Temperature stable Li2Ti0.75(Mg1/3Nb2/3)0.25O3-based microwave dielectric ceramics with low sintering temperature and ultra-low dielectric loss for dielectric resonator antenna applications

Guo, Huanhuan; Zhou, Di; Du, Chao; Wang, Peng-Jian; Liu, Wenfeng; Pang, Li‐Xia; Wang, Qiuping; Su, Jinzhan; Singh, Charanjeet; Trukhanov, S. V.

doi:10.1039/d0tc00326c

Cited by 162 publications

(49 citation statements)

References 52 publications

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“…In addition, the sintering temperature of MgO-2B2O3 ceramics is still too high for LTCC devices [15]. Sintering additives [16][17][18][19][20][21][22][23][24][25][26], ultrafine powders [27][28][29][30][31], and low sintering temperatures materials [32][33][34] can be used to reduce the sintering temperature of ceramics. However, the preparation of ultrafine powder with low intrinsic sintering temperatures is expensive, complex and hard to be scaled up.…”

Section: Introductionmentioning

confidence: 99%

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

WANG

et al. 2021

Preprint

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The bulk density, sintering behavior and microwave dielectric properties of MgO-2B2O3 series ceramics synthesized by solid-state reaction method were systematically studied in this paper. X-ray diffraction and microstructural analysis revealed that the as-prepared MgO-2B2O3 ceramics possessed a single-phase structure with rod-like morphology. Through the investigation of the effects of different dosages of H3BO3 and BCB on bulk density, sintering behavior and microwave dielectric properties of MgO-2B2O3 ceramics, the optimum sintering temperature was obtained at an addition of 30wt%H3BO3 and 8wt%BCB and the sintering temperature was reduced to 825 oC. The addition of 40wt %H3BO3 and 4 wt%BCB increased the quality factor Q×f, permittivity εr and temperature coefficient of resonance frequency τf of MgO-2B2O3 to 44,306 GHz, 5.1 and -32 ppm/oC, respectively, meeting the criteria of low-temperature co-fired ceramics.

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Section: Introductionmentioning

confidence: 99%

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

WANG

et al. 2021

Preprint

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“…In order to meet the requirement of 5 G communications, microwave dielectric ceramics with low permittivity (ε r ) and high-quality factor (Q × f) is one of the research emphases, since low ε r can provide high-speed signal transmission and high Q × f usually ensure good frequency selectivity. Additionally, these ceramics should possess a nearzero temperature coefficient of resonant frequency (τ f ) for satisfactory thermal stability [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Structure, Raman spectra and microwave dielectric properties of novel garnet-type Ca₃MZrGe₃O₁₂ (M = Co, Zn) ceramics

Su¹,

Fang

et al. 2021

Journal of Asian Ceramic Societies

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Two novel garnet-type ceramics Ca 3 MZrGe 3 O 12 (M = Co and Zn) with pure phase were prepared through a solid-state reaction method. Structure-property relationships were studied by the Rietveld refinement and Raman spectra. The appearance of two weak symmetric stretching vibrational peaks in Ca 3 ZnZrGe 3 O 12 might be due to the lower ordering. Higher Q × f value in Co-analogue was related to the larger packing fraction and the lower FWHM of A 1g mode. The smaller oxygen bond valence in Ca 3 CoZrGe 3 O 12 indicates a smaller τ f value. At the optimized sintering temperature of 1280 °C, Ca 3 CoZrGe 3 O 12 shows desirable microwave dielectric properties with ε r of 10.37, Q × f value of 60,100 GHz, and τ f value of −28.5 ppm/ o C. The Ca 3 ZnZrGe 3 O 12 ceramic sintered at 1200 °C has the best microwave dielectric properties with ε r of 10.48, Q × f value of 49,700 GHz, and τ f value of −35.8 ppm/ o C.

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“…[ 1–4 ] In addition, with the rapid development of electronic industry and forthcoming large‐scale application of the fifth generation wireless systems, the signal delay and energy loss heating have become urgent problems to be solved. Under high frequency, demanding requirements, such as ultralow dielectric constant and dielectric loss, [ 5–8 ] are put forward for the epoxy resin commonly used in packaging.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of novel phosphonium bromide‐montmorillonite nanocompound and its performance in flame retardancy and dielectric properties of epoxy resins

Qin

Zhang

2020

Polymer Composites

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To enhance the flame retardancy of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) on epoxy resins (EPs), by addition reaction with allyltriphenylphosphonium bromide (ATPB), a novel DOPO‐containing phosphonium bromide (DOPO‐ATPB) was synthesized and its structure was characterized by Fourier transform infrared (FTIR), 13C nuclear magnetic resonance (NMR), and X‐ray photoelectron spectroscopy (XPS). By intercalating DOPO‐ATPB into montmorillonite (MMT) layers and with the help of solvents, the intercalated nanocompound (DPAB‐MMT) was prepared, and X‐ray diffraction (XRD) confirmed a d‐spacing expansion of DPAB‐MMT layers (from ~1.01 to ~2.10 nm). The epoxy composites with DOPO‐ATPB and DPAB‐MMT were prepared, and their effects on the flame retardancy, mechanical and dielectric properties were studied by limiting oxygen index (LOI), UL‐94 vertical burning test, cone calorimetry, three‐point bend testing, and the impedance analyzer. The results show that DOPO‐ATPB endows EPs with excellent flame retardancy and dielectric properties, and DPAB‐MMT can be well dispersed in EPs. Compared with pure EP, the EP/8 wt% DOPO‐ATPB increased the LOI values from 23.0% to 32.5%, achieved V‐0 rating and decreased the peak heat release rate (p‐HRR) by approximately 36.6%. With the 8 wt% DPAB‐MMT, the LOI values of epoxy composite was increased from 23.0% to 35.9%, the p‐HRR was decreased by ~25.4%, the mechanical flexural strength was enhanced by approximately 13.4% and the dielectric loss (ε″) was decreased from 0.080 to 0.052 at 100 Hz.

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Temperature stable Li₂Ti_0.75(Mg_1/3Nb_2/3)_0.25O₃-based microwave dielectric ceramics with low sintering temperature and ultra-low dielectric loss for dielectric resonator antenna applications

Abstract: The LTMN0.25 + 1 wt% 0.6CuO–0.4B2O3 ceramic with low sintering temperature, small density and excellent performance have wide application prospects in 5G devices.

Cited by 162 publications

References 52 publications

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

Structure, Raman spectra and microwave dielectric properties of novel garnet-type Ca₃MZrGe₃O₁₂ (M = Co, Zn) ceramics

Synthesis of novel phosphonium bromide‐montmorillonite nanocompound and its performance in flame retardancy and dielectric properties of epoxy resins

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Temperature stable Li2Ti0.75(Mg1/3Nb2/3)0.25O3-based microwave dielectric ceramics with low sintering temperature and ultra-low dielectric loss for dielectric resonator antenna applications

Abstract: The LTMN0.25 + 1 wt% 0.6CuO–0.4B2O3 ceramic with low sintering temperature, small density and excellent performance have wide application prospects in 5G devices.

Cited by 162 publications

References 52 publications

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

Sintering Behavior and Microwave Dielectric Properties of MgO-2B 2 O 3 - Xwt %H 3 BO 3 - Ywt %BCB Ceramics

Structure, Raman spectra and microwave dielectric properties of novel garnet-type Ca3MZrGe3O12 (M = Co, Zn) ceramics

Synthesis of novel phosphonium bromide‐montmorillonite nanocompound and its performance in flame retardancy and dielectric properties of epoxy resins

Contact Info

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Resources

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Temperature stable Li₂Ti_0.75(Mg_1/3Nb_2/3)_0.25O₃-based microwave dielectric ceramics with low sintering temperature and ultra-low dielectric loss for dielectric resonator antenna applications

Structure, Raman spectra and microwave dielectric properties of novel garnet-type Ca₃MZrGe₃O₁₂ (M = Co, Zn) ceramics