Thermal insulation of muscovite/glass ceramic foam for solid oxide fuel cell
Resource
Journal of Power Sources, 196(19), 8012-8018
Journal
Journal of Power Sources
Pages
8012-8018
Date Issued
2011
Date
2011
Author(s)
Abstract
A direct foaming method of dispersed suspensions containing muscovite particulates and a glass powder (47BaO-21B2O3-27SiO 2-5Al2O3, in mol%) is used to prepare porous ceramic structures. The sintered foams exhibit extremely low thermal conductivity and slight expansion during the thermal treatment at 1000 °C. Both the foam stability and its thermal conductivity are investigated by considering foaming agents, muscovite/glass ratios, solid contents, microwave drying, wetting behaviors, and foam consolidation. One of the muscovite/glass ceramic foam, thermally treated at 950 °C for 1 h, showed the lowest thermal conductivity of 0.18 W m-1 K-1 at 800 °C among all of the prepared samples. Its gas permeability and compressive strength are 0.1 × 10-7 cm2 and 440 kPa, respectively. © 2011 Elsevier B.V.
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Type
journal article
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