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  • II–VI semiconductor  (1)
  • NPK fertilizers  (1)
  • densification  (1)
  • Springer  (3)
  • Elsevier
  • National Academy of Sciences
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Keywords
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  • Springer  (3)
  • Elsevier
  • National Academy of Sciences
Years
  • 1
    Electronic Resource
    Electronic Resource
    Compression testing of granular NPK fertilizers (1997)
    Springer
    Nutrient cycling in agroecosystems 48 (1997), S. 231-234 
    Details
    ISSN: 1573-0867
    Keywords: break strength ; compressiontesting ; conditioners ; fertilizer caking ; NPK fertilizers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The crush strength of granular NPK fertilizer has been accurately determined using Instron compression testing equipment. Stress-strain analysis shows a distinctive break point followed by break up of granule fragments. The force required to crush the granules is a function of the granule diameter but the calculated pressure required to crush each granule remained relatively constant. Factors such as moisture ingress and coating oils have been shown to affect granule strength. A direct link between caking of granular fertilizers and crush strength has been established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009714306464
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    CdS semiconductor nanoparticles in silica sonogel matrices (1994)
    Springer
    Journal of sol gel science and technology 2 (1994), S. 689-694 
    Details
    ISSN: 1573-4846
    Keywords: II–VI semiconductor ; ultrasounds ; quantum dots ; nanoparticles ; DCCA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract SiO2 gels obtained by sonocatalytic method combined with DCCA were used as host-matrices for extremely fine dispersions of CdS semiconductor particles. Small crystallites were produced “in situ” by H2S gas diffusion method. The particles were characterized by TEM and HRTEM, EXAFS, UV-Vis and Raman spectroscopies. The size of crystallites ranged from 5 to 10 nm. The optical transmission spectra showed the characteristic blue shift as a function of the particles size, as predicted by the theory. The optical and mechanical qualities of the samples were substantially improved by an infiltration method using a sono-sol which sealed the superficial pores thus ensuring greater longevity and the possibility of obtaining transparent gels by polishing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486333
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Obtaining and sintering yttria stabilized zirconia (YSZ) powders from alkoxides (1994)
    Springer
    Journal of sol gel science and technology 2 (1994), S. 347-352 
    Details
    ISSN: 1573-4846
    Keywords: zirconia ; sintering ; densification ; heat treatment ; yttria stabilized zirconia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Amorphous zirconia ceramics powders containing 3 and 6 mol% yttria were prepared by controlled hydrolysis of alkoxides. Characterization of these powders was carried away by Thermal Analysis, X-ray Diffraction, Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDAX™). The calcination temperature was optimized for compaction at a temperature ranging from 500–800°C. 3% molar YSZ powders from alkoxide, that attained 98% of the theoretical bulk density, showed the best behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486268
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    Paper (German National Licenses)
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