The purpose of this paper is to investigate the grain orientation and prope
rties of SrBi2Ta2O9 (SBT) ceramics with excess Bi2O3. Ordinarily fired (OF)
ceramics were prepared by conventional ceramic techniques at 900-1300 degr
ees C for 2 h. The grain-oriented (GO) ceramics were prepared using the hot
-forging method. With addition of Bi2O3 in the amount of 0 - 1.5 wt% to the
SET of stoichiometric composition, the optimum firing temperature in OF ce
ramic samples gradually lowered with increasing Bi2O3 addition, and was abo
ut 1100 degrees C in the case of 0.5 wt% of excess Bi2O3 Plastic deformatio
n is easily accomplished using the hot forging method where Bi2O3 exists as
a state of liquid phase within the sample. In fact, the GO sample with 0.5
wt% of excess Bi2O3 showed a highly structured orientation f = 0.97 in the
case of hot-forging at 1100 degrees C.