CN111943664A - 一种低烧结温度钡钐钛系微波介质陶瓷及其制备方法 - Google Patents

一种低烧结温度钡钐钛系微波介质陶瓷及其制备方法 Download PDF

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CN111943664A
CN111943664A CN202010742707.5A CN202010742707A CN111943664A CN 111943664 A CN111943664 A CN 111943664A CN 202010742707 A CN202010742707 A CN 202010742707A CN 111943664 A CN111943664 A CN 111943664A
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吉岸
王晓慧
金镇龙
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WUXI XINSHENG HUILONG NANO CERAMIC TECHNOLOGY CO LTD
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Abstract

本发明是低烧结温度钡钐钛系微波介质陶瓷及制备方法,包含摩尔比配比表达式为:Ba7Sm8Ti30O79‑aV2O5‑b0.5CuO‑0.5B2O3的原料,其中1%≤a≤2%,0.5%≤b≤1%。本发明的优点:配比及制备方法设计合理,采用0.5CuO‑0.5B2O3以及V2O5两种材料作为助烧剂,可有效降低烧结温度、增加陶瓷烧结的致密性、减少缺陷,并在一定程度上调节材料的谐振频率温度系数;Q×f值达到14457~30500GHz,谐振频率温度系数达到2.536~4.355ppm/℃。该陶瓷体系微波介电性能优异,原料无毒且价格低廉,制备工艺简单,具有广泛的应用前景。

Description

一种低烧结温度钡钐钛系微波介质陶瓷及其制备方法
技术领域
本发明涉及的是一种低烧结温度钡钐钛系微波介质陶瓷及制备方法,属于电子陶瓷技术领域。
背景技术
随着近几十年来的发展,微波介质陶瓷已成为一种新型的功能陶瓷材料,在微波频段电路中作为介质材料完成一种或多种功能。微波介电性能是微波介质陶瓷应用的决定因素,而相对介电常数εr、品质因数Q×f 和谐振频率温度系数τf是微波介电性能的三个主要参数。
随着5G移动通信系统产业的快速发展,作为通信设备中的重要器件, 微波元器件特别是滤波器、谐振器受到研发人员的广泛关注。为了进一步提升微波元器件的性能、缩小微波元器件的尺寸,以及降低制造成本, 对微波介电材料的要求主要有以下几点:(1)较高的介电常数εr;(2)尽可能高的品质因数Q×f;(3)近零的谐振频率温度系数τf;(4)所选材料价格便宜且无毒环保。从介电常数的角度划分,高介电常数微波介质陶瓷通常是指介电常数在60及60以上的微波介电材料,主要材料体系通常包括钡钐钛体系、ABO3型钙钛矿结构体系、钙锂镧钛体系、铋基体系、锂基体系及铅基钙钛矿体系等。
目前在高介电常数微波介电材料体系中,关于钡钐钛体系的研究比较多,它属于类钙钛矿钨青铜结构,结构单元中具有形状各异、大小不一的几类空隙,能够填充不同价态、不同半径的离子,不同离子的填充会引起结构发生对应的变化,从而使钡钐钛体系微波介电材料具备性能各异的微波介电性能。
对于Ba-Sm2O3-TiO2体系陶瓷烧结温度通常大于1360℃,而且损耗较大,这些阻碍了它的大规模实际应用。所以,如何改善其烧结性能和微波介电性能,是本发明所要解决的技术问题。
发明内容
本发明提出的是一种低烧结温度钡钐钛系微波介质陶瓷及制备方法,其目的旨在克服现有技术存在的上述不足,采用优选的助烧剂,以降低烧结温度、增加陶瓷烧结的致密性、减少缺陷,并在一定程度上调节材料的谐振频率温度系数。
本发明的技术解决方案:一种低烧结温度钡钐钛系微波介质陶瓷,包含摩尔比配比表达式为:Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的原料,其中1%≤a≤2%,0.5%≤b≤1%。
一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,包括以下工艺步骤:
1)先将BaCO3、Sm2O3、TiO2按照化学式Ba7Sm8Ti30O79配料,混合后充分球磨,球磨后烘干、过筛放入刚玉坩埚中,然后保温预烧,得到粉料样品A;
2)将CuO、B2O3按摩尔比1:1配制0.5CuO-0.5B2O3,混合后充分球磨,球磨后烘干、过筛,得到粉料样品B;
3)将上述步骤1)和2)中的样品A、样品B与V2O5混合配料,样品 A、样品B和V2O5按照表达式Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的摩尔比配料,其中1%≤a≤2%,0.5%≤b≤1%,然后充分球磨,球磨后烘干、造粒、过筛;
4)将步骤3)过筛后的颗粒压制成圆柱体,然后烧结成瓷,即得低烧结温度钡钐钛系微波介质陶瓷。
优选的,所述的步骤1)中保温预烧1100~1180℃、3~5h。
优选的,所述的步骤4)中圆柱体的直径10mm、高度6mm。
优选的,所述的步骤4)中烧结900~1350℃、4h。
本发明的优点:配比及制备方法设计合理,采用0.5CuO-0.5B2O3以及 V2O5两种材料作为助烧剂,可有效降低烧结温度、增加陶瓷烧结的致密性、减少缺陷,并在一定程度上调节材料的谐振频率温度系数;Q×f值达到 14457~30500GHz,谐振频率温度系数达到2.536~4.355ppm/℃。该陶瓷体系微波介电性能优异,原料无毒且价格低廉,制备工艺简单,具有广泛的应用前景。
具体实施方式
下面结合实施例和具体实施方式对本发明作进一步详细的说明。
一种低烧结温度钡钐钛系微波介质陶瓷,包含摩尔比配比表达式为:Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的原料,其中1%≤a≤2%,0.5%≤b≤ 1%。
低烧结温度钡钐钛系微波介质陶瓷的制备方法,包括以下工艺步骤:
1)先将BaCO3、Sm2O3、TiO2按照化学式Ba7Sm8Ti30O79配料,混合后充分球磨,球磨后烘干、过筛放入刚玉坩埚中,然后在1100~1180℃下保温预烧3~5h,得到粉料样品A;
2)将CuO、B2O3按摩尔比1:1配制0.5CuO-0.5B2O3,混合后充分球磨,球磨后烘干、过筛,得到粉料样品B;
3)将上述步骤1)和2)中的样品A、样品B与V2O5混合配料,样品 A、样品B和V2O5按照表达式Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的摩尔比配料,其中1%≤a≤2%,0.5%≤b≤1%,然后充分球磨,球磨后烘干、造粒、过筛;
4)将步骤3)过筛后的颗粒压制成直径10mm、高度6mm的圆柱体,然后在900~1350℃下烧结4h成瓷,即可得低烧结温度钡钐钛系微波介质陶瓷。
实施例
设置不含有0.5CuO-0.5B2O3及V2O5的对比例,以及含有不同浓度V2O5、或含有不同浓度V2O5和0.5CuO-0.5B2O3的12个实施例,分别测得其烧结温度、介电常数、品质因数和谐振频率温度系数。
Figure BDA0002607273050000031
Figure BDA0002607273050000041
最优配比值为实施例10~12,因为可以把烧结温度降低至1000°以下,并且温度系数也降低到3ppm以内。
以上所述的仅是本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。

Claims (7)

1.一种低烧结温度钡钐钛系微波介质陶瓷,其特征是包含摩尔比配比表达式为:Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的原料,其中1%≤a≤2%,0.5%≤b≤1%。
2.如权利要求1所述的一种低烧结温度钡钐钛系微波介质陶瓷,其特征是a=1.4%,0.8%≤b≤1%。
3.一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,其特征是包括以下工艺步骤:
1)先将BaCO3、Sm2O3、TiO2按照化学式Ba7Sm8Ti30O79配料,混合后充分球磨,球磨后烘干、过筛放入刚玉坩埚中,然后保温预烧,得到粉料样品A;
2)将CuO、B2O3按摩尔比1:1配制0.5CuO-0.5B2O3,混合后充分球磨,球磨后烘干、过筛,得到粉料样品B;
3)将上述步骤1)和2)中的样品A、样品B与V2O5混合配料,样品A、样品B和V2O5按照表达式Ba7Sm8Ti30O79-aV2O5-b0.5CuO-0.5B2O3的摩尔比配料,其中1%≤a≤2%,0.5%≤b≤1%,然后充分球磨,球磨后烘干、造粒、过筛;
4)将步骤3)过筛后的颗粒压制成圆柱体,然后烧结成瓷,即得低烧结温度钡钐钛系微波介质陶瓷。
4.如权利要求3所述的一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,其特征是所述的步骤1)中保温预烧1100~1180℃、3~5h。
5.如权利要求3所述的一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,其特征是所述的步骤4)中圆柱体的直径10mm、高度6mm。
6.如权利要求3所述的一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,其特征是所述的步骤4)中烧结900~1350℃、4h。
7.如权利要求3所述的一种低烧结温度钡钐钛系微波介质陶瓷的制备方法,其特征是所述的步骤3)中a=1.4%,0.8%≤b≤1%。
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CN113999005A (zh) * 2021-11-23 2022-02-01 无锡鑫圣慧龙纳米陶瓷技术有限公司 中介电常数低温共烧多层陶瓷电容器用介质陶瓷及制备方法
CN114133244A (zh) * 2021-12-20 2022-03-04 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数gps定位用微波介质陶瓷及其制备方法
CN114180956A (zh) * 2021-12-20 2022-03-15 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数5g波导用微波介质陶瓷及其制备方法和应用
CN114394828A (zh) * 2022-01-10 2022-04-26 湖南省美程陶瓷科技有限公司 一种中介电常数电子陶瓷材料及其制备方法

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CN103113105A (zh) * 2013-01-18 2013-05-22 电子科技大学 低温烧结的高介电常数微波介电陶瓷及制备方法
CN108821764A (zh) * 2018-08-22 2018-11-16 天津大学 一种谐振器用微波介质陶瓷及其制备方法
CN110092655A (zh) * 2019-06-06 2019-08-06 无锡鑫圣慧龙纳米陶瓷技术有限公司 一种钡钐钛系低损耗微波介质陶瓷及其制备方法

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CN113999005A (zh) * 2021-11-23 2022-02-01 无锡鑫圣慧龙纳米陶瓷技术有限公司 中介电常数低温共烧多层陶瓷电容器用介质陶瓷及制备方法
CN114133244A (zh) * 2021-12-20 2022-03-04 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数gps定位用微波介质陶瓷及其制备方法
CN114180956A (zh) * 2021-12-20 2022-03-15 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数5g波导用微波介质陶瓷及其制备方法和应用
CN114133244B (zh) * 2021-12-20 2022-10-18 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数gps定位用微波介质陶瓷及其制备方法
CN114180956B (zh) * 2021-12-20 2023-07-21 无锡鑫圣慧龙纳米陶瓷技术有限公司 高介电常数5g波导用微波介质陶瓷及其制备方法和应用
CN114394828A (zh) * 2022-01-10 2022-04-26 湖南省美程陶瓷科技有限公司 一种中介电常数电子陶瓷材料及其制备方法
CN114394828B (zh) * 2022-01-10 2022-10-18 湖南省美程陶瓷科技有限公司 一种中介电常数电子陶瓷材料及其制备方法

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