to 5 wt% of organically treated montmorillonite. Two different kinds of clay surface treatment were employed to make the clay compatible with Derakane TM 411‐350 vinyl ester resin. The nanocomposites were characterized using differential…
X-ray powder data originally published for the zeolite mineral goosecreekite are of poor quality. The new data reported here for material from Norway are compared with powder data calculated from the published structure. The cell is monoclinic (space group P 2 1 , Z =2), a =7.422(2) Å, b =17.414(4) Å, c =7.288(2) Å, β…
A measuring system for investigation of the anisotropy of electrical steel is proposed. Both anisotropy of the whole sample and surface distribution of anisotropy can be determined. A sample of electrical steel in the form of a sheet was magnetized by a rotating yoke and the local value of magnetic field strength was…
The microstructure and the microchemistry of Sm(Co,Fe,Cu,Zr)/sub z/ permanent magnets determine the domain wall pinning behavior. This work combines nanoanalytical investigations of the precipitation structure with micromagnetic simulations. A cellular precipitation structure, provides pinning centers. Measurements of…
Abstract At first glance the molecular weight distributions (MWDs) of suspension and emulsion grade PVC are very similar. However, studying the MWDs for both polymerization technologies in more detail reveals systematic differences that can be explained by the differences in the polymerization processes. The MWD of co…
The inhibition efficiency of a series of organic compounds against corrosion of magnesium alloy AZ91 in a 50 wt.-% aqueous solutions of ethylene glycol has been studied using polarisation curves and electrochemical noise (ECN) measurements. The comparative analysis of the results obtained has demonstrated unambiguousl…
Abstract A wide range of polymers has been used for wire and cable insulation. Older materials include natural, butyl, and styrene-butadiene rubber. Newer materials include crosslinked polyethylene, silicone rubber, ethylene-propylene elastomers, and thermoplastic elastomers. Properties of importance to electrical ins…
The effect of postsintering annealing on the dielectric and piezoelectric responses in lead–zinc–niobate (PZN)-based ferroelectric ceramics was systematically studied in this work. Sintered PZN ceramics with the same composition were annealed at temperatures from 700 to 900 °C from 30 min to 24 h in various atmosphere…
Photostimulated nonlinear optical effects in synthesized PbO–Ga2O3–Bi2O3–CdO (PGBC) glasses doped by Yb3+, Er3+, and Dy3+ rare-earth (RE3+) ions were discovered. Temperature-dependent measurements of optical photoinduced second-harmonic generation (PISHG) and two-photon absorption were performed in the infrared (IR) r…
We present dark conductivity, photoconductivity, and transient photoconductivity measurements of the organic salt 4-N,N-dimethylamino-4′-N′-methyl stilbazolium tosylate (DAST). By correlating these measurements to microscopic structural properties including both molecular orientation and intermolecular interactions, w…
Single phase TiO2 thin films, of either rutile or anatase structure, have been prepared on SrTiO3(STO)(100) substrates by in situ pulsed laser deposition (PLD). Thermodynamically unfavorable, for films deposited on STO(100) substrate directly, pure anatase TiO2(00l) films were formed even when a rutile TiO2(110) subst…