CN107892565A - 一种陶瓷电容器介质 - Google Patents

一种陶瓷电容器介质 Download PDF

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CN107892565A
CN107892565A CN201711232358.7A CN201711232358A CN107892565A CN 107892565 A CN107892565 A CN 107892565A CN 201711232358 A CN201711232358 A CN 201711232358A CN 107892565 A CN107892565 A CN 107892565A
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ceramic capacitor
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capacitor dielectric
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柴文权
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Anhui State Run Drying Equipment Co Ltd
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Anhui State Run Drying Equipment Co Ltd
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Abstract

本发明公开了一种陶瓷电容器介质，涉及电子元件技术领域，该介质包括以下原料制成：BaTiO3、SrZrO3、BaZrO3、CaTiO3、MgSnO3、CeO2、ZnO、Co2O3、BaSiO3和Gd2O3；其制备方法是通过对原料的球磨、烘干、造粒、制片等操作制得的。本发明的陶瓷电容器介质电常数高，耐电压高，并且在使用过程中对环境无污染，本发明所要解决的另一技术问题是提供上述陶瓷电容器的电介质的一种制备方法，这种制备方法成本较低，并且在制备过程中对环境无污染，适宜推广应用。

Description

一种陶瓷电容器介质
技术领域
本发明涉及电子元件技术领域，具体涉及一种陶瓷电容器介质。
背景技术
彩电、计算机、通迅、航空航天、导弹、航海等领域迫切需要击穿电压高、温度稳定性好、可靠性高、小型化、大容量的陶瓷电容器。为了实现陶瓷电容器的小型化和大容量，要求陶瓷电容器的电介质具有高介电常数；为了实现陶瓷电容器的击穿电压高，要求陶瓷电容器的电介质耐电压高；同时，随着人们对身体健康及环境保护的日益重视，要求陶瓷电容器的电介质在制备、使用及废弃的过程中不会对人体和环境造成危害，因而要求陶瓷电容器的电介质不含铅、镉等金属元素。
通常用于生产高压陶瓷电容器的电介质中含有一定量的铅和镉，这不仅在陶瓷电容器的生产、使用和废弃过程中对人体和环境造成危害，而且对陶瓷电容器的性能稳定性也有不良影响,并且现有的陶瓷电容器介质介电常数和耐电压性仍不够理想，实际应用中存在诸多缺陷不足，另外，目前陶瓷电容器介质在制备过程中所需烧结温度高，制备繁琐，也需改进解决。
发明内容
针对现有技术中存在的问题，本发明提供了一种陶瓷电容器介质，该种陶瓷电容器电介质电常数高，耐电压高，并且在使用过程中对环境无污染，本发明所要解决的另一技术问题是提供上述陶瓷电容器的电介质的一种制备方法，这种制备方法成本较低，并且在制备过程中对环境无污染。
为了达到上述目的，本发明通过以下技术方案来实现的：
一种陶瓷电容器介质，包括以下按重量份数计的原料制成：BaTiO340-60份、SrZrO310-20份、BaZrO310-20份、CaTiO38-12份、MgSnO38-12份、CeO22-4份、ZnO 2-4份、Co2O32-4份、BaSiO31-3份和Gd2O31-3份；
该种陶瓷电容器介质的制备方法如下：
(1)先将配好的原料用蒸馏水或去离子水采用行星球磨机球磨混合，质量比料:球:水＝1:3:0.6-1.0，球磨4.5-7.5h后，烘干得干粉料；
(2)再在干粉料中加入粘合剂进行造粒，混研后过40-60目筛；
(3)最后在20-30Mpa压力下进行干压成生坯片，然后在温度为1140-1270℃下保温2-3小时进行排胶和烧结，再在780-860℃下保温15-25min进行烧银，形成银电极，再焊引线，进行包封，即得陶瓷电容器。
进一步地，上述的陶瓷电容器介质包括以下按重量份数计的原料制成：BaTiO350份、SrZrO315份、BaZrO315份、CaTiO310份、MgSnO310份、CeO23份、ZnO 3份、Co2O33份、BaSiO32份和Gd2O32份。
进一步地，上述的BaTiO3是采用如下工艺制备：将常规的化学原料BaCO3和TiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1120-1260℃保温80-120分钟，固相反应合成BaTiO3，冷却后研磨过150-250目筛，备用。
进一步地，上述的SrZrO3是采用如下工艺制备：将常规的化学原料SrCO3和ZrO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1150-1250℃保温80-100分钟，固相反应合成SrZrO3，冷却后研磨过150-250目筛，备用。
进一步地，上述的MgSnO3是采用如下工艺制备：将常规的化学原料MgO和SnO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1160-1280℃保温100-120分钟，固相反应合成MgSnO3，冷却后研磨过150-250目筛，备用。
进一步地，上述的CaTiO3是采用如下工艺制备：将常规的化学原料CaO和TiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1110-1220℃保温80-120分钟，固相反应合成CaTiO3，冷却后研磨过150-250目筛，备用。
进一步地，上述的CaZrO3是采用如下工艺制备：将常规的化学原料CaO和ZrO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1120-1240℃保温100-140分钟，固相反应合成CaZrO3，冷却后研磨过150-250目筛，备用。
进一步地，上述的BaSiO3是采用如下工艺制备：将常规的化学原料BaO和SiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1140-1260℃保温110-130分钟，固相反应合成CaZrO3，冷却后研磨过150-250目筛，备用。
优选地，上述的粘合剂采用重量百分比浓度为10％的聚乙烯醇水溶液,该聚乙烯醇水溶液的重量为经所述干粉料重量的8-10％。
本发明具有如下的有益效果：
(1)本发明的陶瓷电容器介质中不含铅和镉等有害元素，在使用过程中对环境无污染，且在生产过程对工人无毒害副作用；
(2)本发明的陶瓷电容器介质介电常数高(介电常数达20000以上)，由于介电常数高，因而能实现陶瓷电容器的大容量和小型化，符合陶瓷电容器的发展趋势，能降低陶瓷电容器的成本；
(3)本发明的陶瓷电容器介质耐电压强度高，直流耐电压可达20kV/mm以上，交流耐电压可达15kV/mm以上，能扩大陶瓷电容器的应用范围；电容温度变化率小，符合Y5V特性的要求，而且介质损耗小(介质损耗小于1％)，因而陶瓷电容器在使用过程中性能稳定性好，安全性高。
(4)本发明的陶瓷电容器介质在制备方法上还具有如下优点：烧结温度较低(采用中温烧结，烧结温度为1220-1280℃)，大大降低高压陶瓷电容器的成本；并且利用不含铅和镉的电容器陶瓷普通化学原料制备陶瓷电容器的电介质，在制备过程中对环境无污染。总而言之，本发明的陶瓷电容器的电介质介电常数高，耐电压高，在制备和使用过程中对环境无污染，并且能降低陶瓷电容器的成本，适合于制备单片陶瓷电容器和多层片式陶瓷电容器。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步描述，以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例1
一种陶瓷电容器介质，称取以下原料，如下列表1所示：
表1
表2：上述部分原料制备工艺：
上述的陶瓷电容器介质的制备方法按照以下步骤进行：
(1)先将配好的原料用蒸馏水或去离子水采用行星球磨机球磨混合，质量比料:球:水＝1:3:0.6，球磨4.5h后，烘干得干粉料；
(2)再在干粉料中加入粘合剂进行造粒，混研后过40目筛；
(3)最后在20Mpa压力下进行干压成生坯片，然后在温度为1140℃下保温2小时进行排胶和烧结，再在780℃下保温15min进行烧银，形成银电极，再焊引线，进行包封，即制得本发明的陶瓷电容器介质。
上述的粘合剂采用重量百分比浓度为10％的聚乙烯醇水溶液,该聚乙烯醇水溶液的重量为经所述干粉料重量的8％。
实施例2
一种陶瓷电容器介质，称取以下原料，如下列表3所示：
表3
组份 重量(kg)
BaTiO3 50
SrZrO3 15
BaZrO3 15
CaTiO3 10
MgSnO3 10
CeO2 3
ZnO 3
Co2O3 3
BaSiO3 2
Gd2O3 2
表4：上述部分原料制备工艺：
上述的陶瓷电容器介质的制备方法按照以下步骤进行：
(1)先将配好的原料用蒸馏水或去离子水采用行星球磨机球磨混合，质量比料:球:水＝1:3:0.8，球磨5.5h后，烘干得干粉料；
(2)再在干粉料中加入粘合剂进行造粒，混研后过50目筛；
(3)最后在25Mpa压力下进行干压成生坯片，然后在温度为1210℃下保温2.5小时进行排胶和烧结，再在820℃下保温20min进行烧银，形成银电极，再焊引线，进行包封，即制得本发明的陶瓷电容器介质。
上述的粘合剂采用重量百分比浓度为10％的聚乙烯醇水溶液,该聚乙烯醇水溶液的重量为经所述干粉料重量的9％。
实施例3
一种陶瓷电容器介质，称取以下原料，如下列表5所示：
表5
表6：上述部分原料制备工艺：
上述的陶瓷电容器介质的制备方法按照以下步骤进行：
(1)先将配好的原料用蒸馏水或去离子水采用行星球磨机球磨混合，质量比料:球:水＝1:3:1.0，球磨7.5h后，烘干得干粉料；
(2)再在干粉料中加入粘合剂进行造粒，混研后过60目筛；
(3)最后在30Mpa压力下进行干压成生坯片，然后在温度为1270℃下保温3小时进行排胶和烧结，再在860℃下保温25min进行烧银，形成银电极，再焊引线，进行包封，即制得本发明的陶瓷电容器介质。
上述的粘合剂采用重量百分比浓度为10％的聚乙烯醇水溶液,该聚乙烯醇水溶液的重量为经所述干粉料重量的10％。
性能检测
上述实施例1-3制得的陶瓷电容器介质进行介质常数、介质损耗、绝缘电阻、电容温度变化率、耐电压相关性能的检测，记录于下表7中；
表7
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (9)

1.一种陶瓷电容器介质，其特征在于，包括以下按重量份数计的原料制成：BaTiO3 40-60份、SrZrO3 10-20份、BaZrO3 10-20份、CaTiO3 8-12份、MgSnO38-12份、CeO2 2-4份、ZnO 2-4份、Co2O3 2-4份、BaSiO3 1-3份和Gd2O3 1-3份；
该种陶瓷电容器介质的制备方法如下：
(1)先将配好的原料用蒸馏水或去离子水采用行星球磨机球磨混合，质量比料:球:水＝1:3:0.6-1.0，球磨4.5-7.5h后，烘干得干粉料；
(2)再在干粉料中加入粘合剂进行造粒，混研后过40-60目筛；
(3)最后在20-30Mpa压力下进行干压成生坯片，然后在温度为1140-1270℃下保温2-3小时进行排胶和烧结，再在780-860℃下保温15-25min进行烧银，形成银电极，再焊引线，进行包封，即得陶瓷电容器。
2.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，包括以下按重量份数计的原料制成：BaTiO3 50份、SrZrO3 15份、BaZrO3 15份、CaTiO3 10份、MgSnO3 10份、CeO2 3份、ZnO 3份、Co2O3 3份、BaSiO3 2份和Gd2O3 2份。
3.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述BaTiO3是采用如下工艺制备：将常规的化学原料BaCO3和TiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1120-1260℃保温80-120分钟，固相反应合成BaTiO3，冷却后研磨过150-250目筛，备用。
4.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述SrZrO3是采用如下工艺制备：将常规的化学原料SrCO3和ZrO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1150-1250℃保温80-100分钟，固相反应合成SrZrO3，冷却后研磨过150-250目筛，备用。
5.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述MgSnO3是采用如下工艺制备：将常规的化学原料MgO和SnO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1160-1280℃保温100-120分钟，固相反应合成MgSnO3，冷却后研磨过150-250目筛，备用。
6.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述CaTiO3是采用如下工艺制备：将常规的化学原料CaO和TiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1110-1220℃保温80-120分钟，固相反应合成CaTiO3，冷却后研磨过150-250目筛，备用。
7.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述CaZrO3是采用如下工艺制备：将常规的化学原料CaO和ZrO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1120-1240℃保温100-140分钟，固相反应合成CaZrO3，冷却后研磨过150-250目筛，备用。
8.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述BaSiO3是采用如下工艺制备：将常规的化学原料BaO和SiO2按1:1摩尔比配料，研磨混合均匀后放入氧化铝坩埚内于1140-1260℃保温110-130分钟，固相反应合成CaZrO3，冷却后研磨过150-250目筛，备用。
9.根据权利要求1所述的一种陶瓷电容器介质，其特征在于，所述粘合剂采用重量百分比浓度为10％的聚乙烯醇水溶液,该聚乙烯醇水溶液的重量为经所述干粉料重量的8-10％。
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CN1195867A (zh) * 1997-02-25 1998-10-14 Tdk株式会社 高介电常数介电陶瓷组合物及其制备方法
CN102627456A (zh) * 2012-04-23 2012-08-08 江苏大学 一种低损耗高压陶瓷电容器介质
CN107089829A (zh) * 2017-06-07 2017-08-25 合肥励仙电力工程有限公司 一种电容器电介质及其制备方法
CN107216145A (zh) * 2017-06-02 2017-09-29 合肥华盖生物科技有限公司 一种陶瓷电容器的电介质及其制备工艺

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1195867A (zh) * 1997-02-25 1998-10-14 Tdk株式会社 高介电常数介电陶瓷组合物及其制备方法
CN102627456A (zh) * 2012-04-23 2012-08-08 江苏大学 一种低损耗高压陶瓷电容器介质
CN107216145A (zh) * 2017-06-02 2017-09-29 合肥华盖生物科技有限公司 一种陶瓷电容器的电介质及其制备工艺
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