Materials Literature
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Abstract The reaction between hydrogen gas and selenium dissolved in liquid tellurium is described as follows H 2 (g) + Se ⇄ H 2 Se(g) The kinetics of this reaction have been investigated at temperatures ranging between 525 and 625°C and at concentrations of selenium varying between 250 and 3,300 ppm. Under all condit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiamond-windowed cell for spectrophotometry of molten fluoride saltsLouis M. Toth, Jack Phillip. Young, and George Pedro. SmithCite this: Anal. Chem. 1969, 41, 4, 683–685Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of Interfacial Area in Sulfuric Acid AlkylationF. B. SprowCite this: Ind. Eng. Chem. Process Des. Dev. 1969, 8, 2, 254–257Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 April 1969https://pubs.acs.org/doi/10.1021/i…
Subsurface residual stress measurements were made on SAE 52100 steel inner races from 207-size deep-groove ball bearings in which ΔH (ball hardness minus race hardness) ranged from −1.1 to 3.5 points Rockwell C. These bearings had been run at an inner-race speed of 2750 rpm and a radial load of 1320 lb producing maxim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeries of rare earth garnets Ln3+3M2Li+3O12 (M=Te, W)H. M. KasperCite this: Inorg. Chem. 1969, 8, 4, 1000–1002Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 April 1969https://pubs.acs.org/doi/10.1021/ic50074a058https:/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry of the system O2-O2--O22--O2- in fused saltsPier G. Zambonin and Joseph JordanCite this: J. Am. Chem. Soc. 1969, 91, 9, 2225–2228Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 April 1969https://pubs.acs…
The luminescence of the unactivated and Bi3+- and Eu3+-activated compounds ABO4 (A is Sc, In; B is P, V, Nb) is reported and compared with the luminescence of the corresponding rare-earth and yttrium compounds. The ScNbO4 shows a weak, blue emission, ScVO4 a blue-green, and InVO4 a green emission. The other host latti…
When a hydrostatic pressure is applied to a metal containing particles or inclusions of different elastic constant, the local shear stresses which develop can be large enough to cause the interface between the particle and the metal matrix to emit dislocations. We have measured the pressure (from which we calculate th…
Abstract Die reinen Phasen oxydierter Nickelhydroxide, die auf der Nickelhydroxidelektrode im alkalischen Akkumulator auftreten können, wurden hergestellt, ihre kristallographischen Daten und ihr chemisches Verhalten untersucht und Umwandlungsbedingungen ermittelt.
The adhesion properties of polymers are known to be influenced by both intermolecular forces operative at the interface and the rheological history of both bonding and unbonding. Recent adsorption and viscoelastic theories of adhesion and cohesion are implemented in a comprehensive examination of these phenomena. Eigh…
Abstract Low temperature gaseous plasmas of ammonia or nitrogen–hydrogen mixtures contain NH 2 groups, or precursors thereof, formed in the plasma, which experimental evidence strongly suggests, can add to various polymer surfaces. The plasmas were established in the 0.3–1.5 torr range by radiofrequency (13.56 MHz) e…
An experiment is described which confirms the theory of the distortion of a cholesteric structure by a magnetic field. Field effects in a sample of p-azoxyanisole doped with cholesteryl acetate were viewed directly with a microscope, and the pitch of the helical structure was measured as a function of field strength.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiamagnetic susceptibility exaltation in hydrocarbonsHyp J. Dauben Jr., James Dennis Wilson, and John L. LaityCite this: J. Am. Chem. Soc. 1969, 91, 8, 1991–1998Publication Date (Print):April 1, 1969Publication History Published online1 May 2002Published inissue 1 April 1969…
Recently, electromigration has been identified as a potential wear-out failure mode for semiconductor devices employing metal film conductors of inadequate cross-sectional area. A brief survey of electromigration indicates that although the effect has been known for several decades, a great deal of the processes invol…
If the distance between atoms in a crystalline lattice is increased, an energy gap appears, which in a divalent material will separate occupied from unoccupied states of an electron. In a non-crystalline substance, a minimum is expected in the density of states (a ‘pseudogap’). An approximate theoretical estimate is g…
Abstract By using a high speed rotating mirror camera combined with a microscope, the rapid initial lengthening of twins and their subsequent broadening have been studied. In zinc, twins of up to 1·9 mm appeared in crystal surfaces within 1 μs and subsequently the tips of such twins were observed to move at up to 780…
The fluorescence efficiency of tetracene single crystals may be enhanced by as much as 38% in a magnetic field $H>2000$ G. The enhancement is anisotropic with respect to the orientation of $H$ in the $\mathrm{ab}$ plane. It is shown that a magnetically sensitive coupling of singlet states to a double-triplet-excito…
The glass-transition temperature of water (T(g)) has been calculated by use of the Tammann-Hesse viscosity equation with the viscosity equal to 10(13) poise at T(g). The derived value of T(g),162 +/- 1 degrees K, is significantly higher than previous estimates.
The absorption spectrum of blue, γ-irradiated CaF2: Y3+ crystals shows several bands in the visible region whose intensity is roughly proportional to the yttrium concentration. Bleaching into the individual bands indicates that more than one center is responsible for the whole spectrum. Inconsistent color response of…
Measurements of quantum yield of Al–Al2O3 films were made at photon energies between 7 and 22 eV. The photoelectric threshold for intrinsic photoemission from amorphous Al2O3 appeared to be about 8 eV. Approximately 1 eV was estimated for the electron affinity of Al2O3. The yield of anodic oxide film on aluminum at 10…