The Correlations between Complex Chemical Bond Theory and Microwave Dielectric Properties of Ca2MgSi2O7 Ceramics

Xiao, Mi; Wei, Yanshuang; Zhang, Ping

doi:10.1007/s11664-018-06888-8

Cited by 25 publications

(6 citation statements)

References 21 publications

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“…P‐V‐L theory is developed by Phillips, Van Vechten, and Levine from the end of the 1960s to 1973s, which is an effective method to build the structure‐property relationships based on the characteristics of chemical bonds 38‐43 . The bond susceptibility χ μ , lattice energy, and linear thermal expansion coefficient, which are highly correlated with the microwave dielectric properties, can be calculated from the P‐V‐L theory 13,16,30 …”

Section: Resultsmentioning

confidence: 99%

“…[38][39][40][41][42][43] The bond susceptibility χ μ , lattice energy, and linear thermal expansion coefficient, which are highly correlated with the microwave dielectric properties, can be calculated from the P-V-L theory. 13,16,30 Before calculating the bond susceptibility χ μ and lattice energy, the complex crystal BaCuSi 4 O 10 should be decomposed into binary crystals and the sub-chemical is written as follows 44 :…”

Section: Methodsmentioning

confidence: 99%

“…The most potential microwave dielectrics with low ε r for millimeter‐wave devices exist in silicates, such as Mg 2 Al 4 Si 5 O 18 , CaMgSiO 4 , BaAl 2 Si 2 O 8 , CaMgSi 2 O 6 , and Ca 2 MgSi 2 O 7 7‐14 . The low ε r originates from the strong Si‐O bond and the reduced rattling of cations in [SiO 4 ] 4− tetrahedral 15 .…”

Section: Introductionmentioning

confidence: 99%

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Phase evolution, crystal structure, and microwave dielectric properties of gillespite‐type ceramics

et al. 2020

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A gillespite‐structured MCuSi4O10 (M = Ba1‐xSrx, Sr1‐xCax) ceramics with tetrahedral structure (P4/ncc) were prepared by solid‐state reaction method. X‐ray diffraction and thermogravimetry with differential scanning calorimetry (TG‐DSC) were employed to study the phase synthesis process of BaCuSi4O10. Pure BaCuSi4O10 phase was obtained at 1075°C and decomposed into BaSiO3, BaCuSi2O6, and SiO2 when calcined at 1200°C. The relationships between the crystal structure and microwave dielectric properties of MCuSi4O10 ceramics were revealed based on the Rietveld refinement and P‐V‐L complex chemical bond theory. The dielectric constant (εr) decreased linearly with decreasing total bond susceptibility and ionic polarizability. Quality factor (Q × f) was closely dependent on bond strength and lattice energy. The temperature coefficient of resonant frequency (τf) was controlled by the stability of [CuO4]6− plane in MCuSi4O10. Optimum microwave dielectric properties were obtained for SrCuSi4O10 when sintered at 1100°C for 3 hours with a εr of 5.59, a Q × f value of 82 252 GHz, and a τf of −41.34 ppm/°C. Thus, SrCuSi4O10 is a good candidate for millimeter‐wave devices.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Phase evolution, crystal structure, and microwave dielectric properties of gillespite‐type ceramics

et al. 2020

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“…Microstructure with many pores of CaMnSi 2 O 6 was observed by Chen et al [36], and the effect of porosity on the properties was investigated by spherical-pore model. Akermanite-type A 2 BC 2 O 7 (A = Sr, Ca; B = Mg, Zn, Co, Mn; C = Si, Ge) systems belong to the structure group of 1 42 P m (113) in tetragonal, while melilite-type A 2 BC 2 O 7 (A = Ba; B = Co, Zn, Cu, Mg; C = Si, Ge) and AB 2 C 2 O 7 (A = Ba; B = Co, Zn; C = Si, Ge) systems were clarified in monoclinic structure [37][38][39][40][41][42][43][44]. The literature about the effect of structure evolution and chemical bond parameters in A 2 BSi 2 O 7 and AB 2 Si 2 O 7 represented that the Si-O bond played the significant role in structural stability and dielectric polarization.…”

Section: Ternary Silicate and Germanate Ceramicsmentioning

confidence: 99%

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

et al. 2021

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The explosive process of 5G communication evokes the urgent demand of miniaturized and integrated dielectric ceramics filter. It is a pressing need to advance the development of dielectric ceramics utilization of emerging technology to design new materials and understand the polarization mechanism. This review provides the summary of the study of microwave dielectric ceramics (MWDCs) sintered higher than 1000 from 2010 up to now, °C with the purpose of taking a broad and historical view of these ceramics and illustrating research directions. To date, researchers endeavor to explain the structure-property relationship of ceramics with multitude of approaches and design a new formula or strategy to obtain excellent microwave dielectric properties. There are variety of factors that impact the permittivity, dielectric loss, and temperature stability of dielectric materials, covering intrinsic and extrinsic factors. Many of these factors are often intertwined, which can complicate new dielectric material discovery and the mechanism investigation. Because of the various ceramics systems, pseudo phase diagram was used to classify the dielectric materials based on the composition. In this review, the ceramics were firstly divided into ternary systems, and then brief description of the experimental probes and complementary theoretical methods that have been used to discern the intrinsic polarization mechanisms and the origin of intrinsic loss was mentioned. Finally, some perspectives on the future outlook for high-temperature MWDCs were offered based on the synthesis method, characterization techniques, and significant theory developments.

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“…Included in our studies were various melilite-type compounds, which are already known for example as dielectric materials or as phosphors from other application areas. [8][9][10][11][12][13][14][15] Particular attention was given on the substitution with Si, as the corresponding Si-phases Sr 2 MgSi 2 O 7 and Sr 2 MnSi 2 O 7 crystallize in isotypic structures, due to the fact that the ionic radius of Si 4+ is similar to that of Ge 4+ (Si 4+ = 0.40 Å, Ge 4+ = 0.53 Å). 16 In the present paper, we disclose the successful preparation of new inorganic blue pigments in the melilite-type structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of non-toxic inorganic blue pigments in the melilite-type structure

et al. 2020

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The Correlations between Complex Chemical Bond Theory and Microwave Dielectric Properties of Ca2MgSi2O7 Ceramics

Cited by 25 publications

References 21 publications

Phase evolution, crystal structure, and microwave dielectric properties of gillespite‐type ceramics

Phase evolution, crystal structure, and microwave dielectric properties of gillespite‐type ceramics

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

Synthesis of non-toxic inorganic blue pigments in the melilite-type structure

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