Low loss and good chemical compatibility with silver electrodes of Cu2+-substituted Ba3Ti4Nb4O21 ceramics realizing low temperature co-fired ceramics technology: Crystal structure, vibration modes and chemical bonds studies

Wu, Xiaohui; Zhang, Qin; Huang, Fangyi; Huo, Xingyu; Li, Fuyu; Li, Yuanxun; Su, Hua

doi:10.1016/j.jeurceramsoc.2022.04.051

Cited by 22 publications

(11 citation statements)

References 41 publications

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“…As can be seen, both peaks moved toward the lower wavenumbers with the increasing Co substitution, while their FWHM values showed an increasing trend. The shift in the Raman peaks was confirmed to be related to the chemical bond length 21 . The incorporation of Co 2+ into the lattice causes the increase in the corresponding chemical bonds, which in turn leads to the downshift in the relevant vibrational Raman peaks.…”

Section: Resultsmentioning

confidence: 84%

“…The shift in the Raman peaks was confirmed to be related to the chemical bond length. 21 The incorporation of Co 2+ into the lattice causes the increase in the corresponding chemical bonds, which in turn leads to the downshift in the relevant vibrational Raman peaks. The relationship between the FWHM and the dielectric loss as well as the τ f parameter will be discussed below.…”

Section: Resultsmentioning

confidence: 99%

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The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

Huang,

Tang,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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In this study, the microwave dielectric properties of Co2+‐substituted BaZnP2O7 ceramics prepared through conventional solid‐state synthesis were investigated. X‐ray diffraction, Rietveld refinement, energy‐dispersive spectroscopy, and Raman spectroscopy all indicated that BaZn1−xCoxP2O7 ceramics sintered at 875°C were composed of a single phase. The lattice strain and crystallite size were estimated using Williamson–Hall (W–H) method. Both the scanning electron microscopy images and density measurements showed that Co2+ ions had an effect on the grain growth and densification of ceramics. The microwave dielectric properties were influenced by the intrinsic and extrinsic factors that varied with the increase of x value. An optimal performance (εr = 7.62, Q × f = 600 45 GHz, and τf = −74 ppm/°C) was achieved at x = .01. The porosity and relative density played a significant role in the dielectric constant εr: the denser the ceramic structure, the larger the dielectric constant. The Q × f and τf values were negatively correlated with the full width at half maximum of the Raman vibrational peak at approximately 1049 cm−1. Moreover, the Q × f value was improved compared to that of the undoped BaZnP2O7 ceramics. Therefore, cobalt ion substitution is an effective strategy to enhance the performance of microwave dielectric ceramics.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

Huang,

Tang,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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“…The relationship between the porosity-corrected permittivity and bond ionicity (f i ) is illustrated in Figure 8. According to Batsanov 32 the bond ionicity of the chemical bonds has a significant important effect on the relative permittivity; the relationship is given by the following formula 33 :…”

Section: Microwave Dielectric Propertiesmentioning

confidence: 99%

“…3 In 2022, Wu ceramics collectively exerted a significant influence on microwave dielectric properties. 4 Previous reports primarily focused on the calculation of chemical bond properties using P-V-L theory and relationships between the microwave dielectric properties and chemical bonds. However, few investigations focused on the mechanism of change of chemical bond properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics

Shi,

Wang,

Xia

et al. 2024

J Am Ceram Soc.

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Novel YxCe1−xO2−0.5x (x = 0–0.7) ceramics, designed by replacing Ce4+ with Y3+, were prepared using a conventional oxide reaction. The oxygen vacancies, measured by X‐ray photoelectron spectroscopy and analyzed through the electronic structure calculated via the first‐principles method, were employed to investigate the effective valence electron charge, which plays a decisive role in calculating bond ionicity using P–V–L theory. After the substitution of Y3+ ions, the effective valence electron charge of the Ce–O bond changed because of an increase in oxygen vacancies, ultimately leading to a decrease in the Ce/Y–O bond ionicity of the YxCe1−xO2−0.5x ceramics. For microwave dielectric properties, when the YxCe1−xO2−0.5x (x = 0−0.5) ceramics were in the pure phase, porosity‐corrected permittivity and Q × f values depended on the bond ionicity, and the temperature coefficient of the resonance frequency was analyzed using the bond valence. When the YxCe1−xO2−0.5x (x = 0.6 and 0.7) ceramics were in multiple phases, the microwave dielectric properties were associated with the phase composition.

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“…Therefore, some researchers dopped with a variety of sintering aids, such as LBSCA glass, B2O3+CuO, MnCO3+CuO, etc. [8][9][10] Their microwave performance were including as follow: adding 0.6 wt% LBSCA and sintering at 925℃ was obtained with εr=44.18, Q×f=17860 GHz, and τf=94.76 ppm/℃; adopting 1 wt% B2O3+3 wt% CuO and sintering at 900℃ was achieved with εr=65, Q×f=16000 GHz, and τf=101 ppm/℃; appending 0.2 MnCO3-0.8 CuO and sintering at 950℃ was gained a εr=66, Q×f=13400 GHz, and τf=60 ppm/℃. Although the sintering temperature had been successfully lowered, the temperature coefficient τf was still very high, which was extremely unfavorable to the stability of 5G communication devices.…”

Section: Introductionmentioning

confidence: 99%

Li₂WO₄ Composite Ba₃Ti₄Nb₄O₂₁ Microwave Dielectric Ceramics with Near-Zero Temperature Coefficient and Low-Temperature Sintering for 5G Communication Devices

2023

J. Phys.: Conf. Ser.

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In order to solve the problem of device miniaturization, it is urgent to develop high performance medium K materials. A series of (1-x) Ba3Ti4Nb4O21-x Li2WO4 ceramics (1-xBTN-xLW, x=12, 15, 17 and 20 mol%) were fabricated by soild-state reaction method. Li2WO4 as the effective sintering aids (~640°C) not only promoted ceramic densification and also decreased the temperature to 925°C. Among them, the 0.83BTN-0.17LW ceramic achieved best microwave performance with ε r~21.85, Q×f~10534 GHz, τ f ∼-7.78 ppm/°C. Especially, the second phase BaWO4 played major factor on microwave performance, making high K materials transfer into medium K materials and decrease the loss. More encouragingly, the temperature coefficient τ f was near zero. The above outstanding results signified that the 0.83BTN-0.17LW ceramic was expected to be a candidate material for LTCC miniaturized devices.

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Low loss and good chemical compatibility with silver electrodes of Cu2+-substituted Ba3Ti4Nb4O21 ceramics realizing low temperature co-fired ceramics technology: Crystal structure, vibration modes and chemical bonds studies

Cited by 22 publications

References 41 publications

The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics

Li₂WO₄ Composite Ba₃Ti₄Nb₄O₂₁ Microwave Dielectric Ceramics with Near-Zero Temperature Coefficient and Low-Temperature Sintering for 5G Communication Devices

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Low loss and good chemical compatibility with silver electrodes of Cu2+-substituted Ba3Ti4Nb4O21 ceramics realizing low temperature co-fired ceramics technology: Crystal structure, vibration modes and chemical bonds studies

Cited by 22 publications

References 41 publications

The microwave dielectric properties of the low‐temperature firing BaZnP2O7 ceramics with Co2+ substitution

The microwave dielectric properties of the low‐temperature firing BaZnP2O7 ceramics with Co2+ substitution

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of YxCe1−xO2−0.5x (x = 0–0.7) ceramics

Li2WO4 Composite Ba3Ti4Nb4O21 Microwave Dielectric Ceramics with Near-Zero Temperature Coefficient and Low-Temperature Sintering for 5G Communication Devices

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Product

Resources

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The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

The microwave dielectric properties of the low‐temperature firing BaZnP₂O₇ ceramics with Co²⁺ substitution

Effects of oxygen vacancy on bond ionicity and microwave dielectric properties of Y_xCe₁₋_xO_2−0.5_x (x = 0–0.7) ceramics

Li₂WO₄ Composite Ba₃Ti₄Nb₄O₂₁ Microwave Dielectric Ceramics with Near-Zero Temperature Coefficient and Low-Temperature Sintering for 5G Communication Devices