Materials Literature
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Direct current electric fields applied to polycrystalline barium titanate cause slow changes with time of current, potential distribution, and coloration. At temperatures between 250° to 300°C and with several thousand volts/cm applied, the current increases initially, then decreases, and then increases again. An anal…
Diffusion coefficients for transition metal ions in single-crystal MgO have been determined in the temperature range 1000°-1850°C. from concentration distributions obtained with the aid of x-ray absorption analysis and electron microbeam probe spectroscopy. The variation of the diffusion coefficients with temperature…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWETTING PROPERTIES OF ACRYLIC AND METHACRYLIC POLYMERS CONTAINING FLUORINATED SIDE CHAINSMarianne K. Bernett and W. A. ZismanCite this: J. Phys. Chem. 1962, 66, 6, 1207–1208Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSulfur in Amine SolventsRobert Earl. Davis and Hisham F. NakshbendiCite this: J. Am. Chem. Soc. 1962, 84, 11, 2085–2090Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/ja00870a017…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Photoreduction of Porphyrins: Structure of the ProductsD. MauzerallCite this: J. Am. Chem. Soc. 1962, 84, 12, 2437–2445Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/ja00871…
ADVERTISEMENT RETURN TO ISSUEPREVArticleThe Phosphazenes (Phosphonitrilic Compounds).R. A. Shaw, B. W. Fitzsimmons, and B. C. SmithCite this: Chem. Rev. 1962, 62, 3, 247–281Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/c…
Effect of external magnetic field on the screw structure of spin arrangement at absolute zero is studied in detail for the case where the field is applied perpendicularly to the screw axis. First, the anisotropy energy which confines the spin vectors in the plane perpendicular to the screw axis is assumed to be so lar…
Sharp-line fluorescence, paramagnetic resonance in the ground state, and optical absorption due to ${\mathrm{Mn}}^{4+}$ in $\ensuremath{\alpha}$-${\mathrm{Al}}_{2}$${\mathrm{O}}_{3}$ have been observed (analog of ${\mathrm{Cr}}^{3+}$). The ${\mathrm{Mn}}^{4+}$ valence state is obtained by charge compensation with ${\m…
In the determination of the liquidus, solidus, and subsolidus of the system MgO‐MgAl 2 O 4 the limits of the solid solution of A1 ions in periclase and Mg ions in spinel were measured. By using both X‐ray diffraction and optical techniques, the maximum periclase solid solution was found at 82 wt% MgO, 18 wt% A12O3 (9.…
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The infra-red absorption spectrum of two natural Type IIb semi-conducting diamonds has been measured by high resolution grating spectroscopy in the range 0.1 to 0.7 eV and at temperatures from 70° to 293 °K. The various absorption features (observed in much greater detail at low temperature than hitherto) were as foll…
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Abstract Oriented films of 4‐ O ‐methylglucuronoxylan from several sources were prepared by hot stretching acetyl derivatives. The resulting oriented samples could be converted to crystalline xylans without destroying the orientation. Infrared spectra of the oriented samples were recorded using polarized radiation. Ba…