Crystallization kinetics and phase relations of wollastonite by real time synchrotron powder diffraction

A F Gualtieri, E Mazzucato, C C Tang, R J Cernik

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The crystn. kinetics of 1T-wollastonite in the CaO-SiO2 system starting from a stoichiometric glass was investigated in situ by x-ray synchrotron powder diffraction at 800-900°. At higher temp., 1T-wollastonite converts into the 2M polytype. The collected data were analyzed by the Avrami models and kinetic parameters seem to indicate a nucleation deceleratory controlled mechanism with 1D growth. The preliminary results of this study are part of a general project aimed to investigate polymorphism and polytypism of wollastonite and the related phases, esp. the role of the kinetic parameters in the formation of the polytypes in the pyroxenoid series. [on SciFinder(R)]
    Original languageEnglish
    Pages (from-to)224-229
    Number of pages6
    JournalMater. Sci. Forum
    Volume321-324
    Issue numberPt. 1, EPDIC 6, Proceedings of the Sixth European Powder Diffrac
    DOIs
    Publication statusPublished - 2000

    Keywords

    • Crystallization kinetics
    • Polytypism (crystn. kinetics and polytypism of wollastonite studied by real time synchrotron powder diffraction)
    • calcium silicate crystn kinetics polytypism

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