Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical conductivity by the bis(1,3-dithiole)-bis(1,3-dithiolium) systemFred Wudl, Darold Wobschall, and Earl J. HufnagelCite this: J. Am. Chem. Soc. 1972, 94, 2, 670–672Publication Date (Print):January 1, 1972Publication History Published online1 May 2002Published inissu…
The effect of grain growth on stresses in films is discussed. Grain growth generally leads to stress relaxation when the film is under a compressive stress. When the initial grain size is below a critical value, grain growth can occur by normal boundary migration and generates a tensile stress in the plane of the film…
Second-order elliptic differential equations (such as the time-independent single particle Schrödinger equation) may be solved in a finite closed disjoint region of space independently of the rest of space. The solution in all space may then be determined by solving the equations in the exterior region together with b…
It is shown that the energy of a screw disclination of strength + 1 [1] (2 π rotation of the director around the line) is reduced if the molecules are allowed to relax out of the plane perpendicular to the line. This solution has no singularity on the axis, r = 0. The calculation is done in the case of the anisotropic…
The first page of this article is displayed as the abstract.
The effect of α,ω‐polymethylenediamines NH 2 ‐ ( CH 2 ) n ‐ NH 2 ( n = 2 – 12 ) on the corrosion of iron in deaerated 6 N HCl at 25 ° was investigated by polarization measurements and colorimetric analysis of solution. The adsorption of these inhibitors at the metal/solution interface was monitored by measurement of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic spectra, photochemistry, and autoxidation mechanism of the sulfite-bisulfite-pyrosulfite systems. SO2-, SO3-, SO4-, and SO5- radicalsE. Hayon, A. Treinin, and J. WilfCite this: J. Am. Chem. Soc. 1972, 94, 1, 47–57Publication Date (Print):January 1, 1972Publication…
Starting from a simple atomic model giving the potential between electrons and atoms as V ( r ) = Ze 2 a s −1 / sr s with the empirical value s =fraction six-fifths, we combine the diffusion effect due to multiple collisions and the energy retardation in accordance with a modified Thomson-Whiddington law, with the sca…
Two general explanations for the Meyer-Neldel rule are described. The required correlation between the activation energy and pre-exponential factor for conductivity is shown to result by considering (i) a rectifying layer at the electrode-solid interface which produces a field dependent potential barrier through which…
Thermoluminescence (TL) and optical absorption measurements on LiF(TLD-100) show that the radiation- induced increase of TL sensitivity of this phosphor occurs in the luminescence process. New data are presented on thermally stimulated exoelectron emission (TSEE), photoluminescence (PL) and radioluminescence (RL). The…
The 100 degrees C thermoluminescence (TL) sensitivity of fired quartz is increased greatly by beta irradiation and subsequent heating (eg by an order of magnitude following a 1 krad dose and heating to 500 degrees C). Its radioluminescence response increases similarly, implying that the increase of TL sensitivity aris…
Abstract The five magnetostriction constants h1 to h5 have been determined for nickel at 4.2, 77 and 300 K from independent measurements on two crystals. At 4.2 K, h3, h4 and h5 are all small compared with h1 and h2 and there is nothing to suggest that a five-constant equation inadequately represents the magnetostrict…
The electrodynamic phenomenon of void resonance is used to interpret anomalous structure reported by Donovan and co-workers in the uv dielectric constants of evaporated amorphous germanium. The resulting void parameters are consistent with the existence of a connected network of microcracks perhaps 6 \AA{} in width, s…
Electrical conduction in resistor networks with all but a fraction $p$ of the resistors removed is studied as a paradigm of classical transport in disordered materials. A self-consistent effective-medium theory provides a quantitative description of the model, except in a small critical region, where the scaling law $…
The shape memory effect is investigated on many kinds of materials undergoing the martensite transformation. The present experiment proves that such metals and alloys as Co, Ti, Zr, CoNi, CuAl, FeNi and InTl exhibit the shape memory effect. From these results and considerations on the plastic deformation of materi…
Self diffusion of Cr51 in pure chromium, Cr + 20 wt% Ni, Cr + 44 wt% Ni, and Cr + + 65 wt% Ni has been measured over the temperature ranges of 1000 to 1900, 1000 to 1525, and 900 to 1350 °C, respectively. Over the temperature range of 1000 to 1750 °C the Arrhenius plot for the self diffusion of Cr51 in pure Cr is line…
The thermal conductivity of lightly Sb-, P-, and As-doped germanium was measured between 0.3 and 4.2 K. The strong scattering of phonons by neutral donors observed earlier above 1 K diminishes below 1 K, as predicted by the theories of Keyes and of Griffin and Carruthers. Inclusion of resonance fluorescence of phonons…
The three independent adiabatic elastic constants and their temperature derivatives have been measured near room temperature for single-crystal $\ensuremath{\alpha}$-phase Cu-Al alloys for compositions to 13 at.% Al using an ultrasonic pulse-superposition technique. The elastic shear constant ${C}_{44}$ increases line…
A detailed Raman-scattering investigation of LiI${\mathrm{O}}_{3}$, combined with the polarized infrared-reflectivity measurements, is reported. The dielectric constants determined by the Lyddane-Sachs-Teller (LST) relation (${\ensuremath{\epsilon}}_{\mathrm{xx}}=6.7,{\ensuremath{\epsilon}}_{\mathrm{zz}}=6.1$) do not…
The dc conductivity and ac dielectric susceptibility of normal and deuterated lithium hydrazinium sulfate have been measured over a wide temperature range at frequencies up to 9.33 GHz. Over a very large temperature and frequency range the real and imaginary parts of the susceptibility are very large (up to ${\ensurem…