Materials Literature
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A method is presented for the analysis of relaxation spectra resulting from Maxwell-Wagner interfacial polarization in sintered oxide compacts. Using a multilayer model to represent ferric oxide pellets, containing heterogeneities induced by the sintering process, a distribution function of the relaxation times is der…
Abstract Simultaneous population and mass balances have been solved together with a generalized form of nucleation‐growth rate kinetics to obtain the form of crystal size distribution (CSD) for several idealized modes of crystallizer operation, including seed crystal removal, product classification, arbitrary solids c…
The transfer of the glucosyl moiety from uridine diphosphate glucose in the presence of Acetobacter xylinum cell-free extracts led to the formation of a mixture of alkali-soluble and -insoluble cellodextrins. Typical cellulose fibrils could not be detected by electron microscopy in this product. Immediately after rele…
The problem of computing the phonon distribution and thermal conductivity in the presence of N processes is examined in the framework of the Boltzmann-Peierls equation. A heat flow may be associated with drift and diffusive distributions respectively; this intuitive concept is given specific mathematical basis as a na…
The crystal structure of Mg 2 P 2 O 7 reported by Lukaszewicz has been refined by least squares analysis. Data of the hkl type with O ≤ k ≤ 6 have been used to obtain improved atomic parameters. The central oxygen atom of the P 2 O 7 −4 is found to have enhanced thermal motion in the plane perpendicular to the P—P vec…
The elastic stiffness coefficients of single-crystal iron have been measured at room (300°K) and liquid-nitrogen (77°K) temperatures using the ultrasonic pulse-echo technique. The three coefficients were determined from a total of seven independent modes. The values at 300°K are C11=2.28±0.02, C12=1.32 ±0.04, and C44=…
β-Zn 2 P 2 O 7 crystallizes in the C2/m space group with lattice parameters a = 6.61 ± 0.01 Å, b = 8.29 ± 0.01 Å, c = 4.51 ± 0.01 Å, β = 105.4° ± 0.2° and z = 2. The anion, P 2 O 7 −4 , is centered with its mirror plane coinciding with the mirror plane of the space group. The central oxygen atom, however, shows high a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand Field Strength of the Nitrogen End of Cyanide and Structures of Cubic Cyanide PolymersD. F. Shriver, Shirley A. Shriver, and Stanley E. AndersonCite this: Inorg. Chem. 1965, 4, 5, 725–730Publication Date (Print):May 1, 1965Publication History Published online1 May 200…
Abstract The submicroscopic morphology of uniaxially deformed isotactic polypropylene films has been examined by x‐ray diffraction, infrared dichroism, birefringence, sonic modulus, small‐angle light scattering, density, and electron microscopic techniques. Several new theoretical relationships and techniques have bee…
The Preisach model for magnetic particle interaction in recording tapes is used as a basis for the calculation of the frequency response of the ac biased magnetic recording process. These results are compared with experiment. Since there are numerous other factors present in normal tape recording which affect the freq…
Article Löslichkeit und Diffusionsgeschwindigkeit von Wasserstoff und Deuterium in Einkristallen aus Nickel und Kupfer was published on May 1, 1965 in the journal International Journal of Materials Research (volume 56, issue 5).
The phase equilibrium relations hips for a major portion of the Cd,O,,-TiO, sys te m we re de te rmined In a ll', from a stud y of soltd state reaction s and from fusion characteris ti cs Three 'nt d ' t
The ground state splitting of Fe 3+ in a strong trigonal field is studied theoretically in order to account for the uniaxial anisotropy of hexagonal crystal BaFe 12 O 19 . The spin Hamiltonian D S z 2 is derived as the second-order contribution of the spin-orbit interaction, the crystal field being treated as a part o…
An apparatus based on the method of Jain and Krishnan was developed for property measurements in the temperature range from measurable radiant emission to the thermal stability limit of metallic materials. Apparatus and experimental techniques for cylindrical specimens with length‐to‐diameter ratios >4 are describe…
Abstract Important advances have recently been made in the chemisty of the lower oxides of sulfur, both in the preparative sphere and by the application of modern physical methods of investigation. In this paper the knowledge gained to date on the compounds SO, S 2 O 2 , S 2 O, S 2 O 3 , and the polysulfur oxides is r…
In a previous paper, a system of nonlinear differential equations and boundary conditions governing the macroscopic behavior of arbitrarily anisotropic nonconducting magnetically saturated media undergoing large deformations, was derived. The derivation utilized the classical procedure of defining field vectors and de…
Phase relations in the system zirconium‐carbon were established by DTA, X‐ray, and metallo‐graphic methods. Only one phase, a monocar‐bide with the NaCl structure, was found. The low‐carbon phase boundary for the monocarbide contains 38.5 at.7, carbon between 1900’and 3300OC. The carbon‐rich boundary between 2850” and…
Twinned crystals of low cristobalite from Ellora, Hyderabad, India were found to have space group P 4 1 2 1 (or P 4 3 2 1 ) and cell dimensions a = 4.978 and c = 6.94 8 Å. A three-dimensional full-matrix least-squares refinement based upon 110 integrated intensities which were corrected for the effects of twinning, co…
A theoretical analysis, based on the Fuchs-Sondheimer formalism, is given of the conductivity of single-layer, thin metallic films in which the scattering of the conduction electrons is different at each surface. The electron-surface scattering is described by the parameters P and Q which represent the fractions of co…
Dislocation loops have been observed in iron foils irradiated with protons or Fe+ ions of energy 150 kev. Those produced by irradiation with Fe+ ions are shown to lie on {100} planes and to be pure edge in character. They are normally square, with the sides in the corresponding <100> directions, and are formed by the…