Highly conductive coatings of carbon black/silica composites obtained by a sol-gel process

Enríquez Pérez, Esther and Fernández Lozano, José Francisco and Rubia López, Miguel Ángel de la (2012). Highly conductive coatings of carbon black/silica composites obtained by a sol-gel process. "Carbon", v. 50 (n. 12); pp. 4409-4417. ISSN 0008-6223. https://doi.org/10.1016/j.carbon.2012.05.019.

Description

Title: Highly conductive coatings of carbon black/silica composites obtained by a sol-gel process
Author/s:
  • Enríquez Pérez, Esther
  • Fernández Lozano, José Francisco
  • Rubia López, Miguel Ángel de la
Item Type: Article
Título de Revista/Publicación: Carbon
Date: 2012
ISSN: 0008-6223
Volume: 50
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Conductive submicronic coatings of carbon black (CB)/silica composites have been prepared by a sol-gel process and deposited by spray-coating on glazed porcelain tiles. Stable CB dispersions with surfactant were rheologically characterized to determine the optimum CB-surfactant ratio. The composites were analyzed by Differential Thermal and Thermogravimetric Analysis and Hg-Porosimetry. Thin coatings were thermally treated in the temperature range of 300-500degC in air atmosphere. The microstructure of the coatings was determined by scanning electron microscopy and the structure evaluated by confocal Raman spectroscopy. The electrical characterization of the samples was carried out using dc intensity-voltage curves. The coatings exhibit good adhesion, high density and homogeneous distribution of the conductive filler (CB) in the insulate matrix (silica) that protects against the thermal degradation of the CB nanoparticles during the sintering process. As consequence, the composite coatings show the lowest resistivity values for CB-based films reported in the literature, with values of ~7times10 -5Omegam.

More information

Item ID: 19020
DC Identifier: http://oa.upm.es/19020/
OAI Identifier: oai:oa.upm.es:19020
DOI: 10.1016/j.carbon.2012.05.019
Official URL: http://www.sciencedirect.com/science/article/pii/S0008622312004472
Deposited by: Memoria Investigacion
Deposited on: 07 Sep 2013 08:20
Last Modified: 01 Nov 2014 23:56
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