Na0.5Bi8.5Ti7-xMnxO27铋层状陶瓷的结构与电性能研究
Research on Structure and Properties of Na0.5Bi8.5Ti7-xMnxO27 Bismuth Layered Ceramics
涂娜 1陈超 1陈云婧 1江向平1
作者信息
- 1. 景德镇陶瓷大学材料科学与工程学院,景德镇 333403
- 折叠
摘要
采用固相法制备了 Na0.5Bi8.5Ti7-xMnxO27(0≤x≤0.1)共生结构的铋层状陶瓷材料,通过Mn离子调控Na0.5Bi8.5Ti7-xMnxO27体系中的氧空位迁移和氧空位浓度的变化,研究了氧空位迁移和氧空位浓度对Na05Bi8.5Ti7-xMnxO27陶瓷材料的电性能的影响.研究发现所有样品均为单一的共生铋层状结构,无杂相生成.在掺入Mn的陶瓷样品中,Mn离子占据钙钛矿结构中的Ti离子的位置;在x ≤ 0.06时,氧空位迁移速率降低,氧空位迁移对陶瓷的电学性能影响占主导优势,介电损耗和漏电流减小,压电常数不断增大.随着Mn含量逐渐增加,当x＞0.06时,氧空位的浓度对电学性能的影响占主要优势,氧空位浓度不断增大,介电损耗和漏电流增大,压电常数降低.在x=0.06时,压电常数d33为19.8 pC/N达到最大,此时介电损耗较低,综合电性能最优.
Abstract
Bismuth layered ceramic materials Na0.5Bi8.5Ti7-xMnxO27(0≤x≤0.1)with inter-growth structure were prepared by the solid-state method.The effects of oxygen vacancy migration and oxygen vacancy concentration on the electrical properties of Na0.5Bi8.5Ti7-xMnxO27 ceramic materials were studied by regulating the migration of oxygen vacancies and the concentration of oxygen vacancies in the Na0.5Bi8.5Ti7-xMnxO27 system through Mn ion doping.The study found that all samples possessed a single inter-growth bismuth layered structure without any phase impurities.In the ceramic samples doped with Mn,Mn ions occupy the position of Ti ions in the perovskite structure.When x ≤ 0.06,the oxygen vacancy migration rate decreases,and the influence of oxygen vacancy migration on the electrical properties of ceramics predominates.As a result,dielectric loss and leakage current decreased,while the piezoelectric constant continuously increased.With the gradual increase in Mn content,when x＞0.06,the influence of oxygen vacancy concentration on the electrical properties became the main advantage.Consequently,the oxygen vacancy concentration increased,leading to an increase in dielectric loss and leakage current and a decrease in the piezoelectric constant.The maximum piezoelectric constant d33 value of 19.8 pC/N was obtained at x=0.06.At this time,the dielectric loss is low and the comprehensive electrical properties are optimal.
关键词
Na0.5Bi8.5Ti7O27/氧空位浓度/氧空位迁移Key words
Na0.5Bi8.5Ti7O27/Oxygen vacancy concentration/Oxygen vacancy migration引用本文复制引用
基金项目
国家自然科学基金(52062018)
国家自然科学基金(52162003)
江西省杰出青年基金(20212ACB214007)
江西省重点研发计划"揭榜挂帅"项目(20223BBE51018)
江西省自然科学基金(20212BAB201019)
出版年
2024
NETL
NSTL
万方数据