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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 123 (1992), S. 306-308 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thermochimica Acta 209 (1992), S. 277-284 
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thermochimica Acta 209 (1992), S. 285-294 
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thermochimica Acta 203 (1992), S. xix-xxiv 
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Vorgesinterte Stäbe von Oxidmischungen des Systems (Fe, Mn)2O3-(Bi, B)2O3 wurden mit einem Laser in einem Rhodiumdraht-Mikroofen tiegelfrei geschmolzen. Der Schmelztropfen wurden durch Pressen zwischen zwei Kupferplatten an den Enden einer Zange innerhalb des kugelförmigen Strahlungsreflektors abgeschreckt. Mit zunehmender Abkühlungsgeschwindigkeit von 102 bis (geschätzt) 104 K s−1 verschwanden nacheinander die kristallinen Phasen Fe2O3, Fe4Bi2O9 und FeBiO3. Substitution von Bi und B und von Fe durch Mn verändert die Phasenzusammensetzung und erleichtert die Glasbildung. Die Gläser zeigen antiferroelektrische Wechselwirkungen; beim FeBiO3 sind die magnetischen Messungen auf der Grundlage eines schwachen Ferromagnetismus zu erklären, der wahrscheinlich durch die gekippten Spins der antiferromagnetischen Teilgitter verursacht ist.
    Abstract: Резюме Предварительно подв ергнутые спеканию стержни оксидной сме си в системе (Fe, Mn)2O3-(Bi, B)2O3, с помощью лазер а были расплавлены в подвешенном состоян ии в родиево-проволочном микронагревателе. Ра сплавленная висячая капля была за тем резко охлаждена путем прес сования ее между двум я небольшими медными п ластинками, смонтиро ванными на кончиках пинцетов с внутренней стороны сферического отража теля. Установлено, что кристаллические фазы Fe2O3, Fe4Bi2O9 и FeBiO3 непрерывло исчезают с увеличением скорости охлаждения от 102 град · сек−1 до мак симально предельного значени я 104 град · сек−1. Замещение висмута на бор и железа на марган ец, в значительной степен и изменяет сотношени е фаз и способствует ст еклообразованию. Так ие стекла обладают магнитными свойствами типа антиферромагнетико в. Только FeBiO3 проявляет магнетизм, объяснимый на основе слабого ферромагнетизма, воз можно обусловленног о скошенными спинами антиферрома гнитной подрешетки.
    Notes: Abstract Presintered rods of oxide mixtures in the system (Fe, Mn)2O3-(Bi, B)2O3 were melted crucible-free with the help of a laser while suspended in a rhodium-wire microheater. The molten hanging drop was then quenched by pressing between two small copper plates mounted at the ends of tweezers inside a globular reflector. The crystalline phases of Fe2O3, Fe4Bi2O9 and FeBiO3 gradually disappeared when the cooling rate was increased from about 102 to an estimated maximum of 104 deg s−1. Substitution of B instead of Bi, and Mn instead of Fe, substantially changes the phase relations and facilitates glass-formation. The glasses exhibit magnetic inleractions of antiferromagnetic type; only FeBiO3 provides magnetic measurements explainable on the basis of weak ferromagnetism, probably caused by canted spins of the antiferromagnetic sublattice.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 575-582 
    ISSN: 1572-8943
    Keywords: kinetics ; shapes of TG curves
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Unter theoretischen Aspekten bezüglich derjenigen Faktoren, die die experimentelle Auflösung thermogravimetrischer Kurven beeinflussen, wird ein möglicher Weg zur Steigerung der Genauigkeit thermogravimetrischer Untersuchungen diskutiert.
    Notes: Abstract From a theoretical consideration concerning the factors affecting the experimentally resolved shapes of thermogravimetric curves, the possible way to increase the accuracy of the thermogravimetric measurements were discussed.
    Type of Medium: Electronic Resource
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