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。
Temperature dependences of birefringence and optical activity in KLiSO4 are studied and used for analysis of symmetries of the phases in temperature region 150-300 K. Monoclinic (class 2) and triclinic (class 1) symmetries were found for phases IV and V. Kinetics of the phase transitions is discussed
Resolution aux RX de la structure du sulfate de cuivre Pentahydrate: M r =249,68 triclinique, P1, a=6,1224, b=10,7223, c=5,9681 A, α=82,35, β=107,33, γ=102,60, V=364,02(3) A 3 , Z=2, D x =2,278 Mg m −3 , M 0 Kα, λ=0,71069 A, μ=3,419 mm −1 , F(000)=254,0, T=298 K, R=0,039 pour 7667 reflexions. Les parametres structurau…
Abstract Die Darstellung der Verbindungen InGaSe 2 und InGaTe 2 wird beschrieben. Röntgenographische Strukturuntersuchungen an den schwarzen, metallisch glänzenden Einkristallen bei verschiedenen Temperaturen zeigen, daß beide Verbindungen im TlSe‐Typ kristallisieren (InGaSe 2 : a = 805,1(1) pm, c = 631,7(4) pm; InGaT…
Conventional and new techniques for making high-frequency B versus H loop and core-loss measurements on magnetic cores are presented and compared. Potential sources of measurement errors and their magnitudes are discussed along with circuits suitable for high-frequency sine-wave or square-wave core excitation. The uti…
Abstract Enhancement factor calculations based on the electromagnetic model of surface‐enhanced Raman scattering (SERS) are presented for a series of metals. The specific dependence of SERS on the excitation and vibrational frequencies, and the aspectratio of spheroidal particles, are discussed. It is suggested that t…
The singlet–triplet splitting (2J=EST) is calculated in bis-[bromo-(N,N-diethylaminoethanolato)copper(II)], belonging to the group of alkoxo-bridged copper(II) dimers, by a recently proposed ab initio method. The singlet–triplet splitting energy is obtained by a perturbation expansion closely related to Anderson’s for…
Gamma-ray exposure buildup factors are calculated using a discrete ordinates direct integration code, PALLAS-PL, SP-Br, for water, concrete, iron, and lead for point isotropic sources. These data include the effects of secondary photon sources arising from Compton scattering, bremsstrahlung, and annihilation. Comparis…
We have made a systematic theoretical survey of the competition between ferroelastic and ferroelectric instabilities in the family of halide-based perovskites of formula ${\mathrm{ABX}}_{3}$, where A is an alkali-metal ion, B is a Be, Mg, or Ca ion, and X is a halide ion. Initially we surveyed the whole series of such…
Abstract Atomic ratio determinations in a series of pure inorganic compounds have been derived from XPS peak intensity measurements taken by area via the so‐called ‘first principles model’ (FPM) and the ‘elemental sensitivity factors’ (ESF) methods. The two methods show similar degrees of accuracy, with a typical erro…
Steps corresponding to (110), (211), (310), (222), and (321) facets in monocrystals of blue phase I (BP I) are described. We show that close to equilibrium, surfaces of BP I monocrystals contain facets and rounded parts on which a series of steps can be distinguished. During growth, the round parts are eliminated and…
Optical studies of LiKSO4 crystals were performed in polarized 11yh.t within the temperature range from 300 up to 1000 K. The observations confirmed the existence of two phase transitions at about 700 and 940 K respectively. The high-temperature phase between 700 and 940 K was found to be ferroelastic.
In a brief study of the feasibility of welding sintered a‐Sic, solid‐state welding and brazing were investigated. Joint quality was determined solely by microstructural examination. Hot‐pressure welding was shown to be feasible at 1950°C. Diffusion welding and brazing were also successful under hot isostatic pressure…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanistic model of the selective catalytic reduction of nitric oxide with ammoniaRonald J. Willey, John W. Eldridge, and J. R. KittrellCite this: Ind. Eng. Chem. Prod. Res. Dev. 1985, 24, 2, 226–233Publication Date (Print):June 1, 1985Publication History Published online1…
Abstract The converter warmup model developed previously (Oh and Cavendish, 1985) has been used to simulate the performance of a packed‐bed converter during the cold‐start portion of vehicle emissions tests. Despite the highly transient converter inlet conditions, the model successfully predicts tailpipe mass emission…
A new measurement system for determination of real and imaginary material coefficients of piezoelectric ceramics is presented.The method of calculation, the hardware, the software and the accuracy are discussed, and measurements of SE11, d31, εT33, SD33, g33, βT33, CD33, h33, βS33 of a piezoelectric ceramic, with the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemical and electronic spin state tuning of the metal center in the nickel(II) tropocoronandsWilliam M. Davis, Michael M. Roberts, Arie Zask, Koji Nakanishi, Tetsuo Nozoe, and Stephen J. LippardCite this: J. Am. Chem. Soc. 1985, 107, 13, 3864–3870Publication Date (Pri…
Electrochemical corrosion rates of Cu and Cu-Ni alloys have been measured in oxygenated 0.5M NaCl and in synthetic seawater using the Tafel extrapolation procedure. In addition, Cu corrosion has been measured with the linear polarization procedure. A rotating disk electrode system was used in the measurements with rot…
The integrated Raman band intensities for internal vibrational modes of various adsorbates at roughened silver electrodes are combined with surface concentrations obtained electrochemically to yield surface Raman scattering cross sections. These data together with the corresponding bulk-phase Raman intensities provide…
Polytellurophene is prepared chemically using FeCl 3 as catalyst at the first time. The electrical conductivity in the doped state is found to be relatively low, 10 -6 S/cm, compared with that in polythiophene. Polyselenophene films prepared by a chemical method are found to indicate similar characteristics with those…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAspects of metal-metal bonding in early-transition-metal dioxidesJeremy K. Burdett and Timothy HughbanksCite this: Inorg. Chem. 1985, 24, 12, 1741–1750Publication Date (Print):June 1, 1985Publication History Published online1 May 2002Published inissue 1 June 1985https://pubs…