Microstructure properties
The crackers were cut and mounted on aluminum stubs using
double adhesive tape. The samples were sputter-coated with
gold–palladium to render thermoelectrically conductive by
using (Edwards S150A Sputter Coating Device) and then
scanned using JXA-840A scanning electron microscope
(JEOL, Tokyo-Japan). The micrographs were taken at magnification
of 50· for the surface and cross section parts of the
crackers.