Ceramics-Silikáty 51, (1) 9 - 14 (2007) |
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PREPARATION AND CHARACTERIZATION OF ANALCIME POWDERS BY X-RAY AND SEM ANALYSES
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Kohoutková Martina 1, Kloužková Alexandra 2, Maixner Jaroslav 3,
Mrázová Martina 1
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1 Laboratory of Inorganic Materials, Joint Workplace of the Institute of Chemical Technology Prague
and the Institute of Inorganic Chemistry AS CR, Technická 5, 166 28 Prague, Czech Republic
2 Department of glass and ceramics, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
3 Central laboratories, Institute of Chemical Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
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Keywords: Analcime, Hydrothermal synthesis, X-ray diffraction
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Analcime (NaAlSi₂O₆ ·H₂O) powders having controlled particle size distribution were designed [1, 2] as a potential precursor
for the fabrication of leucite (KAlSi₂O₆) dental ceramics retaining high fracture toughness and the thermal expansion coefficient
adjusted those of metals. The purpose of this study is to investigate the synthesis of analcime and the effect of principal
factors influencing its crystallisation. Analcime powders were prepared by hydrothermal synthesis in a Teflon-lined stainless
steel autoclave. The role of the composition of the reaction mixture (raw materials, OH⁻ concentration, and water content),
reaction temperature and time were studied. Prepared analcime was in form of homogenous powders with the uniform
particle size at intervals 1-5 µm depending on process parameters. |
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