JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 25
·1-11
·
IF 2.8
Wang Chen Bo,Gong Wei Ping,Jin Jing Ye,Bai Hao Nan,Yang Yang,Zhou Qing Wei,Yu Xue Qing,Mao Min Min,Cao Lei,Song Kai Xin,Liu Bing
SrF 2 is a promising low-permittivity fluoride with excellent microwave dielectric properties. Nevertheless, realizing densification in SrF 2 ceramics remains challenging due to their low surface energy. In this work, a series of SrF 2 – x wt%LiF ( x = 0.5–20) ceramics were synthesized using the conventional solid-state reaction method. The incorporation of LiF effectively lowered the sintering temperature from 1050 °C to 775 °C and improved the relative density from 91% to 97.1%. Outstanding microwave dielectric properties ( ɛ r = 6.39, Qf = 71,024 GHz at 20 GHz and τ f = −85.1 ppm/°C) were achieved at x = 1.0, demonstrating great potential in millimeter-wave communication applications. In addition, the present ceramics demonstrated good chemical compatibility and a well-matched coefficient of thermal expansion with silver electrodes. Finite element simulations further revealed significantly reduced thermal stress when employing the present ceramics as substrates, highlighting the strong potential for high-reliability low temperature co-fired ceramic (LTCC) applications.
研究领域:
材料科学
·
陶瓷材料
·
微波工程
·
电子封装
·
固体物理
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 5
·2263-2274
·
IF 2.2
Shan Yiting,Yang Chengyu,Lu Yang,Li Junkai,Guo Xiang,Zhou Hongqing
The (1− x )CaO-B 2 O 3 -SiO 2 (CBS)/ x Mg 2 SiO 4 composites were prepared and the influence of CBS crystallizable glass content on the sintering properties, dielectric properties, and thermal properties of the composites were investigated. The primary crystal phases in the CBS/Mg 2 SiO 4 composites were CaMgSi 2 O 6 and CaB 2 O 4 . An appropriate amount of Mg 2 SiO 4 reduced the crystallization temperature of the composite. For x = 0.30, a sintering temperature of 890°C with a holding time of 60 min resulted in a bulk density of 2.645 g/cm 3 , dielectric constant of 6.6, and dielectric loss of 2.54 × 10 −3 at 10 kHz. Prolonged holding time promotes grain growth; when extended from 60 min to 180 min for x = 0.30, the permittivity increased from 6.5 to 6.6 and Q × f increased from 10,100 GHz to 15,700 GHz when x = 0.30 at 13 GHz. The CTE of 70 wt.% CBS + 30 wt.% Mg 2 SiO 4 composite was 9.5 ppm/°C, which approached the value of a circuit board for a ceramic ball grid array package (CBGA).
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Huaicheng Xiang,Yuheng Zhang,Junqi Chen,Yang Zhou,Ying Tang,Jinwu Chen,Liang Fang
Bi 1– x Ho x VO 4 (0.1 ≤ x ≤ 0.9) ceramics were prepared via a solid-state reaction method, and all the ceramics could be well densified in the 920–980 °C range. The ceramics with 0.1 ≤ x < 0.4 were composed of both monoclinic scheelite (M) and tetragonal zircon (T) phases, and a single M phase could be obtained in the range of x ≥ 0.4. The measured ε r decreased from 58.9 ( x = 0.1) to 14.7 ( x = 0.9), so do the calculated values ( ε r(C − M) = 34.3–12.1), and the main reason for ε r > ε r(C − M) was the rattling of Ho 3+ in the dodecahedron. Two points with zero τ f appeared in Bi 1 – x Ho x VO 4 (0 ≤ x ≤ 1) ceramics, and the best microwave dielectric properties with ε r = 16.6, Q × f = 18,400 GHz ( f = 10.69 GHz), and τ f = +3.29 ppm/°C were obtained in the Bi 0.2 Ho 0.8 VO 4 ceramic. The change in temperature coefficient of ionic polarizability ( τ αm ) caused by the rattling effect of cations is the physical essence that affects τ f . Therefore, the rattling effect can be used as an effective mechanism to regulate τ f in low- ε r materials. Furthermore, there was no chemical reaction between Bi 1 – x Ho x VO 4 and Ag electrode, which indicates potential applications in low-temperature co-fired ceramic (LTCC) technology.
研究领域:
材料科学
·
电子材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Juan Xi,Fei Shang,Fei Liu,Jiwen Xu,Guohua Chen
An ultra-low permittivity Li 2 O-added CuO-ZnO-B 2 O 3 multiphase ceramic was fabricated by means of sintering technique, and the phase compositions, microstructures and dielectric properties were investigated. Specimens can be sintered below 800 °C. All the sintered samples consist of Zn(BO 2 ) 2 and CuB 2 O 4 . The variations in the microstructure and dielectric properties of borate ceramics samples were relied on the sintering temperature . The ceramic sintered at 785 °C for 2 h exhibits excellent dielectric properties of ϵ r = 2.86, Q × f = 38093 GHz (~16.0 GHz), τ ƒ = -2.17 ppm/°C, which indicates that the ceramic is a promising candidate for LTCC applications.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 35
·1-9
·
IF 2.8
Huang Yichan,Liu Cheng,Liu Kui,Zhang Dainan,Li Yuanxun,Zhang Huaiwu
Li 3 Mg 4 NbO 8 ceramics with x wt% of Li 2 O–MgO–ZnO–B 2 O 3 –SiO 2 glass (Li 3 Mg 4 NbO 8 -LMZBS x , x = 0.5, 1.0, 1.5, 2.0, 4.0) were prepared by the traditional solid-state reaction method. Rietveld refinement and Raman spectra were adopted for crystal structure studies. Based on the experimental results, it is suggested that the permittivity ( ε r ) and the quality factor ( Q × f ) were mainly associated with the extrinsic factors; while the temperature coefficient of resonant frequency (τ f ) was inversely proportional to the octahedral distortion of Li–O bond and directly proportional to the octahedral distortion of Nb–O bond. Among all the specimens, the sample of x = 1.5 sintered at 950 °C for 5 h exhibited excellent microwave dielectric properties: ε r = 14.16 , Q × f = 109,704 GHz (at 9.6 GHz), τ f = − 31 ± 1 ppm/°C. In addition, good chemical compatibility between the ceramic matrix and Ag electrode also suggested that the Li 3 Mg 4 NbO 8 -LMZBS x ceramic system is potential for low temperature co-fired ceramics (LTCC) applications.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Chaoyu Liang,Jin Huang,Hongxiao Gong,Dongqiao Bai,Yunna Pu,Jianjun Wang,Pengbing Zhao
Several material systems are available for low-temperature co-fired ceramics, and to achieve more efficient designs and applications using additive manufacturing (AM) techniques such as material jetting, the predictability of the dielectric constant of the sintered structure will significantly reduce the consumption of material development. In this work, the LTCC part was fabricated by 3D material jetting using silica-borosilicate glass LTCC ink and densified at 850°C. The borosilicate glass composition was derived from nanopowders prepared by radio frequency plasma spheronisation and configured as surface-grafted glass sols. Scanning electron microscopy results showed that silica particles were embedded in the glass matrix by a liquid phase sintering mechanism accompanied by several confined pores that were difficult to remove. A dielectric constant of around 3.78 was tested from room temperature to 100°C. Molecular dynamics sintering simulation was used to create sintered structures that matched the experimental values. The dipole moment fluctuation of the silica/glass bulk was counted to obtain an accurate value of the dielectric constant, and then the Bruggeman model based on the effective medium theory predicted the dielectric constant of the sintered body, with a prediction of 3.65, which is within 4 % difference from the measured value (3.78). The dielectric constant was predicted for different ceramic/glass compositions and sintering temperatures and found that 35 wt% and 60 wt% should be the upper and lower bounds for borosilicate glass additions to satisfy a stable structure with a relatively low dielectric constant range (3.38–4.42). In conclusion, an effective molecular dynamics approach to predict the dielectric constant of sintered bodies was developed to assist material design in LTCC AM fabrication.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Pengfei Wei,Cen Qian,Luchao Ren
This study demonstrates the successful synthesis of (1- x )MgGa 2 O 4 - x LiF ( x = 0.1–0.4, mass fraction) ceramics via solid-state reaction, achieving a significant reduction in sintering temperature from 1410 to 850 °C. The XRD and Raman testing results showed the formation of a new phase of LiGaO 2 , which affected the dielectric properties. Variations in the sintering density and ionic polarizability cause changes in the permittivity. In addition, the packing fraction analysis of MgGa 2 O 4 , which influences the crystal structure stability, elucidates the intrinsic mechanisms affecting the dielectric loss. The composite effect makes the τ f value of the ceramic shift toward the negative value, owing to the large negative frequency temperature coefficient of LiF. Finally, (1- x )MgGa 2 O 4 - x LiF ( x = 0.3) sintered at 850 °C possesses the superior dielectric properties: ε r = 9.45, Q × f = 32,790 GHz, τ f = −28.5 ppm/°C (at 14 GHz). In addition, (1- x )MgGa 2 O 4 - x LiF ( x = 0.3) ceramics exhibit good cofiring compatibility with Ag electrodes promoting the ceramic to be a suitable candidate for LTCC applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Hui Qiao,Zhihan Zhang,Yihang Li,Linzhuang Xing,Hongyu Yang,Zhimin Li
In the present study, Li 2 O-B 2 O 3 -SiO 2 (LBS) glass served as a low-melting-point flux to investigate the sintering behavior at reduced temperatures and microwave dielectric performance of Li 4 SrCaSi 1.98 Sn 0.02 O 8 ceramics. X-ray diffraction (XRD) along with Raman spectra examinations verified that the LSCS-S structure remained intact upon LBS glass addition and did not result in the formation of new phases. SEM images show that the addition of LBS enables the ceramic to maintain high sintering density even at 850 °C, while reducing its sintering temperature and maintaining an elevated quality factor ( Q × f ). When 1.0 wt% LBS glass is added, at 850 °C the ceramic exhibits excellent dielectric characteristics: ε r = 8.32, Q×f = 41,567 GHz. The as-prepared ceramic materials are promising candidates for low-temperature co-fired ceramic (LTCC) practical utilization.
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DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 9
·2731
·
IF 3.5
Shao-Pu Jiang,Chang-Lai Yuan,Wei Liu,Lin Li,Huan Li,Jing-Tai Zhao
In order to meet the demand for high-frequency current sensors in 5G communication and new energy fields, there is an urgent need to develop high-performance nickel-zinc ferrite-based co-fired ceramic magnetic cores. In this study, a nickel-zinc ferrite core based on low temperature co-fired ceramic (LTCC) technology was developed. The regulation mechanism of BaCo0.06Bi0.94O3doping on the low-temperature sintering characteristics of NiZn ferrites was systematically investigated. The results show that the introduction of BaCo0.06Bi0.94O3reduces the sintering temperature to 900 °C and significantly improves the density and grain uniformity of ceramics. When the doping amount is 0.75 wt%, the sample exhibits the lowest coercivity of 35.61 Oe and the following optimal soft magnetic properties: initial permeability of 73.74 (at a frequency of 1 MHz) and quality factor of 19.64 (at a frequency of 1 MHz). The highest saturation magnetization reaches 66.07 emu/g at 1 wt% doping. The results show that BaCo0.06Bi0.94O3doping can regulate the grain boundary liquid phase distribution and modulate the magnetocrystalline anisotropy, which provides an experimental basis and optimization strategy for the application of LTCC technology in high-frequency current sensors.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 2
·999-1003
·
IF 2.019
Pan H. L.,Liu M. T.,Li M. F.,Ling F.,Wu H. T.
Li 6 Mg 7 Ti 3 O 16 ceramics were prepared by the conventional solid-state method with 1–5 wt% LiF as the sintering aid. Effects of LiF additions on the phase compositions, sintering characteristics, micro-structures and microwave dielectric properties of Li 6 Mg 7 Ti 3 O 16 ceramics were investigated. The LiF addition could effectively lower the sintering temperature of Li 6 Mg 7 Ti 3 O 16 ceramics from 1550 to 900 °C. For different LiF-doped compositions, the optimum dielectric permittivity ( ε
r
) and quality factor ( Q · f ) values first increased and then decreased with the increase of LiF contents, whereas the temperature coefficient of resonant frequency ( τ
f
) fluctuated between − 14.39 and − 8.21 ppm/°C. Typically, Li 6 Mg 7 Ti 3 O 16 ceramics with 4 wt% LiF sintered at 900 °C exhibited excellent microwave dielectric properties of ε
r
= 16.17, Q · f = 80,921 GHz and τ
f
= − 8.21 ppm/°C, which are promising materials for the low temperature co-fired ceramics applications.
研究领域:
材料科学
·
无机非金属材料
·
电子陶瓷
·
介电材料
·
低温共烧陶瓷技术
·
固体化学
·
功能材料
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 6
·413
·
IF 3.2
Wang Yating,Pan Yunchen,Wu Jiajun,Tong Jianxi,Zhang Qilong
A series of novel glass–ceramic/ceramic composites, composed of a low softening ZnO–B 2 O 3 –SiO 2 (ZBS) glass–ceramic and SiO 2 /ZrO 2 ceramics, were fabricated for low temperature co-fired ceramic (LTCC) applications. The effects of the ZrO 2 /SiO 2 mass ratio on sintering behavior, microstructure, crystallization behavior and resultant properties of the ZBS/SiO 2 /ZrO 2 (ZSZ) composites were systematically investigated. The results indicate that the major crystalline phase Zn 2 SiO 4 remained stable with increasing ZrO 2 /SiO 2 mass ratio, while a minor ZrSiO 4 phase precipitated. Variations in the Zn 2 SiO 4 /ZrSiO 4 phase content resulted in an increase in the coefficient of thermal expansion (CTE) value from 2.75 × 10 –6 /K to 3.81 × 10 –6 /K, alongside a rise in flexural strength from 120.8 MPa to 152.3 MPa. The optimal properties were achieved in the ZSZ composite with a ZrO 2 /SiO 2 mass ratio = 4:5, sintered at 900 °C for 30 min: \({\varepsilon }_{r}\) = 5.52, tan δ = 6.92 × 10 –4 , CTE = 3.81 × 10 –6 /K, flexural strength (152.3 MPa) and excellent compatibility with Ag electrodes.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Sen Peng,Lei Xiao,Yingxiang Li,Lianwen Deng,Jiahui Zhu,Zhenjun Qing,Yecheng Xi
A novel Ba 3 (ZnB 5 O 10 )PO 4 (BZBPO) phosphate ceramic was synthesised using a conventional solid-state technology. The BZBPO ceramic sintered at 850 °C demonstrated exceptional microwave dielectric properties : ε r = 5.88 ± 0.08, Q×f = 52,896 ± 1200 GHz ( f 0 = 16.5 GHz) and τ f = 0.34 ± 0.25 ppm/°C. Raman spectroscopy revealed that ε r and Q×f were negatively correlated with the Raman shift and full width at half maximum of the BZBPO ceramic, respectively. Meanwhile, Phillips–Vechten–Levine theory revealed that Q×f was highly correlated with the lattice energy ( U b ), and τ f was closely related to the bond energy ( E b ) and the thermal expansion coefficient. Among contribution ratios of individual chemical bonds, the B–O bond mainly contributed to U b , E b and ionicity, proving that the bond dominantly affected the dielectric properties of the BZBPO ceramic. Finally, the BZBPO ceramic was co-fired with silver, demonstrating its potential applicability towards low temperature co-fired ceramic technology.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）