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Bond characteristics and microwave dielectric properties of (Li0.5Ga0.5)(2+) doped Mg2Al4Si5O18 ceramics
Lou, WC; Song, KX; Hussain, F; Liu, B; Bafrooei, HB; Lin, HX; Su, WT; Shi, F; Wang, DW
2020-12-15
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Issue18Pages:28631
SubtypeArticle
AbstractCordierite ceramic is one kind of important electronic materials for radio frequency circuit. In this work, Mg2-x(Li0.5Ga0.5)(x)Al4Si5O18 (0 <= x <= 0.1) ceramics with pure cordierite phase, were successfully synthesized via the traditional solid state reaction method. The dependence of microwave dielectric properties on the crystal structure was analyzed in detail by the complex chemical bond theory (P-V-L theory) and classical dielectric polarizability theory. The dielectric constant (epsilon(r)) was mainly related to the density, bond ionicity and ionic polarizability of Mg2-x (Li0.5Ga0.5)(x)Al4Si5O18 ceramics. The quality factor (Q x f) was in relationship to the lattice energy, atomic packing fraction and centrosyrnmetry of [Si4Al2O18] hexagonal ring in cordierite crystal structure. The temperature coefficient of resonant frequency (tau(f)) value was dominated by the bond energy and distortions of [MgO6] octahedron. The maximum values of Q x f = 50,560 GHz and epsilon(r) = 4.72 were obtained for undoped Mg2Al4Si5O18 and Mg1.98Li0.01Ga0.01Al4Si5O18, respectively.
DOI10.1016/j.ceramint.2020.08.022
WOS KeywordLATTICE ENERGY ; THERMAL-EXPANSION ; CRYSTAL-STRUCTURE ; RAMAN-SPECTRA ; COEFFICIENT ; REFINEMENT ; IONICITY
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27582
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lou, WC,Song, KX,Hussain, F,et al. Bond characteristics and microwave dielectric properties of (Li0.5Ga0.5)(2+) doped Mg2Al4Si5O18 ceramics[J]. CERAMICS INTERNATIONAL,2020(18):28631.
APA Lou, WC.,Song, KX.,Hussain, F.,Liu, B.,Bafrooei, HB.,...&Wang, DW.(2020).Bond characteristics and microwave dielectric properties of (Li0.5Ga0.5)(2+) doped Mg2Al4Si5O18 ceramics.CERAMICS INTERNATIONAL(18),28631.
MLA Lou, WC,et al."Bond characteristics and microwave dielectric properties of (Li0.5Ga0.5)(2+) doped Mg2Al4Si5O18 ceramics".CERAMICS INTERNATIONAL .18(2020):28631.
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