Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFour compounds containing oxo-centered trivanadium cores surrounded by six .mu.,.eta.2-carboxylato groupsF. Albert Cotton, Michael W. Extine, Larry R. Falvello, Diane Beck Lewis, Gregg E. Lewis, Carlos A. Murillo, Willi Schwotzer, Milagros Tomas, and Jan M. TroupCite this: I…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitric oxide reduction by carbon monoxide over noble-metal catalysts under cycled feedstreamsHideaki Muraki and Yoshiyasu FujitaniCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 3, 414–419Publication Date (Print):September 1, 1986Publication History Published online1 Ma…
Abstract The origins of multiple peaks observed by differential scanning calorimetry have been examined in detail for a linear polyethylene fraction crystallized from dilute solution and for bulk‐crystallized copolymers of ethylene. At least two major bases are demonstrated. One is melting–recrystallization; the other…
The magnetostrictive properties of cubic Laves phase Tb0.27Dy0.73Fe2prepared by (a) Czochralski and (b) a free standing r.f. zone method, were examined. Crystals were found to grow preferentially along [11\bar{2}] in twinned dendrite sheets with [111] normal. The saturation magnetostriction along [111] is very large (…
Novel polyetherurethaneureas containing tertiary amino groups in the side chains (PAEUU) were synthesized, quaternized with different alkyl halides (Q-PAEUU), and heparinized (H-PAEUU). The antithrombogenicity of PAEUU in vitro was improved by quaternization, and further by heparinization. The excellent antithrombogen…
Small anomalies have been found in the thermal behavior of synthetic ikermanite: (l) a sharp anomaly in the heat capacity at 357.9 K, and (2) a discontinuity in the thermal expansion at 693 K as determined by X-ray diffraction. The enthalpy and entropy assigned to the heat<apacity anomaly, for the purpose of tabulatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic activity and structure of molybdenum trioxide highly dispersed on silicaTakehiko Ono, Masakazu Anpo, and Yutaka KubokawaCite this: J. Phys. Chem. 1986, 90, 20, 4780–4784Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Publishe…
Kinetics of BaTiO 3 and PbTiO 3 formation from metalloorganic precursors were studied. The fine grain size of the decomposed product and the greater degree of mixing led to very rapid kinetics of compound formation. The kinetics data were fitted to the Carter model for a diffusion‐controlled process. Formation of PbTi…
Preliminary experiments have been performed to probe the feasibility of using plasma enhanced chemical vapor deposition (PE–CVD) to prepare electrochromic thin films of tungsten oxide and molybdenum oxide by plasma reaction of WF6, W(CO)6, and Mo(CO)6 with oxygen. Thin films produced in a 300 W, electrodeless, radio-f…
A design method for a low aberration matrix lens is developed. The matrix lens consists of an electrostatic lens array and beam limiting aperture array located outside of the lens array. It is shown that off-axial aberrations, which are dominant in the outer lenses, can be reduced by shifting the aperture from the opt…
The interface problem of light reflection and refraction through a thin dielectric slab is formulated as a pure BVP for the e.m. field in the slab. The resulting difference equation is solved and interference effects for quarter-wave films are discussed.
The activities of MoO 2 in the (Ti,Mo)O 2 solid solution were measured at seven different compositions, using an emf method involving calcia‐stabilized zircoinih as solid electrolyte. In the temperature range studied, 1350 to 1600 K, the activities of MoO 2 show a strong positive deviation from ideal behavior. In addi…
Substitution of cobalt for iron increases the Curie temperature (Tc) of NdFeB alloy but the anisotropy field (HA) and the intrinsic coercivity force (Hci) was found to decrease rapidly [1]. Aluminum was found to be effective in increasing Hciof NdFeCoB alloys. However, aluminum decreases the saturation magnetization (…
This paper reports the effects of grain size on magnetoacoustic emission and magnetic Barkhausen effects in sheets of decarburized steel and on the effects of grain size and carbon content on the bulk magnetic properties of decarburized and low carbon steels. Results show that, although the grain size does affect the…
A technique for characterizing the entire static hysteresis loop using Fourier analysis has been developed. The method goes beyond the familiar listing of saturation moment, squareness, coercivity, and switching field distribution to describe the magnetization process in detail. The essence of the technique is to "unf…
The pore size distributions in random assemblies of equal spheres are obtained from the computer experiments and the theoretical study is made of the results within the framework of the Percus–Yevick approximation.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of a carbon equivalent of iodosylbenzene with iron-porphyrins: a ready access to N-alkylporphyrin complexes involving five-membered [cyclic] Fe-O-C-C-N metallocyclesJean Paul. Battioni, Isabelle. Artaud, Daniel. Dupre, Philippe. Leduc, Irena. Akhrem, Daniel. Mansuy,…
Abstract Samples with an increased content of chloroallyl structures were prepared by chemical degradation of poly(vinyl chloride) (PVC) using potassium tert ‐butoxide. The samples were thermally dehydrochlorinated in an inert atmosphere, and their dehydrochlorination curves were determined by the continuous potentiom…
Thermoluminescence, phosphorescence, and ac conductivity measurements have been performed at room temperature on as-grown or Li-, Na-, and Cu- electrodiffused synthetic quartz, beta or x ray irradiated, to confirm the ionic nature of the charge carriers in the radiation-induced conductivity (RIC). Comparison between R…
After operation of a basic oxygen furnace with a MgO‐C brick lining, formation of a dense MgO layer is observed near the working surface. It is affected by soak atmosphere gas in the first stage of operation. As operation of the furnace proceeds, the MgO‐C brick being submitted to cyclical heating and cooling, interna…