| Development of Cordierite Based Reticulated Foams
with Improved Mechanical Properties for
Porous Burner Applications |
P. Biswas,1,* K. Varaprasad,2 P. Ramavath,1 M. Buchi Suresh,1 A. K. Khanra2 and R. Johnson1
Pages : 56-61
DOI : 10.1080/0371750X.2017.1232178 |
| Abstract |
| Cordierite is a ternary oxide of silica, magnesia and alumina and one of the
interesting ceramic materials and a potential material for various thermostructural
applications. The present study is to explore the possibility of
enhancing the mechanical properties of cordierite using zirconia as an additive
in the range of 0-10 wt% followed by comparative evaluation of properties.
Cordierite precursor mix was subjected to calcination to ensure the partial
formation of cordierite. A part of calcined cordierite and another two parts
were blended with 5 and 10 wt% of zirconia and were planetary ball milled to
ensure homogeneity in compositions. The formulations were compacted after
granulation. The green compacts were subjected to TG-DSC and XRD
investigations were carried out on sintered samples. Mechanical properties
such as flexural strength at room and elevated temperatures and thermal
expansion behaviour were analyzed for all the samples. Zirconia addition was
found to enhance the mechanical properties; however, at higher concentration
(10 wt%) segregation of zirconium silicate resulted in the reduction in flexural
strength. Reticulated foams of cordierite and cordierite+5 wt% zirconia were
fabricated by polymeric sponge replication process and evaluated for their
properties. Further, initial trials as a porous combustion media demonstrated
the feasibility for burner applications. |
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