Materials Literature
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A simple method for measuring the ceramic-ceramic and metal-ceramic bond strength was presented, by which uniaxial tensile stress normal to the interface or shear stress in the interface can be produced using uniaxial compression load on a cross-bonded sample. Both tensile and shear bond strength were obtained by this…
Abstract This paper proposes a simplified mathematical and tabular method for assessing the risk of exothermic runaway reactions, based on the calculated hazard index. Intrinsic elements, such as reactivity, stability, exothermic enthalpy, etc., are presented as measures of severity of a potential runaway event. Simil…
The phase relationships in the CaHfTi 2 O 7 ‐Gd 2 Ti 2 O 7 (zirconolite‐pyrochlore) pseudobinary system were investigated, after heating at 1500°C, because of their importance in the design of pyrochlore‐rich titanate ceramics for immobilization of impure surplus plutonium. Up to 15 mol% of MgTi 2 O 5 and Al 2 TiO 5 w…
LU2O7S12, monoclinic, C\Um\ (No. 12), a = 6.762(2) , b = 8.835(3) , c = 4.711(2) k, = 101.99(4), V= 275.3 3 , = 2, Rgf(F) = 0.019, wRretfF 2 ) = 0.045, T= 293 K.
Abstract The temperature dependencies (10‐300 K) of seven Raman‐active mode frequencies in layered semiconductor gallium telluride have been measured in the frequency range from 25 to 300 cm ‐1 . Softening and broadening of the optical phonon lines are observed with increasing temperature. Comparison between the exper…
Based on the metals property of modifying the phase of an incident beam, a simple method for identifying the fast axis of a wave plate independent of a standard retarder is demonstrated. © 2002 Society
Abstract The dependence of the attenuation of both gamma rays and neutrons on lead concentration in leaded‐natural rubber composites incorporated with paraffin wax and boron carbide as radiation shields was investigated. Moreover, the dc conductivity and swelling characteristics of the rubber vulcanizates and the effe…
Abstract Two catena manganese carboxylato complexes [{Mn[m-C6H4(COO)2](C5H5N)2}n] (1) and [{Mn(3-C5H4NCO-O)2}n] (2) were synthesized and structurally characterized. Isophthalate together with pyridine as a capping ligand leads to a 1-D alternating chain structure of complex 1, while 3-pyridinecarboxylate (also known a…
Rubber ferrite composites (RFCs) containing powdered nickel zinc ferrite (Ni1 - xZnxFe2O4 ) in a natural rubber matrix have been prepared and their mechanical and dielectric properties have been evaluated. Variations in the relative permittivity of both the ferrite ceramics and RFCs have been studied over a range of f…
ABSTRACT Silk apparatus of the funnel‐web spider, Agelena limbata was located at the ventral end of the abdominal part, and was composed of internal silk glands and external spinnerets. Among the three pairs of spinnerets, the posterior pairs were highly elongated along the body axis. By the light and electron microsc…
Abstract Much attention has been recently focussed on the melt impregnation of thermoplastic polymers as a consequence of the difficulty involved in driving viscous polymer melt into a tightly packed fiber bundle. This work studies an impregnation process consisting a series of staggered cylindrical pins in a melt poo…
Abstract The mainstream smoke filtration performance of activated carbon, silica gel and polymeric aromatic resins for gas-phase components was evaluated using a puff-by-puff multiplex gas chromatography-mass spectrometry (GC-MS) analysis method (1). The sample 1R4F Kentucky reference cigarettes were modified by placi…
Six components were isolated from the stems of Ecdysanthera rosea. On the basis of spectra analysis, they were identified as 5-O-caffeoylquinic acid (1), methyl 5-O-caffeoyl quinate (2), butyl 5-O-caffeoyl quinate (3), scopoletin (4), β-sitisterol (5), and β-sitisterol glycoside (6). 5-Ocaffeoylquinic acid (1) is the…
A normal-incidence single-exposure scheme to obtain a stable pretilted alignment of nematic liquid crystals on photo-alignment polymer layers is proposed. The new scheme consists in periodically modulating the intensity of the normally incident linearly polarized near-ultraviolet light and unidirectionally scanning it…
The epiphytic diatom communities living on two macroalgae, Chara vulgaris L. and Cladophora glomerata Kütz.) and one angiosperm Potamogeton densus L., were collected in the Mediterranean river Durance. Each macrophyte species was studied on the basis of three plant replicates, each of which cut into three segments. Al…
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This paper presents an improved optical design for the LSST, an f/1.25 three-mirror telescope covering 3.0 degrees full field angle, with 6.9 m effective aperture diameter. The telescope operates at five wavelength bands spanning 386.5 nm to 1040 nm (B, V, R, I and Z). For all bands, 80% of the polychromatic diffracte…
The dehydration of Ca(SCN) 2 ∙4H 2 O yields single crystals of Ca(SCN) 2 ∙ 2 H 2 O as well as of Ca(SCN) 2 . Ca(SCN) 2 ∙ 2 H 2 O crystallizes with a hitherto unknown structure (orthorhombic, Pnma, Z = 4, a = 1280.1(2), b = 790.3(1), c = 726.9(1) pm, R all = 0.0430). The Ca 2+ ions are surrounded by four SCN − ions and…
In this paper, we studied partial discharge (PD) inception characteristics and V-t characteristics of PD inception in liquid nitrogen (LN/sub 2/)/polypropylene laminated paper (PPLP/sup /spl reg//) composite insulation system for high temperature superconducting (HTS) cable. Experimental results revealed that the magn…
The protonated molecules and radical cations of meso-tetraphenylporphyrins with beta-pyrrolic substituents, when formed by fast atom bombardment (FAB) and subjected to high-energy collisions, give rise to unexpected fragment ions. The reaction involves hydrogen migration from the ortho position of the phenyl ring to t…