Relaciones entre lo carbonatación del cemento portland, el grado de cocción del clínker y algunos fenómenos expansivos en el ensayo de autoclave
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Materials Literature
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Determinación del contenido de escorias en los cementos siderúrgicos
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Bibliography
Procedimiento para lo obtención cuantitativa del residuo al tratamiento salicílico-metanólico
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Identificación y clasificación de aditivos del hormigón por espectroscopia infrarroja y otros métodos de análisis físicos y químicos Partes 1 y 2
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Extracts from technical journals
Influencia del medio ambiente en los materiales de construcción II. La Humedad
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Contribución al estudio de los reacciones de hidratación del cemento portland por espectroscopia infrarroja II. Estudio de clínkeres y de cementos portland anhidros
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Estudios espectroscópicos de silicatos Contribución a la determinación espectroscópica de aniones silicatos en silicatos de calcio hidratados
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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…