Crystal structure and microwave dielectric properties of Li2Mg0.6−  Co Zn0.4SiO4 ceramic for LTCC applications

Zhong, Maofeng; Su, Hua; Jing, Xiaolin; Li, Yuanxun; Lü, Qiang; Jing, Yulan

doi:10.1016/j.ceramint.2020.02.081

Cited by 24 publications

(5 citation statements)

References 26 publications

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“…Silicates are suitable LTCCs because of their chemical compatibility with a suitable electrode. 31,32 The (1 − x)BaAl 2 Si 2 O 8 −xCaSnSiO 5 (x = .4) ceramics with excellent microwave dielectric properties could be suitable for LTCC applications. The XRD patterns of 0.6BaAl 2 Si 2 O 8 −0.4CaSnSiO 5 −y wt.% LiF ceramics are shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Zhou

Yan

et al. 2021

Int J Applied Ceramic Tech

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In the present study, (1 − x)BaAl 2 Si 2 O 8 −xCaSnSiO 5 −y wt.% LiF microwave dielectric ceramics were prepared through the traditional solid-state sintering at 950−1395 • C for 5 h. The BaAl 2 Si 2 O 8 phase could coexist with the CaSnSiO 5 phase at (1 − x)BaAl 2 Si 2 O 8 −xCaSnSiO 5 (.2 ≤ x ≤ .6) ceramics, and no other secondary phase was observed. The CaSnSiO 5 , as a τ f regulator, adjusted the negative τ f value of BaAl 2 Si 2 O 8 to near zero. Excellent microwave dielectric properties (ε r = 8.1, Q × f = 37 560 GHz, and τ f = −1.5 ppm/ • C) were obtained from the 0.6BaAl 2 Si 2 O 8 −0.4CaSnSiO 5 ceramic. The sintering temperature of 0.6BaAl 2 Si 2 O 8 −0.4CaSnSiO 5 ceramic decreased from 1375 • C to 950 • C by introducing 2 wt.% LiF. The 0.6BaAl 2 Si 2 O 8 −0.4CaSnSiO 5 −2 wt% LiF ceramic exhibited remarkable microwave dielectric properties (ε r = 7.6, Q × f = 17 420 GHz, and τ f = −12.2 ppm/ • C) and could be applied to the low-temperature co-fired ceramic (LTCC) field. K E Y W O R D S (1 -x)BaAl 2 Si 2 O 8 −xCaSnSiO 5 ceramic, LTCC applications, microwave dielectric properties, phase transition 1 480

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Section: Resultsmentioning

confidence: 99%

Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Zhou

Yan

et al. 2021

Int J Applied Ceramic Tech

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“…According to previous work, the Li 2 CO 3 –Bi 2 O 3 –B 2 O 3 –SiO 2 (LBBS) glass exerts a significant effect on effective sintering considering its composition of diversified low‐melting oxides 16–18 . Therefore, the LBBS glass is expected to maintain or even enhance the microwave dielectric performance of low‐fired ZnZrNb 2 O 8 ceramics with single phase under low addition.…”

Section: Introductionmentioning

confidence: 99%

“…According to previous work, the Li 2 CO 3 -Bi 2 O 3 -B 2 O 3 -SiO 2 (LBBS) glass exerts a significant effect on effective sintering considering its composition of diversified lowmelting oxides. [16][17][18] Therefore, the LBBS glass is expected to maintain or even enhance the microwave dielectric performance of low-fired ZnZrNb 2 O 8 ceramics with single phase under low addition. In the present work, singlephase ZnZrNb 2 O 8 ceramics are synthesized at low sintering temperature, and the influences of the additive on crystal compositions, Raman vibration, microstructures, and microwave dielectric properties are systematically investigated.…”

Section: Introductionmentioning

confidence: 99%

Crystal structure, Raman spectra, and modified dielectric properties of pure‐phase ZnZrNb₂O₈ ceramics at low temperature

et al. 2022

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Low-temperature co-fired ceramics technology (LTCC) exhibits enormous superiorities in packaging, integration, and interconnection. However, the complex compositions of low-melting point sintering aids may react with ceramic matrix, which increases the difficulties of phase control and tape casting. In this work, the Li 2 CO 3 -B 2 O 3 -Bi 2 O 3 -SiO 2 (LBBS) sintering aid was adopted to sinter ZnZrNb 2 O 8 ceramics with single phase at low temperatures. The LBBS glass could be used to fabricate pure-phase ZnZrNb 2 O 8 ceramics at a low sintering temperature, promote the grain growth, and increase the densification of ZnZrNb 2 O 8 ceramics. Furthermore, the unit cell volume, NbO 6 octahedral distortion, Raman shift, and FWHM changed along with LBBS addition, thereby affecting the microwave dielectric properties. Remarkably, ZnZrNb 2 O 8 ceramics doped with 0.75 wt.% LBBS at 950 • C were chemically compatible with the silver electrode and exhibited excellent microwave dielectric characteristics: ε r = 27.1, Q × f = 54 500 GHz, and τ f = −48.7 ppm/ • C, providing candidates for LTCC applications.

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“…Dielectric ceramics have been widely used in microwave devices because of their low dielectric loss, serialized dielectric constant and temperature coefficient of resonant frequency which can be adjusted to near zero. In the field of 5G communication and the Internet of Things, microwave dielectric ceramics with low dielectric constant are often used in microwave substrates, because according to Td = L ξ ߝ /c(where L is the distance travelled by the signal, and c is the speed of light), low dielectric constant can effectively reduce the time delay of high-frequency signals during transmission [1,2]. At the same time, LTCC technology, which requires sintering temperature below 950Ԩ, has been paid more attention in the research of microwave dielectric ceramics to follow the development trend of device miniaturization and integration [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Microwave dielectric properties of Na⁺-substituted CaMg_0.9Li_0.2Si₂O₆ ceramics

Huang

Tang

2022

MATEC Web Conf.

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Ceramics with low dielectric constant are widely used in high frequency substrates. The low temperature sintered CaMg0.9-xNa2xLi0.2Si2O6(x = 0–0.05 and 0.1) ceramics with low dielectric constant and dielectric loss were prepared by the traditional solid-state reaction method, with 0.5wt%LBSCA additive. The XRD patterns of the samples were obtained by X-ray diffraction and it was found that there were three ceramic components, CaMgSi2O6, CaSiO3 and Na2MgSiO4, which indicated that the experimental sample was a multiphase ceramic system. Through the trend of bulk density as functions of the content of substitution and the change of SEM morphology, it could be found that appropriate amount of Na+ substitution can promote the grain growing and the densification of ceramics. Results demonstrated that both the Q × f and εr were relevant to bulk density and the second phase. The τf was also affected by the second phase to some extent. In particular, the ceramics sintered at 925 °C for 3h possessed the desirable microwave dielectric properties for LTCC application: εr = 7.03, Q × f = 17,956 GHz, and τf= −79 ppm/°C.

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Crystal structure and microwave dielectric properties of Li2Mg0.6− Co Zn0.4SiO4 ceramic for LTCC applications

Cited by 24 publications

References 26 publications

Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Crystal structure, Raman spectra, and modified dielectric properties of pure‐phase ZnZrNb₂O₈ ceramics at low temperature

Microwave dielectric properties of Na⁺-substituted CaMg_0.9Li_0.2Si₂O₆ ceramics

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Crystal structure and microwave dielectric properties of Li2Mg0.6− Co Zn0.4SiO4 ceramic for LTCC applications

Cited by 24 publications

References 26 publications

Temperature‐stable BaAl2Si2O8–CaSnSiO5 microwave dielectric ceramics

Temperature‐stable BaAl2Si2O8–CaSnSiO5 microwave dielectric ceramics

Crystal structure, Raman spectra, and modified dielectric properties of pure‐phase ZnZrNb2O8 ceramics at low temperature

Microwave dielectric properties of Na+-substituted CaMg0.9Li0.2Si2O6 ceramics

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Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Temperature‐stable BaAl₂Si₂O₈–CaSnSiO₅ microwave dielectric ceramics

Crystal structure, Raman spectra, and modified dielectric properties of pure‐phase ZnZrNb₂O₈ ceramics at low temperature

Microwave dielectric properties of Na⁺-substituted CaMg_0.9Li_0.2Si₂O₆ ceramics