Materials Literature
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The anisotropy field, coercivity and saturation magnetization in a Mn-Al-C permanent magnet were measured as a function of temperature from 4.2K to 300K. The coercivities in both the easy and hard directions were found to decrease linearly with temperature with slightly different slopes. The coercivities measured with…
Chrysophycean statospores identical to Chrysastrella furcata (Dolg.) Defl. of the ‘Chrysostomataceae’ have been found in Ontario lakes. Vegetative cells with 2–5 simple or forked spines of the type characterizing the statospore were discovered in West Twin Lake, Ontario in the early spring of 1979 and apparently repre…
Abstract The activated anionic polymerization of ε‐caprolactam in presence of LiCl (up to 10 wt.‐%) is studied under quasi‐adiabatic conditions. The temperature increase of the system, after proper corrections for the heat exchange with the surroundings, allows to evaluate the enthalpies of polymerization δ H p and to…
Abstract The stepwise thermal degradation of a polybenzimidazole (PBI) foam, prepared from 3,3′‐diaminobenzidine and isophthaldiamide, has been studied under conditions of pyrolysis and nonflaming oxidative degradation in a thermal analyzer using gas and liquid chromatographic separation and mass spectrometric and inf…
Abstract The kinetics of the reaction between steam and spent activated carbon (from sucrose deposition) was studied at 1003 to 1123 K and 1 atm pressure. At these conditions some virgin carbon, upon which the sucrose was originally adsorbed, was also gasified. Rates of oxidation were essentially the same for spent an…
EPR data for Mn 2+ in Cs 2 ZnBr 4 , Rb 3 ZnBr 5 , Cs 3 CdBr 5 and [(CH 3 ) 4 N] 2 ZnBr 4 single crystals were determined and the crystal structures of Rb 3 ZnBr 5 and Cs 2 ZnBr 4 were refined. Superposition analysis of the fine structure data for the latter two compounds resulted in an intrinsic zero field splitting p…
Abstract Flint clay is kaolinitic mudstone that distinctively differs from widely known shale in lithology, genesis, and economic uses. Flint clay is described as a fine-grained, compact, non-fissile, essentially monomineralic kaolinitic rock that breaks with a conchoidal ("flinty") fracture, has almost no natural pla…
Abstract The lamellar crystalline structure of styrene/ε‐caprolactone block copolymers (SCL) of different compositions and molecular weights is studied by X‐ray diffraction and differential scanning calorimetry. The studies were performed in the absence and in the presence of diethyl phthalate, a preferential solvent…
Superficially oxidized cesium antimonide photoemitting surfaces prepared in ultrahigh vacuum were studied by x-ray photoelectron spectroscopy. Oxidation of Cs3Sb to produce a surface with enhanced photosensitivity converts part of the antimony to elemental antimony and part of the cesium to cesium suboxide. The latter…
The formation energy, the deviation of the lattice parameter from Vegard's law and the bulk modulus of Fe-base and Ni-base 3d transition metal alloys, are calculated on the basis of the two-band model and the virial theorem. The results are in good agreement with the experimental values and are interpreted with three…
An amorphous WO 3 electrochromic display device (a-WO 3 ECD) employing a solid proton conductor was investigated. The resistivity of the solid proton conductor composed of p-toluenesulfonic acid (p-TsOH) and urea (1.2:1 in molar ratio) was 10 2 ∼10 3 Ω cm at a relative humidity of 60% (20°C). The a-WO 3 ECD using the…
Neutron diffraction studies of eleven compounds across the compositional range of the Y6(Fe1−xMnx)23 system reveal the presence of substantial preferential atomic ordering of Fe and Mn atoms on the four transition metal crystallographic sites. Throughout the entire compositional range, Mn atoms prefer to occupy the f2…
The permeation of toluene and N,N-dimethylformamide through three types of protective clothing was measured according to a proposed standard method of the American Society for Testing and Materials. Preliminary test data from two independent laboratories indicate that the method requires careful selection of specific,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-nitroxyl interactions. 20. Electron paramagnetic resonance spectra of spin-labeled vanadyl and silver porphyrinsKundalika M. More, Sandra S. Eaton, and Gareth R. EatonCite this: J. Am. Chem. Soc. 1981, 103, 5, 1087–1090Publication Date (Print):March 1, 1981Publication…
Abstract The system of calcium oxide and water vapor was studied using the transpiration method. Under the conditions of a temperature range from 1678 to 2016 K and PH2O values from 1.2×10−2 to 4.7×10−1 atm, the predominant reaction in this system was found to be CaO(s)+H2O(g)=Ca(OH)2(g). The standard Gibbs free energ…
A low oxygen processing technique was developed for the manufacture of SmCo5 and temperature compensated magnets. Improvement in the magnetic field orientation monitored by Schulz pole figure technique and the controlled oxygen processing resulted in SmCo5 magnets with energy products of 25–28 MGOe. The temperature de…
The effect of beef carcass electrical stimulation on the thermal stability of intramuscular collagen was determined. Differential scanning calorimetric determinations of thermal shrinkage temperature revealed that electrical stimulation lowered the shrinkage temperature of collagen by an average of .6 C in the populat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure determinations of halotetrakis(tert-butyl isocyanide)((N,N'-di-tert-butyldiamino)acetylene)molybdenum(II) complexesPeter W. R. Corfield, Laima M. Baltusis, and Stephen J. LippardCite this: Inorg. Chem. 1981, 20, 3, 922–929Publication Date (Print):March 1, 1981Publi…
The response of a spherical bubble in an inviscid compressible liquid is studied for five different bubble models. It is shown that the qualitative behavior of the models is essentially the same, even under intense cavitation conditions. The quantitative behavior is similar, especially for low Mach numbers.
Abstract AgCo 3 H 2 (AsO 4 ) 3 ( 1 ) und AgZn 3 H 2 (AsO 4 ) 3 ( 2 ) wurden durch Erhitzen eines Gemisches von As 2 O 5 , AgNO 3 , CoSO 4 · 7H 2 O bzw. ZnSO 4 · 7H 2 O und Wasser auf 300°C im Autoklaven dargestellt und röntgenographisch untersucht. Beide Verbindungen sind isotyp und kristallisieren in der monoklinen R…