Materials Literature
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Thermokraft, elektrische Leitfähigkeit und HALL-Effekt unterschiedlich dotierter n- und p-leiten-der LaCoO 3 -Proben wurden über einen größeren Temperaturbereich gemessen. Die Meßergebnisse konnten mit dem Modell des „kleinen Polaron“ gedeutet werden, nach dem die Transporteigenschaften durch thermisch aktivierte Plat…
It is generally agreed that the rate of grain growth in metallic systems may be expressed by an equation that describes the square of the average diameter as being proportional to the time of annealing at constant temperature. The proportionality constant is exponentially dependent on temperature as normally expected…
Domain walls in ferromagnetic films may be imaged by out-of-focus electron microscopy. The wall images are light or dark depending on the relative sense of the magnetization either side of the wall, the incident electron beam being diverged or converged about the wall position. A relationship is obtained between the i…
Electron irradiation below 1-Mev and subsequent recovery in copper have been investigated. The minimum threshold displacement energy is found to be less than 22 ev. The details of the recovery in stage I, as a function of electron energy, are found to be more complex than anticipated. Specifically, ${\mathrm{I}}_{a}$…
Self-diffusion in liquid tin has been measured by the capillary-reservoir technique covering a temperature range of over 700°C. Considerable deviation of the data from linearity on a log D versus 1/T plot was found which is of the general type predicted on the basis of a fluctuation theory proposed by one of the autho…
Crystallinity and crystallite size determinations have been carried out on a number of samples of swollen, hydrolyzed, and swollen and hydrolyzed cotton fibers, employing x-ray diffraction techniques and a Geiger counter recording spectrometer. A new hi variate analysis technique has been developed in order to determi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE SOLUBILITY BEHAVIOR OF HYDROXYLAPATITEVictor K. La MerCite this: J. Phys. Chem. 1962, 66, 6, 973–978Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/j100812a003https://doi.org…
The mechanism of crystal nucleation in a titania-magnesia-alumina-silica glass has been studied by light scattering. Predominantly isotropic scattering centers become anisotropic during the initial crystallization process. This is interpreted as crystal nucleation within glassy concentrations fluctuation of titania. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Tricyclo[5.3.0.02,6]decane System. The Photodimers of CyclopentenonePhilip E. EatonCite this: J. Am. Chem. Soc. 1962, 84, 12, 2344–2348Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE KINETICS OF HYDROGEN ATOM RECOMBINATION ON PYREX GLASS AND FUSED QUARTZ1Bernard J. Wood and Henry WiseCite this: J. Phys. Chem. 1962, 66, 6, 1049–1053Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://p…
The mechanical properties of LiF single crystals with relatively low impurity content are compared with those containing ∼75 ppm of magnesium. These crystals represent the extremes of material that have been obtained from the Harshaw Chemical Company during the past six years. The recently produced, ``pure'' crystals…
Abstract Spiral structures on lamellar single crystals of polyethylene have been ascribed to screw dislocation. Several photographs are shown which seems to verify the possibility of origination of the screw dislocations due to the collision of two growing single crystals. This mechanism accounts for the following fac…
The specific heats of the ordered alloys Mn 3 AlC and Mn 3 ZnC were measured from −150 to 100 °C. A single higher-order anomaly was observed at the Curie temperature (−9 °C) of Mn 3 AlC, indicating that a ferromagnetic state existed above −150 °C. The two specific heat anomalies observed for Mn 3 ZnC at −35 and 65 °C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCOMPOUND REPETITION IN OXIDE-OXIDE INTERACTIONS: THE SYSTEM Li2O-V2O5Arnold Reisman and Joan MineoCite this: J. Phys. Chem. 1962, 66, 6, 1181–1185Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.…
Abstract The interpretation of the x‐ray fiber photograph of stretched linear polyphosphonitrile chloride was carried out by means of Fourier transform methods with the aim of establishing the chain conformation without considering the mode of packing in the crystal lattice. The results of such an analysis lead to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT2,2″-BipyrroleHenry. Rapoport and Neal. CastagnoliCite this: J. Am. Chem. Soc. 1962, 84, 11, 2178–2181Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/ja00870a032https://doi.org/1…
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…