Premium
Effect of ZrO 2 on the densification behavior and properties of Indian magnesite
Author(s) -
Ghosh Chandrima,
Sinhamahapatra Somnath,
Tripathi Himansu Sekhar
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13095
Subject(s) - magnesite , materials science , cubic zirconia , microstructure , phase (matter) , thermogravimetric analysis , differential thermal analysis , impurity , metallurgy , melting temperature , mineralogy , magnesium , composite material , chemical engineering , ceramic , geology , chemistry , physics , organic chemistry , optics , diffraction , engineering
Natural magnesite is the primary source for magnesia‐based refractory materials. India has vast deposits of magnesite in Salem and Almora regions. However, due to the presence of large amount of impurities which forms low‐melting compounds at elevated temperature, its high‐temperature application is restricted. Raw magnesite was evaluated in terms of chemical analysis, differential thermal analysis, thermogravimetric analysis, and phase assemblage. Zirconia (1‐5 wt %) was added to Indian natural magnesite of Salem region to minimize the low‐melting phase formation at high temperatures. Samples were sintered in the temperature range of 1550‐1700°C. Sintered samples were characterized in terms of densification, mechanical and thermo‐mechanical properties, phase assemblage, and microstructure. It was found that the addition of zirconia reduced the formation of detrimental phases like monticellite and thereby improved the high‐temperature mechanical properties.