Targeting the application requirements of 5G/6G communications, millimeter-wave radars and integrated packaging for high-end electronic equipment, our research group adopts a multi-scale collaborative design strategy to develop low-temperature co-fired ceramic (LTCC) material systems with low relative permittivity (εᵣ), low dielectric loss (tanδ), high thermal conductivity and excellent thermal matching. This research addresses the inherent drawbacks of conventional high-frequency packaging materials, including high dielectric loss, severe thermal mismatch and insufficient integration capability.

Focusing on glass-ceramic multiphase composite technology, we systematically optimize preparation schemes such as glass network modification, grain boundary regulation and heterogeneous interface matching. Methods for precise control of phase transformation and interfacial bonding during low-temperature sintering are established. The high-frequency transmission performance and environmental adaptability of the materials are enhanced via multi-scale structural synergy. We also adopt a data-driven research approach and construct a theoretical model correlating composition, structure, dielectric properties and thermal properties. Combined with advanced characterization techniques including high-resolution electron microscopy, in-situ thermal analysis and broadband dielectric measurement, the regulation mechanisms of glass network polymerization degree and crystalline phase distribution on dielectric response and thermal transport are elucidated at the atomic and microscopic levels.

Building on fundamental research findings, we further advance the engineering development of microwave devices. By integrating the optimized LTCC substrate materials with precision tape casting, multilayer alignment and co-firing technologies, a variety of products have been developed, such as high-frequency filters, millimeter-wave antenna arrays and radio frequency (RF) front-end modules. A full-process performance regulation strategy covering molecular structure design of materials, controllable powder preparation and co-firing integration of multilayer devices is formulated. A series of LTCC materials and components featuring low loss, high thermal conductivity, high integration and high reliability have been successfully fabricated. The relevant achievements provide critical theoretical support and engineering references for the domestic industrialization of high-performance packaging materials applied in 5G/6G communications, satellite navigation and high-end electronic equipment.

Publications:

1、Chang-Hao Wang, Kai-Heng Zhang, Jian Bao, Jia-Pei Jiang, Di-Ming Xu, Chao Du, Li-Xia Pang*, Tao Zhou*, Kar Ban Tan*, Di Zhou*, Novel Temperature-Stable (1-x)Ba3V2P3O15-xBaV2O6 Composite Ceramics with Ultralow Sintering Temperature and Low Dielectric Loss for Dielectric Resonator Antenna Applications, Advanced Functional Materials, 2026, 36[18], e22167.

2、Wei Wang, Xin Wang, Jian Bao, Jiapei Jiang, Zhen Fang, Biaobing Jin, Zhongqi Shi, Moustafa Adel Darwish, Yawei Chen, Qixin Liang, Meirong Zhang, Diming Xu, Chao Du, Di Zhou*, Low-permittivity BaCuSi4O10-based dielectric Ceramics: An available solution to connect low temperature cofired ceramic technology and millimeter-wave communications, Chemical Engineering Journal, 2024, 494, 153172.

3、Chang-Hao Wang, Kai-Heng Zhang, Wei Wang, Jian Bao, Jia-Pei Jiang, Ke-Hong Zhou, Jun Li, Chao Liang, Da-Wei Liu, Moustafa Adel Darwish, Tao Zhou, Di-Ming Xu, Song Xia, Kar Ban Tan, and Di Zhou*, A comprehensive study on low temperature sintering and microwave/terahertz dielectric properties of BaO-P2O5 binary ceramics, Journal of Materials Chemistry C, 2025, 13, 14843-14855.

4、Yu, Zhenfa; Wang, Chang-Hao; Wang, Xin; He, Guoqiang; Ma, Peiwen; Bao, Jian; Fang, Zhen; Xu, Diming; Pang, Li-Xia*; Zhou, Tao; Tan, Kar Ban; Zhou, Di*, Low-Temperature Sintered Ba16ZrNb12O48-BaWO4 Composite Ceramics with Near-Zero τf and Enhanced Q×f for LTCC Applications, Journal of the European Ceramic Society, 2026,46, 118054.

5、Pei-Wen Ma, Chang-Hao Wang, Zhen-Fa Yu, Rui Zou, Tao Zhou,* Kar Ban Tan,* Di Zhou*, A Novel Low Permittivity CaP2O6 Microwave Dielectric Ceramics with Low Sintering Temperature by B2O3-CuO Additions, Journal of the European Ceramic Society, 2026,46, 118210.