New procesa for cement manufacture
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Materials Literature
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Der schachtofen
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Nuevas técnicas para el estudio del fraguado y endurecimiento de los aglomerantes hidráulicos
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A Theory of Sensitized Luminescence in Solids
The term ``sensitized luminescence'' in crystalline phosphors refers to the phenomenon whereby an impurity (activator, or emitter) is enabled to luminesce upon the absorption of light in a different type of center (sensitizer, or absorber) and upon the subsequent radiationless transfer of energy from the sensitizer to…
Electrical Conductivity of Single Crystals of Graphite
The electrical conductivities along the principal directions of graphite crystals have been measured using a large number of well-developed single crystals obtained from Ceylon. The conductivity along a direction perpendicular to the hexagonal axis is about ${10}^{4}$ times that along the axis. Rectification and other…
Domain Structure of Rochelle Salt and KH2PO4
It has been verified by means of the polarization microscope that rochelle salt in the ferroelectric state consists of many domains. The domain structure in an annealed crystal is caused by the electrostatic self energy. When the electric field along the $X$ direction is increased and then decreased gradually, success…
Dipolar Broadening of Magnetic Resonance Lines in Magnetically Diluted Crystals
Calculations are given for the frequency moments associated with the dipolar broadening of magnetic resonance lines in crystals having lattice points populated at random by identical paramagnetic ions or nuclei. It is found that for fractional magnetic population $f>0.1$ the line shape is approximately Gaussian wit…
Intensities in Raman spectra I. A bond polarizability theory
Abstract Theories of Raman intensities are reviewed, and it is shown that no satisfactory theory exists which enables relative intensities to be predicted. A matrix method for calculating the derived invariants of the molecular polarizability in terms of polarizability functions characteristic of bonds and general coe…
The Electrical Conductivity of MgO Single Crystals at High Temperatures
The variation of electrical conductivity of MgO single crystals is measured as a function of temperature over the range from 300° to 1500°K. Heat pre-treatment is found necessary to stabilize the results at high temperatures. Assuming that the conductivity is electronic and intrinsic the energy gap between the full an…
Interconversion of Hexachlorocyclohexane Isomers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterconversion of Hexachlorocyclohexane IsomersR. R. Whetstone, F. C. Davis, and S. A. BallardCite this: J. Am. Chem. Soc. 1953, 75, 7, 1768–1769Publication Date (Print):April 1, 1953Publication History Published online1 May 2002Published inissue 1 April 1953https://doi.org…
The rate of podzol development in sands of the Woy Woy District, NSW
Soil profiles examined in the parallel sand ridges between Ocean Beach and Woy Woy, N.S.W., show a progressive increase in podzolizatiun as one goes from the beach towards Woy Woy. There is reason to believe that the oldest ridges are about 4000 years old and it is thus possible to suggest a time scale for the leachin…
Mechanism of Film Formation of Latex Paint
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Film Formation of Latex PaintW. A. Henson, D. A. Taber, and E. B. BradfordCite this: Ind. Eng. Chem. 1953, 45, 4, 735–739Publication Date (Print):April 1, 1953Publication History Published online1 May 2002Published inissue 1 April 1953https://pubs.acs.org/doi/10…
The Infrared Spectra of Three Solid Phases of Methyl Ammonium Chloride
Infrared spectra are presented for three crystalline phases of methyl ammonium chloride which occur at different temperatures. The spectrum of the high temperature structure reveals apparently degenerate vibrational frequencies for the perpendicular bands indicating little or no distortion from a threefold symmetry ax…
Dielectric Relaxation and the Internal Field
The paper discusses the relation of the relaxation time τ of a dielectric to the measured decay time of polarization T and proposes a new expression for the internal field in a dielectric subjected to an alternating field. It is found for this expression that 1<T/τ<32 and that in most instances no seriou…
Spin Waves in Ferromagnetic and Antiferromagnetic Materials
A brief outline is given of the spin-wave approximation to the near ground states of ferromagnetism and antiferromagnetism. Simple pictorial models of spin waves are introduced. These models clarify the striking difference between ferromagnetic spin waves, which obey the dispersion law ω ∝ k2, and antiferromagnetic sp…
XLVI. Anomaly in the rigidity modulus of copper alloys for small concentrations
Summary In his recent theory of work hardening, Mott assumes that face-centred cubic crystals usually contain, prior to deformation, a network of dislocations, as suggested first by Frank; and he computes the decrease in the modulus of rigidity due to the existence of such a network. His computation may be extended to…
The origin of specimen contamination in the electron microscope
Electron beam contamination has been studied in simple vacuum systems to determine how it originates and methods by which it may be prevented. It is concluded that the contamination is formed by the interaction of the electrons with organic molecules adsorbed on the bombarded surfaces, the molecules being replenished…
Chemische und mineralogische zusammensetzung und einige charakteristische eigenschaften des sulfathüttenzementes
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Der sulfat-hüttenzement
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Der schachtofen
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