Journal of Student Research 2014

Barium Titanate & Barium Titanate/Aluminum Oxide Ceramics...

complete grain fusion, diminished intergranular porosity, and large localized pores.

The optical photomicrographs of Fig. 3 provide additional evidence for the effect of sintering temperature/time on porosity in sintered coupons; higher sintering temperatures reduce the total porosity content and increase the average pore size. Although chemical composition and phase analysis were not attempted, prior work [7] has shown that BaTiO 3 /Al 2 O 3 composites consist mostly of BaTiO 3 with small amounts of secondary phases such as BaAl 2 O 4 and Ba 4 Ti 10 Al 2 O 27 .

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