Ceramic tiles with controlled porosity and low thermal conductivity by using pore-forming agents
authors Novais, RM; Seabra, MP; Labrincha, JA
nationality International
journal CERAMICS INTERNATIONAL
author keywords A. Pressing; B. Porosity; C. Thermal conductivity; D. Traditional ceramics; E. Functional applications
keywords SILICON-CARBIDE CERAMICS; POROUS ALUMINA CERAMICS; PZT CERAMICS; STARCH; POLYPROPYLENE; MICROSTRUCTURE; DECOMPOSITION; DEGRADATION; POLYETHYLENE; FABRICATION
abstract This work reports the influence of pore forming agents, their incorporation content and particle size distribution on the bi-layered ceramics porosity, mechanical resistance and thermal conductivity. The results demonstrate that the porosity level on the hi-layered ceramics bottom layer can be easily controlled by the porogen amount, while porogen particle size affects both the number and size distribution of the pores. Two different pore forming agents were evaluated, namely polypropylene (PP) and polymethyl methacrylate (PMMA). The nature of the pore forming agent, however, did not affect the hi-layered ceramics' properties. The incorporation of porosity into the hi-layered ceramics promotes thermal conductivity attenuation (up to 79%) in comparison with conventional porcelain stoneware ceramics, yet maintaining suitable mechanical strength. Thermal conductivity decrease is adjustable as a function of the volume and size of the generated pores, thus enabling materials to be tailored for the envisaged applications. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0272-8842
year published 2014
volume 40
issue 8
beginning page 11637
ending page 11648
digital object identifier (doi) 10.1016/j.ceramint.2014.03.163
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000340328600021
  ciceco authors
  impact metrics
journal impact factor (jcr 2016): 2.986
5 year journal impact factor (jcr 2016): 2.814
category normalized journal impact factor percentile (jcr 2016): 94.231
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg