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  • 1
    Electronic Resource
    Electronic Resource
    Phase relations in the system V/Nb/O. V. Investigation of mixed crystals V1-xNbxO2 (1999)
    Springer
    Fresenius' journal of analytical chemistry 363 (1999), S. 202-205 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mixed crystals V1-xNbxO2 exist over the whole area of the quasibinary line VO2-NbO2. The existence of Nb5+ beside V3+ and V4+ on the V-rich side and V3+ beside Nb5+ and Nb4+ on the Nb-rich side of the mixed crystals is demonstrated by XANES-measurements. The compound VNbO4(V0.5Nb0.5O2) is described as a double oxide with vanadium only as V3+ and niobium only as Nb5+. At this point the electric resistivity of the solid solution shows a maximum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051172
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  • 2
    Electronic Resource
    Electronic Resource
    Zustandsbarogramme — Zustandsdiagramme durch Gesamtdruckmessungen (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 595-604 
    Details
    ISSN: 1572-8943
    Keywords: Bi/Se/I ; Bi/Se/O ; chemical transport ; phase bragrams ; phase diagrams ; total pressure measurements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract From phasebarograms it is possible to construct phase diagrams. We show on example of the system Bi/Se/O how follow ternary sections from the total pressure measurements in equilibrium and how we can attribute the barogram of the ternary region Bi2Se3/Bi2O2Se/Se to the binary system Bi2Se3/Se. The knowledge of the ternary system Bi/Se/I and its coexistent pressure courses allow to followT-p-x conditions for the chemical transport of phases from this system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01984001
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  • 3
    Electronic Resource
    Electronic Resource
    Zum chemischen Transport von Yttriumtrichlorid mit Aluminiumtrichlorid (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 659-664 
    Details
    ISSN: 0044-2313
    Keywords: Yttrium trichloride ; chemical transport ; gaseous complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemical Transport of Yttrium Trichloride by Aluminium TrichlorideYttrium trichloride is transported by gaseous aluminium trichloride in the temperature range of 300°C to 700°C from hot to cold. It is followed a gaseous complex YAl4Cl15,g and the enthalpy of formation as well as the standard entropy of the complex from the dependence of the transport rate on the temperature and the initial pressure of Al2Cl6,g.
    Notes: Yttriumtrichlorid ist mit gasförmigem Aluminiumtrichlorid im Temperaturbereich von 300°C bis 700°C von höherer zu tieferer Temperatur chemisch transportierbar. Aus der Abhängigkeit der Transportrate von der Temperatur und vom Gesamtdruck wird ein Gasphasenkomplex YAl4Cl15,g gefolgert und seine Bildungsenthalpie und Standardentropie hergeleitet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210426
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen zur thermischen Zersetzung der Ammoniumyttriumhalogenide I. Ammoniumyttriumchloride (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 665-670 
    Details
    ISSN: 0044-2313
    Keywords: Ammonium yttrium chlorides ; thermal decomposition ; thermochemical data ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation on the Thermal Decomposition of Ammonium Yttrium Halides. I. Ammonium Yttrium Chlorides(NH4)3YCl6 decomposes in first step to the solid phase NH4Y2Cl7,s and gaseous NH3,g and HClg. NH4Y2Cl7,s decomposes in a second step to YCl3, NH3 and HCl. The decomposition-pressure-functions are given and from this the enthalpies of formation and the standard entropies of the phases are derived.
    Notes: Die thermische Zersetzung von (NH4)3YCl6,f erfolgt in erster Stufe in Koexistenz mit NH4Y2Cl7,f unter NH3,g und HClg-Abspaltung. NH4Y2Cl7,f zersetzt sich in einer weiteren Stufe in YCl3,f und NH3,g sowie HClg. Die Zersetzungsdruckfunktionen werden als lgp- und lgKp-1/T-Funktionen dargestellt und daraus die Bildungsenthalpien und Standardentropien der Phasen hergeleitet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210427
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  • 5
    Electronic Resource
    Electronic Resource
    Thermisches Verhalten und Kristallstruktur von YAl3Cl12 (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1414-1420 
    Details
    ISSN: 0044-2313
    Keywords: Yttrium chloroaluminate ; crystal structure ; solution calorimetry ; thermodynamic data ; phase diagram ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermal Behaviour and Crystal Structure of YAl3Cl12We determined the thermodynamic data of YAl3Cl12 ΔHYOAl3Cl12,298 = -739.9 ± 3 kcal/mol and SYOAl3Cl12,298 = 136.1 ± 4 cal/K · mol by total pressure measurements and ΔHYOAl3Cl12,298 = -739.1 ± 1.6 kcal/mol by solution calorimetry. Using DTA-investigations we established the phase diagram in the system AlCl3-YCl3. The crystal structure was refined on the basis of single crystal data (P31 12; Z = 3; a = 1 046.8(2); c = 1 562.3(3) pm).
    Notes: Mit phasenreinem YAl3Cl12 werden Zersetzungsdruckmessungen im Membrannullmanometer und lösungskalorimetrische Messungen zur Bestimmung der thermodynamischen Daten der Verbindung durchgeführt, wobei wir aus den Druckmessungen ΔHYOAl3Cl12,298 = -739,9 ± 3 kcal/mol und SYOAl3Cl12,298 = 136,1 ± 4 cal/K · mol ermitteln und lösungskalorimetrisch ΔHYOAl3Cl12,298 = -739,1 ± 1,6 kcal/mol herleiten. DTA-Untersuchungen dienten der Aufstellung eines Phasendiagrammes im System YCl3—AlCl3.Anhand der Einkristalldaten wurde die Struktur verfeinert (P3112; Z = 3; a = 1 046,8(2); c = 1 562,3(3) pm).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210822
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur thermischen Zersetzung der Ammoniumyttriumhalogenide II. Ammoniumyttriumiodid (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1808-1812 
    Details
    ISSN: 0044-2313
    Keywords: Ammonium Yttrium Iodide ; thermal decomposition ; thermochemical data ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation on the Thermal Decomposition of Ammonium Yttrium Halides II. Ammonium Yttrium Iodide(NH4)3YI6 decomposes directly into YI3,s NH3,g and HI,g. In connection with the thermal decomposition of NH4I the decomposition-pressure-function is given and the enthalpy of formation and the standard entropy of the phases are derived.
    Notes: Die thermische Zersetzung des Ammoniumyttriumiodides (NH4)3YI6 erfolgt direkt in YI3,f, NH3,g und HI,g. Im Anschluß an die thermische Zersetzung von NH4I werden die Zersetzungsdruckfunktionen dargestellt und die Bildungsenthalpien und Standardentropien der Phasen hergeleitet.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956211034
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  • 7
    Electronic Resource
    Electronic Resource
    Zum System Zn/Mo/O. I. Phasenbestand und Eigenschaften der ternären Zinkmolybdate; Struktur von Zn3Mo2O9 (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1274-1280 
    Details
    ISSN: 0044-2313
    Keywords: Phase investigation ; phase diagram ; crystal structure ; differential thermo analysis ; zinc molybdate ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the System Zn/Mo/O. I. Phases and Properties of Ternary Zinc Molybdates; Crystal Structure of Zn3Mo2O9Several ternary compounds are known in the Zn/Mo/O-system. The phases ZnMoO4, Zn2Mo3O8 and Zn3Mo2O9 are stable at 900°C. The coexistence ranges are shown in the ternary phase diagram. The structure of Zn3Mo2O9 has been determined by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P21/m (a = 7,757(1) Å, b = 7,132(1) Å, c = 8,370(2) Å, β = 117,40(1)º, Z = 2).
    Notes: Im System Zn/Mo/O sind mehrere ternäre Phasen bekannt. Bei 900°C sind die Phasen ZnMoO4, Zn2Mo3O8 und Zn3Mo2O9 stabil. Die Koexistenzgebiete sind am ternären Phasendiagramm dargestellt. Die Strukturbestimmung von Zn3Mo2O9 erfolgte mit Röntgenbeugung an Einkristallen. Die Verbindung kristallisiert in der monoklinen Raumgruppe P21/m (a = 7,757(1) Å, b = 7,132(1) Å, c = 8,370(2) Å, β = 117,40(1)º, Z = 2).
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220728
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zum quasibinären System Bi2Se3/BiCl3 (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 169-173 
    Details
    ISSN: 0044-2313
    Keywords: Bismutselenidechlorides ; phase diagram ; barogram ; total pessure measurements ; thermodynamic data ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the Pseudobinary System Bi2Se3/BiCl3The phase diagram of the pseudobinary system Bi2Se3/BiCI3 was investigated by DTA, total pressure measurements and x-ray phase analysis. The two ternary phases BiSeCI and Bi8Se9CI6 melt incongruently at 395 and 540 degree, respectively. Heats of formation and standard entropies were calculated from vapor pressure data. The data see «Inhaltsübersicht».
    Notes: Aus den Ergebnissen von DTA-Untersuchungen, Gesamtdruckmessungen mit dem Membrannullmanometer und der Röntgenphasenanalyse wurde das Phasendiagramm des quasibinären Systems Bi2Se3/BiCl3 aufgestellt. Im System existieren die beiden ternären Phasen BiSeCl und Bi8Se9Cl6, die peritektisch bei 395 bzw. 540°C schmelzen. Die Auswertung der Koexistenzzersetzungsdruckfunktionen ergab die Bildungsenthalpien und Standardentropien: ΔH°B (BiSeClf,298) = -43,4 ± 1,5 kcal/mol.S° (BiSeClf,298) = 34,7 ± 2,2 cal/K · mol.ΔH°B (Bi8Se9Cl6,f,298) = -292,7 ± 6,0 kcal/mol.S° (Bi8Se9Cl6,f,298) = 269,7 ± 6,0 cal/K · mol.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230128
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  • 9
    Electronic Resource
    Electronic Resource
    Untersuchungen zum ternären System Bi/Te/O. I. Das Zustandsdiagramm des quasibinären Schnittes Bi2O3/TeO2 (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 174-178 
    Details
    ISSN: 0044-2313
    Keywords: Bismuth tellurites ; phase diagram ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations to the Ternary System Bi/Te/O. I. The Phase Diagram of the Pseudobinary System Bi2O3/TeO2For the pseudobinary system Bi2O3/TeO2 have been studied the compounds by x-ray and thermal analysis and concluded the phase diagram. Besides the known phases Bi10Te2O19, Bi16Te5O34, Bi2TeO5-Bi2Te2O7, Bi2Te4O11 and two Bi2O3-rich mixedcrystals Bi2(1-x)TexO(3+x) we found the following new ternary phases in the described system: 6 Bi2O3 · TeO2 = Bi12TeO20 and β-Bi16Te5O34.
    Notes: Auf dem quasibinären Schnitt Bi2O3/TeO2 wurde durch Temperversuche und chemischen Transport der Phasenbestand untersucht und mittels thermischer Analysenmethoden ein Zustandsdiagramm erstellt. Neben den bereits bekannten Verbindungen Bi10Te2O19, Bi16Te5O34, Bi2TeO5-Bi2Te2O7, Bi2Te4O11 sowie zwei Bi2O3-reichen Mischkristallen Bi2(1-x)TexO(3+x) bei hohen Temperaturen wurden eine neue ternäre Phase mit der Zusammensetzung 6 Bi2O3 · TeO2 = Bi12TeO20 und ein β-Bi16Te5O34 identifiziert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230129
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  • 10
    Electronic Resource
    Electronic Resource
    Entwicklung eines wissensbasierten Informationssystems zur rechnerischen LebensdauervorthersageHerrn Prof. Dr.-Ing. Otto Buxbaum zu seinem 60. Geburtstag gewidmet. (1995)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 26 (1995), S. 450-458 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Development of a Knowledge Based Information System for Fatigue Life Prediction SummaryThe automotive manufacturer oppose the increasing competition with shorter development times and reduced costs. For this new development tools are necessary specially for the reduction of the experimental development expenditure. If computer aided fatigue life prediction methods supply reliable fatigue life values the experimental stage of development can be reduced. These computer simulations have to include internal experiences, of companies rules of improvement, facts, experimental results and the proved calculation methods. Together with the Adam Opel AG in Rüsselsheim the Fraunhofer-Institut für Betriebsfestigkeit has developed the knowledge based information systems FALIXS (FAtigue LIfe EXpert System) for fatigue life prediction of automotive components. It is an effective tool for the design fatigue resistant structures.
    Notes: Die Fahrzeughersteller versuchen dem zunehmenden Konkurrenzdruck auch durch kürzere Entwicklungszeiten und reduzierte Entwicklungskosten zu begegnen. Um dieses Ziel zu erreichen, bedarf es neuer Entwicklungswerkzeuge, mit denen insbesondere der experimentelle Entwicklungsaufwand reduziert wird. Mit der Möglichkeit, zuverlässig die Lebensdauer rechnerisch zu bestimmen, ließe sich die Versuchsphase der Bauteilentwicklung verkürzen. In solche Rechnersimulationen müssen die innerbetrieblichen Erfahrungen, Bewertungsregeln, Fakten, Versuchsergebnisse und die bewährten Rechenmethoden einfließen. In Zusammenarbeit mit der Adam Opel AG in Rüsselsheim hat das Fraunhofer-Institut für Betriebsfestigkeit das wissensbasierte Informationssystem FALIXS (FAtigue LIfe EXpert System) zur rechnerischen Lebensdauervorhersage von Fahrzeugteilen entwickelt, ein wirkungsvolles Entwicklungswerkzeug zur betriebsfesten Bauteilbemessung.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19950260808
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