Effects of Li-ion substitution on the microwave dielectric properties of low-temperature sintered ceramics with nominal composition Li2xMg2−xSiO4

Du, Xiangyu; Su, Hua; Zhang, Huaiwu; Jing, Yulan; Zhou, Zhenhua; Gan, Gongwen; Tang, Xiaoli

doi:10.1016/j.ceramint.2017.10.193

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…This could be originated from the portion increase of the second phases and the cell volume of CaMgSi 2 O 6 main phase. The appearance of pores might be due to the Li + volatilization [28]. Undoubtedly, Li + substitution could contribute to sintering temperature reduction and densification improvement of the CaMg 1-x Li 2x Si 2 O 6 ceramics, which would lead to significant influences on microwave dielectric properties.…”

Section: Resultsmentioning

confidence: 99%

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Huang

et al. 2020

J Adv Ceram

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In this study, low-temperature fired CaMg 1-x Li 2x Si 2 O 6 microwave dielectric ceramics were prepared via the traditional solid-state reaction method. In this process, 0.4 wt% Li 2 CO 3-B 2 O 3-SiO 2-CaCO 3-Al 2 O 3 (LBSCA) glass was added as a sintering aid. The results showed that ceramics consisted of CaMgSi 2 O 6 as the main phase. The second phases were CaSiO 3 always existing and Li 2 SiO 3 occurring at substitution content x > 0.05. Li + substitution effectively lowered sintering temperature due to 0.4 wt% LBSCA and contributed to grain densification, and the most homogeneous morphology could be observed at x = 0.05. The effects of relative density, the second phase, and ionic polarizability on dielectric constant ( r) were investigated. The quality factor (Q × f) varied with packing fraction that concerned the second phase. Moreover, the temperature coefficient of the resonant frequency (τ f) was influenced by MgO 6 octahedral distortion and bond valence. Excellent dielectric properties of the CaMg 1-x Li 2x Si 2 O 6 ceramic was exhibited at x = 0.05 with  r = 7.44, Q × f = 41,017 GHz (f = 15.1638 GHz), and τ f = −59.3 ppm/℃ when sintered at 900 ℃. It had a good application prospect in the field of low-temperature co-fired ceramic (LTCC) substrate and devices.

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Section: Resultsmentioning

confidence: 99%

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Huang

et al. 2020

J Adv Ceram

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“…However, the enhancement of microwave dielectric properties has predominantly relied on the addition of sintering aids, such as ZnTiO3+1wt% B2O3 ceramics (Q × f = 49,000 GHz, τf = −32.35 ppm/°C) [26] and (Zn0.9Mg0.1)TiO3 + 0.5 wt% Zn-B-Si (Q × f = 61,630 GHz, τf = −76 ppm/°C) [27], with limited improvements. Particularly noteworthy is the observation by Huang et al [34] that substituting Mg 2+ sites in CaMgSi2O6 ceramics with Li + resulted in outstanding microwave dielectric properties, a finding further validated in Li2xMg2-xSiO4 ceramics [35]. It was demonstrated that the introduction of Li + ions can lead to the development of phase-stable solid solutions in Zn/Ti-based microwave dielectric ceramics, exhibiting favorable compatibility and excellent microwave dielectric properties.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 93%

Lattice evolution, order transformation, and microwave dielectric properties of the Zn _{1–
x}Li _{2
x}TiO ₃ (0 ≤ x ≤ 1) system ceramics

Du,

Jiang,

et al. 2024

Journal of Advanced Ceramics

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“…Thus, Li + substituted or Li + ‐containing compounds have been used as sintering aids to improve the sintering characteristics of ceramics. The influence that Li + has on microwave dielectric properties of ceramics is shown in Figure 1 6‐17 ; as seen, the addition of Li + not only reduces the sintering temperature and dielectric loss but also has no obvious effect on the dielectric constant, which does not change the application frequency range of the material.…”

Section: Introductionmentioning

confidence: 99%

Bond characteristics and microwave dielectric properties of high‐Q materials in li‐doped Zn₃B₂O₆ systems

et al. 2021

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The bond characteristics, Raman spectroscopy, and microwave dielectric properties of Zn3‐xLi2x(BO3)2 ceramics prepared by solid‐state reaction method were investigated. According to the complex chemical bond theory, the bond ionicity and lattice energy of the B–O bond were proved to contributed more to the electric polarization and phase structure stability than that of A‐site bond. Thus, the B–O bond had a dominant effect on the dielectric constant and Q × f values. The optimization of the τf value can be attributed to the bond valence. Moreover, the shift and full width at half maximum of the Raman peak were closely related to the dielectric constant and Q × f values, respectively. On the whole, Li+ substitution contributed greatly to improve the temperature stability and reducing the dielectric loss of Zn3‐xLi2x(BO3)2 ceramics. Additionally, Zn2.99Li0.02(BO3)2 ceramics sintered at 850 °C exhibited satisfactory microwave dielectric properties of εr=6.59, Q × f=122,030 GHz, τf=−76.9 ppm/°C, and had good chemical compatibility with silver.

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Effects of Li-ion substitution on the microwave dielectric properties of low-temperature sintered ceramics with nominal composition Li2xMg2−xSiO4

Cited by 15 publications

References 24 publications

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Lattice evolution, order transformation, and microwave dielectric properties of the Zn _{1–
x}Li _{2
x}TiO ₃ (0 ≤ x ≤ 1) system ceramics

Bond characteristics and microwave dielectric properties of high‐Q materials in li‐doped Zn₃B₂O₆ systems

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Effects of Li-ion substitution on the microwave dielectric properties of low-temperature sintered ceramics with nominal composition Li2xMg2−xSiO4

Cited by 15 publications

References 24 publications

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6 (x = 0−0.3) ceramics

Lattice evolution, order transformation, and microwave dielectric properties of the Zn 1&ndash; x Li 2 x TiO 3 (0 &le; x &le; 1) system ceramics

Bond characteristics and microwave dielectric properties of high‐Q materials in li‐doped Zn3B2O6 systems

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Lattice evolution, order transformation, and microwave dielectric properties of the Zn _{1–
x}Li _{2
x}TiO ₃ (0 ≤ x ≤ 1) system ceramics

Bond characteristics and microwave dielectric properties of high‐Q materials in li‐doped Zn₃B₂O₆ systems