CN107056278A - Tm模通信用陶瓷介质谐振器制备工艺 - Google Patents

Tm模通信用陶瓷介质谐振器制备工艺 Download PDF

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CN107056278A
CN107056278A CN201710003314.0A CN201710003314A CN107056278A CN 107056278 A CN107056278 A CN 107056278A CN 201710003314 A CN201710003314 A CN 201710003314A CN 107056278 A CN107056278 A CN 107056278A
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sintering
moulds
microwave
communication
dielectric resonator
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吴娟英
肖练平
陈功田
何艳红
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CHENZHOU GONGTIAN ELECTRONIC CERAMICS TECHNOLOGY Co Ltd
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Abstract

本发明涉及一种TM模通信用陶瓷介质谐振器制备工艺。应用于卫星通信与移动通信***中介质谐振器、滤波器以及振荡器和GPS全球定位***等微波元器件中。该微波介质陶瓷的制造原料含有：氧化钡（BaO），二氧化钛（TiO2），氧化锌（ZnO）和五氧化二铌（Nb2O5）以及微量掺杂添加物氧化铜（CuO）、氧化锰(MnO)等组分；将上述组分经过配料、混合球磨、造粒、成型、装钵、排胶和烧结的固相反应工序烧制成微波介质陶瓷。本发明具有低的烧结温度、节能环保、高介电常数、高品质因数和稳定的谐振频率温度特性。

Description

TM模通信用陶瓷介质谐振器制备工艺
技术领域
本发明涉及一种TM模通信用陶瓷介质谐振器制备工艺，该谐振器应用于L波段卫星通信与移动通信***中介质谐振器、滤波器以及振荡器和GPS全球定位***等微波元器件中。
背景技术
目前，随着我国航天科技、卫星通讯的快速发展，届时将形成多波段的固定广播通信卫星、专用广播卫星、直播卫星、移动广播卫星、移动通信卫星和专用GPS全球定位，安全导航卫星。以及以IP业务为主的数据业务对传输带宽需求的进一步增长，更长波长的L波段的开发和应用越来越成为人们关注的重点。同时也带动了对相应的微波谐振器、滤波器、振荡器、微波电容器等相关微波元器件的需求。卫星通讯广播通常应用的频率为S、L、C、Ku波段，对于应用于L波段的微波介质陶瓷要求具有高的介电常数（35～45）、高品质因数稳定的谐振频率温度特性和体积小，价格便宜等。
BaTiO3，BaTi4O9及ZnNb2O6材料是一种性能优异的钛酸盐、铌酸盐微波陶瓷，通过掺杂及其它手段可以获得具有合适的且可调的介电常数，高品质因数和良好稳定的谐振频率温度特性。在现有技术中BaTiO3，BaTi4O9及ZnNb2O6一般采用煅烧二步工艺制备，煅烧工序所需温度高，能耗大，制造成本高。
发明内容
本发明所要解决的技术问题是：提供一种TM模通信用陶瓷介质谐振器制备工艺，其具有低的烧结温度、高介电常数、高品质因数和稳定的谐振频率温度特性。其应用于L波段介质谐振器、滤波器、振荡器、GPS全球定位，安全导航***中，可以使体积小价格便宜。
本发明所要解决的技术方案如下：一种TM模通信用陶瓷介质谐振器制备工艺，制造原料中含有：氧化钡（BaO），二氧化钛（TiO2），氧化锌（ZnO）和五氧化二铌（Nb2O5）以及微量掺杂添加物组分；其特征是:所述微量掺杂添加物是氧化锰(MnO)、氧化铜(CuO)组分，各组分的含量的重量百分比为：
氧化钡 40%～50%； 二氧化钛 40%～46%；
氧化锌 4%～10%； 五氧化二铌5%～10 %；
微量添加物 氧化锰 0.3%～0.45 %；氧化铜 0.0%～0.3 %；
将上述组分经过配料、混合球磨、造粒、成型、装钵、排胶和烧结的固相反应工序烧制成微波介质陶瓷,再将烧结后的陶瓷进行外圆加工和端面抛光，刷上银层；
其制造方法是：
①先将粉末状的二氧化钡、二氧化钛、氧化锌、五氧化二铌以及微量掺杂添加物按组分要求配料，放入球磨机的料筒中搅拌球磨10-12小时；
②将搅拌球磨的料浆干燥造粒：加入粉体重量的20%PVA水溶液搅拌均匀后进行喷雾造粒；
③干压成型，压制成型的成型压力700-1600MPa，并且装钵；
④在1240-1280℃下保温2～4小时，排胶烧结一次完成即制得TM模通信用陶瓷介质谐振器；
⑤将烧结后的陶瓷进行外圆加工和端面抛光，刷上银层。
本发明采用氧化物与添加剂混合固相反应法制备的BaTiO3，BaTi4O9及ZnNb2O6的微晶体，并添加微量掺杂添加物制得的晶粒细小均匀、气孔率低和性能优良的微波介质陶瓷。在各添加剂的添加范围内都可以获得很好的微波特性。且国内原料成本低，可进一步加强和国外微波陶瓷的竞争力，加速国产微波陶瓷的大量应用。
与现有技术相比，本发明具有以下特点：
1）本发明的配方组成不含有铅、铬、汞等重金属成分，即本发明提供的是一种环保微波介质陶瓷。符合绿色环保的无污染要求。且符合欧共体最新出台的无铅标准和废旧电器回收标注的RHOS和WEEE的严格标准要求。可以在高频领域产品中应用；能够将产品进行出口到世界的任何国家；
2）由传统的煅烧二步工艺优化成一步法工艺（省去煅烧工序）大大降低制造成本。该方法工艺简单，易于工业自动化生产，且材料性能稳定；
3）由传统的烧结工艺1300-1500℃，降到1280℃以下，烧结温度的进一步降低，更具有节能的更大优势；
4）性能上有较大提升：传统技术配方在L波段的介电常数45-65，Q值只有3000-4000，谐振频率温度系数大于±10PPm以上，本发明的材料配方在L波段的介电常数35-45，Q值高达5000以上，谐振频率温度系数小于±2PPm以内；
5）本发明可作为L波段用环保微波用通信谐振器、滤波器和振荡器等电子元器件的关键核心材料使用，而广泛应用于移动通信、卫星通信、全球卫星定位***（GPS）、蓝牙技术以及无线局域网（WLA）等现代通信行业，具有重要工业应用价值。
附图说明
图1为温度与谐振频率关系特性趋势图。
图2为谐振频率与品质因数图。
。
具体实施方式
下面结合附图用具体实施方式详细描述本发明：
L波段用环保型微波介质陶瓷，制造原料中含有成分：氧化钡（BaO）二氧化钛（ TiO2），氧化锌（ ZnO）和五氧化二铌（Nb2O5）以及微量掺杂添加物组分；其特征是:所述微量添加物中还含有氧化锰(MnO)、氧化铜(CuO)微量添加物的配比以及制造方法，表1给出各实施例的数据，表2给出各实施例的性能。
表1：
表2：TM模各规格谐振器的主要性能
图1～2总结出配方和性能的变化趋势，可以方便调整配方，获得所需要性能的微波介质陶瓷。
图1中的温度与谐振频率偏移关系特性趋势图表示谐振频率在-40℃～+90℃间变化，谐振频率为1.850GHZ的介质频率偏在0.5MHZ以内（Tf＜ 3ppm/℃）,频率稳定特性很好。上面的Tf表示谐振频率温度系数：△f表示谐振频偏；T表示温度。
图2中的品质因数Q值与烧结温度的关系曲线图,说明最佳的烧结温度在1280℃左右，且又有较宽的烧结温度范围。且该介质陶瓷适合低温烧结，烧结温度不宜太高。

Claims (1)

1.一种TM模通信用陶瓷介质谐振器制备工艺，制造原料中含有：氧化钡，二氧化钛，氧化锌和五氧化二铌以及微量掺杂添加物组分；其特征是:所述微量掺杂添加物是氧化锰、氧化铜组分，各组分的含量的重量百分比为：
氧化钡 40%～50%； 二氧化钛 40%～46%；
氧化锌 4%～10%； 五氧化二铌5%～10 %；
微量添加物 氧化锰 0.3%～0.45 %；氧化铜 0.0%～0.3 %；
将上述组分经过配料、混合球磨、造粒、成型、装钵、排胶和烧结的固相反应工序烧制成微波介质陶瓷,再将烧结后的陶瓷进行外圆加工和端面抛光，刷上银层；
其制造方法是：
①先将粉末状的二氧化钡、二氧化钛、氧化锌、五氧化二铌以及微量掺杂添加物按组分要求配料，放入球磨机的料筒中搅拌球磨10-12小时；
②将搅拌球磨的料浆干燥造粒：加入粉体重量的20%PVA水溶液搅拌均匀后进行喷雾造粒；
③干压成型，压制成型的成型压力700-1600MPa，并且装钵；
④在1240-1280℃下保温2～4小时，排胶烧结一次完成即制得TM模通信用陶瓷介质谐振器；
⑤将烧结后的陶瓷进行外圆加工和端面抛光，刷上银层。
CN201710003314.0A 2017-01-04 2017-01-04 Tm模通信用陶瓷介质谐振器制备工艺 Pending CN107056278A (zh)

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