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  • 1
    Publication Date: 2001-08-01
    Print ISSN: 0042-207X
    Electronic ISSN: 1879-2715
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Elsevier
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 24 (1982), S. 43-50 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das thermische Verhalten synthetischer Montmorillonite verhältnismässig einfacher chemischer Zusammensetzung wurde untersucht und gedeutet. Montmorillonit wurde durch hydrothermische Synthese bei 300°C und 8.8 MPa in 165 Stunden hergestellt. Durch die Methoden der DTA, DTG, TG, Röntgendiffraktionsanalyse, Infrarotspektroskopie und Elektronenmikroskopie wurde erwiesen, daß synthetische Montmorillonit eine monominerale Probe ist und keine Abweichungen von natürlichem Montmorillonit beobachtet werden konnten.
    Abstract: Резюме Изучено и объяснено т ермическое поведени е синтетического монт мориллонита относительно просто го химического соста ва. Монтмориллонит был п лучен гидротермич еским синтезом в тече нии 165 часов при 300° и давл ении 8.8 МПа. Методами ДТА, ДТГ, ТГ, рентгенодифракци онного анализа, ИК спе ктроскопии и электронной микрос копии доказано, что синтети ческий монтмориллон ит является мономинералом и не от личается от природного.
    Notes: Abstract The thermal behaviour of synthetic montmorillonite of relatively simple chemical composition has been studied and interpreted. Montmorillonite was prepared by hydrothermal synthesis at 300° and 8.8 MPa during 165 hours. With the methods of DTA, DTG, TG, X-ray diffraction analysis, infrared spectroscopy and electron microscopy it was proved that the synthetic montmorillonite is a monomineral sample and no differences from natural montmorillonite were observed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 24 (1982), S. 51-57 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die durch Röntgendiffraktionsanalyse, Infrarotspektroskopie und Elektronenmikroskopie untersuchten Hochtemperatur (950–1500°) — Änderungen in synthetischem Montmorillonit verhältnismässig einfacher chemischer Zusammensetzung werden beschrieben. Es wurde gefunden, daß dieser Montmorillonit dem Typ Wyoming angehört und, daß die Hochtemperaturphasen Cristobalit, Mullit, Anorthit und Spinell enthalten. Aus dieser Probe kristalliesierte bei zweistündigem Erhitzen auf 1500°C nur Mullit.
    Abstract: Резюме С помощью рентгеноди фракционного анализ а, ИК спектроскопии и элек тронн ой микроскопии изуче ны высокотемператур ные изменения (950–1500°) синтет ического монтмориллонита отн осительно простого х имического состава. Найдено, что э тот монтм ориллонит относится к типу Вайоминг, а его высокотемпературны е фазы включают кристобалит, муллит, а нортит и шпинель. При н агревании монтмориллонита в те чении 2 часов при 1500° кристалл изуется только мулли т.
    Notes: Abstract The high-temperature (950–1500°) changes in synthetic montmorillonite of relatively simple chemical composition, studied by X-ray diffraction analysis, infrared spectroscopy and electron microscopy, are described. It was found that this montmorillonite belongs to the Wyoming type and the high-temperature phases involve cristobalite, mullite, anorthite and spinel. Only mullite crystallized from this sample on heating for two hours at 1500°.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 46 (1996), S. 489-493 
    ISSN: 1572-8943
    Keywords: montmorillonite ; thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The paper provides an overview of publications on the DTA of montmorillonites (in the temperature range 20–1100°C), starting with the first experiments of Le Chatelier (1887) and ranging up to the present. Consideration is given to the dehydration, dehydroxylation, amorphization and rehydration of montmorillonite (42 references).
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 50 (1997), S. 505-509 
    ISSN: 1572-8943
    Keywords: silver iodide ; synthetic zeolite ; ZSM5
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract TG, DTG and DTA measurements were used to study the thermal properties of the synthetic zeolite ZSM5, its silver form (Ag-ZSM5) and a zeolitic product containing silver iodide (K-ZSM5/AgI). Thermoanalytical measurements were supplemented by morphology studies.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 55 (1999), S. 861-866 
    ISSN: 1572-8943
    Keywords: decomposition products ; hydrogen tellurates ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In the framework of a systematic study of compounds with hydrogen bonds, thermoanalitycal methods were employed to study four groups of hydrogen tellurates: a) Li2H4TeO6·3H2O, Na2H4TeO6, K2H4TeO6; b) LiH5TeO6, NaH5TeO6·2H2O, KH5TeO6·2H2O; c) NH4HTeO4; d) K4H4Te2O10·7.3H2O. The individual steps in the thermal degradation were described and the intermediates formed were characterized by analytical, infrared spectrometry, powder X-ray and, for NH4HTeO4, also mass spectrometry methods.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 46 (1996), S. 515-520 
    ISSN: 1572-8943
    Keywords: SiO2-aerogel ; synthesis ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Aerogels are extremely porous high-tech materials based on inorganic oxides, especially silica. The paper describes synthesis and properties of SiO2-aerogel, and changes occurring during heating of SiO2-aerogel in the temperature range from 20 to 1000°C. Four thermoanalytical methods were used: Thermodilatometry, Differential thermal analysis, Thermogravimetry and Derivative thermogravimetry.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 55 (1999), S. 773-777 
    ISSN: 1572-8943
    Keywords: aerogel ; calcination ; hydrophylicity ; TG
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Differences in mass loss occurring in the course of dynamic and isothermal heating of SiO2-aerogel and changes of specific surface and hydrophylicity during calcination were studied by thermal analysis. SiO2-aerogel was prepared from tetramethoxysilane (TMOS) hydrolyzed by ammonia solution at 0°C with molar ratio TMOS: H2O:NH4OH 4:1:0.01. Differences are caused mainly by oxidation of organic matter and by diffusion of products of the oxidation. Heat transfer has none or little effect on the differences. Samples calcined at temperatures about 300°C reach maximum hydrophilicity though they still contain small amounts of residual organic matter.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of porous materials 1 (1995), S. 91-95 
    ISSN: 1573-4854
    Keywords: aerogel ; mercury porosimeter ; mechanical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract It is ascertained that the mercury does not enter pores of some aerogels in experiments with mercury intrusion porosimeter. The curves obtained from mercury porosimeter represent the compaction of aerogels under isostatic pressure conditions. Thus, a novel area of research for the application of the mercury porosimeter emerges. The mercury porosimeter is proposed as a convenient tool to study the mechanical properties of aerogels based on the studies of the volume decrease/expansion of an aerogel sample under isostatic pressure deformation to selected pressures.
    Type of Medium: Electronic Resource
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