MnO2-CuO-TiO2共掺Al2O3陶瓷低温烧结和微波介电性能的研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (10): 3764-3768.

MnO₂-CuO-TiO₂共掺Al₂O₃陶瓷低温烧结和微波介电性能的研究

林聪毅¹, 陶宏磊², 李蔚²

1.上海三思电子工程有限公司,上海 201199;
2.华东理工大学材料科学与工程学院,上海 200237

收稿日期:2023-05-05 修订日期:2023-07-12 出版日期:2023-10-15 发布日期:2023-10-17
通信作者: 李蔚,教授。E-mail:liweiwei@ecust.edu.cn
作者简介:林聪毅(1984—),男,工程师。主要从事功能陶瓷等材料及应用方面的研究。E-mail:tyylcy@qq.com

Low Temperature Sintering and Microwave Dielectric Properties of MnO₂-CuO-TiO₂ Co-Doped Al₂O₃ Ceramics

LIN Congyi¹, TAO Honglei², LI Wei²

1. Shanghai Sansi Electronics Engineering Co., Ltd., Shanghai 201199, China;
2. School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2023-05-05 Revised:2023-07-12 Online:2023-10-15 Published:2023-10-17

摘要/Abstract

摘要： 作为重要微波介质材料之一,Al₂O₃陶瓷介电性能优良,在微波电路方面得到广泛应用。但Al₂O₃陶瓷的烧结温度较高,制备工序需消耗大量能源。低成本降低烧结温度对Al₂O₃陶瓷的进一步发展具有重要意义。本论文通过MnO₂-CuO-TiO₂掺杂实现了Al₂O₃陶瓷的低温烧结,并对其烧结行为和微波介电性能进行了研究。结果表明,MnO₂、CuO、TiO₂的质量分数分别为0.7%、0.5%、0.8%时,复合掺杂可以大幅降低Al₂O₃陶瓷的烧结温度,所获陶瓷具有良好的微波介电性能。在烧结温度为1 250 ℃时,Al₂O₃陶瓷的密度可达3.92 g/cm³,介电常数ε_r=10.02,品质因子与谐振频率的乘积Q×f值为51 239 GHz。Ti⁴⁺、Mn⁴⁺、Cu²⁺固溶导致Al₂O₃晶格扭曲活化,以及低共熔物形成是促进Al₂O₃陶瓷低温烧结的原因。

关键词: Al₂O₃陶瓷, MnO₂-CuO-TiO₂, 低温烧结, 微波介电性能, 掺杂

Abstract: Al₂O₃ ceramics is an important microwave dielectric material with excellent dielectric properties and is widely used in microwave circuits. However, its high sintering temperature leads to high energy consumption. Lowering the sintering temperature at a low cost is of great significance for the further development of Al₂O₃ ceramics. Low temperature sintering of Al₂O₃ ceramics was achieved by doping MnO₂-CuO-TiO₂, and its sintering behavior and microwave dielectric properties were studied. The results show that doping 0.7% (mass fraction) MnO₂, 0.5% (mass fraction) CuO and 0.8% (mass fraction) TiO₂ can greatly reduce the sintering temperature of Al₂O₃ ceramics, and the obtained ceramics have good microwave dielectric properties. When the sintering temperature is 1 250 ℃, the density of Al₂O₃ ceramics can reach 3.92 g/cm³, the dielectric constant ε_r is 10.02,and the quality factor Q×f resonant frequency value is 51 239 GHz. The lattice distorting activation of Al₂O₃ caused by the solid solution of Ti⁴⁺, Mn⁴⁺, Cu²⁺ and the formation of the low eutectic may be the reasons for promoting the low-temperature sintering of Al₂O₃ ceramics.

Key words: Al₂O₃ ceramics, MnO₂-CuO-TiO₂, low temperature sintering, microwave dielectric property, doping

中图分类号:

TQ174

林聪毅, 陶宏磊, 李蔚. MnO₂-CuO-TiO₂共掺Al₂O₃陶瓷低温烧结和微波介电性能的研究[J]. 硅酸盐通报, 2023, 42(10): 3764-3768.

LIN Congyi, TAO Honglei, LI Wei. Low Temperature Sintering and Microwave Dielectric Properties of MnO₂-CuO-TiO₂ Co-Doped Al₂O₃ Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3764-3768.

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MnO₂-CuO-TiO₂共掺Al₂O₃陶瓷低温烧结和微波介电性能的研究

Low Temperature Sintering and Microwave Dielectric Properties of MnO₂-CuO-TiO₂ Co-Doped Al₂O₃ Ceramics

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