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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 444 (1978), S. 217-236 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Correlations between Properties of Chalcogenide Glasses. V. Glass Formation and Phase Separation in the Systems Tl—Ge—Se und Pb—Ge—SeThe glass formation in the systems Tl—Ge—Se and PbSe—GeSe2—Se is investigated applying defined melting conditions. In both systems exist - at high Se and low Ge contents - large regions of liquid immiscibility and microphase separation. The compositions of the interconnected phases were determined by chemical analysis, scanning electron microscopy, and by measurements of Vickers hardness. Transformation temperatures Tg and hardness numbers HMV of homogeneous Tl—Ge—Se glasses are in a linear relationship with the approximate values ΔAH1 for the atomization energies of the samples.
    Notes: Für definierte Schmelzbedingungen wird die Glasbildung in den Systemen Tl—Ge—Se und PbSe—GeSe2—Se beschrieben. Bei hohen Selen- und geringen Germaniumgehalten treten in beiden Fällen ausgedehnte Gebiete mit Mikro- und Makrophasentrennung auf. Zur Festlegung des Konnodenverlaufs in den Mischungslücken werden naßchemische Analysen, rasterelektronenmikroskopische Untersuchungen und Mikrohärtemessungen herangezogen. Für die Transformationstemperaturen Tg und die Mikrohärten HMV homogener Tl—GE—Se-Gläser ergeben sich lineare Abhängigkeiten von den Näherungswerten ΔAH1 für die molare Atomisierungsenthalpie der Proben.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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