Materials Literature
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Metallic fuels containing minor actinides and rare earth additions have been fabricated and are prepared for irradiation in the ATR, scheduled to begin during the summer of 2007. Oxide fuels containing minor actinides are being fabricated and will be ready for irradiation in ATR, scheduled to begin during the summer o…
The thermal decompositions of unirradiated and γ-irradiated Ru(acac) 3 were studied in air. The results show that decomposition proceeds in one major step in the temperature range of 150-250°C with the formation of RuO 2 as a final solid residue for unirradiated Ru(acac) 3 . For γ-irradiated Ru(acac) 3 , with a total…
Abstract A fossil freshwater diatom species, Thalassiosira inlandica sp. nov., is described from Pleistocene lacustrine sediments of the Kathmandu Basin on the southern slope of the Nepal Himalaya. Thalassiosira inlandica is characterized by (1) a nonplicated (flat) valve face, (2) networks of ribs and costae, (3) sem…
Using an integrated measurement system, partial discharge activity has been recorded simultaneously on a pulse-by-pulse basis in terms of radiated radio-frequency (RF) pulse energy and the apparent charge measured according to IEC60270. Plotting the energy of the RF pulses against the corresponding apparent charge pro…
The electrical characteristic of twisted pair specimen for high-power inverter-fed motor has been addressed through aging tests under PWM-like voltage waveform in this paper. Partial discharge (PD) parameters (e.g., phase resolved PD pattern, skewness) for twisted pair specimens at different aging time are investigate…
Multilayered [NdFeB x /Tb y ] n films were prepared by a three-demensional sputtering system. From the thickness of NdFeB layer dependence on the orientation and magnetic properties of multilayered [NdFeB ( x µm)/Tb (50 nm)] n films with 7.2 µm as a total thickness of NdFeB layers, it was found that the orientation of…
Nanohole arrays with a sub-30 nm diameter were formed on GaAs substrates by inductively coupled plasma reactive-ion etching (ICP-RIE) using nanoporous alumina films as transfer masks. Whether the pore configurations of the alumina masks were transferred onto the GaAs substrates depended on the exposure time of ICP-RIE…
OBJECTIVE: To investigate the chemical constituents of the root barks of Periploca sepium. METHOD: Column chromatographic techniques were used to isolate the chemical constituents. NMR and MS methods were employed for their structural elucidation. RESULT: Eight compounds were isolated and identified as isovanillin (1)…
Analytic expressions for the entropy of a ferromagnet and an antiferromagnet that make it possible to calculate the magnetic-field dependence of the entropy in a wide temperature range have been obtained in the mean-field approximation for the Heisenberg model. It has been shown that for Fe, Ni, and Gd the calculated…
We investigated new triode-type field emission arrays (FEAs) and an appropriate driving method in a lower plane (cathode plate) for a flat lamp applicable to backlight units (BLUs) in liquid crystal display (LCD). The proposed triode-type FEAs were designed with a gate and cathode on the same lower plane without disti…
Based on shape memory effect of the sputtered thin film shape memory alloys, different types of micromirror structures were designed and fabricated for optical sensing application. Using surface micromachining, TiNi membrane mirror structure has been fabricated, which can be actuated based on intrinsic two-way shape m…
Ethylene vinyl acetate (EVA) provides, potentially, a novel material for inclusion into high voltage cable insulation providing a degree of electrical conductivity, whilst at the same time avoiding the dispersion problems associated with conventional conducting polymers and fillers. Although this can decrease the diel…
The fractions of aluminium, [Al]/[Al + Si], and oxygen, [O]/[O + N], in crystallographically distinct sites of BaYb[Si 4– x Al x O x N 7– x ] oxonitridoaluminosilicate (space group P 6 3 mc , No. 186) were refined based on the results of neutron powder diffraction for a synthetic sample with the composition of x = 2.2…
Poly(N‐vinyl‐2‐pyrolidone) protected Pt‐core bimetallic Pt/Au‐shell (Pt@Pt/Au) nanoparticles were prepared by multi‐step reduction of HAuCl4 and H2PtCl6 alternately by hydrogen adsorbed on platinum atom. Transmission electronic microscopy (TEM) and x‐ray diffraction (XRD) were used to characterize Pt@Pt/Au nanoparticl…
This paper reports that the intergrowth ceramics Bi 5 TiNb WO 15 (BW-BTN) have been prepared with the conventional solid-state reaction method. The dielectric and conductivity properties of samples were studied by using the dielectric relaxation and AC impedance spectroscopy in detail. Two distinct relaxation mechanis…
Fullerene+iron (C60+Fe) mixture plasmas were produced and studied in the ECR ion source of ATOMKI. The two main components of the plasma were obtained by different filament ovens. In this series of measurements we concentrated on the maximum ratio of C58 (damaged fullerene) in the plasma. C58 is less stable than C60 a…
The adsorption and thermal reactivity of NO and CO over an Ir(211) surface were studied using x-ray photoelectron spectroscopy, infrared reflection absorption spectroscopy, and temperature-programed desorption. NO adsorbed on the atop site of the (111) terrace and the bridge site of the (100) step at 273K. In contrast…
Vamac GR is generally cured by amine curative systems but in some cases peroxide is also used. Here both the curative systems amine (DPG and MDA) as well as peroxide (Varox DCP 40C) have been used. Mixing with different nanofillers in the presence of different curative systems is expected to improve interchain cross-l…
Nanoporous titania was obtained by anodic oxidation of magnetron deposited aluminum–titanium alloy films with subsequent alumina etching. This method has the merit of low temperature operation. The porosity of the titania film obtained can be controlled by the titanium concentration in the alloy. These nanoporous tita…
The surfaces of three kinds of polymer were treated using pulsed oxygen plasma: poly(ether ether ketone) (PEEK), liquid crystalline polymer (LCP), and linear-low-density polyethylene (L-LDPE). Also using pulsed oxygen plasma, oxygen functional groups were introduced on polymer surfaces. The effects of oxygen functiona…