Studies on synthesis and properties of magnesia refractory aggregates prepared from Indian magnesite through plasma fusion

• DOI: 10.1016/j.ceramint.2014.10.112
• Publication Date: 2014-10-27T14:57:31Z
• Authors: Ananya Saha; S.K. Singh; A. Ghosh; J. Ghosh; M.K. Haldar
• Keywords: 0103 physical sciences; 02 engineering and technology; 0210 nano-technology; 01 natural sciences

The Indian magnesite has been fused in a plasma reactor for development of synthetic magnesia refractory aggregates. A Novel and low cost indigenously developed plasma reactor has been used to prepare the magnesia aggregates within a few minutes instead of using a long heating schedule of conventional sintering process. Different compositions of magnesia have been prepared by varying zirconia content in the mixture. With addition of zirconia the B.D. of 3.56 g/cm3 have been achieved with densification of 96.22%. These fused samples have Hv (hardness) of 9.92 GPa and Kic (fracture toughness) of 5.51 MPa m1/2 with incorporation of zirconia. The microstructure consists of periclase grains surrounded by zirconia having dendritic structure.