Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric Properties of Alkyl Amides. II. Liquid Dielectric Constant and LossS. J. Bass, W. I. Nathan, R. M. Meighan, and R. H. ColeCite this: J. Phys. Chem. 1964, 68, 3, 509–515Publication Date (Print):March 1, 1964Publication History Published online1 May 2002Published in…
The magnetic structures in FeCr2S4 and FeCr2O4 have been investigated by the powder neutron diffraction technique. From room temperature diffraction patterns, it is established that both compounds are normal spinels with sulfur and oxygen parameters u=0.384 and 0.386, respectively. The FeCr2S4 specimen exhibits a Néel…
The properties and composition of glasses suitable for crystallization of BaTiO 3 are described. The crystallization of certain glasses results in a nearly complete recovery of BaTiO 3 , besides the feldspar BaAl 2 SiO 3 as a minor phase. The mechanism of crystallization was investigated by thermal analysis, viscosity…
Ferromagnetism has been found in several divalent europium compounds. Some of these materials are particularly simple in both crystal and magnetic structure and are ideal for experimental and theoretical study. The materials we have investigated can be divided into three groups, europium chalcogenides, europium haloge…
Summary The Q/I relations of labile soil K relate its availability or intensity (I) to the amount (Q) present. The activity ratio a K /√(a Ca ±Mg) has already been proposed as a measure of the intensity factor (part I). The ability of a soil to maintain the activity ratio against depletion by plant roots is governed p…
Magnetic and electric properties of some single crystals of complex composition of perovskite-type structure were investigated and coexistence of ferroelectric and antiferromagnetic properties was shown in them. It was found that single crystals YMnO3 and YbMnO3 of the new class of ferroelectrics, discovered by Bertau…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect Titration of Epoxy Compounds and Aziridines.R. R. JayCite this: Anal. Chem. 1964, 36, 3, 667–668Publication Date (Print):March 1, 1964Publication History Published online1 May 2002Published inissue 1 March 1964https://pubs.acs.org/doi/10.1021/ac60209a037https://doi.or…
The ionic conductivity of cubic solid solutions in the system CaO ‐Y 2 O 3 ‐ZrO 2 was examined. Particular Y 2 O 3 ‐ZrO 2 binary compositions were more conductive at elevated temperatures (>600°C) than either CaO‐ZrO 2 binary or CaO‐Y 2 O 3 ‐ZrO 2 ternary compositions. The higher ionic conductivity appears to be re…
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Abstract Tensile fatigue failure of a gum vulcanizate of noncrystallizing SBR can be accounted for by the growth of small flaws initially present in the rubber. Fatigue of crystallizing natural rubber was shown in Part I to be attributable to the same cause. Cut growth results are interpreted in terms of the tearing e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of the Lower Equilibrated PhenylsilsesquioxanesJohn F. Brown, Lester H. Vogt, and Paul I. PrescottCite this: J. Am. Chem. Soc. 1964, 86, 6, 1120–1125Publication Date (Print):March 1, 1964Publication History Published online1 May 2002Published…
The kinetics of the thermoluminescence of single crystal NaCl, KCl, and KBr irradiated with 40-MeV alpha particles were investigated. Only one glow peak, composed essentially of a single emission band, was obtained for each of the salts investigated. To attempt complete analysis of the kinetics, both glow curve and is…
Abstract Experiments in which calcium chloride displaced sodium chloride from four cores showed the extent of asymmetry in the resulting effluent concentration profiles. These results provided a check on how validly the mixing process is modeled by a differential (i.e., not finite-stage) capacitance mathematical model…
CONTENTS I. Introduction 103 II. Methods for the experimental investigation of self-diffusion and interdiffusion in polymer systems 103 III. Mechanism of self-diffusion and interdiffusion of polymers 105 IV. Influence of time, temperature, and concentration on self-diffusion and interdiffusion in polymers 106 V. Influ…
Thermal denaturation temperature of newly reconstituted collagen fibrils from rat tail tendons is 52 degrees C compared with 42 degrees C for neutral solutions. This suggests that the increase in concentration of collagen within the fibril increases the stability of the individual molecules. The absence of firm interm…
CONTENTS 1. Magnetic Properties of Rare-earth Ferromagnets 179 2. Neutron-Diffraction Studies of the Magnetic Structure of Rare-earth Ferromagnets 183 3. Theory of the Helicoidal Magnetic Structure 184 4. Nature of Magnetic Phase Transitions in Rare-earth Ferromagnets 190 5. Antiferromagnetism of Metals of the Cerium…