Materials Literature
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The propagation of electromagnetic waves in layered conductors in a quantizing magnetic field B is investigated theoretically in the case where elastic scattering by short-range impurity centers is the main relaxation mechanism in the electronic system. Quantum oscillations of the impedance, including at high temperat…
Some insulating structures of Mo/Al2O3cermet - Al2O3ceramic - Mo/Al2O3cermet were prepared to improve surface flashover performance in vacuum through co-firing, where the volume amount of Mo was managed from 2 to 50 vol% and there could exist one or two layers with different Mo amount in Mo/Al2O3cermet. The influences…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
A new system for studying electrical properties of cell suspension is presented, which is based on the piezoelectric pressure wave propagation (Piezo-PWP) method. Because of the introduction of ultrasound to the system, the biological effects of ultrasound must be considered. In the experiment, the most important impa…
Barium titanate (BaTiO3, BT) grain-oriented ceramics along [110] direction were prepared by a templated grain growth (TGG) method. The [110] oriented BT platelike particles (t-BT) were used as template particles. BT grain-oriented ceramics with higher relative density (Drel) over 95 %, high degree of orientation along…
. La1-xCexCoO3 (x=0, 0.2, and 0.4) perovskite-type mixed oxides using polyvinyl alcohol (PVA) as complexing agent at two molar ratio of metal ion to PVA (1:1 and 1:2) were successfully prepared by sol-gel process. The precursor included lanthanum (II) nitrate hexahydrate, cerium (II) nitrate hexahydrate, and cobalt (I…
The monostatic radar cross section (RCS) hot-spot characteristics of electrically large grooved structures were analyzed. The structures' monostatic RCS and inverse synthetic aperture radar (ISAR) image properties at X-band were characterized for the far-field. These structures were assumed to have perfect electric co…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
A new grain refinement method, electromagnetic suspension casting, has been proposed, which is based on the virtues of the electromagnetic stirring and the suspension casting. The experiments on AZ61 wrought magnesium alloy by electromagnetic suspension casting were investigated. The results show that the grains were…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
The present study adopts proton irradiation to solve the problems, such as performance degradation due to outgassing and weak adhesion, of a carbon nanotube (CNT) field emitter fabricated by the indirect coating method. The protons collide against the CNT layer and the copper film, and results in thinning out of the C…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
The lithium ion conducting properties of lithium- and MⅣ (M = Al, In, Y)-doped zirconium pyrophosphates synthesized via solid state reaction were investigated. The ionic conductivity of the compounds increased with increasing Li content. The activation energy of LixMxZr1-xP2O7 decreased as the lattice parameter increa…
This paper presents a dissipated force measuring set for testing of the soft body armor type II-A. This type of armor protects against 9 mm full metal jacketed round nose (FMJ RN) bullets, with nominal masses of 8.0 g, impacting at a minimum velocity of 341 m/s. The impact absorber area of the measuring set is about 2…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
Applying the molecular dynamic simulation, we have studied the interaction between two groups of adhesion-proteins and Cu (100) surface by the “double-layer” model. The two groups of proteins are respectively Mefp-1, Mefp-3, Mefp-5, and Mefp-1-Cl, Mefp-3-Cl, Mefp-5-Cl after modification by HOCl. The results show: the…
Ferroelectric ceramic materials have a wide range of applications because of their piezoelectric and pyroelectric properties. One of their most important physical properties is the specific heat. In this study, the specific heats of a series of lead-zirconate-titanate (PZT) compositions in the vicinity of the morphotr…
Spherical carbon nanoparticles were synthesized by sol-gel polymerization of resorcinol and formaldehyde in the presence of CTAB(cetyltrimethylammonium bromide) and subsequent carbonization at 900°C. It is found that the amount of CTAB, water and catalyst showed a significant impact on the morphology and size of carbo…
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
The composite of silicon carbide with nickel and lead oxide was prepared by reaction sintered method. The phase compositions of the composites were studied by XRD, SEM and EDX. Friction and wear properties of the composites in dry conditions at the temperatures 15°C, 300°C and 600°C were tested using a pin-on-disk tri…