Abstract:Influences of TiO 2 or Y 2 O 3 dopants on pressure-assisted sintering of polycrystalline Al 2 O 3 were investigated to control the microstructure of sintered Al 2 O 3 as well as to improve the homogeneity of transparent Al 2 O 3 samples. The transparent polycrystalline Al 2 O 3 samples with and without the dopants were fabricated by two-step pulsed electric current sintering (TS-PECS). By the grain boundary segregation by the dopants, both TiO 2 and Y 2 O 3 depressed the densification and grain growth processe… Show more
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