Mengyao Wang , Yuan Nie , Ziqi Zhao , Enxiang Guan , Ruzhong Zuo , Huanfu Zhou , Fangyi Huang
{"title":"低介电常数白钨RSrCe(MoO4)3 (R=Na, K)陶瓷的结构特性、晶格振动及微波介电性能","authors":"Mengyao Wang , Yuan Nie , Ziqi Zhao , Enxiang Guan , Ruzhong Zuo , Huanfu Zhou , Fangyi Huang","doi":"10.1016/j.jallcom.2025.182142","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, novel low-permittivity NaSrCe(MoO<sub>4</sub>)<sub>3</sub> (NSCM) and KSrCe(MoO<sub>4</sub>)<sub>3</sub> (KSCM) microwave dielectric ceramics are successfully synthesized via the solid-state reaction method. Rietveld refinement results of XRD patterns show that NSCM and KSCM with a tetragonal scheelite structure (space group <em>I4</em><sub><em>1/a</em></sub>) are single-phase. The results of XPS fitting show that the Ce ions in NSCM and KSCM ceramics coexist in both + 3 and + 4 valence states. Laser confocal Raman spectroscopy is utilized to investigate the intrinsic dielectric properties of the two ceramics. The NSCM (875 ℃) and KSCM (850 ℃) samples exhibit superior-grade microwave dielectric properties: <em>ε</em><sub><em>r</em></sub> = 10.86, <em>Q × f =</em> 55844 GHz, <em>τ</em><sub><em>f</em></sub> = -53.89 ppm/℃, and <em>ε</em><sub><em>r</em></sub> = 9.28, <em>Q × f =</em> 70716 GHz, <em>τ</em><sub><em>f</em></sub> = -58.46 ppm/℃, indicating that these two ceramics are highly promising for application in the 6 G communication domain.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1037 ","pages":"Article 182142"},"PeriodicalIF":6.3000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Structural characteristics, lattice vibration and microwave dielectric properties of low-permittivity scheelite RSrCe(MoO4)3 (R=Na, K) ceramics with low sintering temperature\",\"authors\":\"Mengyao Wang , Yuan Nie , Ziqi Zhao , Enxiang Guan , Ruzhong Zuo , Huanfu Zhou , Fangyi Huang\",\"doi\":\"10.1016/j.jallcom.2025.182142\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, novel low-permittivity NaSrCe(MoO<sub>4</sub>)<sub>3</sub> (NSCM) and KSrCe(MoO<sub>4</sub>)<sub>3</sub> (KSCM) microwave dielectric ceramics are successfully synthesized via the solid-state reaction method. Rietveld refinement results of XRD patterns show that NSCM and KSCM with a tetragonal scheelite structure (space group <em>I4</em><sub><em>1/a</em></sub>) are single-phase. The results of XPS fitting show that the Ce ions in NSCM and KSCM ceramics coexist in both + 3 and + 4 valence states. Laser confocal Raman spectroscopy is utilized to investigate the intrinsic dielectric properties of the two ceramics. The NSCM (875 ℃) and KSCM (850 ℃) samples exhibit superior-grade microwave dielectric properties: <em>ε</em><sub><em>r</em></sub> = 10.86, <em>Q × f =</em> 55844 GHz, <em>τ</em><sub><em>f</em></sub> = -53.89 ppm/℃, and <em>ε</em><sub><em>r</em></sub> = 9.28, <em>Q × f =</em> 70716 GHz, <em>τ</em><sub><em>f</em></sub> = -58.46 ppm/℃, indicating that these two ceramics are highly promising for application in the 6 G communication domain.</div></div>\",\"PeriodicalId\":344,\"journal\":{\"name\":\"Journal of Alloys and Compounds\",\"volume\":\"1037 \",\"pages\":\"Article 182142\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Alloys and Compounds\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S092583882503703X\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092583882503703X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Structural characteristics, lattice vibration and microwave dielectric properties of low-permittivity scheelite RSrCe(MoO4)3 (R=Na, K) ceramics with low sintering temperature
In this study, novel low-permittivity NaSrCe(MoO4)3 (NSCM) and KSrCe(MoO4)3 (KSCM) microwave dielectric ceramics are successfully synthesized via the solid-state reaction method. Rietveld refinement results of XRD patterns show that NSCM and KSCM with a tetragonal scheelite structure (space group I41/a) are single-phase. The results of XPS fitting show that the Ce ions in NSCM and KSCM ceramics coexist in both + 3 and + 4 valence states. Laser confocal Raman spectroscopy is utilized to investigate the intrinsic dielectric properties of the two ceramics. The NSCM (875 ℃) and KSCM (850 ℃) samples exhibit superior-grade microwave dielectric properties: εr = 10.86, Q × f = 55844 GHz, τf = -53.89 ppm/℃, and εr = 9.28, Q × f = 70716 GHz, τf = -58.46 ppm/℃, indicating that these two ceramics are highly promising for application in the 6 G communication domain.
期刊介绍:
The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.