Low-permittivity BaCuSi4O10-based dielectric Ceramics: An available solution to connect low temperature cofired ceramic technology and millimeter-wave communications

被引：15

作者：

Wang, Wei ^{[1
]}

Wang, Xin ^{[1
]}

Bao, Jian ^{[1
]}

Jiang, Jiapei ^{[1
]}

Fang, Zhen ^{[1
]}

Jin, Biaobing ^{[2
]}

Shi, Zhongqi ^{[3
]}

Darwish, Moustafa Adel ^{[4
]}

Chen, Yawei ^{[5
]}

Liang, Qixin ^{[5
]}

Zhang, Meirong ^{[5
]}

Xu, Diming ^{[1
]}

Du, Chao ^{[1
]}

Zhou, Di ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Key Lab Minist Educ & Int Ctr Dielect Res, Sch Elect Sci & Engn, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China

[2] Nanjing Univ, Res Inst Supercond Elect RISE, Sch Elect Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China

[3] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

[4] Tanta Univ, Fac Sci, Phys Dept, Al Geish St, Tanta 31527, Egypt

[5] Shenzhen Microgate Technol Co Ltd, Shenzhen 518118, Guangdong, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 494卷

基金：

中国国家自然科学基金;

关键词：

Low permittivity; Low temperature cofired ceramic; Microwave dielectric properties; Millimeter wave; Filter; MICROWAVE; GILLESPITE; CA; SR;

D O I：

10.1016/j.cej.2024.153172

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Low temperature cofired ceramic (LTCC) technology can serve for next-generation millimeter-wave electronic products to bring the advantages of integration, miniaturization and excellent high-frequency performance. However, challenges such as the performance of LTCC powders, quality of green tapes and Ag co-firing compatibility still need to be addressed for the application of LTCC technology. In this work, a systematic investigation from powder modification, LTCC process to filter design were carried out based on novel BaCuSi4O10-based dielectric ceramics. Multiple effects in terms of suitable sintering temperature (840 degree celsius suit for Ag co-firing), low-permittivity (epsilon(r) similar to 5.7) and good thermal stability (temperature coefficient of resonant frequency similar to - 27 ppm/degree celsius, thermal expansion coefficient similar to 3.9 ppm/degree celsius) were achieved by introducing Li-B-Si glass and LiF composite additive. The origin of dielectric response of this LTCC system were discussed using the FIR reflectivity spectrum and THz-TDS. After optimizing the tape casting process for the LTCC powder, green tapes with uniform thickness, smooth surface and no cracking were obtained. Furthermore, the bandpass and lowpass filters exhibited a high level of filtering performance own to excellent dielectric properties and low surface roughness of the LTCC. Consequently, the BaCuSi4O10-based dielectric ceramic is an attractive candidate as LTCC technology expands into millimeter-wave communications.

引用

页数：8