CN107140979A - 一种提高中介电常数微波介质陶瓷微波介电性能的方法 - Google Patents

一种提高中介电常数微波介质陶瓷微波介电性能的方法 Download PDF

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CN107140979A
CN107140979A CN201710281880.8A CN201710281880A CN107140979A CN 107140979 A CN107140979 A CN 107140979A CN 201710281880 A CN201710281880 A CN 201710281880A CN 107140979 A CN107140979 A CN 107140979A
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microwave dielectric
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dielectric constant
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李玲霞
孙正
张博文
吕笑松
罗伟嘉
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Abstract

本发明公开了一种提高中介电常数微波介质陶瓷微波介电性能的方法，其化学式为：Ba[(Co0.3Zn0.7)1/3Nb2/3]O3；先将BaCO3、CoO、ZnO、Nb2O5按化学计量式Ba[(Co0.3Zn0.7)1/3Nb2/3]O3进行配料，粉料经球磨、烘干、过筛后于1000～1200℃预烧，再经二次球磨、烘干、过筛后，压制成型为坯体，坯体于1350℃～1450℃烧结，之后以1℃/min～0.05℃/min的降温速率降温至1000℃～1200℃，制成具有低损耗的中介电常数微波介质陶瓷。本发明介电常数εr为33.5～34.2，最佳Qf值为65800。该方法简化了材料的制备工艺流程，节省了时间成本和能源成本。

Description

一种提高中介电常数微波介质陶瓷微波介电性能的方法
技术领域
本发明属于一种以成分为特征的陶瓷组合物，尤其涉及一种以Ba[(Co0.3Zn0.7)1/ 3Nb2/3]O3为化学式，提高制品的Qf值的方法。
背景技术
新一代信息技术不断涌现，微波介质陶瓷的新兴应用领域也在不断扩展，如4G移动通信，数字电视，频率可调滤波器，频率捷变雷达等。微波介质陶瓷材料自20世纪90年代产生分化以来，主要朝着探索具有更高介电常数(εr>100)的新体系和追求超低损耗化(尤其是中介电常数类(20～40))两个重要方向来开展。目前，微波介质陶瓷元器件正向着小型化、低损耗化、化成本、工作高频化和多频化的趋势发展。
Ba[(Zn,Co)1/3Nb2/3]O3固溶体，是一种温度稳定的低损耗微波介质陶瓷，近年来已逐渐成为中介电常数微波介质陶瓷的主流材料。然而，大多数铌酸盐由于较差的热稳定性会在烧结过程中发生无序相变，介电损耗较大，因而后续的热处理过程必不可少，使制备工艺过程更加复杂。
发明内容
本发明的目的，是为了提高Ba[(Co0.3Zn0.7)1/3Nb2/3]O3制品的Qf值，适应中介电常数微波介质陶瓷低损耗发展的需要。以BaCO3、CoO、ZnO、Nb2O5为原料，通过简单固相法制备一种具有低损耗的中介电常数微波介质陶瓷体系。
本发明通过如下技术方案予以实现。
一种提高中介电常数微波介质陶瓷微波介电性能的方法，其化学式为：Ba[(Co0.3Zn0.7)1/3Nb2/3]O3；
具体实施步骤如下：
(1)将BaCO3、CoO、ZnO、Nb2O5按化学计量式Ba[(Co0.3Zn0.7)1/3Nb2/3]O3进行配料；将粉料放入聚酯罐中，加入去离子水和锆球后，球磨4～8小时；
(2)将步骤(1)球磨后的原料放入干燥箱中，于100～120℃烘干，然后过40目筛；
(3)将步骤(2)过筛后的原料放入中温炉中，于1000～1200℃预烧，保温3～6小时；
(4)将步骤(3)预烧后的原料，放入球磨罐中，加入氧化锆球和去离子水，球磨10～15小时，烘干后过筛，再用粉末压片机以1～3MPa的压力压制成坯体；
(5)将步骤(4)的坯体于1350℃～1450℃烧结，保温4～6小时，之后以1℃/min～0.05℃/min的降温速率降温至1000℃～1200℃，然后自然冷却至室温，制成具有低损耗的中介电常数微波介质陶瓷。
所述步骤(1)的BaCO3、CoO、ZnO、Nb2O5为分析纯试剂。
所述步骤(4)的坯体直径为15mm，厚度为6mm。
所述步骤(5)的降温速率为0.2℃/min，降温的温度为1100℃。
本发明通过固相法，结合合适的降温速率和温度，制备了一低损耗的中介电常数微波介质陶瓷。其介电常数εr为33.5～34.2，最佳Qf值为65800。该制备方法简化了材料的制备工艺流程，节省了时间成本和能源成本。
具体实施方式
本发明以分析纯BaCO3、CoO、ZnO、Nb2O5为初始原料，通过固相法制备陶瓷电容器用中介电常数微波介质陶瓷，具体实施例如下：
实施例1
1.将分析纯BaCO3、CoO、ZnO、Nb2O5按化学计量式Ba[(Co0.3Zn0.7)1/3Nb2/3]O3进行配料，配比为：14.9497g BaCO3、0.5648g CoO、1.439gZnO，6.6459gNb2O5，将约20g的混合粉料放入尼龙罐中，加入200ml去离子水，加入150g的锆球后，在行星式球磨机上球磨6小时，转速为400转/分；
2.将球磨后的原料置于干燥箱中，于100℃烘干，而后过40目筛；
3.将过筛后的原料放入中温炉，于1100℃预烧，保温4小时；
4.将步骤3预烧后的原料外加0.7wt％PVA进行混合，放入球磨罐中，加入氧化锆球和去离子水，球磨12小时，烘干后过筛，再用粉末压片机以2MPa的压力压制成坯体；
5.将坯体在1400℃烧结，保温6小时，之后以0.2℃/min的降温速率降温至1100℃，然后自然冷却至室温，制成具有低损耗的中介电常数微波介质陶瓷。
6.用网络分析仪测试其微波介电性能，其性能如下：
介电常数：33.8
品质因数：65800
谐振频率温度系数为：26.2ppm/℃
实施例2～8
实施例2～8的降温速率与微波介电性能至关重要，详见表1，其余制备过程与实施例1完全相同。
表1
本发明并不局限于上述实施例，很多细节的变化是可能的，但这并不因此违背本发明的范围和精神。

Claims (4)

1.一种提高中介电常数微波介质陶瓷微波介电性能的方法，其化学式为：Ba[(Co0.3Zn0.7)1/3Nb2/3]O3。
具体实施步骤如下：
(1)将BaCO3、CoO、ZnO、Nb2O5按化学计量式Ba[(Co0.3Zn0.7)1/3Nb2/3]O3进行配料；将粉料放入聚酯罐中，加入去离子水和锆球后，球磨4～8小时；
(2)将步骤(1)球磨后的原料放入干燥箱中，于100～120℃烘干，然后过40目筛；
(3)将步骤(2)过筛后的原料放入中温炉中，于1000～1200℃预烧，保温3～6小时；
(4)将步骤(3)预烧后的原料，放入球磨罐中，加入氧化锆球和去离子水，球磨10～15小时，烘干后过筛，再用粉末压片机以1～3MPa的压力压制成坯体；
(5)将步骤(4)的坯体于1350℃～1450℃烧结，保温4～6小时，之后以1℃/min～0.05℃/min的降温速率降温至1000℃～1200℃，然后自然冷却至室温，制成具有低损耗的中介电常数微波介质陶瓷。
2.根据权利要求1所述的一种提高中介电常数微波介质陶瓷微波介电性能的方法，其特征在于，所述步骤(1)的BaCO3、CoO、ZnO、Nb2O5为分析纯试剂。
3.根据权利要求1所述的一种提高中介电常数微波介质陶瓷微波介电性能的方法，其特征在于，所述步骤(4)的坯体直径为15mm，厚度为6mm。
4.根据权利要求1所述的一种提高中介电常数微波介质陶瓷微波介电性能的方法，其特征在于，所述步骤(5)的降温速率为0.2℃/min，降温的温度为1100℃。
CN201710281880.8A 2017-04-26 2017-04-26 一种提高中介电常数微波介质陶瓷微波介电性能的方法 Pending CN107140979A (zh)

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Publication number Priority date Publication date Assignee Title
CN111908919A (zh) * 2020-07-30 2020-11-10 东莞市翔通光电技术有限公司 一种微波介质陶瓷制备方法及微波介质陶瓷
CN111943691A (zh) * 2020-07-31 2020-11-17 东莞市翔通光电技术有限公司 一种钡钴锌铌体系微波介质陶瓷烧结退火工艺

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CN102992762A (zh) * 2012-11-16 2013-03-27 武汉凡谷电子技术股份有限公司 钡钴锌铌基微波介质陶瓷及其制备方法
CN105000881A (zh) * 2015-07-21 2015-10-28 天津大学 一种铌酸盐中介电常数微波介质陶瓷材料及其制备方法
CN105924167A (zh) * 2016-04-20 2016-09-07 苏州艾福电子通讯股份有限公司 微波介质陶瓷粉及其方法、微波介质陶瓷、微波元器件

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992762A (zh) * 2012-11-16 2013-03-27 武汉凡谷电子技术股份有限公司 钡钴锌铌基微波介质陶瓷及其制备方法
CN105000881A (zh) * 2015-07-21 2015-10-28 天津大学 一种铌酸盐中介电常数微波介质陶瓷材料及其制备方法
CN105924167A (zh) * 2016-04-20 2016-09-07 苏州艾福电子通讯股份有限公司 微波介质陶瓷粉及其方法、微波介质陶瓷、微波元器件

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111908919A (zh) * 2020-07-30 2020-11-10 东莞市翔通光电技术有限公司 一种微波介质陶瓷制备方法及微波介质陶瓷
CN111943691A (zh) * 2020-07-31 2020-11-17 东莞市翔通光电技术有限公司 一种钡钴锌铌体系微波介质陶瓷烧结退火工艺

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Application publication date: 20170908