Variantes en la prefabricación de pasta cerámicas
Ventajas del método de prensado en seco en la industria cerámica. Consideraciones sobre la cocción a temperatura baja.
Materials Literature
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Empleo de ladrillos refractarios aislantes en los hormigones cerámicos intermitentes
Interés del empleo de ladrillos refractarios aislantes en la construcción, de hornos cerámicos con el f in de tener una mayor economía de combustible, un aumento de la producción, mejor calidad de las piezas y reducción en el coste de construcción.
Placas coloreadas de fibrocemento
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Burning cement in air-suspension
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Empleo de flutox para la protección de hormigón
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New lime kiln safety device
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Construcción y reparación de hornos rotatorios
El empleo de la soldadura facilita la reparación de los hornos rotatorios, acortando el tiempo necesario para dicha operación. Se presentan diversos ejemplos prácticos.
Recomendaciones prácticas para los ensayos de cemento
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Ensayo para la determinación indirecta de la resistencia a la tracción sus aplicaciones
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Moldes de aluminio para las probetas cúbicas de hormigón
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Bloques Wilson
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Importancia del momento en que se realiza el curado del hormigón
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Lattice energy of ionic crystals
The first page of this article is displayed as the abstract.
Oxidation of Alloys Involving Noble Metals
Diffusion processes during the oxidation of alloys involving noble metals are analyzed theoretically. An oxide film of uniform thickness is stable only if diffusion in the alloy is relatively rapid compared with diffusion in the oxide of the less noble metal. Otherwise, there is the tendency to form a rugged alloy‐oxi…
Dynamic Method for Measuring the Pyroelectric Effect with Special Reference to Barium Titanate
A dynamic method has been developed for the study of the pyroelectric effect. Transient currents produced in single crystals of barium titanate when subjected to flashes of light are shown to be pyroelectric in origin. The illumination results in a small change in the temperature of the crystal which, in turn, causes…
Dielectric Behavior and Structure
Abstract not Available.
III. Dislocation densities in some annealed and cold-worked metals from measurements on the X-ray debye-scherrer spectrum
Two basic equations are derived for deducing the dislocation density in powdered materials from the particle size and strain breadth measured from the Debye-Schemer spectrum. In the particle size estimate, it is assumed that the material has a block structure similar to that found in microbeam studies and that the dis…
Field Emission Microscopy of an Allotropic Transformation:α−βTitanium
The field emission microscope has been applied to a study of the allotropic transformation in single microcrystals of titanium. Patterns with symmetry characteristic of the high and low temperature phases are presented. Techniques for analyzing the patterns are outlined. Data derived from the pattern analyses give an…
Ferromagnetic Resonance in Manganese Ferrite Single Crystals
The microwave properties of two types of manganese ferrite single crystals have been investigated by means of the ferromagnetic resonance phenomenon from 300\ifmmode^\circ\else\textdegree\fi{}K to 4.2\ifmmode^\circ\else\textdegree\fi{}K and at 24 000, 9100, 5600, and 2800 Mc/sec. The low resistivity of one of the crys…
Interpretation of the Optical Properties of Metal Surfaces
The surface optical properties of the metals Ag, Au, Cu, Pt, Ir, and Ni in the infrared are shown to obey a simple generalized form of the Drude formula for the free electron theory, but involving two types of free electrons. If the surface optical constants are not anomalous, this procedure may be interpreted as a so…