Identificación y clasificación de aditivos del hormigón por espectroscopia infrarroja y otros métodos de análisis físicos y químicos Partes 1 y 2
Not available
Materials Literature
文献浏览
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。
Extracts from technical journals
Influencia del medio ambiente en los materiales de construcción II. La Humedad
Not available
Contribución al estudio de los reacciones de hidratación del cemento portland por espectroscopia infrarroja II. Estudio de clínkeres y de cementos portland anhidros
Not available
Estudios espectroscópicos de silicatos Contribución a la determinación espectroscópica de aniones silicatos en silicatos de calcio hidratados
Not available
Phosphate – clay mineral relations in soils and sediments
The geochemical constraints that determine the environments of formation of calcium and aluminum phosphates are assessed in relation to the stabilities of these compounds. In neutral to acidic environments, the weathering of calcareous phosphorites may result in the formation of crandallite and wavellite (low phosphat…
Polarity-dependent memory switching and behavior of Ag dendrite in Ag-photodoped amorphous As2S3 films
High cyclical reproducibility in polarity-dependent switching and memory function was obtained. Switching and memory effect seem to occur when both electrodes (Mo and Ag) are bridged by Ag dendrite which originates as the result of Ag photodoping. The combination of Ag electrode and another kind of electrode material…
Viscous liquids and the glass transition. V. Sources of the excess specific heat of the liquid
The possibility that the excess ’’configurational’’ specific heat ΔCp of liquids above the glass transition temperature Tg might contain contributions either from changes in vibrational frequencies with configurational state, from changes in the anharmonicity of vibrations, or from the influence of changes in configur…
Acoustic phonon instabilities and structural phase transitions
Structural phase transitions are considered in which the order parameter is a homogeneous deformation of the crystal. The fluctuations at these transitions are the acoustic modes, and it is shown that an effective Hamiltonian may be constructed describing the homogeneous deformations and their fluctuations. There are…
Observation of Two-Dimensional Phases Associated with Defect States on the Surface of TiO2
Surface electronic states associated with defects produced by Ar-ion bombardment of Ti${\mathrm{O}}_{2}$ crystals have been studied by ultraviolet-photoemission, electron-energy-loss, and Auger spectroscopy and low-energy-electron diffraction. Evidence is given for three distinct phases dependent upon the extrinsic su…
Surface-Electromagnetic-Wave-Enhanced Raman Scattering by Overlayers on Metals
Using a general formulation we show that by using surface electromagnetic waves in an attenuated-total-reflection prism configuration it should be possible to enhance the intensity of Raman scattering by a thin overlayer on a Ag surface by two orders of magnitude and that the use of surface electromagnetic waves may i…
The exponential and power laws of stress relaxation kinetics and a general relation between the activation volume and effective stress
When calculating the well-known inverse stress dependence of the activation volume, v, from stress relaxation kinetics, the relation vσ* = (10 ± 1) kT is obtained from experiments for both metals and polymers. The stress σ* is either the initial stress σ of the relaxation experiment, in which case v is calculated from…
Oxygen diffusion in BaTiO3 ceramic
High resistivity diffusion layers are formed by reoxidation between 380 and 750 °C in reduced BaTiO3 ceramic. The potential distribution is measured with an applied voltage at these samples. In addition, observations with the polarizing microscope, resistance and gravimetric measurements are made. The results show tha…
Resonant electronic-to-rotational energy transfer: Quenching of F (2P1/2) by H2 (j=0)
Coupled-channel calculations of cross sections for quenching of F (2P1/2) by H2(J=0) are carried out over an energy range of 0.135–1.565 kcal/mole. (AIP)
Tautomeric equilibrium study of thiazolidine-2-thione. Transition metal complexes of the deprotonated ligand
The complexes of deprotonated thiazolidine-2-thione (ttz) with many transition metals have been prepared. Probable structures have been proposed for the complexes on the basis of chemical analysis, spectral data (infrared and visible), and magnetic susceptibility measurements. The ligand field parameters have been eva…
Lattice dynamics ofK2Pt(CN)4Br0.3.3.2D2O (KCP) studied by inelastic neutron scattering
The lattice-dynamical properties of the "quasi-one-dimensional conductor" ${\mathrm{K}}_{2}$Pt${(\mathrm{CN})}_{4}$${\mathrm{Br}}_{0.3}$.3.2 ${\mathrm{D}}_{2}$O (KCP) has been studied by neutron inelastic scattering at temperatures between 20 and 240 K with special attention to the relation to the partial three-dimens…
Domain Switching Behaviour of Ferroelastic LaNbO4and NdNbO4
Ferroelastic domain switching behaviour is observed in large and high quality LaNbO 4 and NdNbO 4 single crystals grown by the Czochralski method. The domain walls which are (10\bar2) and (201) twin planes move when a small stress is applied, and return to the initial positions when the stress is removed. This back -…
Transparent electrode properties of cadmium stannate
Thin films of semiconducting n-type cadmium stannate (Cd2SnO4) have been coated onto different substrate materials by rf sputtering. The films are transparent in the visible and near-infrared part of the optical spectrum and electrically conductive. Conductivities as high as 6500 Ω−1 cm−1 have been achieved. Transpare…
Thermoreflectance spectra of CdO: Band gaps and band-population effects
Thermoreflectance spectra of semiconducting CdO single crystals at 100\ifmmode^\circ\else\textdegree\fi{}K with carrier concentrations in the range (2-40) X ${10}^{18}$/${\mathrm{cm}}^{3}$ give 2.28 eV for the direct ${\ensuremath{\Gamma}}_{15}\ensuremath{-}{\ensuremath{\Gamma}}_{1}$ gap. Two indirect gaps are found:…
Heat capacity and thermal conductivity of hexagonal pyrolytic boron nitride
We have measured the heat capacity and thermal conductivity of the layered material hexagonal pyrolytic boron nitride from 2 to 10 K by a pulse-heating technique. The thermal conductivity has also been determined by a steady-state technique from 1.5 to 350 K. At low temperatures, the heat capacity has a ${T}^{3}$ depe…