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  • Amphiphilic Polymers  (2)
  • Ferroelectric Ceramics  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Advanced Materials 1 (1989), S. 180-192 
    ISSN: 0935-9648
    Keywords: Aerosol Decomposition ; Superconducting Films ; Oxygen Diffusion ; Ferroelectric Ceramics ; Ferrimagnetic Ceramics ; Powder Generation ; 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
    Notes: Complex metal oxides, including ferroelectric, ferrimagnetic and superconducting ceramics, have a variety of technologically useful properties that can be exploited for a number of applications. Fabrication of complex metal oxide ceramics with specific properties requires high-purity powders with controlled chemical compositions, size distributions, and morphologies. Powders with these characteristics can be produced by aerosol processes in which fine particles are generated in gaseous flow systems. The particles can also be deposited from the gas phase onto surfaces to form films. This paper will discuss the use of aerosol processes for the generation of complex metal oxide powders. A review of aerosol processes will be presented first, followed by a discussion of the methods used for the generation of superconducting ceramic powders. Examples include the production of YBa2Cu3O7, La1.85Sr0.15CuO4, and Tl-Ca-Ba-Cu-O powders and films. Emphasis will be placed on defining the conditions required for the generation of chemically homogeneous particles with controlled morphologies.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Advanced Materials 2 (1990), S. 132-138 
    ISSN: 0935-9648
    Keywords: Ferroelectric Ceramics ; Grain Boundary Capacitances ; Ceramic Electrolytes ; Surface Layers on Glasses ; Ferromagnetic Ceramics ; 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
    Notes: Electroceramics are advanced materials whose properties and applications depend on the close control of structure, composition, ceramic texture, dopants and dopant (or defect) distribution. Impedance spectroscopy is a powerful technique for unravelling the complexities of such materials, which functions by utilizing the different frequency dependences of the constituent components for their separation. Thus, electrical inhomogeneities in ceramic electrolytes, electrode/electrolyte interfaces, surface layers on glasses, ferroelectricity, positive temperature coefficient of resistance behavior and even ferrimagnetism can all be probed, successfully, using this technique.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Advanced Materials 3 (1991), S. 182-190 
    ISSN: 0935-9648
    Keywords: Peptide Synthesis ; Suported Catalysts ; Synthetic Strategies ; Amphiphilic Polymers ; Polymer Reactivity ; 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
    Notes: Conventional polymer supports (polymeric reagents, functional polymers) such as polyacrylamides and polystyrene are based on either strongly polar or nonpolar chemical structures. As a result, these polymers may show low reactivity and poor performance due to their relatively limited ranges of solvent and substrate compatibility. More-recently introduced products are designed on the basis of copolymer structures, which incorporate both polar and nonpolar (hydrophilic and hydrophobic) residues and possess general solvent and substrate compatibility. Due to their ease of production, general solvent and substrate compatibility and improved performance, these new “amphiphilic” copolymers provide new impetus in the study and applications of polymer supports and functional polymers.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0935-9648
    Keywords: Amphiphilic Polymers ; Rod-like Polymers ; LCPs ; Stability of LB Films ; 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
    Notes: The use of preformed polymers for the preparation of Langmuir-Blodgett (LB) multilayers is reviewed. Principles for polymer self-organization are outlined and the appropriate molecular designs are discussed. Recent developments in the different classes of polymers for LB multilayers are presented, and their outstanding properties highlighted.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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