中文摘要：

用固相烧结工艺制备了不同取向率（I）的Bi4Ti3O12（BTO）多晶陶瓷样品。在相同的烧结温度（1140℃），BTO样品的脑烧结时间（2～20h）的增加出现了先升高后降低的变化趋势，最大值达89．9％。样品的铁电和压电性能均与样品的J有关，在a/（b）择优取向的BTO样品的铁电和压电性能都随样品I的升高而改善，其2倍剩余极化强度（Pt）和压电系数（d33）分别达到53．4μC／cm^2和22．2pC／N：c取向样品的2Pr和d33则随着取向率的升高而降低。

英文摘要：

Several polycrystalline bismuth titanate Bi4Ti3O12（BTO） ceramic samples with different degrees of grain orientation （I） were prepared using the solid state reaction. Under the identical temperature, when the sintering time （2-20 h） increases, the I ingreases initially and reaches its maximum value of 89.9% then decreases. The ferro-and piezoelectric properties are dependent on the L The two times of remanent polarization intensity （Pr） and piezoelectric coefficient （d33） of a/（b）-orientation predominant BTO sampies increases with the increase of/and the maximum values are 53.4 μC/cm^2 and 22.2 pC/N, respectively, while the 2Pr and d33 decreases with the increase of/in c-orientation predominant ones.