Shimeng Zhang , Zeyu He , Zhiguo Wang, Zhenggang Rao, Yunlong Hu, Chunchun Li, Longlong Shu
{"title":"新型低介电常数透闪石陶瓷 CaZnGe2O6 的晶体结构、微波介电性能和远红外光谱分析","authors":"Shimeng Zhang , Zeyu He , Zhiguo Wang, Zhenggang Rao, Yunlong Hu, Chunchun Li, Longlong Shu","doi":"10.1016/j.ceramint.2024.10.131","DOIUrl":null,"url":null,"abstract":"<div><div>The diopside-structured CaZnGe<sub>2</sub>O<sub>6</sub> ceramics were synthesized using the conventional solid-state reaction method in this study, and their crystal structure, microstructural evolution, and microwave dielectric properties were systematically investigated. The XRD and Rietveld refinement analyses confirmed that CaZnGe<sub>2</sub>O<sub>6</sub> crystallizes in the monoclinic crystal system with a <em>C</em>2/<em>c</em> space group. The intrinsic microwave dielectric properties of the ceramics were evaluated using far-infrared spectroscopy. The ceramic structure exhibits high density and microstructural homogeneity after sintering at 1130 °C, resulting in exceptional microwave dielectric properties achieved at this optimal temperature (<em>ε</em><sub><em>r</em></sub> = 8.78 <em>Q×f</em> = 63,782 GHz, <em>τ</em><sub><em>f</em></sub> = −66.4 ppm/°C). These findings highlight the potential application of CaZnGe<sub>2</sub>O<sub>6</sub> ceramics as low-permittivity materials suitable for microwave devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 24","pages":"Pages 52780-52787"},"PeriodicalIF":5.1000,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Crystal structure, microwave dielectric properties, and far-infrared spectroscopy of a novel low-dielectric constant tremolite ceramic CaZnGe2O6\",\"authors\":\"Shimeng Zhang , Zeyu He , Zhiguo Wang, Zhenggang Rao, Yunlong Hu, Chunchun Li, Longlong Shu\",\"doi\":\"10.1016/j.ceramint.2024.10.131\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The diopside-structured CaZnGe<sub>2</sub>O<sub>6</sub> ceramics were synthesized using the conventional solid-state reaction method in this study, and their crystal structure, microstructural evolution, and microwave dielectric properties were systematically investigated. The XRD and Rietveld refinement analyses confirmed that CaZnGe<sub>2</sub>O<sub>6</sub> crystallizes in the monoclinic crystal system with a <em>C</em>2/<em>c</em> space group. The intrinsic microwave dielectric properties of the ceramics were evaluated using far-infrared spectroscopy. The ceramic structure exhibits high density and microstructural homogeneity after sintering at 1130 °C, resulting in exceptional microwave dielectric properties achieved at this optimal temperature (<em>ε</em><sub><em>r</em></sub> = 8.78 <em>Q×f</em> = 63,782 GHz, <em>τ</em><sub><em>f</em></sub> = −66.4 ppm/°C). These findings highlight the potential application of CaZnGe<sub>2</sub>O<sub>6</sub> ceramics as low-permittivity materials suitable for microwave devices.</div></div>\",\"PeriodicalId\":267,\"journal\":{\"name\":\"Ceramics International\",\"volume\":\"50 24\",\"pages\":\"Pages 52780-52787\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-12-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramics International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0272884224046431\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224046431","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Crystal structure, microwave dielectric properties, and far-infrared spectroscopy of a novel low-dielectric constant tremolite ceramic CaZnGe2O6
The diopside-structured CaZnGe2O6 ceramics were synthesized using the conventional solid-state reaction method in this study, and their crystal structure, microstructural evolution, and microwave dielectric properties were systematically investigated. The XRD and Rietveld refinement analyses confirmed that CaZnGe2O6 crystallizes in the monoclinic crystal system with a C2/c space group. The intrinsic microwave dielectric properties of the ceramics were evaluated using far-infrared spectroscopy. The ceramic structure exhibits high density and microstructural homogeneity after sintering at 1130 °C, resulting in exceptional microwave dielectric properties achieved at this optimal temperature (εr = 8.78 Q×f = 63,782 GHz, τf = −66.4 ppm/°C). These findings highlight the potential application of CaZnGe2O6 ceramics as low-permittivity materials suitable for microwave devices.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.