Materials Literature
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Dielectric specimens in the shape of a frustum of a cone were evaluated for surface flashover strength in vacuum of 10-5 torr. Data were obtained for positive and negative pulses of several hundred kilovolts amplitude and with rise times in the nanosecond and microsecond region. The results indicate that most material…
I - Absorption of Finite-Amplitude Waves.- II - Acoustic Radiation Pressure.- III - Acoustic Streaming.- IV - Pulsations of Cavitation Voids.- V - Experimental Investigations of Ultrasonic Cavitation.- VI - The Cavitation Zone.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen-hydrogen tautomerism in porphyrines and chlorinesC. B. Storm and Y. TekluCite this: J. Am. Chem. Soc. 1972, 94, 5, 1745–1747Publication Date (Print):March 1, 1972Publication History Published online1 May 2002Published inissue 1 March 1972https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel antiferromagnetic oxo-bridged manganese complexP. M. Plaksin, R. C. Stoufer, M. Mathew, and G. J. PalenikCite this: J. Am. Chem. Soc. 1972, 94, 6, 2121–2122Publication Date (Print):March 1, 1972Publication History Published online1 May 2002Published inissue 1 March 197…
Abstract Calcite phases with different amounts of ferrous iron (determined by microprobe analysis) are distinguishable by study of stained thin sections and stained acetate peels. We have defined four such phases, they are (a) non-ferroan calcite (0.0% FeO; red stain), (h) ferroan calcite I (0.5% to 1.5% FeO; red-purp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of low-spin iron porphyrins. I. Bis(imidazole).alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatoiron(III) chlorideD. M. Collins, R. Countryman, and J. L. HoardCite this: J. Am. Chem. Soc. 1972, 94, 6, 2066–2072Publication Date (Print):March 1, 1972Publicati…
An analysis of infrared conversion to visible and ultraviolet radiation by Yb3+–Er3+, Yb3+–Ho3+, and Yb3+–Tm3+ ions in crystals is presented. The expression for the visible power output in the presence of back transfer from the active ion to the energy-transferring ion (Yb3+) is given and the relationship between the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Weight Dependence of the Crystallization Kinetics of Linear Polyethylene. I. Experimental ResultsE. Ergoz, J. G. Fatou, and L. MandelkernCite this: Macromolecules 1972, 5, 2, 147–157Publication Date (Print):March 1, 1972Publication History Published online1 May 200…
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Partially stabilized zirconia (PSZ) ceramics in the system CaO‐ZrO 2 were characterized. The microstructure, as revealed by optical microscopy, consisted of grains of pure ZrO 2 distributed in a matrix of fully stabilized material. Electron microscopy showed that the matrix grains have a complex substructure of 1000‐Å…
Lithium ferrites are low-cost materials which are attractive for microwave device applications. For a number of years these materials have been prominent in the computer core industry because of excellent temperature performance and the squareness of their hysteresis loops. Previous attempts at exploiting lithium ferr…
Abstract An experimental study of thermal polymerization of styrene in the temperature range 100–200°C and conversion range 0–100% is reported. Conversions, molecular weight averages, and molecular weight distributions were measured. A kinetic model with third‐order initiation gives a satisfactory fit of conversion an…