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Rattling Effect in A Site and Microwave Dielectric Properties of Ca3-xMgxYb2Ge3O12 (0≤x≤3) Garnets
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Ying TANG1, 2, Huaicheng XIANG1, 2, Jie LI1, Liang FANG1
Journal of the Chinese Ceramic Society | 2023, 51(4) : 872 - 881
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Journal of the Chinese Ceramic Society | 2023, 51(4): 872-881
• Research Articles •
Rattling Effect in A Site and Microwave Dielectric Properties of Ca3-xMgxYb2Ge3O12 (0≤x≤3) Garnets
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Ying TANG1, 2, Huaicheng XIANG1, 2, Jie LI1, Liang FANG1
Affiliations
  • 1.Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
  • 2.College of Science, Guilin University of Technology, Guilin 541004, Guangxi, China

    • TANG Ying (1988-), female, Ph.D., Associate Professor. E-mail:

About Author:

TANG Ying (1988-), female, Ph.D., Associate Professor. E-mail:

Published: 2023-04-20 doi: 10.14062/j.issn.0454-5648.20220702
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Microwave dielectric ceramics are the key basic materials of 5G/6G communication technology, and the materials with a high quality factor (Q×f), a low dielectric constant (εr) and a near-zero temperature coefficient of resonant frequency (τf) become a focus of research and development. In this paper, a series of garnet Ca3-xMgxYb2Ge3O12 (0≤x≤3) ceramics were prepared by a solid-state reaction approach, and the influence of Mg2+ "rattling" effects in the A-site on the microwave dielectric properties was investigated. The ceramics with 0≤x≤2 exhibit a normal garnet structure, εr gradually increases from 10.3 to 11.8, whereas the Q×f gradually decreases from 98 000 GHz to 78 000 GHz, and τf is in the range from -40×10-6 to -56×10-6/℃. The ceramics with 2<x≤3 have an inverse garnet structure with Mg2+ in the A-site and εr quickly increases to 13.5, whereas the Q×f apparently decreases to 19, 800 GHz, and the τf value varies from the negative value to the positive value (+70.5×10-6/℃), which are attributed to the rattling effect Mg2+ and the mismatch between Mg2+ and Yb3+ in the A-site. According to the extrapolated values of the far-infrared reflective spectrum in the microwave region, the intrinsic εr and Q×f values are in a reasonable agreement with the measured values.

microwave dielectric ceramics  /  Rattling effect  /  garnet  /  dielectric properties
唐莹, 相怀成, 李洁, 方亮. Ca3-xMgxYb2Ge3O12 (0≤x≤3)石榴石的A位Rattling效应与微波介电性能. 硅酸盐学报, 2023 , 51 (4) : 872 -881 . DOI: 10.14062/j.issn.0454-5648.20220702
Ying TANG, Huaicheng XIANG, Jie LI, Liang FANG. Rattling Effect in A Site and Microwave Dielectric Properties of Ca3-xMgxYb2Ge3O12 (0≤x≤3) Garnets[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (4) : 872 -881 . DOI: 10.14062/j.issn.0454-5648.20220702
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Year 2023 volume 51 Issue 4
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Article Info
doi: 10.14062/j.issn.0454-5648.20220702
  • Receive Date：2022-08-29
  • Online Date：2026-10-20
  • Published：2023-04-20
Article Data
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History
  • Received：2022-08-29
  • Revised：2022-10-05
Funding
Affiliations
    1.Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
    2.College of Science, Guilin University of Technology, Guilin 541004, Guangxi, China

Corresponding:

FANG Liang (1970-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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