Einfluß der Blockstruktur auf die Emissionseigenschaften von Laserrubinen

The laser energy of two rubies of different optical quality is measured in the relaxation regime. The adjustment and length of the resonator is varied and the polarisation of the emission is changed definetely. The results are interpreted in terms of mosaic structure and substructure of the rubies.     

Einfluß der Temperung auf die optische Homogenität von Korund-Einkristallen

The influence of annealing corundum rods was investigated in controlling the number of interference stripes. Annealing at least of 1100-1200°C improves optical homogeneity of the perfect crystals. Annealing at 1900-1980°C only slightly improves optical homogeneity of rubies.     

Untersuchungen zum Einfluß von Temperatur und Versetzungen auf die integralen Röntgenintensitäten von Si-Einkristallen

It is possible to determine the Debye-temperature from measurements of the absolute integral X-ray intensities of silicon single crystals. Debye-temperatures of 543 to 533 K were found for a dislocation-free silicon crystal for temperatures between 90 and 296 K. The effect of dislocations on the Debye-temperature in silicon was investigated for various temperatures.     

Einfluß der Substruktur auf die optische Homogenität von Rubin-Laserstäben

The relation between mosaic structure and optical homogenity was measured of 90° ruby laser rod. The optical homogenity was measured by the interferometric method and the mosaic misorientation by Berg-Barrett method and the oscillation spectrometer respectively. The proportionality between the number of the interference stripes and the rotation of the mosaic blocks about an axis perpendicular to the growth axis and crystallographic c-axis was found.     

Einfluß der Transportkinetik auf die Kristallisation von AIIBIVC-Verbindungen beim Gasphasentransport

The reported investigation intended to find tendencies in the influence of thermal and chemical conditions of chemical transport reactions on the growth of ZnSiP₂ and ZnSiAs₂ crystals. A more favourable crystallisation with less intergrowth is proved, if transport gases of the same system — as e.g. ZnCl₂ or SiCl₄ — is used instead of PbCl₂ and TeCl₄. — Depending on the concentration of the transporting medium the largest amount of crystals with lengths of more than 5 mm coincides with the point of lowest transport rate. The number of crystal defects increases with the dimensions of the crystals. — From the experimental results a hypothesis for explaining the locally different growth of crystals of ternary compounds is presented.     

Über die Flächenverteilung von Dekorationskeimen in der Umgebung von Versetzungen

Cleaved and evaporated faces of KCl:Me²⁺ single crystals were decorated with gold. The surface distribution of the decoration grains was investigated electron-microscopically. In the surroundings of the points of emergence of dislocations characteristic changes in the density distribution of the gold grains could be observed. They are described and discussed.     

Über den Einfluß der aliphatischen Carbonsäuren auf die Wachstumsgeschwindigkeit von KBr-Kristallen

The growth rate of {100}-faces of KBr crystals has been found to decrease in the presence of aliphatic carbon acids according to the dependence earlier deduced by one of the authors (Bliznakov 1954; 1958). The passivating effect is greater with acids having a greater number of CH₂-groups. The isotherms of passivation have been obtained at various temperatures. On the basis of experimental data the heat of adsorption of the impurities (acids) at the active growth centers of {100}-faces of KBr crystals have been calculated. The passivating effect is greater with acids which are adsorbed more strongly.     

Einfluß der Vibration auf die Geschwindigkeit der Saccharosekristallisation

The influence of the vibration amplitude on the crystallization rate of saccharose with constant vibration frequency of 100 Hz is investigated. Supersaturation was low (1.05), temperatures 40, 60, and 80 °C. Increase of amplitudes 1 up to 4 mm positively influenced the crystallization rate (by 45%) in solutions of high purity and low temperature. At 80 °C the increase lay at about 20%. With low purity solutions no acceleration was observed. – The apparatus and methods of measuring are described.     

Einfluß der Oberflächenbearbeitung auf die Röntgenstrahl-Totalreflexionsprofile

If X-rays are specular reflected on real surfaces it occurs a broadening of the incident X-ray beam. This broadening is a very sensitive and experimentally simple determinable value, with which it is possible to characterize the quality of light optical mirrors.     

Der Einfluß der Zirkulation auf die Geschwindigkeit der Saccharose-Kristallisation

Crystallization of saccharose from solutions of various purity and at a constant supersaturation (1.15) was studied with variable velocities of rotating crystal solutions. Experiments were carried out in thermostated vessels at 65 °C. With increasing velocities of rotation the rate of crystallization increased likewise. Data are given on the relations between the velocities of the rotating crystal container and the rates of crystallization in solutions of various purities.     

Der Einfluß der Temperatursymmetrie des Verneuilofens auf die Qualität der Korundeinkristalle

Corundum boules were grown in Verneuil furnaces with eliptical cross sections of the isotherms perpendicular to the growth axis. The as grown single crystals were heated with a rate of 250° C/h to a temperature of 1850°C. The number of single crystals wich split during heating was evaluated with regard to the angle ϱ of the c-axis with the growth axis as well as with regard to the angle α. The angle α is enclosed by two planes. The first plane ist established by the growth axis and by the longer axis of the eliptical cross section of the isothermes. The second plane ist established by the crystallographic c-axis and by the growth axis. The greatest stability is always observed with single crystals with the angle α 45°, the lowest with those having α 90° or α 0°.     

Der Einfluß der Reaktorgeometrie auf die Si3N4-Abscheidung

To explain the different efficience and kinetics as they were found in reactors with various geometry the model of thermal diffusion was attracted. The factor of separating, derived from the diffusion equation containing a term of thermal diffusion permits statements on comparability and transferability of reactors. Further it is possible to discuss the influence of temperature on deposition rate different in the various reactors. It is suggested that the wide spectrum of deposition conditions reviewed in literature for similar physical film properties is based on the different reactor geometry used by investigators.     

Einfluß dünnster Oxidschichten auf die Photoelektronenemission von Molybdäneinkristallen

The change of the photoelectron current from molybdenum-(111) and (100)-single crystal surfaces has been studied by emission electron microscopy. LEED investigations in the same apparatur showed that the decrease or increase of the electron emission after thermical cleaning is due to reactions of oxygen on the surfaces.     

Der Einfluß von kapillarinaktiven Beimengungen auf die Kristallisation von Metallschmelzen

After a summary on knowledge about possibilities to modify the texture of founded metals results of authors' investigations about the influence of capillarinactive additives (Mg, Zn) upon the texture of Pb-metal are reported and discussed. The earlier published opinion about the formation of an delaying adsorption-layer at the interface and the higher rate of nucleation depending on it is renewed.