Materials Literature
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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…
A solid‐state reaction process has been developed to synthesize perovskite‐type LaCoO 3 nanocrystals with grain diameters of 15–40 nm. In the first step of the preparation, ∼5 nm composite hydroxide nanoparticles are synthesized by the solid‐state reaction of La(NO 3 ) 3 · n H 2 O and Co(NO 3 ) 2 ·6H 2 O with KOH at a…
It is believed that the moisture that is inherently present in nondried wood-fibers adversely affects the cell morphology of plastic/wood-fiber composite foams processed in extrusion. Based on this hypothesis, achieving a continuous extrusion-based production of fine-celled plastic/wood-fiber composite foams witha des…
Abstract Fatigue tests on ethylene propylene (EPDM) and styrene-butadiene (SBR) rubber reveal physical behavior that is not seen in conventional linear elastic solids. Uniaxial cyclical tests, using cylindrical dumbbell specimens, with the same minimum stress of zero ( S min =0 ) and varying stress amplitude ( s a ),…
Electrical properties of CeO 2 thin films of different Y 2 O 3 dopant concentration as prepared earlier were studied using impedance spectroscopy. The ionic conductivities of the films were found to be dominated by grain boundaries of high conductivity as compared with that of the bulk ceramic of the same dopant conce…
Here we found that dielectric measurement can be a sensitive probe to detect the behavior of electrons and electron-spin interaction in a strongly electron-correlated system. The CuO single crystal samples with and without excess holes were investigated by dielectric measurements in combination with magnetic susceptib…
Nd-substituted Sr hexaferrite (Sr/sub 1-x/Nd/sub x/Fe/sub 12/O/sub 19/) plate-like particles were synthesized hydrothermally and then calcined at temperatures ranging from 1100/spl deg/C to 1250/spl deg/C for 2 h in air. The effects of the Nd-Sr ratio and the calcination temperature on the phase stability and magnetic…
Effect of different modes of rolling deformation and its role in the development of crystallographic texture has been studied for pure Cu, and Cu(Cr) and Cu(P) alloys with a view to obtain a very fine grained microstructure and very weak texture after annealing. Results indicate that textures developed after unidirect…
Understanding of the mechanisms that affect flow and pressure drop in porous ceramic diesel particulate filters is important in the design optimization of this class of diesel exhaust after- treatment systems. Furthermore, determination of the parameters involved in the calculation of pressure drop as a function of co…