CN115593078A - 一种基于真空热压固化粘接的压电陶瓷器件及其制备方法 - Google Patents

一种基于真空热压固化粘接的压电陶瓷器件及其制备方法 Download PDF

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CN115593078A
CN115593078A CN202211266179.6A CN202211266179A CN115593078A CN 115593078 A CN115593078 A CN 115593078A CN 202211266179 A CN202211266179 A CN 202211266179A CN 115593078 A CN115593078 A CN 115593078A
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piezoelectric ceramic
carbon fiber
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杨杰
丁伟
张伟东
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Jiangsu United Can Electronic Technology Co ltd
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Abstract

本发明公开了一种基于真空热压固化粘接的压电陶瓷器件及其制备方法，将金属薄片、碳纤维预浸料和压电陶瓷片堆叠成多层复合结构，将多层复合结构放置于真空加热加压设备，首先对复合多层结构预热，然后抽真空，去除粘接面胶液间的气泡，再施加压力机械夹紧多层复合结构，直至加温至碳纤维预浸料的固化温度进行保温固化，使得压电陶瓷薄片与金属薄片之间通过碳纤维预浸料牢固粘接。本发明在金属薄片上预制有若干微孔，在加热加压下，多余的环氧树脂粘接剂渗透不锈钢薄片上的微孔，有利于提高整体粘接强度。并利用碳纤维低膨胀系数介于压电陶瓷和不锈钢片之间的特点，有利于减小压电陶瓷器件粘接层内应力，提高压电陶瓷器件长期工作可靠性。

Description

一种基于真空热压固化粘接的压电陶瓷器件及其制备方法
技术领域
本发明属于压电材料技术领域，具体涉及一种基于真空热压固化粘接的压电陶瓷器件及其制备方法。
背景技术
压电陶瓷是常用的电子智能材料，在许多应用场合需要使用环氧树脂粘接处理，其中包括与不锈钢材料的大面积粘接，由于不锈钢材料表面光滑、材料密度高，尽管采用常规打磨处理，但粘接面间难以完全去除空气，固化后粘接面存在微小气泡，使得器件总体粘接强度差强人意；另外，压电陶瓷材料热膨胀系数低，与其他热膨胀系数高的金属材料在高温下粘接，存在粘接层内应力大的缺陷，影响压电器件长期工作的可靠性。
发明内容
鉴于以上缺陷，本发明所要解决的第一技术问题是提供一种基于真空热压固化粘接的压电陶瓷器件的制备方法；本发明所要解决的第二技术问题是提供该方法所制备的基于真空热压固化粘接的压电陶瓷器件。
为了解决上述技术问题，本发明所采用的技术方案如下：
一种基于真空热压固化粘接的压电陶瓷器件的制备方法，包括以下步骤：将金属薄片、碳纤维预浸料和压电陶瓷片堆叠成多层复合结构，将多层复合结构放置于真空加热加压设备，首先对多层复合结构预热，然后抽真空，去除粘接面胶液间的气泡，再施加压力机械夹紧多层复合结构，直至加温至碳纤维预浸料的固化温度进行保温固化，使得压电陶瓷薄片与金属薄片之间通过碳纤维预浸料牢固粘接。
进一步的，于60～90℃抽真空至10Pa以下，去除粘接面胶液间的气泡。
进一步的，施加压力1～1.5MPa机械夹紧多层复合结构。
进一步的，固化温度为120～130℃，固化时间为90～100分钟。
进一步的，金属薄片上预制有若干微孔；碳纤维预浸料包括碳纤维和高温环氧树脂，碳纤维预浸料的高温环氧树脂在真空加热加压设备中渗过金属薄片上的微孔。
进一步的，碳纤维预浸料的膨胀系数介于压电陶瓷片和金属薄片之间。
一种基于真空热压固化粘接的压电陶瓷器件包括预制有若干微孔的金属薄片、碳纤维预浸料和压电陶瓷片，压电陶瓷片通过碳纤维预浸料与金属薄片固定连接。
进一步的，金属薄片为不锈钢薄片。
进一步的，压电陶瓷片为两片以上的压电陶瓷结构。
进一步的，碳纤维预浸料分别设置在金属薄片的两侧，压电陶瓷片分别固定在碳纤维预浸料的外侧。
有益效果：相比于现有技术，本发明的优点为：
1)本发明利用碳纤维低膨胀系数介于压电陶瓷和不锈钢片之间的特点，作为中间过渡层，有利于减小压电陶瓷器件粘接层内应力，提高压电陶瓷器件长期工作可靠性。
2)本发明采用真空热压固化粘接，将极大提高不锈钢薄片与压电陶瓷片间的粘接强度，延长压电陶瓷器件的使用寿命。
3)本发明在金属薄片上预制有若干微孔，在加热加压的情况下，多余的环氧树脂粘接剂渗透不锈钢薄片上的微孔，有利于提高整体粘接强度。
4)本申请相比于加压高温固化工艺和常温抽真空，加压高温固化工艺，整体粘接强度更强。
附图说明
图1是本发明的粘接结构爆炸图；
图2是多层材料粘接复合的样件粘接在力试验机底座上图；
图3是使用划片机在多层材料粘接区域开槽图；
图4是在分割出的5×5mm区域上粘接试验机挂钩图。
具体实施方式
下面结合具体实施例对本发明进一步进行描述。这些实施例仅用于说明本发明而不用于限制本发明的范围。在不背离本发明精神和实质的情况下，对本发明方法、步骤或条件所作的修改或替换，均属于本发明的范围。以下实施例中如无特殊说明，实施例中所用的技术手段均为本领域技术人员所熟知的常规手段。
实施例1
如图1所示，本申请公开了一种基于真空热压固化粘接的压电陶瓷器件，包括金属薄片1、碳纤维预浸料2和压电陶瓷片3，压电陶瓷片3通过碳纤维预浸料2与金属薄片1固定连接。
其中，金属薄片1上预制有若干微孔4，碳纤维预浸料2包括碳纤维和高温环氧树脂，利用碳纤维预浸的高温环氧树脂做粘接剂，碳纤维预浸料2的高温环氧树脂渗过金属薄片上的微孔，固化后粘接金属薄片1及其两侧的碳纤维预浸料，有利于提高整体粘接强度。
金属薄片1为不锈钢薄片。碳纤维预浸料2的膨胀系数介于压电陶瓷片3和不锈钢薄片之间。采用碳纤维预浸料2粘接压电陶瓷片3和不锈钢薄片，利用碳纤维低膨胀系数介于压电陶瓷和不锈钢片之间的特点，作为中间过渡层，有利于减小压电陶瓷器件粘接层内应力，提高压电陶瓷器件长期工作可靠性。
压电陶瓷片3为两片以上的压电陶瓷结构，碳纤维预浸料2分别设置在不锈钢薄片的两侧，压电陶瓷片分别固定在碳纤维预浸料2的外侧。不锈钢薄片、碳纤维预浸料2和压电陶瓷片3通过真空热压固化粘接，再通过机械夹紧组成压电陶瓷器件。
实施例2
将不锈钢薄片、碳纤维预浸料和压电陶瓷片堆叠成多层复合结构，放置于真空加热加压设备，采用高温抽真空，加压高温固化工艺进行粘接，首先于60～90℃抽真空至10Pa以下，去除粘接面胶液间的气泡，再施加压力1～1.5MPa机械夹紧多层复合结构，多层复合结构加压，挤压环氧树脂粘接剂，使得环氧树脂既有一定的粘接强度，也保持相对较薄的厚度，多余的环氧树脂粘接剂渗透不锈钢薄片上的微孔，多层复合结构维持加压，然后加温至碳纤维预浸料的固化温度120～130℃下固化90～100分钟，使得压电陶瓷片与不锈钢薄片牢固粘接，制得压电陶瓷器件。
对比例1
将不锈钢薄片、碳纤维预浸料和压电陶瓷片堆叠，常温下夹持在固化模具内，采用加压高温固化工艺进行粘接，施加压力1～1.5MPa，固化温度120～130℃下固化90～100分钟，制得压电陶瓷器件。
对比例2
将不锈钢薄片、碳纤维预浸料和压电陶瓷片堆叠，常温下夹持在固化模具内，采用常温抽真空，加压高温固化工艺进行粘接，施加压力1～1.5MPa，固化温度120～130℃下固化90～100分钟，制得压电陶瓷器件。
将实施例2、对比例1和对比例2所制得的压电陶瓷器件进行粘结强度对比，如表1所示，采用高温抽真空，加压高温固化工艺，将极大提高不锈钢薄片与压电陶瓷片间的粘接强度，延长压电陶瓷器件的使用寿命。
表1粘接强度对比表
Figure BDA0003894301670000041
粘接强度测试方法如下：
1)将多层材料粘接复合的样件，如图2所示，使用环氧树脂牢固粘接在力试验机底座上；
2)使用划片机在多层材料粘接区域开槽，如图3所示，切割出5×5mm方块，槽深度以接触中间层钢片为止；
3)如图4所示，在分割出的5×5mm区域上粘接试验机挂钩；
4)将测试样件安装在力试验机上，通过挂钩施加拉力，直到粘接处拉脱、剥离。钢片处是粘接强度最低的部位，受力后这个部位会被拉脱；
5)计算拉脱时的力试验机显示的数值，及与受力区域面积的比值，得到粘接强度。
以上详细描述了本发明的优选实施方式，但是，本发明并不局限于此。在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，包括各个技术特征以任何其它的合适方式进行组合，这些简单变型和组合同样应当视为本发明所公开的内容，均属于本发明的保护范围。

Claims (10)

1.一种基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，包括以下步骤：将金属薄片、碳纤维预浸料和压电陶瓷片堆叠成多层复合结构，将多层复合结构放置于真空加热加压设备，首先对复合多层结构预热，然后抽真空，去除粘接面胶液间的气泡，再施加压力机械夹紧多层复合结构，直至加温至碳纤维预浸料的固化温度进行保温固化，使得压电陶瓷薄片与金属薄片之间通过碳纤维预浸料牢固粘接。
2.根据权利要求1所述的基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，于60～90℃抽真空至10Pa以下，去除粘接面胶液间的气泡。
3.根据权利要求1所述的基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，施加压力1～1.5MPa机械夹紧多层复合结构。
4.根据权利要求1所述的基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，固化温度为120～130℃，固化时间为90～100分钟。
5.根据权利要求1所述的基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，所述金属薄片上预制有若干微孔；所述碳纤维预浸料包括碳纤维和高温环氧树脂，所述碳纤维预浸料的高温环氧树脂在真空加热加压设备中渗过金属薄片上的微孔。
6.根据权利要求1所述的基于真空热压固化粘接的压电陶瓷器件的制备方法，其特征在于，所述碳纤维预浸料的膨胀系数介于压电陶瓷片和金属薄片之间。
7.权利要求1所述的制备方法制备的基于真空热压固化粘接的压电陶瓷器件，其特征在于，包括预制有若干微孔(4)的金属薄片(1)、碳纤维预浸料(2)和压电陶瓷片(3)，所述压电陶瓷片(3)通过碳纤维预浸料(2)与金属薄片(1)固定连接。
8.根据权利要求7所述的基于真空热压固化粘接的压电陶瓷器件，其特征在于，所述金属薄片(1)为不锈钢薄片。
9.根据权利要求7所述的基于真空热压固化粘接的压电陶瓷器件，其特征在于，所述压电陶瓷片(3)为两片以上的压电陶瓷结构。
10.根据权利要求7所述的基于真空热压固化粘接的压电陶瓷器件，其特征在于，所述碳纤维预浸料(2)分别设置在金属薄片(1)的两侧，压电陶瓷片(3)分别固定在碳纤维预浸料(2)的外侧。
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CN102255042A (zh) * 2011-07-08 2011-11-23 南京邮电大学 一种双压电陶瓷基片俘能器及其制备方法
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