Materials Literature
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The active slip planes, the Burgers vector, and the critical resolved shear stress to induce macroscopic deformation in ZrB 2 single crystals were determined. Room‐temperature microhardness indentation and high‐temperature uniaxial compression loadings were used to induce deformation. Slip occurred in a close‐packed α…
The vapor phase in equilibrium with cuprous chloride has been studied using the Knudsen effusion-mass spectrometric technique. The polymeric species Cu3Cl3, Cu4Cl4, and Cu5Cl5 were observed, the first two in comparable amounts. Partial pressures and heats of vaporization for each species were measured: 3 CuCl(s)→Cu3Cl…
The application of statistical methods to the field of cable dielectric strength is discussed on the basis of experimental results.
Abstract The effects of vinyl acetate content on crystallinity of ethylene–vinyl acetate (E/VA) copolymers were investigated by x‐ray diffraction and differential thermal analysis (DTA). The values of these parameters obtained from DTA were found to agree quantitatively with data calculated from x‐ray, probability equ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic investigation of Group VIA elementsWilliam E. Sartz, Kenneth J. Wynne, and David M. HerculesCite this: Anal. Chem. 1971, 43, 13, 1884–1887Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Published inissu…
The dependence of hyperfine fields at 0 \ifmmode^\circ\else\textdegree\fi{}K at ${\mathrm{Fe}}^{57}$ nuclei in octahedral ($B$) and tetrahedral ($A$) sites in ferrites on the kind of nearest neighbors is discussed in terms of supertransferred hyperfine fields ${H}_{\mathrm{S}\mathrm{}\mathrm{THF}}$. An expression for…
The sounds emitted from single crystals of irradiated LiF, annealed LiF, NaCl, and zinc during constant-strain-rate compressive deformation were recorded and analyzed. The acoustic emission consisted of discrete pulses of varying amplitudes, and the rate of pulsing changed with total strain during the continuous defor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInduced circular dichroism in cholesteric liquid crystalsF. D. Saeva and J. J. WysockiCite this: J. Am. Chem. Soc. 1971, 93, 22, 5928–5929Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Published inissue 1 November 1971https://pubs.acs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways of radiative and radiationless transitions in europium(III) solutions. The role of high energy vibrationsYehuda Haas and Gabriel SteinCite this: J. Phys. Chem. 1971, 75, 24, 3677–3681Publication Date (Print):November 1, 1971Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways of radiative and radiationless transitions in europium(III) solutions. Role of solvents and anionsYehuda Haas and Gabriel SteinCite this: J. Phys. Chem. 1971, 75, 24, 3668–3677Publication Date (Print):November 1, 1971Publication History Published online1 May 2002Pub…
Electromagnetic radiation approximately equal to band-gap energy has been established as responsible for the dissociation of amorphous As2Se3 and As2S3. The dissociation is accompanied by an optical densification observable as a ``photographic'' effect in thin films of these materials. The dissociation can be expresse…
An apparatus based on Bridgman's bellows method, originally devised for fluids, has been constructed for use with solid samples. Mercury is employed as the confining liquid. The operating range is 0≤t≤200 °C and 1≤P≤2000 bar. Calibration with benzene and mercury shows an accuracy of ±2×10−4 cm3/g in the measurement of…
The time dependence of the luminescence decay following pulsed excitation is examined for a system in which excited paramagnetic ions decay by a combination of intrinsic relaxation processes, direct energy transfer to acceptor ions, and energy migration. Three limiting cases are considered: direct energy transfer in t…
The dielectric permittivity and the dielectric loss factor of 5-methyl-3, 4-methyl-3 and 3-methyl-3-heptanol, n- and iso-butanol, 1,2-propanediol, dimethyl and diethyl phthallate, and 3-methylpentane have been measured from 50 to 105 Hz and from −196 to about 20°C above their respective glass transition temperatures.…
Laves phase compounds Zr(Fe, Co) 2 have MgCu 2 structure and Zr(Fe, Mn) 2 change the structure from MgCu 2 type to MgZn 2 type with composition change. Both compounds change from ferromagnetism to paramagnetism with decreasing Fe content and the magnetic moment of Fe, Mn, Co decrease from 1.62, 0.62, 0.62 µ B to zero.…
The thermal conductivities of three single crystals of BeO have been measured from 2 to 300 K. Phonons carry the heat at all temperatures. At 300 K the conductivity is 3.7 W/cm K, which is slightly less than that of copper. In the purest sample the maximum conductivity occurs at 45 K where it is 137 W/cm k, and at tem…
A lattice model of adsorption of an isolated chain polymer between two plates is investigated using a matrix formalism and a grand canonical ensemble (GCE) formalism. The matrix formalism is particularly convenient for calculating the polymer segment density as a function of the distance from one of the plates for dif…
A study is made on the dispersions of resistivity and dielectric constant of α-Fe 2 O 3 , γ-Fe 2 O 3 , Fe 3 O 4 , Zn ferrite, Mn ferrite, and MnZn ferrite fine particles over the frequency range of 10 Hz to 1 MHz in the temperature range from 77°K to 300°K. The Maxwell-Wagner interfacial polarization arising from the…
The application of the metal–semiconductor boundary layer theory to the study of the catalytic properties of supported metal catalysts is discussed. Published work on the structure of very small metal crystals and on anomalous adsorption and catalytic centres in such crystals is discussed with particular reference to…
The chemical consequences of the mechanical treatment of inorganic solids has recently become the subject of detailed studies arising from increasing mechanical loading and the development of a highly effective technology of size reduction. The present review of published data examines the influence of mechanical trea…