中文摘要：

采用传统的固相烧结法,制备了Bi_（3-x）Er_xTi_（0.98）Ta_（0.02）Nb_（0.98）W_（0.02）O_9（x=0,0.02,0.06,0.1,0.14,0.24）铋层状结构陶瓷.经X射线衍射（XRD）表征,新合成材料为单相结构.Er~（3＋）掺杂后,陶瓷样品在室温下显示出了很强的上转换发光,且随着Er~（3＋）掺杂含量的增多,由明亮的绿色变为黄色发光.室温时,在可见光波长范围内,有3个峰,分别为534 nm和549 nm处的绿光峰和670 nm处的红光峰,对应于Er~（3＋）离子的~2H_（11/2）→~4I_（15/2）,~4S_（3/2）→~4I_（15/2）和~4F_（9/2）→~4I_（15/2）跃迁.变功率条件下的发光强度.研究表明：绿光和红光发射均为双光子过程.研究结果表明：Bi_（3-x）Er_xTi_（0.98）Ta_（0.02）Nb_（0.98）W_（0.02）O_9是一种具有优异光学性能的新型多功能材料.

英文摘要：

Bismuth layered-structure oxides in the Bi_（3-x）ErxTi_（0. 98）Ta_（0. 02）Nb_（0. 98）W_（0. 02）O_9 system were synthesized by the conventional solid state reaction approach. The XRD analysis showed that all the ceramics were the single phase with bismuth layered-structure structure. A bright up-conversional photoluminescence（ UC） can be measured by partially substituting Er~（3＋）for Bi~（3 ＋）. Under 980 nm radiation excitation,three emission bands located at green（ 534 nm,549 nm） and red（ 670 nm） wavelength regions were obtained at room temperature. They can be assigned to ~2H_（11 /2）→~4I_（15 /2）,~4S_（3 /2）→~4I_（15 /2） and ~4F_（9 /2）→~4I_（15 /2）. The dependence of the emission intensity on the pumping power indicated that the up-conversion emission was a two-photon process. These Er~（3＋）doped Bi_3Ti_（0. 98）Ta_（0. 02）Nb_（0. 98）W_（0. 02）O_9 based ferroelectrics could possibly be used as a multifunctional material for a wide range of applications.