CN115536392A - 高温叠层压电驱动器用压电陶瓷片及其制备方法 - Google Patents

高温叠层压电驱动器用压电陶瓷片及其制备方法 Download PDF

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CN115536392A
CN115536392A CN202210989274.2A CN202210989274A CN115536392A CN 115536392 A CN115536392 A CN 115536392A CN 202210989274 A CN202210989274 A CN 202210989274A CN 115536392 A CN115536392 A CN 115536392A
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piezoelectric ceramic
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张静
李正权
燕周民
褚涛
江平
王兰花
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Guizhou Zhenhua Hongyun Electronics Co ltd
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Abstract

本发明公开了一种高温叠层压电驱动器用压电陶瓷片及其制备方法，属于压电陶瓷片及其制备方法；本发明提供的压电陶瓷材料的组成化学式为：Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt% Li2CO3+0.1wt% CuO+0.5wt% Bi2O3+0.5wt% Li2CO3；本发明提供的制备方法是按所述化学式配料将各原料混合，然后球磨、烘干、预烧、二次球磨、烘干、压制成型、烧结、印刷银浆料、烧银、极化。本发明提供的压电陶瓷片在具有优良压电性能的同时还降低了烧结温度，减少了PbO的挥发，且压电陶瓷片具有较大的变形位移和较好的稳定性，可满足高温叠层压电驱动器的使用要求。

Description

高温叠层压电驱动器用压电陶瓷片及其制备方法
技术领域
本发明涉及一种压电陶瓷片及其制备方法，尤其涉及一种高温叠层压电驱动器用压电陶瓷片及其制备方法；属于压电陶瓷技术领域。
背景技术
低温共烧叠层压电驱动器由陶瓷薄膜和电极交替堆叠而成。在制备过程中，由于银元素熔点相对较低，若烧结温度过高会促进银原子在陶瓷中扩散，导致泄漏电流增加。因此，如何通过低温结技术制备高温用压电陶瓷材料是目前陶瓷界的一个重要研究热点。
迄今为止，烧结制备的多层压电陶瓷的研究主要集中在PZT基陶瓷的组成上，这主要归功于其优越的压电性能。目前，通常采用三种方法来降低烧结温度。一是采用溶胶-凝胶法进行化学合成，可获得具有高表面性能的超细活性PZT粉末，增加了晶粒生长的驱动力。二是采用高压烧结可有效地排出了陶瓷中的孔洞，提高了密度，从而降低了烧结温度，提高了压电性能。三是在陶瓷中加入低温烧结助剂。其中，许多低熔点玻璃相沿晶界生成，促进了晶粒生长并使陶瓷致密化。此外，烧结助剂取代了钙钛矿固溶体中的Pb2+或Ti4+位，增加了结构缺陷，有利于原子扩散和电性能的改善。
发明内容
针对现有技术中存在的上述缺陷，本发明旨在提供一种在不降低压电性能情况下可降低烧结温度、减少PbO挥发的高温叠层压电驱动器用压电陶瓷片；本发明的另一个目的是提供一种制备该高温叠层压电驱动器用压电陶瓷片的方法。
为了实现上述目的，本发明所提供的压电陶瓷片的材料组成化学式为：Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt%Li2CO3+0.1wt%CuO+0.5wt% Bi2O3+0.5wt% Li2CO3。
为了制备上述高温叠层压电驱动器用压电陶瓷片，本发明采用如下方法：
1）按照化学式Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt%Li2CO3
+0.1wt%CuO+0.5wt% Bi2O3+0.5wt% Li2CO3的化学计量比秤取原料Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Li2CO3、Bi2O3、CuO，按4:1的质量比将Li2CO3分成A组料和B组料；
2）将原料Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Bi2O3、CuO与A组料混合、球磨4h，烘干，得磨料；
3）将所述磨料在920℃的条件下密闭煅烧2h，得预烧料；
4）将所述预烧料与B组料混合，球磨8h，烘干，过40目筛，得瓷粉；
5）向所述瓷粉中加入聚乙烯醇，混合、造粒、压片成型，得瓷坯；聚乙烯醇的加入量为瓷粉重量的5%；
6）将所述瓷坯送入烧结炉中，升温至600℃，排胶1h，然后升温至1100～1120℃，烧结4h，得瓷片；
7）所述瓷片印刷银浆，然后750℃条件下烧银，得被银瓷片；
8）将所述被银瓷片置于80℃的硅油中极化25min，极化电场强度为3.5kv/㎜。
与现有技术比较，本发明方法由于采用了上述技术方案，通过微量元素掺杂和铅锆钛比例的调整以及适量烧结助剂的加入可使陶瓷在烧过程结中产生液相，促进晶粒的长大（合适的烧结助剂会促进陶瓷晶粒的长大，过多或者过少都会导致陶瓷烧结不致密或者电性能降低），因此制备得到的压电陶瓷片在具有优良压电性能的同时还降低了烧结温度，减少了PbO的挥发，且压电陶瓷片具有较大的变形位移和较好的稳定性。
以下是采用本发明方法制备的高温叠层压电驱动器用压电陶瓷片与传统方法制备的压电陶瓷片性能对比数据。
表1：本发明方法制备的压电陶瓷与传统方法制备的压电陶瓷性能参数对照表
Figure DEST_PATH_GDA0003951197060000031
改良前后的陶瓷粉体性能差异很小，但烧结温度降低了近170℃，居里温度只降低了3℃，很适合应用于压电驱动器的高温场合。
附图说明
图1是本发明提供的高温叠层压电驱动器用压电陶瓷片粉体微观形貌图；
图2是本发明提供的高温叠层压电驱动器用压电陶瓷片的SEM图。
具体实施方式
下面结合具体的实施例对本发明作进一步说明：
实施例1
1）按照化学式Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt% Li2CO3
+0.1wt% CuO+0.5wt% Bi2O3+0.5wt% Li2CO3的化学计量比称取原料Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Li2CO3、Bi2O3、CuO，按4:1的质量比将Li2CO3分成A组料和B组料；
2）将Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Bi2O3、CuO与A组料混合、球磨4h，烘干得磨料；其中，锆球:料:去离子水=2:1:1，转速为460r/min；
3）将所述磨料放入加盖密封的坩埚中，以2℃/min的速率升温至920℃，保温2h，随炉冷却得预烧料；
4）将所述预烧料与B组料混合，球磨8h，烘干，过40目筛得瓷粉；其中，锆球:料:去离子水=2:1:0.6，转速为460r/min；
5）向所述瓷粉中加入聚乙烯醇，混合、造粒，压制成Φ10×1mm的瓷坯；聚乙烯醇的加入量为瓷粉重量的5%；
6）将所述瓷坯送入烧结炉中，以1℃/min的速率升温至600℃，排胶1h，然后以2℃/min的速率升温至1100～1120℃，烧结4h，随炉冷却得瓷片；
7）所述瓷片印刷银浆料，然后以3℃/min的速率升温至750℃，保温20min，随炉冷却得被银瓷片；
8）将所述被银瓷片置于80℃的硅油中极化25min，极化电场强度为3.5kv/㎜。
从图1～2可以看出：经过球磨后的粉体粒径均匀，保证了粉体的一致性。

Claims (2)

1.一种高温叠层压电驱动器用压电陶瓷片，其特征在于所述压电陶瓷片的材料组成化学式为：Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt% Li2CO3+0.1wt% CuO+0.5wt% Bi2O3+0.5wt% Li2CO3 。
2.一种制备权利要求1所述的高温叠层压电驱动器用压电陶瓷片的方法，其特征在于步骤如下：
1）按照化学式Pb0.97Sr0.03(Sb1/3Nb2/3)0.3(Ni1/3Nb2/3)0.7O3+2wt% Li2CO3+0.1wt% CuO+0.5wt% Bi2O3+0.5wt% Li2CO3的化学计量比秤取原料Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Li2CO3、Bi2O3、CuO，按4:1的质量比将Li2CO3分成A组料和B组料；
2）将原料Pb3O4、ZrO2、TiO2、SrCO3、Sb2O3、Nb2O5、NiO、Bi2O3、CuO与A组料混合、球磨4h，烘干，得磨料；
3）将所述磨料在920℃的条件下密闭煅烧2h，得预烧料；
4）将所述预烧料与B组料混合，球磨8h，烘干，过40目筛，得瓷粉；
5）向所述瓷粉中加入聚乙烯醇，混合、造粒、压片成型，得瓷坯；聚乙烯醇的加入量为瓷粉重量的5%；
6）将所述瓷坯送入烧结炉中，升温至600℃，排胶1h，然后升温至1100～1120℃，烧结4h，得瓷片；
7）所述瓷片印刷银浆，然后750℃条件下烧银，得被银瓷片；
8）将所述被银瓷片置于80℃的硅油中极化25min，极化电场强度为3.5kv/㎜。
CN202210989274.2A 2022-08-17 2022-08-17 高温叠层压电驱动器用压电陶瓷片及其制备方法 Pending CN115536392A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116514544A (zh) * 2023-04-25 2023-08-01 陕西声科电子科技有限公司 一种多层压电陶瓷的制备方法及超声探头

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116514544A (zh) * 2023-04-25 2023-08-01 陕西声科电子科技有限公司 一种多层压电陶瓷的制备方法及超声探头

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