烧结温度对BiYbO3–PbTiO3–PbZrO3三元系压电陶瓷结构和性能的影响_中国硅酸盐学会 - 精品期刊
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烧结温度对BiYbO3–PbTiO3–PbZrO3三元系压电陶瓷结构和性能的影响
2014-03-21 | 编辑:enablesite | 【
亮,张波萍,赵笑昆,朱立峰,赵
(北京科技大学材料科学与工程学院,北京 100083)
 
  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压电陶瓷相结构、微观形貌及电学性能的影响。在1 0801 220 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TC保持在379385 范围,相对密度和介电常数呈先增大后减小趋势,在1 130 分别达到最大值97.58%1 068。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/NTC = 382 ,剩余极化强度Pr = 14.15 μC/cm2,机电耦合系数kp = 49.73%,介电损耗tan δ = 0.023
 
关键词:压电陶瓷;钛酸铅锆酸铅;电学性能;固相烧结
中图分类号:TQ174.75    文献标志码:A    文章编号:0454–5648(2013)12–1656–06
网络出版时间:2013–11–29  13:42:00    网络出版地址:http://www.cnki.net/kcms/detail/11.2310.TQ.20131129.1341.201312.1656_010.html
 
Influences of Sintering Temperature on Structure and Properties of BiYbO3–PbTiO3–PbZrO3 Ternary Piezoelectric Ceramics
 
SHI LiangZHANG BopingZHAO XiaokunZHU LifengZHAO Lei
(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)
 
Abstract: 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 properties 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 εr 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 = 276 pC/N, TC = 382 ℃, kp = 49.73%, Pr = 14.15 μC/cm2, tan δ = 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.
 
Key words: piezoelectric ceramics; lead titanate; lead zirconate; electrical property; solid-phase sintering
 

 
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