Yang Liu, Haiqing Deng, Xiuli Chen, Xu Li, Huanfu Zhou
{"title":"新型稀土基 NaSrRE(WO4)3（RE=铈、钕、钐）微波陶瓷的微观结构与介电特性之间的关系","authors":"Yang Liu, Haiqing Deng, Xiuli Chen, Xu Li, Huanfu Zhou","doi":"10.1016/j.ceramint.2024.09.265","DOIUrl":null,"url":null,"abstract":"<div><div>By adopting the solid-state reaction method, rare-earth-based NaSrRE (WO<sub>4</sub>)<sub>3</sub> (RE = Ce, Nd, Sm) ceramics were successfully synthesized. The investigation also focused on the relationship between the microstructure and microwave dielectric properties. X-ray diffraction (XRD) results indicated that NaSrRE (WO<sub>4</sub>)<sub>3</sub> ceramics exhibit a tetragonal scheelite structure with a space group of <em>I</em>4<sub>1</sub>/<em>a</em>. It was found that the incorporation of smaller rare earth ions leads to a reduction in cell volume. The NaSrCe(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1250 °C exhibited excellent dielectric properties with <em>ε</em><sub><em>r</em></sub> = 8.84, <em>Q×f</em> = 73128 GHz, <em>τ</em><sub><em>f</em></sub> = −47.17 ppm/°C, the NaSrNd(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1225 °C showed dielectric properties of <em>ε</em><sub><em>r</em></sub> = 9.14, <em>Q×f</em> = 47824 GHz, <em>τ</em><sub><em>f</em></sub> = −55.56 ppm/°C, and the NaSrSm(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1225 °C demonstrated excellent dielectric properties with <em>ε</em><sub><em>r</em></sub> = 9.31, <em>Q×f</em> = 69141 GHz, <em>τ</em><sub><em>f</em></sub> = −46.99 ppm/°C. In general, the incorporation of rare earth ions of varying sizes at the A site of the scheelite structure can enhance the dielectric properties of the ceramics to some extent.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49226-49234"},"PeriodicalIF":5.1000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Relationship between the micro-structure and dielectric properties of novel rare earth based NaSrRE(WO4)3(RE=Ce, Nd, Sm) microwave ceramics\",\"authors\":\"Yang Liu, Haiqing Deng, Xiuli Chen, Xu Li, Huanfu Zhou\",\"doi\":\"10.1016/j.ceramint.2024.09.265\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>By adopting the solid-state reaction method, rare-earth-based NaSrRE (WO<sub>4</sub>)<sub>3</sub> (RE = Ce, Nd, Sm) ceramics were successfully synthesized. The investigation also focused on the relationship between the microstructure and microwave dielectric properties. X-ray diffraction (XRD) results indicated that NaSrRE (WO<sub>4</sub>)<sub>3</sub> ceramics exhibit a tetragonal scheelite structure with a space group of <em>I</em>4<sub>1</sub>/<em>a</em>. It was found that the incorporation of smaller rare earth ions leads to a reduction in cell volume. The NaSrCe(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1250 °C exhibited excellent dielectric properties with <em>ε</em><sub><em>r</em></sub> = 8.84, <em>Q×f</em> = 73128 GHz, <em>τ</em><sub><em>f</em></sub> = −47.17 ppm/°C, the NaSrNd(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1225 °C showed dielectric properties of <em>ε</em><sub><em>r</em></sub> = 9.14, <em>Q×f</em> = 47824 GHz, <em>τ</em><sub><em>f</em></sub> = −55.56 ppm/°C, and the NaSrSm(WO<sub>4</sub>)<sub>3</sub> ceramics sintered at 1225 °C demonstrated excellent dielectric properties with <em>ε</em><sub><em>r</em></sub> = 9.31, <em>Q×f</em> = 69141 GHz, <em>τ</em><sub><em>f</em></sub> = −46.99 ppm/°C. In general, the incorporation of rare earth ions of varying sizes at the A site of the scheelite structure can enhance the dielectric properties of the ceramics to some extent.</div></div>\",\"PeriodicalId\":267,\"journal\":{\"name\":\"Ceramics International\",\"volume\":\"50 23\",\"pages\":\"Pages 49226-49234\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-09-19\",\"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/S0272884224042731\",\"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/S0272884224042731","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}
Relationship between the micro-structure and dielectric properties of novel rare earth based NaSrRE(WO4)3(RE=Ce, Nd, Sm) microwave ceramics
By adopting the solid-state reaction method, rare-earth-based NaSrRE (WO4)3 (RE = Ce, Nd, Sm) ceramics were successfully synthesized. The investigation also focused on the relationship between the microstructure and microwave dielectric properties. X-ray diffraction (XRD) results indicated that NaSrRE (WO4)3 ceramics exhibit a tetragonal scheelite structure with a space group of I41/a. It was found that the incorporation of smaller rare earth ions leads to a reduction in cell volume. The NaSrCe(WO4)3 ceramics sintered at 1250 °C exhibited excellent dielectric properties with εr = 8.84, Q×f = 73128 GHz, τf = −47.17 ppm/°C, the NaSrNd(WO4)3 ceramics sintered at 1225 °C showed dielectric properties of εr = 9.14, Q×f = 47824 GHz, τf = −55.56 ppm/°C, and the NaSrSm(WO4)3 ceramics sintered at 1225 °C demonstrated excellent dielectric properties with εr = 9.31, Q×f = 69141 GHz, τf = −46.99 ppm/°C. In general, the incorporation of rare earth ions of varying sizes at the A site of the scheelite structure can enhance the dielectric properties of the ceramics to some extent.
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.
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