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Processing of Cellular Glass Ceramics

Authors

  • Carlos Renato Rambo,

    Corresponding author
    1. Group of Ceramic and Glass Materials—CERMAT, Department of Chemical Engineering–EQA and Department of Mechanical Engineering—EMC, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
      †Author to whom correspondence should be addressed. e-mail: rambo@enq.ufsc.br
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  • Eliandra De Sousa,

    1. Group of Ceramic and Glass Materials—CERMAT, Department of Chemical Engineering–EQA and Department of Mechanical Engineering—EMC, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
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  • Antônio Pedro Novaes De Oliveira,

    1. Group of Ceramic and Glass Materials—CERMAT, Department of Chemical Engineering–EQA and Department of Mechanical Engineering—EMC, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
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  • Dachamir Hotza,

    1. Group of Ceramic and Glass Materials—CERMAT, Department of Chemical Engineering–EQA and Department of Mechanical Engineering—EMC, Federal University of Santa Catarina, 88040-900 Florianópolis, SC, Brazil
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    • *Member, American Ceramic Society.

  • Peter Greil

    1. Department of Materials Science, Glass and Ceramics, University of Erlangen-Nuremberg, D-91058 Erlangen, Germany
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    • **Fellow, American Ceramic Society.


  • L. Pinckney—contributing editor

†Author to whom correspondence should be addressed. e-mail: rambo@enq.ufsc.br

Abstract

Commercial polyurethane foams with a monomodal pore size distribution were chosen to produce LZSA (Li2O–ZrO2–SiO2–Al2O3 system) glass–ceramic foams by the polymeric sponge method. A suspension containing LZSA glass–ceramic, bentonite, and sodium silicate was prepared in water and isopropanol to impregnate the polymeric foams by dip coating. The suspension was characterized by rheological measurements. The effect of the solvent on the microstructure and physical properties on the LZSA foams was evaluated. The cellular microstructure of the glass–ceramic foams was characterized by scanning electron microscopy (SEM) and micro-computer X-ray tomography (μ-CT). LZSA foams prepared with isopropanol suspension exhibited higher mechanical strength under compression than those prepared with water.

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