Enhanced temperature stability of Li3Mg2NbO6-based ceramics by using LTC composite additives

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Electroceramics Pub Date : 2024-10-10 DOI:10.1007/s10832-024-00368-8

Jingru Xie, Zhifen Fu, Qing Cheng, Chen Chen, Yubin She, Xiangyi Li

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Abstract

The need for microwave dielectric ceramics is steadily growing along with the rapid advancement of wireless communication technology. The preparation of Li₃Mg₂NbO₆-xwt% LiF-TiO₂-CaF₂ (LMN-LTC, x = 4, 6, 8, 10) ceramics was carried out using the solid-state reaction method. The two-phase structure of the LMN-LTC ceramics was shown by XRD investigation, with the main phase being LMN and the second phase Ca(TiO₃). Due to the influence of additive LTC, the microwave dielectric properties of the LMN ceramics, especially the temperature stability were successfully regulated to near zero. The LMN ceramic with the addition of 6wt% LTC sintered at 1050 °C for 6 h exhibits outstanding microwave dielectric properties: ε_r = 13.0, Q × f = 42,000 GHz, τ_f = 1.76 ppm/°C. It is shown that LMN-6wt% LTC ceramic is promising for wireless communication applications.

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LTC复合添加剂增强了li3mg2nbo6基陶瓷的温度稳定性

随着无线通信技术的飞速发展，对微波介质陶瓷的需求不断增长。采用固相反应法制备了Li3Mg2NbO6-xwt% LiF-TiO2-CaF2 （LMN-LTC, x = 4,6,8,10）陶瓷。XRD表征了LMN- ltc陶瓷的两相结构，主相为LMN，第二相为Ca（TiO3）。由于添加剂LTC的影响，LMN陶瓷的微波介电性能，特别是温度稳定性被成功地调节到接近零。添加6wt% LTC的LMN陶瓷在1050°C下烧结6 h，表现出优异的微波介电性能：εr = 13.0, Q × f = 42,000 GHz, τf = 1.76 ppm/°C。结果表明，LMN-6wt% LTC陶瓷在无线通信领域具有广阔的应用前景。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.