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  • 1
    Electronic Resource
    Electronic Resource
    Microwave-Assisted Synthesis and Sintering of NZP Compounds (2004)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 87 (2004), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: We have identified the high microwave susceptibility of the sodium di-hydrogen phosphate monohydrate (NHPM), NH2PO4·H2O. This acid phosphate of sodium can be heated to 〉900°C when exposed to 2.45 GHz microwave radiation. Using NHPM and microwave energy, a novel single-step synthesis of many important crystalline NZP compounds has been accomplished in a very short time. Interestingly, the combination of microwaves and nonstoichiometric oxide precursors for the preparation of NZP materials is found to reduce the reaction temperatures and enhance the reaction kinetics further. The microwave synthesis method is found to be simple and fast, minimizing the loss of volatile chemical species from the reaction. A microwave-assisted procedure for the rapid sintering of NZP compounds has also been demonstrated. Densification (〉97%) has been achieved in 〈30 min at sintering temperature much lower than normally required in conventional processes. Finer microstructure and better densification are the main advantages of the microwave sintering in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2004.00834.x
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  • 2
    Electronic Resource
    Electronic Resource
    Sintering of Zirconia Nanopowder by Microwave-Laser Hybrid Process (2004)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 87 (2004), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A new hybrid sintering process has been developed by replacing all but one laser by microwaves in the existing simultaneous multiple laser process (SIMPLE). Microwave energy has been used to preheat the material before laser radiation, and the synergism between microwave and laser energies could effectively heat the material to temperatures of 1700°C and beyond in just a few minutes. Using this process, rapid sintering of 3Y–ZrO2 (3Y–TZP) pellets has been achieved in a few minutes. Microstructural investigations reveal that the microwave–laser hybrid sintered pellets of 3Y–ZrO2 have nanograins averaging about 20 nm. The microwave–laser hybrid sintering process can clearly be a new approach for fabrication of nanoceramics and nanocomposites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2004.01806.x
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of Titanium Nitride: Microwave-Induced Carbothermal Reaction of Titanium Dioxide (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Carbothermal reduction and nitridation of TiO2 was performed in a 2 kW, 2.45 GHz microwave furnace. Carbon, generally added for the removal of oxygen from TiO2 lattice also served as the low-temperature susceptor in these experiments. At temperatures 〉1200°C, the mixtures started reacting vigorously (self-burn), which was never observed with the respective pure compounds. In the self-burning state, the minimum duration required for complete titanium nitride transformation was ∼20 min with stoichiometric amounts of carbon. With excess C, the transformation duration dropped to just 1 min. CO removal and subsequent Ni fixation occur more directly in microwave-induced reactions than in conventional nitridation procedures. Intermediate formation of successive Magneli phases (Ti2nO2n−1) was not found in the microwave-induced reactions. The combination of microwave processing and combustion makes this route of economical interest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00051.x
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  • 4
    Electronic Resource
    Electronic Resource
    Combustion Synthesis of Hexaaluminate Phosphors (1999)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 82 (1999), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Green phosphors of the composition Ce1-xTbxMgAl11O19 (0.1 〈 x 〈 0.6) were prepared via self-propagating (combustion) synthesis, using urea as a fuel. The phosphors that were produced via the combustion route were fine powders and produced a luminous intensity of 72%, compared to an optimized commercial phosphor. The excitation spectra were characteristic of the Ce3+ cation; however, no Ce3+ emission was observed. Energy transfer from the Ce3+ cation to the Tb3+ cation was complete, and only the 542 nm Tb3+ emission was observed. Concentration quenching occurred with x 〉 0.5. Scanning electron microscopy images showed a well-crystallized, platelike morphology, with a particle size of 10-20 µm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1999.tb01881.x
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  • 5
    Electronic Resource
    Electronic Resource
    Microwave Effects in Lead Zirconium Titanate Synthesis: Enhanced Kinetics and Changed Mechanisms (2001)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 84 (2001), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A novel, simple, and fast solid-state procedure has been demonstrated for the synthesis of Pb(Zr,Ti)O3 (PZT), using microwave radiation. The process consists of starting with the respective oxides mixed in the required proportions and exposing the charge to the microwaves. By making one or more of the constituent oxides slightly nonstoichiometric, enormous enhancement in reaction rates has been achieved, and single-phase PZT can be synthesized at temperatures as low as 600°C. Moreover, it has been shown that the combined use of nonstoichiometric precursors and microwave irradiation leads to different reaction pathways for the formation of PZT. Further, the microwave method diminishes PbO loss.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2001.tb00816.x
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  • 6
    Electronic Resource
    Electronic Resource
    “Biomimetic” materials: A potential distortion of materials policies (1991)
    Weinheim : Wiley-Blackwell
    Advanced Materials 3 (1991), S. 448-451 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19910030911
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  • 7
    Electronic Resource
    Electronic Resource
    Science publishing needs a reformation (1993)
    Weinheim : Wiley-Blackwell
    Advanced Materials 5 (1993), S. 141-143 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19930050216
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  • 8
    Electronic Resource
    Electronic Resource
    Science of materials, Witold Brostow, wiley-interscience, New York, 1979, 436 pp. price: $29.50 (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 17 (1979), S. 539-539 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.130170811
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  • 9
    Electronic Resource
    Electronic Resource
    Concise encyclopedia of materials economics, policy and management. Edited by Michalel B. Bever, Pergamon Press, Oxford 1993, XXVII, 460 pp., hardcover, $ 240, ISBN 0-08-037 056-X (1994)
    Weinheim : Wiley-Blackwell
    Advanced Materials 6 (1994), S. 86-86 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19940060122
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  • 10
    Electronic Resource
    Electronic Resource
    Verbindungsbildung und Phasengleichgewicht in den Systemen Cr2O3—H2O, Sc2O3—H2O und Tl2O3—H2O (1954)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 276 (1954), S. 275-288 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die binären Systeme Cr2O3—H2O, Sc2O3—H2O und Tl2O3—H2O wurden an Hand gutbekannter hydrothermaler Methoden studiert, die es ermöglichten, Gesetzmäßigkeiten innerhalb der Phasengleichgewichte zu ermitteln.Im System Cr2O3—H2O konnten die drei stabilen Phasen Cr(OH)3, CrO(OH) und Cr2O3 bestätigt und ihre Stabilitätsbereiche als eine Funktion von Druck und Temperatur bestimmt werden.Eine Verbindung der Formel Sc(OH)3 wurde nicht aufgefunden. Die Struktur des ScO(OH) ließ sich dem Diaspor-Typ zuordnen, seine Gleichgewichtskurve bei der Zersetzung zu Sc2O3 wurde festgelegt.Es konnte bestätigt werden, daß Tl2O3 keinerlei Hydrate zu bilden vermag.Die Strukturen von Oxyden, Oxydhydroxyden und Hydroxyden dreiwertiger Elemente wurden miteinander verglichen und in schematischer Form dargestellt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19542760508
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