The chemistry of ceramic glazes

  • Naseef J. Ali

    Student thesis: Doctoral ThesisDoctor of Philosophy

    Abstract

    The development of ideas and theories concerning the structure of glazes, as one of the glassy materials, are reviewed in the general introduction. The raw materials and the manufacturing process for glazes are described (Chapter One). A number of new vanadyl(IV) dipyridylamine and tripyrldylamine complexes have been prepared, various
    spectroscopic techniques are used in the investigation
    of the vanadyl ion in a weak ligand field, the situation
    of those found in a glaze environment (Chapter Three). In glaze recipes containing silica, potash feldspar, china clay, MO(M= Ca, Sr, Sa, Ti and Zn) and NiO, the ligand field theory is used in the elucidation of the
    effect of M (in MO) on the absorption spectra and coordination behaviour of Ni(II) in glazes. The magnetic
    and visible spectral results are reviewed in terms of Dietzel's idea of field strength of M and also in terms of Shteinberg's theory of glaze structure. X-ray diffraction is used for the identification of various species
    that formed after the firing process of glazes (Chapter
    Four). In Chapter Five, [] Mossbauer spectroscopy, supplemented by E.S.R., X-ray and visible spectral measurements are used in the investigation of iron in a glaze composition similar to that used in Chapter Four. The Mossbauer
    results are used in following the influence of; M in MO
    (M= Sr, Ca and Ba), oxides of titanium(IV) and vanadium(V ),
    and firing conditions on the chemistry of iron. Generally
    the iron(II) and iron(III) in the fired glazes are in octahedral sites although there are a range of similar, though not identical environments. A quite noticable
    influence of M (in MO) on the resonance line width is seen.
    In one case evidence is found for iron(IV) in an iron/vanadium glaze. E.S.R. of vanadium containing glazes indicate that vanadium is present as V02+ in a highly distorted tetragonal environment .
    Date of AwardMar 1983
    LanguageEnglish
    SupervisorW.R. McWhinnie (Supervisor)

    Keywords

    • mossbauer
    • nickel
    • vanadium
    • iron
    • esr

    Cite this

    The chemistry of ceramic glazes
    Ali, N. J. (Author). Mar 1983

    Student thesis: Doctoral ThesisDoctor of Philosophy