Materials Literature
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A novel 18-crown-6 substituted phthalocyanine was synthesized. LB films of this material were prepared by a vertical dipping method and the structures of the films were characterized by absorption spectra, polarized absorption spectra and X-ray diffraction experiments. The results indicate that the films possess highl…
The electronic properties of Nb substitutional impurities in the bulk phase and at the (110) surface of TiO2 are studied by means of density functional cluster calculations. Both the neutral (Nb4+) and the singly ionized (Nb5+) impurity charge states are taken into consideration. Nb is found to introduce a shallow don…
Controlled, plasma-mediated, surface modification of various substrates including inorganic and organic polymers is essential for the creation of miniaturized advanced materials. Many of these approaches have focused on the surface-implantation of specific chemical groups which can be employed for subsequent chemical…
By collating data published over a 30 year period, this text summarizes the progress made in the fields of diffusion and defect research. The large number of studies of iron alloys reflects the commercial importance of hydrogen embrittlement, an phenomenon which has long plagued steel fabricators. Another metal which…
The present paper focuses on vibration analysis for periodic diagnostic testing of circuit breakers. Initially, the basic ideas and the applied procedures are briefly outlined. Then the features of this method are evaluated with basis in the prevailing failure modes according to the CIGRE surveys. Commercial test equi…
The influence of the particle size on the thermal decomposition of ε-hexanitrohexaazaisowurtzitane (HNIW) was studied by means of differential scanning calorimetry (DSC). The kinetics and mechanism for the decomposition were evaluated using integral methods. It was found that the thermal kinetic parameters such as act…
In order to enhance the anisotropy of Nd-Fe-B HDDR treated powder, we have investigated the hydrogen pressure dependence of the recombination reaction temperature, for disproportionated Nd2Fe14B powder. The recombination pressure of hydrogen was higher than the dissociation pressure of NdH2. The addition of Co and/or…
The distribution of elements and chemical state of aluminum along the growth direction of a siliceous deposit formed from geothermal water at the Hachobaru geothermal power station were examined by chemical analysis and 27Al MAS NMR. The content of 4-coordinated Al, Al(4), was essentially constant along the growth dir…
Powder neutron diffraction measurements have been made at 2 and 20 K for the complex cis-[ReCl4(NHCMeNHPh)2]. The changes in diffracted intensities on magnetic ordering at 9.7(1) K were fitted in the Shubnikov group Pc′c′n to an antiferromagnetically ordered magnetic structure in which the spins are aligned along c in…
Relating Materials Properties to Structure: Handbook and Software for Polymer Calculations and Materials Properties lays the foundation for an understanding of the basic structure of materials and the significant distinguishing features between major classes. It provides a method of comparison between the structure of…
Investigation of Keggin ion salts prepared by partial hydrolysis of Al3+ and Fe3+ ions followed by addition of sodium sulfate solution to generate the sulfate salt of the Keggin ion was carried out. Characterization of the salts was performed by classical analytical methods and FTIR and XP spectroscopy. Incorporation…
In order to determine feasibility of SF/sub 6/ gas insulated equipment for HVDC substation technology, a testpole was built and subjected to a long term test of 2 years. The test pole consisted of slightly modified commercially available 550 kV AC and 800 kV AC gas insulated components. The components were SF/sub 6/-a…
An investigation into the structure of three metaphosphate glasses, Mg(PO3)2, Zn(PO3)2 and Pb(PO3)2, using molecular dynamics simulations is presented. The phosphate network was found to consist of long linear chains of PO4 tetrahedral units. This type of structure exists in the three metaphosphate glasses, indicating…
This paper discusses the results of partial discharge measurements in medium voltage power cables losing oscillating test voltages. In particular, the sensitivity and the reproducibility of this new method for on-site testing are discussed. Based on laboratory and on-site tests the usefulness of this PD measuring tech…
Abstract A study was conducted to identity factors contributing to the difficult removal of used motor oil from textile materials by detergency. Infrared spectroscopy and gel permeation chromatography of used motor oil showed that the oil was a saturated aliphatic hydrocarbon with molecular weight around 950. X‐ray an…
Abstract The development of Cyclotella ocellata P antocsek was studied systematically in the eutrophic, dimictic hardwater Lake Dagow from March to October, 1994. Cyclotella ocellata was the most important centric diatom in the lake with a maximum cell density of 6 × 10 6 cells 1 −1 . The seasonal development, charact…
This paper deals with the irradiation behavior of the oxide dispersion strengthened (ODS) ferritic alloy DT2203Y05, a 13% Cr ferritic alloy strengthened by a fine dispersion of yttrium and titanium oxides. This alloy was irradiated up to 81 dpa in Phénix as fuel pin cladding. The profilometry measurements confirm its…
Research Article| August 01, 1999 Shocking rocks by cavitation and bubble implosion John G. Spray John G. Spray 1Impact Geology Group, Department of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (8): 695–6…
Chemical or electrochemical oxidation of substituted dithieno[3,4-b:3′,4′-d]thiophenes provides polymers with defined regiochemical structures. These materials have lower bandgaps (0.7-0.9 eV) than the unsubstituted fused heteroarene. Potential cycling of the 1,3-dimethyl substituted polymer film shows repetitive p- a…
A novel conjugated polymer containing carboxylic acid and 2-[2-(2-methoxyethoxy)ethoxy]ethoxy substituents which is soluble in both organic solvents and aqueous bases is synthesized.