Densification of alumina at 1250 °C with MnO2 and TiO2 additives

1995 
Abstract The effects of MnO 2 and TiO 2 additions in 3 wt% MnO 2 + (0.5, 1.5, 3.0) wt% TiO 2 additive combinations on the sintering of α-Al 2 O 3 have been investigated. The microstructural development along with the microhardness has been characterized. The Al 2 O 3 + 3 wt% MnO 2 + 0.5 wt% TiO 2 system resulted in high densification (98% of the theoretical density) giving a uniform grained microstructure and yielding a hardness value of 23.14 GPa at a sintering temperature as low as 1250 °C.
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