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  • 1
    Electronic Resource
    Electronic Resource
    Metalorganic vapor-phase epitaxial growth and photoluminescent properties of Zn1−xMgxO(0≤x≤0.49) thin films (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2022-2024 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-quality Zn1−xMgxO(0.00≤x≤0.49) thin films were epitaxially grown at 500–650 °C on Al2O3(00⋅1) substrates using metalorganic vapor-phase epitaxy. By increasing the Mg content in the films up to 49 at. %, the c-axis constant of the films decreased from 5.21 to 5.14 Å and no significant phase separation was observed as determined by x-ray diffraction measurements. Furthermore, the near-band-edge emission peak position showed blueshifts of 100, 440, and 685 meV at Mg content levels of 9, 29, and 49 at. %, respectively. Photoluminescent properties of the alloy films are also discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1405811
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  • 2
    Electronic Resource
    Electronic Resource
    On the nature of alkylsulfonate adsorption at the rutile/water interface (1991)
    s.l. : American Chemical Society
    Langmuir 7 (1991), S. 3138-3143 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00060a037
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  • 3
    Electronic Resource
    Electronic Resource
    Deformation in the hysteresis loop of Pt/Pb(Zr,Ti)O3/Pt thin-film capacitors (1999)
    Springer
    Journal of materials science 18 (1999), S. 1033-1035 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006623509920
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  • 4
    Electronic Resource
    Electronic Resource
    SiC fibre-reinforced lithium aluminosilicate matrix composites fabricated by the Sol-Gel process (1995)
    Springer
    Journal of materials science 30 (1995), S. 1009-1017 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract SiC fibre-reinforced lithium aluminosilicate (LAS) matrix composites were fabricated by (i) the hydrolysis-condensation reaction of relevant metal alkoxides, and (ii) the non-aqueous condensation route using diphenylsilanediol. Optimum reaction conditions of LAS sol formation for thin coating applications in the hydrolysis-condensation route were derived from rheological measurements. The SiC fibre-LAS composite fabricated by the hydrolysis-condensation route shows a uniform microstructure. The debonding/fibre pullout was more pronounced in the niobium-doped composites. The fracture toughness,K 1c, also increased from 11 MPa m1/2 for the undoped composite to 16 MPa m1/2 for the 5 wt% Nb-doped composite, suggesting that the fibre pullout contributes significantly to the toughening of SiC fibre-LAS composites. The crystallization of matrix at high temperatures (after hot pressing at 800
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178438
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  • 5
    Electronic Resource
    Electronic Resource
    Alumina–mullite–zirconia composites: Part II Microstructural development and toughening (1997)
    Springer
    Journal of materials science 32 (1997), S. 503-511 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Densification characteristics and fracture toughness of the alumina–mullite–zirconia (AMZ) composites fabricated by the colloidal mixing route were examined. The densification of boehmite–silica–zirconia precursor compacts was characterized by three distinct stages. Stage I was represented by a rapid shrinkage between 1100 and 1300°C and was caused by the viscous flow sintering of the SiO2 component. Stage II was characterized by a temporary cessation of the shrinkage caused by the mullitization. Stage III was represented by a restoration of the shrinkage for temperatures above 1450 °C. The α-Al2O3 seeding facilitated the formation of elongated grains in the AMZ composites, and these elongated grains correspond to α-Al2O3. The toughening caused by the microcrack nucleation was comparable to that by the t → m martensitic transformation and increased with increasing total content of zirconia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018590408443
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  • 6
    Electronic Resource
    Electronic Resource
    Lyotropic effect in surface charge, electrokinetics, and coagulation of a rutile dispersion (1994)
    Springer
    Colloid & polymer science 272 (1994), S. 554-561 
    Details
    ISSN: 1435-1536
    Keywords: Coagulation ; electrokinetics ; interfacial layer ; lyotropic effect ; rutile
    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 Potentiometric, electrokinetic, and coagulation experiments with a rutile dispersion in the pH region above the point of zero charge exhibit an “inverse” lyotropic sequence for counterions: Li+〉K+〉Cs+. The potentiometric and electrokinetic data were interpreted by a surface complexation model assuming the Stern-Gouy-Chapman structure of the interfacial layer, which yielded the values of inner layer capacitances,C, and the intrinsic equilibrium constants,K ass 0 , characterizing the specificity of each counterion. These parameters were used to explain the order of lyotropic sequences in the adsorption, coagulation, and electrokinetic phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00653221
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  • 7
    Electronic Resource
    Electronic Resource
    Alumina-mullite-zirconia composites (1996)
    Springer
    Journal of materials science 31 (1996), S. 5083-5092 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A boehmite-silica-zirconia precursor powder with a uniform spatial distribution of constitutive phases was prepared from the corresponding ternary sol by compressing the electrical double layer (EDL) without altering the magnitude of the surface potential at a pH of 3.5. Both the rheological data and the calculated potential energy of interaction indicated that the mixed ternary sol formed weakly coagulated units in a shallow potential energy well after the compression of EDL at a pH of 3.5. The effects of α-Al2O3 seeding on the phase-formation characteristics were then systematically examined. It was observed that the α-Al2O3 seeding facilitated the formation of α-Al2O3 but that it suppressed the growth of mullite in the alumina-mullite-zirconia composite. These observations were attributed to the epitaxial effect of α-Al2O3 seeds which preferentially induced the formation of corundum phase over mullite formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00355909
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