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Metal catalysed intumescence: characterisation of the thermal decomposition of calcium gluconate monohydrate

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Abstract

Calcium gluconate monohydrate is a member of a new class of base-catalysed intumescent compounds. It forms low-density closed-cell carbonaceous foam when exposed to heat. The volume expansion can be as high as two hundred times the original volume. At temperatures above 750°C this foam is transformed into a porous, yet cohesive, structure based on calcium oxide. The latter has only a slightly higher density and shows significant flame-resistance.

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Authors and Affiliations

  1. Institute of Applied Materials, Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Pretoria, 0002, South Africa

    F. J. W. J. Labuschagné & W. W. Focke

Authors
  1. F. J. W. J. Labuschagné
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  2. W. W. Focke
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Correspondence to W. W. Focke.

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Labuschagné, F.J.W.J., Focke, W.W. Metal catalysed intumescence: characterisation of the thermal decomposition of calcium gluconate monohydrate. Journal of Materials Science 38, 1249–1254 (2003). https://doi.org/10.1023/A:1022818022650

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  • DOI: https://doi.org/10.1023/A:1022818022650

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