中文摘要：

采用传统固相法制备了CeO2掺杂0.9Bi4Ti3O（12）-0.1K（0.5）Na（0.5）NbO3（BTO-KNN）铋层状陶瓷材料。系统研究了CeO2掺杂对BTO-KNN基陶瓷物相结构、微观结构以及电性能的影响。结果表明：所有陶瓷样品均为单一的铋层状结构：BTO-KNN基陶瓷的压电性能随着CeO2的掺杂而显著提高,损耗明显降低。当CeO2掺量为0.75%（质量分数）时,样品具有最佳的电性能：d（33）=28 pC/N,介电损耗tanδ=0.29%,机械品质因数Qm=2897,剩余极化强度Pr=11.83μC/cm~2,且居里温度Tc高达615℃;研究结果表明CeO2掺杂0.9Bi4Ti3O（12）-0.1K（0.5）Na（0.5）NbO3铋层状陶瓷是一种潜在的高温陶瓷材料。

英文摘要：

The cerium doped 0.9Bi4Ti3O（12）-0.1K（0.5）Na（0.5）NbO3（BTO-KNN） piezoelectric ceramics were synthesized using conventional solid state processing. The effects of CeO2 doping on the microstructure and the electrical properties of BTO-KNN ceramics were investigated. It is found that the ceramics possess a pure phase of bismuth oxide layer-type structure. The piezoelectric properties of BTO-KNN-based ceramics are significantly improved after cerium doping. The piezoelectric constant d33, dielectric loss tan δ, mechanical quality factor Qm and remanent polarization Pr for the BTO-KNN ceramics with 0.75 wt% CeO2 dopant are found to be 28 pC /N, 0.29%, 2897, 11.83 μC/cm~2, respectively, and with high Curie temperature TC（~615 °C） and stable piezoelectric properties, demonstrating that the cerium doped BTO-KNN piezoelectric ceramics are the promising candidates for high-temperature applications.