Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
Fei Liu, Hanwei He, Lijin Cheng, Hao Li, Haizhou Bian, Shaojun Liu
Summary: The dielectric properties of microwave ceramics manufactured via additive manufacturing (AM) are lower than those of dry-pressed ones due to the special laminated manufacturing method. A study using the vat photopolymerization technique found that increasing the layer thickness of Mg2TiO4 ceramics from 20 to 50 mu m resulted in a decrease in the number of pore defects along the laminated interface. This led to a denser microstructure and fully grown grains, contributing to an increase in the quality factor values.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Electrical & Electronic
Rahimah Mustapa Zahari, Abdul Halim Shaari, Zulkifly Abbas, Ismayadi Ismail, Hussein Baqiah, Lim Kean Pah, Chen Soo Kien, Mohd Mustafa Awang Kechik
Summary: Synthesized BiFe1-xYxO3 ceramics with different Y concentrations showed structural phase transformations and enhanced magnetic properties. The highest microwave absorption properties were observed at x = 0.0.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Lanfang Ding, Minqing Song, Hongtao Ma
Summary: Novel temperature-stable Mg2TiO4-based ceramics with improved sintering ability and temperature stability were successfully fabricated using a solid-state reaction method. The addition of Ba3(VO4)2 and LiF enabled the formation of well-dense Mg2TiO4-Ba3(VO4)2 composite ceramics at 900 degrees C through LiF liquid-phase sintering. The resulting ceramics exhibited balanced microwave dielectric properties and good chemical compatibility with Ag electrodes, making them suitable as substrate materials for LTCC applications.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Sen He, Kangguo Wang, Xianjie Zhou, Sang Hu, Xiaowen Luan, Shicheng Zhou, Xi Wang, Xiuli Chen, Huanfu Zhou
Summary: In this study, a high-quality CSAT ceramic was prepared using the RS method, and its phase structure, surface morphology, packing fraction, and valence bond were systematically investigated. The ceramic exhibited exceptional microwave dielectric properties with a relative dielectric constant of 17.5, quality factor of 66700 GHz, and temperature coefficient of resonant frequency of -6.93 ppm/°C, highlighting the excellent suitability of the RS method for preparing CSAT ceramics.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Min Yang, Yan Gao, Yong Zheng, Xuepeng Lu, Huimin Yang, Xiangyu Xu, Peng Wu
Summary: Ca1-xBaxMgSi2O6 ceramics were prepared through solid-state reaction sintering, and the effects of substituting Ba2+ for Ca2+, relative density, phase composition, crystal morphology, and microwave dielectric properties were studied. The results showed that a single phase was formed when x ≤ 0.2, while a second phase appeared at x = 0.4. The increase in Ba2+ substitution affected the microwave dielectric properties, with Qxf value first increasing and then decreasing, and epsilon(r) value continuously increasing. The z(f) value also slightly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xiao-Qiang Song, Chang-Zhi Yin, Zheng-Yu Zou, Jia-Qing Yang, Fang-Fang Zeng, Jia-Min Wu, Yu-Sheng Shi, Wen-Zhong Lu, Wen Lei
Summary: (1 - x)CaTiO3-xLa(Mg2/3Nb1/3)O-3 solid solutions were prepared by a solid-state reaction method. A phase transition was observed when x increased from 0.5 to 0.6. New parameters were defined to explain the structure-property relationships of the materials based on the research results.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Xizhi Yang, Yuanming Lai, Yiming Zeng, Fan Yang, Fangyi Huang, Baoyang Li, Fanshuo Wang, Chongsheng Wu, Hua Su
Summary: The research investigated the effect of Mg2TiO4 content on the phase compositions, microstructures, and microwave dielectric properties of MgAl2O4 ceramics. It was found that Mg2TiO4 content had a significant impact on the grain size and dielectric constant of the ceramics, with both increasing as the Mg2TiO4 content increased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Chang Liu, Cheng Liu, Kui Liu, Dainan Zhang, Huaiwu Zhang
Summary: The study demonstrates the promising microwave dielectric properties of Ca-modified ZnTiTa2O8 ceramics, indicating their potential applications in miniaturized microwave devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Qin Zhang, Liangliang Xu, Xiaoli Tang, Huaiwu Zhang, Yingtang Zhou, Yulan Jing, Yuanxun Li, Yanan Liu, Hua Su
Summary: This study reports on the improvement of microwave dielectric properties and sintering characteristics of Zn1_xBixVxW1_xO4(x = 0-0.15)-based ceramics. Doping in an appropriate amount reduces the sintering temperature and enhances the microstructure densification and Qxf value. Structural parameters related to dielectric properties were systematically investigated, and the chemical bond characteristics were considered.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Xin Qu, Sen He, Qing Li, Shan Deng, Yaqi Xiao, Kaiyang Liu, Xiuli Chen, Jun Liang, Huanfu Zhou
Summary: Ca1.15RE0.85Al0.85Ti0.15O4 (RE = Nd, La, Y) ceramics were prepared by reaction sintering method. The sintering behavior, phase composition, microstructure, and microwave dielectric performances were investigated. It was found that CNAT and CYAT ceramics sintered at 1500°C exhibited the best microwave dielectric properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Bijaylaxmi Biswal, Dilip Kumar Mishra
Summary: Polycrystalline ceramic specimens of three different alumino-silicate solid solutions have been successfully synthesized by thermal plasma sintering technique. The ceramics consist of mullite and sillimanite phases, and exhibit high density and homogeneous grain distribution. These materials have high dielectric constant and low dissipation factor, with conductivity increasing with temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Kang Du, Changzhi Yin, Zhengyu Zou, Mingfei Cheng, Yiyang Cai, Jiaqing Yang, Meng Zhang, Wenzhong Lu, Shengxiang Wang, Wen Lei
Summary: Novel BaCa2M3O9 (M = Si, Ge) microwave dielectric ceramics were prepared via solid-state reaction and sintering, exhibiting triclinic structure and good microwave dielectric properties. Single-phase BaCa2Ge3O9 ceramic was synthesized for the first time and confirmed through Rietveld refinement and high-resolution transmission electron microscopy/selected area electron diffraction. The BaCa2M3O9 (M = Si, Ge) ceramics showed their microwave dielectric properties were influenced by factors such as relative density, ionic polarizability, relative covalence, and bond energy of M-O bond.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Kui Liu, Dainan Zhang, Yuran Yang, Qisheng Yin, Yida Lei, Cheng Liu, Jie Li, Lichuan Jin, Yulong Liao, Huaiwu Zhang
Summary: The sintering behavior, structural evolution, microstructure, and dielectric properties of Li2+xMgTiO4Fx (0 < x < 5) ceramics were investigated. The results showed the formation of a continuous solid solution and a composite ceramic with LiF. The Li2.75MgTiO4F0.75 exhibited the best dielectric properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Pengcheng Zhang, Hao Li, Xiaoqing Chen, Rui Xiang, Houlin Hu, Canbing Li
Summary: The influence of rare-earth ion substitution for B-site on Ba4RENb3O12 ceramics was investigated, revealing that the optimal microwave dielectric properties were obtained at 1425℃ for 6 hours. XRD and Rietveld refinement analysis provided insights into the phase composition and structural characteristics of Ba4RENb3O12 ceramics.
CERAMICS INTERNATIONAL
(2021)
