A5021266968- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Advanced ceramic materials synthesis
- Acoustic Wave Resonator Technologies
- Face recognition and analysis
- Face and Expression Recognition
- Dielectric properties of ceramics
- Advanced Image and Video Retrieval Techniques
- Multiferroics and related materials
- Advanced Antenna and Metasurface Technologies
- Advanced Image Processing Techniques
- Electrospun Nanofibers in Biomedical Applications
- Mechanical and Optical Resonators
- Electromagnetic wave absorption materials
- Nuclear materials and radiation effects
- Cultural Heritage Materials Analysis
- Biometric Identification and Security
- Millimeter-Wave Propagation and Modeling
- Image and Signal Denoising Methods
- Recommender Systems and Techniques
- Laser Material Processing Techniques
- Advanced optical system design
- Dielectric materials and actuators
- Advanced Wireless Communication Technologies
- Advanced Vision and Imaging
Tsinghua University
2019-2025
State Key Laboratory of New Ceramics and Fine Processing
2019-2025
Institute of Information Engineering
2024-2025
Chinese Academy of Sciences
2025
Beijing Institute of Technology
2024
University of Chinese Academy of Sciences
2024
National University of Singapore
2021
Abstract Low-loss tungsten-bronze microwave dielectric ceramics are materials with potential application value for miniaturized filters and antennas in the fifth-generation (5G) communication technology. In this work, a novel Al/Nd co-doping method of Ba 4 Nd 9.33 Ti 18 O 54 (BNT) chemical formula 9.33+ z /3 18− Al (BNT-AN, 0 ⩽ 2) was proposed to improve properties through structural defect modulation. Together Al-doped (Ba , BNT-A, comparison, were prepared by solid state method. It is...
Journal of Advanced DielectricsAccepted Papers Open AccessUnveiling the Secrets Song Dynasty Qingbai Porcelain: Colouring Mechanism and Non-Destructive Terahertz TestingZeqian Li, Xiaohua Zhang, Jie Weijia Guo, Zhenxing YueZeqian Zhanghttps://orcid.org/0000-0002-6940-8915 Search for more papers by this author , Zhang Guo Yue https://doi.org/10.1142/S2010135X25500092Cited by:0 (Source: Crossref) PreviousNext AboutFiguresReferencesRelatedDetailsPDF/EPUB ToolsAdd to favoritesDownload...
Abstract Ba 4 (Sm 0.15 Nd 0.85 ) 9.33 Ti 18‐ z Al 3 /4 O 54 (BSNT‐ Al, 0.0 ≤ 2.5) ceramics were prepared via a solid‐state reaction, and the effects of doping on microwave dielectric properties defect behavior title compound studied. X‐ray diffraction (XRD) analysis scanning electron microscopy (SEM) photographs suggested that ions successfully entered lattice to form tungsten‐bronze‐like solid solutions. With small amount substitution, relative constant (ε r ), temperature coefficient...
Abstract Microwave communication systems are being developed with the goal to achieve miniaturization and high reliability. There urgent requirements for microwave dielectric materials exhibit low sintering temperatures, excellent properties, prominent mechanical performance. However, simultaneously achieving these is a significant challenge. These concerns have been addressed in uniform ultrafine‐grained 0.95MgTiO 3 –0.05CaTiO ceramics an average grain size of ~0.6 µm via engineering...
Tetragonal tungsten bronze (TTB)-structured ceramics exhibit extraordinary and fascinating dielectric properties due to their unique structural characteristics abundant compositional tunability. The ferroelectric are affected by commensurate or incommensurate modulated structures. Herein, the antiferroelectric-relaxor (AFE-RFE) transition in K2- xNaxPrNb5O15 with a TTB structure is successfully achieved constructing structures, which attributed cation disorder lattice distortion arising from...
Abstract Microwave and terahertz communications are increasingly significant, however, the lack of material information in band limits their development. Moreover, few lightweight materials with a high relative dielectric constant ( ) found suited for satellite communication wearable devices. In this study, we developed porous Ba 4 [(Sm 0.1 Nd 0.9 Bi ] 28/3 Ti 18 O 54 (BSNBT) ceramics exhibiting total porosity ranging from 6.3% to 26.5% (bulk density 5.47 4.29 g/cm 3 relatively 85.6 56.8,...
Masked face recognition is important for social good but challenged by diverse occlusions that cause insufficient or inaccurate representations. In this work, we propose a unified deep network to learn generative-to-discriminative representations facilitating masked recognition. To end, split the into three modules and them on synthetic faces in greedy module-wise pretraining manner. First, leverage generative encoder pretrained inpainting finetune it represent category-aware descriptors....
Abstract Sixth generation (6G) wireless networks operating in terahertz frequency region are significant solutions to the increasing number of telecommunication devices and demand for faster data transmission. However, few dielectric materials exhibiting an ultralow relative constant (ε r ), loss tangent (tan δ high mechanical strength found suited 6G telecommunication. In this study, we developed lightweight ceramic foams by directly sintering glass hollow spheres. The effects temperatures...