The thermal behavior of k-exchanged forms of natrolite

Atsushi Yamazaki, R. Otsuka, H. Nishido

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    A series of K-exchanged forms of natrolite are easily obtained by treatment with KCl solution at room temperature for 1-62 days. The maximum degree of exchange of K is 91.94%. The thermal behavior of the exchanged forms is studied by DTA-TG and high temperature X-ray powder diffraction. The DTA curve of the exchanged form of the 91.94% sample exhibits a single large endotherm at 150°C due to a one-step dehydration, showing the remarkable decrease in dehydration temperature compared with natrolite. The dehydrated phase of natrolite collapses at about 800°C, while destruction of the dehydrated K-form occurs above 1000°C. It is well recognized that the thermal stability of natrolite is increased by Na-K exchange.

    Original languageEnglish
    Pages (from-to)237-242
    Number of pages6
    JournalThermochimica Acta
    Volume109
    Issue number1
    DOIs
    Publication statusPublished - 1986 Dec 15

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    dehydration
    thermal analysis
    Dehydration
    Differential thermal analysis
    destruction
    thermal stability
    X ray powder diffraction
    Temperature
    temperature
    Thermodynamic stability
    room temperature
    curves
    diffraction
    x rays
    Hot Temperature
    natrolite

    ASJC Scopus subject areas

    • Chemistry (miscellaneous)
    • Physical and Theoretical Chemistry

    Cite this

    The thermal behavior of k-exchanged forms of natrolite. / Yamazaki, Atsushi; Otsuka, R.; Nishido, H.

    In: Thermochimica Acta, Vol. 109, No. 1, 15.12.1986, p. 237-242.

    Research output: Contribution to journalArticle

    Yamazaki, Atsushi ; Otsuka, R. ; Nishido, H. / The thermal behavior of k-exchanged forms of natrolite. In: Thermochimica Acta. 1986 ; Vol. 109, No. 1. pp. 237-242.
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