Materials Literature
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The core loss mechanism of low loss grade Mn-Zn ferrite in the frequency range from 1 MHz to 10 MHz was investigated. Under the condition of f.B=25 kHz. T, it was found that dielectric loss dominated the core loss at frequencies between 1.1 and 3 MHz, while eddy current loss dominated the core loss at frequencies high…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzastannatranes: synthesis and structural characterizationWinfried Plass and John G. VerkadeCite this: Inorg. Chem. 1993, 32, 23, 5145–5152Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs…
The effect of annealing on the coercivity /sub j/H/sub c/ of sintered Nd-Fe-B is contradictorily discussed in literature, /sub j/H/sub c/ depends on annealing temperature T/sub A/, annealing time, cooling rate, and details of the chemical composition. In the case of (Nd,Dy)/sub 15/(Fe,Co,Mo,Al)/sub 77/B/sub 8/ a decre…
Abstract Poly(arylene ether)s containing N‐arylenebenzimidazole groups were prepared by the aromatic nucleophilic displacement reaction of two new bis(hydroxyphenyl‐N‐arylenebenzimidazole)s with activated aromatic difluorides in sulfolane at 200°C in the presence of anhydrous potassium carbonate. The bis(hydroxyphenyl…
Abstract Influences of nitrile rubber (NBR, acrylonitrile content 33.5 – 36.5 wt.‐%) on the structure and mechanical properties of poly(vinyl chloride) (PVC)/low density polyethylene (LDPE) blends and its synergism with crosslinking agent have been studied. The addition of NBR to the blend is accompanied by a decrease…
The materials which are applied in modern motor vehicles can be considered to be optimally accommodated to the actual demands. Normally a change of materials is only required if by that a cost reduction can be realized, or if the demands change. Such changes at present or in the near future mainly concern ecological a…
Abstract A structured‐geometry model for dispersed and graded deposits was developed for chemical vapor infiltration of multiply‐woven substrates of carbon filters. An earlier model was modified to allow for two reactants in the feed. The model predicts gas‐phase concentration profiles in the voids of substrates and d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThioether binding of manganese oxidation states. Chemistry of an MnII,IIIS2N2O2 familyPartha Chakraborty, Swapan Kumar Chandra, and Animesh ChakravortyCite this: Inorg. Chem. 1993, 32, 23, 5349–5353Publication Date (Print):November 1, 1993Publication History Published online…
Semi-solid processing (SSP) of alloys has been used commercially since the early eighties for the manufacture of components in the automobile and aerospace industries. The thrust of the early development has been in aluminium and copper alloys. The nature of the process makes it an ideal candidate for the manufacture…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimerization of cyanine dyes in water driven by association with hydrophobic borate anionsBruce Armitage, Jennifer Retterer, and David F. O'BrienCite this: J. Am. Chem. Soc. 1993, 115, 23, 10786–10790Publication Date (Print):November 1, 1993Publication History Published onli…
Submcrometer‐scale magnesium nitride (Mg 3 N 2 ) powder was prepared by low‐pressure chemical vapor deposition, i.e., the reaction of Mg vapor with mixed NH 3 –N 2 gases at 800°C under a pressure of ∼1 kPa. The mixing ratios of NH 3 –N 2 gases were 0% NH 3 –100% N 2 (pure N 2 ), 20% NH 3 –80% N 2 , 40% NH 3 –60% N 2 ,…
The time-of-flight spectrum of high-frequency phonons with both anharmonic decay and mass-defect (isotope) scattering is studied numerically for silicon. For the quantitative description of the spectrum in the whole time domain (from t\ensuremath{\simeq}${\mathit{t}}_{\mathit{b}}$ to t\ensuremath{\gg}${\mathit{t}}_{\m…
The influence of fiber/matrix interactions on the mechanical behavior of ceramic matrix composites is examined on glass matrix composites and mainly on composites made by chemical vapor infiltration (CVI) of a fiber preform by a SiC matrix. Then the relationships between interfaces and features of the stress-strain be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of hexakis(trimethylsilyl)digermane and -distannaneSiva P. Mallela and R. A. GeanangelCite this: Inorg. Chem. 1993, 32, 24, 5623–5625Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 Nove…
The technique of laser-assisted molecular-beam deposition (LAMBD) has been used to fabricate a molecular film by reaction in a molecular beam. Molecular iodine vapor entrained into a stream of helium carrier gas was introduced via a supersonic expansion into the plasma plume of laser-evaporated copper to produce coppe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel pendant-type macrocyclic bifunctional chelating agents: (carboxymethyl)amino derivatives of 2-(4-nitrobenzyl)-1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid and their complex formation with yttrium(III)Kazuya Takenouchi, Masayasu Tabe, Kenzo Watanabe, At…
Small, well‐ordered CdS semiconductor units are present in the aluminate sodalite 1 as indicated by a significant blue shift of the UV/VIS absorption edge relative to that of bulk (macrocrystalline) CdS. The spectroscopic properties of CdS in 1 are thus similar to those of colloidal cadmium sulfide, although the indiv…
ABSTRACT Permeability of air through porous pre‐gelatinized flour dough was measured as a function of porosity (0.10–0.60), moisture content (15–50%, wet basis), and fat content (0–6%). At free stream velocities <2 cm/sec, flow rate and pressure drop followed Darcy's law for flow through porous media. Permeability…
Abstract A reduced time approach has been used to predict nonisothermal curing kinetics based on isothermal kinetic data. This approach makes it clear that the conversion in a kinetic process is a function of the reduced time alone and allows for the construction of a master curve from isothermal kinetic data, indicat…
Interdiffusion coefficients in the β-phase of Ti-Si, Ti-Ge and Ti-Sn alloys have been determined by Matano's method in the temperature range between 1173 and 1823 K with (pure Ti)-(Ti-102 at.%Si alloy), (pure Ti)-(Ti-2.00at.% Ge alloy) and (pure Ti)-(Ti-1-65at.%Sn alloy) couples. By extrapolating the concentration dep…