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。
The normal modes of vibration and their frequencies are calculated for benitoite, a mineral whose crystal structure (space group ${\mathit{D}}_{3\mathit{h}}^{2}$) consists of three-membered silicate rings (${\mathrm{Si}}_{3}$${\mathrm{O}}_{9}$) linked by ${\mathrm{Ba}}^{2+}$ and ${\mathrm{Ti}}^{4+}$ ions. Factor-group…
Amorphous lithium electrolyte thin films, xLi 2 O·ySiO 2 ·zP 2 O 5 , were deposited by rf magnetron sputtering of pure and mixed‐phase lithium silicate, lithium phosphate, SiO 2 , Li 2 O, and Li 2 CO 3 targets, and their compositions were determined using proton‐induced y ‐ray emission spectroscopy, energy‐dispersive…
Quasicrystals and related phases were grown to study their morphology and to try to gain sonie insight into their growth mechanism. Using different characteriz-ation techniques a relationship between morphology, composition and structure of the quasicrystals and related phases is established. This relationship is qual…
The charge storage properties of corona-charged biaxially oriented polypropylene (BOPP) and unoriented polypropylene (PP) films have been studied. Thermally stimulated charge decay and open and short circuit thermally stimulated currents, were measured. A half-value charge decay temperature for BOPP was T/sub 0.4/=118…
X-ray photoemission measurements of high purity CuCl2 are presented. XPS studies of Cu compounds in this laboratory have been motivated by the need to identify species on chemically etched high temperature superconductor surfaces [see R. P. Vasquez, M. C. Foote, and B. D. Hunt, J. Appl. Phys. 66, 4866 (1989)].
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(aryl ether ketone) (PAEK) block and chain-extended copolymers. 2. Preparation and characterization of chain-extended PAEK copolymers and poly(ether ketone ketone)/poly(ether ether ketone) block copolymersJ. E. Harris, P. A. Winslow, J. H. Botkin, L. M. Maresca, R. A. Cl…
Single-crystal X-ray diffraction (Mo Kalpha radiation, lambda = 0.71073 angstrom) was used to determine the structure Of the commensurate inorganic misfit-layer compound (BiSe)alpha0TaSe2, alpha0 = 12/11 congruent-to 1.09. The structure is described as a (3 + 1)-dimensional intergrowth compound with two subsystems and…
The effective dielectric response ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{M}}$ of a composite with aligned spherodial inclusions is calculated. Using the dipolar and the mean-field approximation (MFA) an analytical expression for ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{M}}$ as a functional of the two-particle di…
Abstract Es wurde der Einfluß der Substitution von Ag + durch Na + auf die Kristallstruktur und die Ionenleitfähigkeit von Ag 3 YCl 6 (aufgefüllter LiSbF 6 ‐Typ) untersucht. Das System Ag 3−x Na x YCl 6 zeigt vollständige Mischkristallbildung. Der aufgefüllte LiSbF 6 ‐Typ tritt über den gesamten Bereich auf. Erst bei…
X-ray photoemission measurements of high purity CuBr are presented. XPS studies of Cu compounds in this laboratory have been motivated by the need to identify species on chemically-etched high temperature superconductor surfaces [see R. P. Vasquez, M. C. Foote, and B. D. Hunt, J. Appl. Phys. 66, 4866 (1989)].
Measurement models have been applied to electrochemical impedance data collected at the corrosion potential for a copper disk rotating in alkaline- and acid-aerated 0.5 M chloride solutions. Several applications of measurement models for the interpretation of experimental impedance data are demonstrated. Corrosion is…
Coherent neutron-scattering experiments on liquid cesium and rubidium near the melting point reveal an anomalous dispersion of collective modes for frequencies \ensuremath{\omega}${\mathrm{\ensuremath{\tau}}}_{\mathit{M}}$\ensuremath{\gg}1 with ${\mathrm{\ensuremath{\tau}}}_{\mathit{M}}$ the Maxwell relaxation time fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of the first .alpha.-linked quaterpyrroleHidetsugu Ikeda and Jonathan L. SesslerCite this: J. Org. Chem. 1993, 58, 8, 2340–2342Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi…
Abstract Comparing the state of reaction advancement of I/S (illite content of illite/smectite mixed layer minerals) and organic matter (vitrinite reflectance) in instances of high temperature gradients allows one to observe the evolution of geologic materials under extreme conditions. In a geothermally heated sedimen…
Electrical conductivities of aluminum nitride (AIN) doped with various ions of different sizes and valences have been measured at elevated temperatures. Grain conductivities of samples doped with large cations, obtained from complex impedance patterns, were much higher than those doped with small cations. The temperat…
Aluminum nitride/boron nitride composite was synthesized by using boric acid, urea, and aluminum chloride (or aluminum lactate) as the starting compounds. The starting materials were dissolved in water and mixed homogeneously. Ammonolysis of this aqueous solution resulted in the formation of a precomposite gel, which…
Octylcyanobiphenyl, a bilayer smectic A liquid crystal at room temperature, was deposited on gratings, grids, and flat surfaces, and was studied using high-resolution x-ray scattering at shallow angles of incidence. One surface of the film was in contact with air and the other was in contact with the glass or silicon…
New preparative routes to the title compounds are reported in which the yields are substantially improved over previous methods. In one method, reaction of O 2 with a mixture of XC 6 H 4 CN 2 S 2 + Cl − and Ph 3 Sb leads to the products in 40–60% yield. In another, the reaction of the same salts with silylated amidine…
Surface-enhanced Raman scattering (SERS) spectra of three different classes of adsorbates have been analyzed: (1) native and denatured calf thymus DNA and adenine, as examples of molecules with electronic transitions in the UV region only; (2) flavine adenine dinucleotide (FAD) and doxorubicin (DOX), as examples of ch…
The precipitation sequence of the discontinuous and continuous modes in Cu–0·9Be and Cu–1·4Be binary alloys (compositions in wt-%) has been studied primarily via metallographic observations and hardness measurements. A single C curve and triple C curves separated by two temperatures T 1 and T 2 (T 1 >T 2 ) are obta…