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AuthorDhuban S.B.
AuthorRamesh S.
AuthorTan C.Y.
AuthorWong Y.H.
AuthorJohnson Alengaram U.
AuthorTeng W.D.
AuthorTarlochan F.
AuthorSutharsini U.
Available date2020-04-09T12:27:27Z
Publication Date2019
Publication NameCeramics International
ResourceScopus
ISSN2728842
URIhttp://dx.doi.org/10.1016/j.ceramint.2018.12.207
URIhttp://hdl.handle.net/10576/13985
AbstractThe effect of manganese (0.1, 0.5 and 1.0 wt%) on the sintering and mechanical properties of alumina was studied. Sintering was carried out by the conventional heating method in a box furnace and in a hybrid multimode microwave furnace. XRD analysis revealed the precipitation of a spinel second phase (MnAl 2 O 4 ) in manganese-doped samples as a result of manganese limited solubility in the corundum lattice. The addition of 0.1 wt% manganese was most beneficial in enhancing the densification of alumina (97.5% relative density when compared to 94.2% for the undoped sample), hindered grain growth, and improved the hardness of the ceramic when sintered at 1500 C. The study also revealed that microwave sintering was effective in suppressing grain growth of alumina. In addition, the hardness was dependent on the sintered bulk density and that grain coarsening ensued as the density of the sintered alumina exceeded 95% of theoretical.
SponsorThe authors gratefully acknowledge University of Malaya , Malaysia for the support rendered in carrying out this research.
Languageen
PublisherElsevier Ltd
SubjectAlumina
Conventional sintering
Manganese doping
Microwave sintering
Sintering additive
TitleSintering behaviour and properties of manganese-doped alumina
TypeArticle
Pagination7049-7054
Issue Number6
Volume Number45
dc.accessType Abstract Only


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