CN106747422A - 高储能密度及高电致应变多功能无铅陶瓷及制备方法 - Google Patents

高储能密度及高电致应变多功能无铅陶瓷及制备方法 Download PDF

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CN106747422A
CN106747422A CN201611201063.9A CN201611201063A CN106747422A CN 106747422 A CN106747422 A CN 106747422A CN 201611201063 A CN201611201063 A CN 201611201063A CN 106747422 A CN106747422 A CN 106747422A
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许积文
赵阳阳
周昌荣
王�华
袁昌来
饶光辉
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Guilin University of Electronic Technology
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Abstract

本发明公开了一种高储能密度及高电致应变的多功能无铅陶瓷及其制备方法，所述多功能无铅陶瓷组份用化学通式(Bi0.5Na0.5)1‑xBaxTi1‑y(Mg1/3Nb2/3)yO3或Bi0.5(Na1‑uKu)0.5Ti1‑v(Mg1/ 3Nb2/3)vO3所表示，其中：x、y、u、v表示摩尔分数；0.06≤x≤0.09；0.015≤y≤0.04；0.16≤u≤0.2；0.02≤v≤0.045。这种多功能无铅陶瓷的晶粒细小均匀，致密度高，在室温下电致应变大，储能密度高，介电常数大。该材料不仅克服了铅基材料的环境污染问题，而且在一种材料中实现了多功能化。

Description

高储能密度及高电致应变多功能无铅陶瓷及制备方法
技术领域
本发明属于电子陶瓷材料领域，具体涉及一种高储能密度及高电致应变的多功能无铅陶瓷及其制备方法。
背景技术
功能陶瓷是一种利用材料的电、热、磁、声、光等直接效应和耦合效应所提供的一种或多种性质来实现某种使用功能的先进陶瓷，很多功能陶瓷在电子工业中已经获得了广泛的应用，例如电容器、热敏电阻、压敏电阻、驱动器等。铅基功能陶瓷由于其具有较好的储能性能、大的应变量等，被广泛应用于制动器、电容器以及精密电子元件，但是铅基陶瓷含有大量的有害元素铅，对人体健康不利并且污染环境及废弃后不容易处理。
目前无铅功能陶瓷的研究和开发主要集中于如何提高它们的铁电、介电、储能等单功能性能，以及每种电性能的结构来源，随着功能材料和器件的不断发展，期待在一种材料或器件中可以实现越来越多的功能，成为智能材料和器件。可以较好的解决通过复合多种功能的材料来实现多功能的技术问题。
发明内容
基于上述背景，本发明提供一种具备高储能密度和高电致应变的多功能无铅陶瓷及其制备方法。这种多功能无铅陶瓷的晶粒细小、均匀，致密度高，在室温下电致应变大，储能密度高，介电常数大，克服了铅基材料的环境污染问题，在同一种材料中实现了多功能化。
本发明中所述多功能无铅陶瓷组份的化学通式可以用(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3或Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3所表示。其中：x、y、u、v表示摩尔分数；0.06≤x≤0.09；0.015≤y≤0.04；0.16≤u≤0.2；0.02≤v≤0.045。
本发明中所述多功能无铅陶瓷的制备方法，除了现有工艺步骤外，至少还包括如下步骤：将粉体原料按照化学通式(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3或Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3进行配料。其它后续步骤如加入分散剂球磨、球磨浆料干燥、过筛、煅烧、保温合成粉体等皆可以采用现有工艺。
具体实施方式
为了详细介绍本发明，在此给出一些具体的实施例，并提供了一些优选的工艺参数。
实施例1：成分为(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3，其中x＝0.06，y＝0.04。
主要制备步骤：
(1)以分析纯Bi2O3、Na2CO3、BaCO3、MgO、Nb2O5和TiO2粉体为原料，按照化学式(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3进行配料，以无水乙醇为介质滚动球磨12小时，80℃干燥后在氧化铝坩埚中以860℃预烧保温2小时合成粉体。
(2)预烧获得的粉体加入7％(重量百分比)浓度的聚丙烯醇PVA溶液作为粘接剂对粉体进行造粒，造粒粉体在40MPa压力下压制成圆片状素坯。
(3)将圆片素坯在高温炉中烧结，气氛为空气，120℃/h的速率升温至600℃保温2小时，同样以120℃/h的速率升温至1150℃保温2小时，随炉自然降温至室温。
将烧结后的陶瓷片机加工成两面光滑、厚度约为0.5mm的薄片，薄片双面印刷银浆，烧制获得银电极，测量陶瓷的储能、应变、介电性能，性能如表1所示。
实施例2：成分为(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3，其中x＝0.06，y＝0.035。
制备方法同实施例1，性能如表1所示。
实施例3：成分为(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3，其中x＝0.09，y＝0.015。
制备方法同实施例1，性能如表1所示。
实施例4：成分为Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3，其中u＝0.16，v＝0.02。
以分析纯Bi2O3、Na2CO3、K2CO3、MgO、Nb2O5和TiO2粉体为原料，预烧温度为880℃，烧结温度为1130℃；其它制备步骤同实施例1，性能如表1所示。
实施例5：成分为Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3，其中u＝0.18，v＝0.04。
制备方法同实施例4，性能如表1所示。
实施例6：成分为Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3，其中u＝0.20，v＝0.045。
制备方法同实施例4，性能如表1所示。
表1：
实施例样品在室温下的电学性能

Claims (7)

1.一种高储能密度及高电致应变多功能无铅陶瓷，其特征在于所述多功能无铅陶瓷的组成用化学通式(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3或Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/3Nb2/3)vO3所表示；其中：x、y、u、v表示摩尔分数；0.06≤x≤0.09；0.015≤y≤0.04；0.16≤u≤0.2；0.02≤v≤0.045。
2.一种高储能密度及高电致应变多功能无铅陶瓷的制备方法，至少包括如下步骤：将粉体原料按照化学式(Bi0.5Na0.5)1-xBaxTi1-y(Mg1/3Nb2/3)yO3或Bi0.5(Na1-uKu)0.5Ti1-v(Mg1/ 3Nb2/3)vO3进行配料，加入分散剂后球磨，球磨浆料干燥后过筛，然后加以煅烧、保温合成粉体；其中：x、y、u、v表示摩尔分数；0.06≤x≤0.09；0.015≤y≤0.04；0.16≤u≤0.2；0.02≤v≤0.045。
3.根据权利要求2所述的方法，还包括将煅烧合成的粉体加入临时粘接剂进行造粒、造粒粉体过筛后压制成片状生坯的步骤。
4.根据权利要求3所述的方法，还包括如下步骤：将片状生坯排胶，排胶后的生坯进行高温烧结。
5.根据权利要求2所述的方法，其中所述分散剂为无水乙醇；所述煅烧、保温的过程为在坩埚中以800-900℃煅烧、保温2-6小时。
6.根据权利要求3所述的方法，其中所述临时粘接剂为5wt％-7wt％浓度的聚乙烯醇溶液。
7.根据权利要求4所述的方法，其中所述高温烧结步骤是以120℃/h的速率升温至600℃保温2小时，同样以120℃/h的速率升温至1130℃-1150℃保温2小时，其后随炉自然降温至室温。
CN201611201063.9A 2016-12-22 2016-12-22 高储能密度及高电致应变多功能无铅陶瓷及制备方法 Pending CN106747422A (zh)

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CN104671778A (zh) * 2015-03-10 2015-06-03 桂林电子科技大学 一种高场大应变及高储能密度无铅陶瓷及其制备方法

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CN104671778A (zh) * 2015-03-10 2015-06-03 桂林电子科技大学 一种高场大应变及高储能密度无铅陶瓷及其制备方法

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CHENGGANG XU 等: "Structure, electrical properties and depolarization temperature of (Bi0.5Na0.5)TiO3-BaTiO3 lead-free piezoelectric ceramics", 《SOLID STATE SCIENCES》 *
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Application publication date: 20170531