摘要
BiFeO_(3)–BaTiO_(3)陶瓷的低温快速烧结致密化有助于抑制Bi元素的挥发,降低能耗以及快速筛选出具有优异电学性能的BiFeO_(3)–Ba TiO_(3)基陶瓷材料。在200 V/cm的直流电场和280 mA的限制电流作用下,通过反应闪烧Bi_(2)O_(3)、Fe_(2)O_(3)、TiO_(2)和BaCO_(3)混合粉体,能够在415℃的炉温下,30 s内获得具有良好铁电及压电性能的致密BiFeO_(3)–BaTiO_(3)陶瓷。反应闪烧过程中,固相化学反应和烧结致密化同时发生;限制电流值的大小对样品的相变和致密化程度有重要影响。反应闪烧技术可通过一步闪烧陶瓷材料的前驱体混合粉末而获得单相且致密的陶瓷材料,为陶瓷材料的快速制备提供了一个新的途径。
Rapid preparation of dense BiFeO_(3)–Ba TiO_(3)lead-free piezoelectric ceramics at low temperatures is beneficial to preventing the Bi volatilization,reducing the energy consumption and developing novel materials with some unique properties.In this paper,dense BiFeO_(3)–BaTiO_(3)ceramics with good ferroelectric and piezoelectric properties were prepared in an electric field of 200 V/cm with a current limit of 280 m A via reactive flash sintering of multiphase precursor powders (i.e.,Bi_(2)O_(3),Fe_(2)O_(3),TiO_(2)and BaCO_(3)) at 415℃for 30 s.The solid-state reaction in sintering occurs during the flash event.The current limit has an effect on the phase transformation and densification.It is indicated that the reactive flash sintering technology could prepare the single-phase and dense ceramic material through flash sintering of starting precursors in one step,thus providing an effective approach for the rapid production of ceramic materials.
作者
安盖
焦智华
付梦莹
苏兴华
AN Gai;JIAO Zhihua;FU Mengying;SU Xinghua(School of Materials Science and Engineering,Chang'an University,Xi'an 710061,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2022年第3期735-741,共7页
Journal of The Chinese Ceramic Society
基金
陕西省重点研发计划项目(2021GY-250)。
关键词
铁酸铋–钛酸钡
无铅压电陶瓷
反应闪烧
相变
致密化
bismuth ferrite-Barium titanate
lead-free piezoelectric ceramics
reactive flash sintering
phase transformation
densification