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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 8 (1973), S. 88-92 
    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 From optical studies on polished cross sections of synthetic diamond crystals the diamond growth on three different crystallographic planes can be distinguished within the crystals. Diamond growth on the cubic, octahedral, and dodecahedral faces each have a characteristic abrasion resistance, colour, and inclusion content. The differences in abrasion resistance do not appear to be dependent on the content of dispersed nitrogen. The characteristic growth on each crystal face allows the relative growth history of the three faces to be reconstructed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 8 (1962), S. 183-189 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The catalytic dehydrations of n-butanol, n-propanol, and ethanol to produce water and the respective olefins were studied for the temperature range 400° to 700°F. and over the pressure range 1 atm. to 100 lb./sq. in. gauge. Silica-alumina catalyst in bead form was used. Dehydration rates were found to be consistent with a single-site surface reaction-controlled mechanism in which was superimposed a mass transfer effect internal to the catalyst pellets. Rate constants for the three reactions are presented. The significances of their relative values and their temperature and pressure dependencies are discussed.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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