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Electrically conductive aluminosilicate/graphene nanocomposite

Authors
Journal
Journal of the European Ceramic Society
0955-2219
Publisher
Elsevier
Volume
34
Issue
12
Identifiers
DOI: 10.1016/j.jeurceramsoc.2014.03.021
Keywords
  • Aluminosilicate
  • Graphene
  • Polyaniline
  • Conductivity
  • Calcination

Abstract

Abstract Highly electrically conductive ceramic material based on aluminosilicate/graphene nanocomposite has been prepared by high pressure (400MPa) compaction of montmorillonite intercalated with polyaniline followed with the high temperature (1400°C) treatment in argon atmosphere. Tablets pressed from polyaniline/montmorillonite intercalate exhibits strong texture due to the disk-shaped montmorillonite particles and, consequently, the high anisotropy in conductivity. The high temperature induced phase transformation of montmorillonite into cristobalite and mullite preserved the aluminosilicate layered structure and created good conditions for formation of graphene sheets from polyaniline layers intercalated in montmorillonite. Therefore, the texture and anisotropy in conductivity remain preserved in resulting aluminosilicate/graphene tablets, while the in-plane conductivity in aluminosilicate/graphene tablets is 23,000× higher than the conductivity of uncalcined polyaniline/montmorillonite tablets. Simple fabrication method of aluminosilicate/graphene tablets is very promising for the manufacturing of the electrically conductive and tough ceramic material, which can be exposed to corrosive environment as well as to high temperatures.

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