Publication Date:
2016-03-07
Description:
Publication date: Available online 5 March 2016 Source: Journal of Asian Ceramic Societies Author(s): Shuvendu Tripathy, Deepash Shekhar Saini, Debasis Bhattacharya The MgAl 2 O 4 nanocrystalline powder was synthesized using naturally available egg white and inexpensive metal nitrate salts. During this process, the freshly extracted egg white was mixed with metal nitrate salt and subsequently heated at 350 °C in a pit furnace. The entire dehydration of the aqueous solution thus facilitates the low-density fluffy mass. From TG–DTG results, it was observed that maximum decomposition of the precursors occurred below 600 °C. Therefore, the calcination temperature of as-synthesized powder was set at 600 °C. The MgAl 2 O 4 bulk ceramic foam was fabricated by dispersing different loading of MgAl 2 O 4 nanoparticles in the egg white, and then coating on polyurethane sponge prior to drying and sintering at a higher temperature. The ceramic suspensions exhibit a typical shear thinning behavior, and its viscosity was found to be significantly influenced by MgAl 2 O 4 powder content. An optimum loading of 40 wt% MgAl 2 O 4 nanoparticles in the egg white was found to show maximum porosity up to 90%. The obtained ceramic foam has potential applications in catalysis, absorption and sensor.
Electronic ISSN:
2187-0764
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
