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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of ZnO and ZrO〈sub〉2〈/sub〉 Powders by Mechanochemical Processing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 555 (Sept. 2007), p. 279-284 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The ZnO and ZrO2 powders were prepared by mechanochemical processing andsubsequent heat treatment of the starting powder of precursors mixture of ZnCl2 and Ca(OH)2, andZrOCl2·8H2O and NaOH, respectively. Inert salt matrix, ether CaCl2 or NaCl, which preventsparticle agglomeration was formed during mechanochemical solid state reaction. Aftermechanochemical treatment, samples were calcined at various temperatures. Selective removal ofthe matrix phase by washing the resulting powder with appropriate solvent yields almost pure ZnOand ZrO2 powders. Characterization of the powders was performed by X-ray diffraction (XRD),differential thermal and thermo gravimetric analysis (DTA−TG) and scanning electron microscopy(SEM)
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.555.279.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    XRD Analysis of Calcium Phosphate and Biocomposite Calcium Phosphate/Bioresorbable Polymer (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 518 (July 2006), p. 507-512 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Composite biomaterials based on calcium phosphate ceramic due to their high bioactivityare of interest for biological application and bone tissue repair. Structural and microstructuralparameters of inorganic constituent of these materials are very important for the synthesis andcharacterization of composites. Quantitative and qualitative content, crystallite size of phases, aswell as the degree of crystallinity have a great influence on the quality of composites, theirapplication and bone tissue repair. X-ray diffractometry was employed to investigate thecomponents of biocomposite materials, calcium phosphate (CaP) ceramic and poly-DL-lactide-coglycolide(DLPLG) polymer, as well as the biocomposite obtained from the mentioned components.Composite biomaterial was obtained by modified emulsion process. Using the Rietveld refinement,we analyzed CaP as an inorganic component of the composite, whence we have determinedstructural and microstructural properties of ceramic component of the investigated composite. Theresults obtained by structure refinement show that calcium phosphate ceramic materials synthesizedat room temperature contain hydroxyapatite HAp as a predominant phase. The calculated Ca/P ratiois 1.667. The Rietveld analysis revealed lattice parameters a(Å)=9.4324(7) and c(Å)=6.8785(6) thatare in agreement with the theoretical values
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.518.507.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Low Temperature Aerosol Synthesis of YAG:Ce〈sup〉3+〈/sup〉 Nanostructures: Comparative Study of the XRPD Micro Structural Parameters (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 555 (Sept. 2007), p. 395-400 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this work is to present the results of the comparative analysis ofYAG:Ce3+ microstructural parameters obtained from x-ray powder diffraction (XRPD) data usingRietveld based Koalariet and Fullprof programs. YAG:Ce3+ powder is obtained via lowtemperature aerosol route at 3200C followed by post annealing treatment. The chosen technique ofsynthesis, i.e. ultrasonic spray pyrolysis, provides the generation of spherically shaped andsubmicronically sized particles having composite nanostructure. Since the targeting garnet phaserepresents a very promising host phosphor material being doped with rare-earth ions, the mostimportant criteria determining its applicability in various optical devices is the uniform distributionof the luminescent center in the host lattice as well as the cubic YAG phase crystallinity.Comparison of the data obtained for the same samples by the above mentioned XRPD analysesgives us an insight into the validity of the refined parameters
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.555.395.pdf
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