CN108706971A - 一种具有大压电应变记忆特性的无铅铁电陶瓷材料及其制备方法 - Google Patents

一种具有大压电应变记忆特性的无铅铁电陶瓷材料及其制备方法 Download PDF

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CN108706971A
CN108706971A CN201810670093.7A CN201810670093A CN108706971A CN 108706971 A CN108706971 A CN 108706971A CN 201810670093 A CN201810670093 A CN 201810670093A CN 108706971 A CN108706971 A CN 108706971A
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piezoelectric strain
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周昌荣
曾卫东
许积文
黎清宁
杨玲
袁昌来
陈国华
饶光辉
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Guilin University of Electronic Technology
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Abstract

本发明公开了一种具有大压电应变记忆特性的无铅铁电陶瓷材料及其制备方法,该陶瓷材料组成为:Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2。用微波快速烧结结合快速水冷制得,产品经实验测量,具有非常优异的压电应变记忆特性,最大压电应变记忆效应ΔS=0.46%,工艺简单,成本低廉,适合大规模工业生产。

Description

一种具有大压电应变记忆特性的无铅铁电陶瓷材料及其制备 方法
技术领域
本发明涉及应变驱动用的无铅铁电陶瓷材料,具体是一种ABO3型钙钛矿结构,具有大压电应变记忆特性的钛酸铋钠(BNT)基无铅铁电陶瓷材料及其制备方法。
背景技术
铁电材料具有压电性、介电性、热释电性、光电效应、声光效应、光折变效应以及非线性光学效应等众多性能,可用于制备换能器、微位移器、传感器、谐振器及滤波器等一系列电子元件。是一种不可或缺的高技术新材料之一。由于铅的污染问题,许多国家与地区通过法律、法规、政府指令等形式对含铅电子产品加以禁止,高性能无铅铁电材料的研究是当前非常迫切解决的问题。
铁电陶瓷在电场作用下产生压电应变,可以用来作为驱动器,微位移测量仪。但是,这种应变在电场撤消后消失,不能持续产生驱动。在一些特殊的应用场合,需要再施加一次电场后,能产生永久的驱动力,这种器件的应用需要大的压电应变记忆效应。钛酸铋钠(BNT)基无铅陶瓷具有较强的铁电性,非常具有开发潜力,是获得广泛关注的材料之一。目前钛酸铋钠(BNT)基的压电应变记忆效应还很少报道。
发明内容
本发明的目的是提供一种ABO3型钙钛矿结构,具有大压电应变记忆效应的钛酸铋钠(BNT)基无铅铁电陶瓷材料及其制备方法,该陶瓷材料性能优异,最大压电应变记忆效应ΔS=0.46%,工艺简单,成本低廉,适合大规模工业生产。
本发明具有大压电应变记忆效应的无铅铁电陶瓷材料,组成为:
Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2
上述具有大压电应变记忆效应的无铅铁电陶瓷材料的制备方法,采用微波陶瓷烧结法,结合水冷快速冷却速度,具体包括如下步骤:
(1)按照Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2的化学计量分别称取分
析纯原料Bi2O3、Li2CO3、V2O5、Na2CO3、MnO2和TiO2,装入球磨罐中,以氧化锆为磨球、无水乙醇为球磨介质,充分混合球磨24小时,分离磨球,将原料在60℃烘干;
(2)烘干后的粉料压制成大块坯体,放入高铝坩埚加盖,于820℃保温2小时合
成固溶体;
(3)将合成的固溶体在100Mpa冷等静压成型;
(4)成型的原料采用微波烧结,30℃/min快速升温至1080℃保温80分钟,烧结成瓷,然后取出样品快速水冷至室温;
(5)烧结后的样品加工成两面光滑、厚度约0.5mm的薄片,两面镀银电极制备成具有大压电应变记忆特性的无铅铁电陶瓷材料。
所得产品经实验测量,具有优良的压电应变记忆效应,最大压电应变记忆效应ΔS=0.46%,绿色环保,工艺简单,成本低,适合工业生产。
附图说明
图1为本发明无铅铁电陶瓷应变曲线及压电应变记忆效应图。
具体实施方式
下面结合实施例和附图对本发明内容作进一步的说明,但不是对本发明的限定。
实施例
一种具有大压电应变记忆效应的无铅铁电陶瓷材料,组成为:
Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2
制备上述具有大压电应变记忆特性的无铅铁电陶瓷材料,步骤如下:
(1)按照Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2的化学计量分别称取分
析纯原料Bi2O3、Li2CO3、V2O5、Na2CO3、MnO2和TiO2,装入球磨罐中,以氧化锆为磨球、无水乙醇为球磨介质,充分混合球磨24小时,分离磨球,将原料在60℃烘干;
(2)烘干后的粉料压制成大块坯体,放入高铝坩埚加盖,于820℃保温2小时合
成固溶体;
(3)将合成的固溶体在100Mpa冷等静压成型;
(4)成型的原料采用微波烧结,30℃/min快速升温至1080℃保温80分钟烧结成瓷,然后取出样品快速水冷至室温;
(5)烧结后的样品加工成两面光滑、厚度约0.5mm的薄片,两面镀银电极制备成具有大压电应变记忆特性的无铅铁电陶瓷材料。
参照图1,所得产品经实验测量,具有优良的压电应变记忆效应,最大压电应变记忆效应ΔS=0.46%,绿色环保,工艺简单,成本低,适合工业生产。
通过上面给出的实施例,可以进一步清楚的了解本发明的内容,但它们不是对本发明的限定。

Claims (2)

1.一种具有大压电应变记忆特性的无铅铁电陶瓷材料,其特征在于:该陶瓷材料组成为:Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2
2.根据权利要求1所述的具有大压电应变记忆特性的无铅铁电陶瓷材料,其特征在于,包括如下步骤:
(1)按照Bi0.53Na0.5TiO3+0.05wt%LiVO3+0.1wt%MnO2的化学计量分别称取分
析纯原料Bi2O3、Li2CO3、V2O5、Na2CO3、MnO2和TiO2,装入球磨罐中,以氧化锆为磨球、无水乙醇为球磨介质,充分混合球磨24小时,分离磨球,将原料在60℃烘干;
(2)烘干后的粉料压制成大块坯体,放入高铝坩埚中加盖,于820℃保温2小时合成固溶体;
(3)将合成的固溶体在100Mpa冷等静压成型;
(4)成型的原料采用微波烧结,以30℃/min快速升温至1080℃保温80分钟,烧结成瓷,然后取出样品快速水冷至室温;
(5)烧结后的样品加工成两面光滑的薄片,两面镀银电极制备成具有大压电应变记忆特性的无铅铁电陶瓷材料。
CN201810670093.7A 2018-06-26 2018-06-26 一种具有大压电应变记忆特性的无铅铁电陶瓷材料及其制备方法 Expired - Fee Related CN108706971B (zh)

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