烧结温度对BiYbO_3–PbTiO_3–PbZrO_3三元系压电陶瓷结构和性能的影响  

Influences of Sintering Temperature on Structure and Properties of BiYbO_3–PbTiO_3–PbZrO_3 Ternary Piezoelectric Ceramics

作　　者：时亮[1] 张波萍[1] 赵笑昆[1] 朱立峰[1] 赵磊[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《硅酸盐学报》2013年第12期1656-1661,共6页Journal of The Chinese Ceramic Society

摘　　要：采用固相合成法制备0.55（0.1BiYbO3-0.9PbTiO3）-0.45PbZrO3＋0.2％La2O3（BY-PT-PZ-La0.2）压电陶瓷。研究了烧结温度对BY-PT-PZ-La0.2雎电陶瓷相结构、微观形貌及电学性能的影响。在1080～1220℃烧结温度范围内，样品的主相均为四方钙钛矿结构，c／a值由1.024提高到1.031。随烧结温度升高，Curie温度死保持在379～385℃范围，相对密度和介电常数呈先增大后减小趋势，在1130℃分别达到最大值97.58％和D1068。由于高致密度、较低的四方度c／a和较少的ZrO2杂相，在此温度烧结的陶瓷可获得最优电学性能：压电常数d33=276 pC／N，Tc=382℃，剩余极化强度P=14.15μC／cm^2，机电耦合系数kp=49.73％，介电损耗tan δ=0.023。The 0.55（0.1BiYbO3-0.9PbTiO3）-0.45PbZrO3＋0.2%La2O3（BY-PT-PZ-La0.2） piezoelectric ceramic was synthesized by a conventional solid-phase sintering. The influence of sintering temperature on the crystalline phase, microstructure and electrical prop- erties of the ceramics was investigated. All the ceramics sintered at 1 080-1 220℃ possess a perovskite host phase with the tetragonal symmetry. The relative density and dielectric constant εr increase initially and then decrease with raising sintering temperature. The optimum values of the relative density and dielectric constant er at 1 130℃ are 97.58% and 1 068, respectively, in an increased c/a ratio range from 1.024 to 1.031 and in a Tc range from 379 to 385℃. The optimized piezoelectric properties, i.e., d33 = 276pC/N, Tc = 382℃,/cp = 49.73%, Pr = 14.15 μC/cm^2, tan 8 = 0.023 were also obtained at 1 130℃ due to the combined effect of the higher density, the lower c/a ratio as well as a small amount of ZrO2 impurity.

关 键 词：压电陶瓷 钛酸铅 锆酸铅 电学性能 固相烧结 

分 类 号：TQ174.75[化学工程—陶瓷工业]