JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Shuquan Yang,Lan Zhang,Meihui Xiao,Lin Chen,Jun Sun,Jianjun Ding,Xiaoxiao Li,Yi Gong,Kang Zheng,Xian Zhang,Xingyou Tian
Microwave devices with reduced dielectric loss and electronic components with increased integration density necessitate the higher performance of electronic packaging materials. The h-BN/AlN/CaCO 3 -MgO-B 2 O 3 -SiO 2 -Li 2 CO 3 glass composites were prepared via tape-casting and then sintered by pressureless and hot-pressing, respectively. The thermal conductivity of pressureless sintered composite was increased to 6.55 W/(m·K) by incorporating 3 wt% h-BN, and the thermal expansion of 4.47 ppm/K was achieved along with low dielectric constant of 5.76 and dielectric loss of 7.02 × 10 −4 at 24 GHz. In contrast, the hot-pressing sintered composite containing 4 wt% h-BN exhibited higher thermal conductivity of 10.3 W/(m·K) and lower dielectric loss of 4.77 × 10 −4 . The microstructure characterization indicated the construction of heat conduction networks, and XRD analysis illustrated the formation of crystallization in the glass. Such low-temperature co-fired ceramic (LTCC) with high thermal conductivity and low dielectric loss would be a promising candidate for electronic packaging and 5G communication applications.
研究领域:
材料科学
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电子工程
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陶瓷工程
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通信技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 21
·34195-34202
·
IF 5.6
Zelai Cheng,Xi wang,Mingshan Qu,Xiuling Yang,Xian Jian,Hua Su
With the advent of fifth-generation technology, high-performance microwave dielectric materials with low dielectric constant are urgently needed to enable the miniaturization and integration of communication devices. This study presents the synthesis and characterization of a composite comprising SrCu 0.95 Mn 0.05 Si 4 O 10 (SCSMn) and Ba 3 V 2 O 8 (BV) ceramics, designed for LTCC applications. In a solid-state reaction method, the composition of the synthesized composite was tailored to adjust the τ f value and lower the sintering temperature . The results indicate that the composition of 47.5 wt% SCSMn and 52.5 wt% BV sintered at 925 °C exhibits optimal microwave dielectric properties , including ε r of 8.86, a Q × f of 33860 GHz, and a τ f of 3 ppm/°C. Microstructural analysis revealed that interionic diffusion during sintering induced amorphous phase formation and an increased concentration of defect-associated Cu + and V 5+ species. Concomitant modifications in bond valence summation (BVS) parameters and global instability index (GII) values within the composite ceramics were observed, which collectively account for the discrepancies between theoretical predictions and experimental dielectric properties . The composite material also demonstrated excellent impedance matching and radiation performance when utilized as a substrate for simulating a slot-coupled antenna, validating its promising potential for LTCC applications .
研究领域:
材料科学
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微波工程
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陶瓷与复合材料
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电子材料
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低温共烧陶瓷(LTCC)
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zelai Cheng,Xingyu Huo,Zhen Zhao,Feng Qiao,Xiuling Yang,Ying Chen,Mingshan Qu,Hua Su
This work presents a miniaturization strategy for ferrite circulators by enhancing the dielectric constant ε r of NiCuZn ferrites and LTCC technology. Highly polarizable Cu 2+ and Ti 4+ substitutions for Ni 2+ and Fe 3+ increase dielectric constant, while non-magnetic Ti 4+ reduces magnetocrystalline anisotropy and narrows ferromagnetic resonance linewidth ΔH , with Cu 2+ concurrently lowering sintering temperatures. In the Ni 0.42-x/2 Cu 0.18+x Zn 0.4 Ti x/2 Fe 1.98-x O 4-δ system, the x = 0.1 composition (sintered at 975 °C) achieves minimal ΔH (82 Oe), ε r ≈ 14.6, and 4π M s ≈ 4219 G, whereas x = 0.6 (sintered at 925 °C) balances ε r ≈ 20.8 with magnetic performance ( ΔH ≈167 Oe, 4π M s ≈ 2117 G), confirming LTCC compatibility. A heterostructured substrate fabricated by co-firing Ni 0.12 Cu 0.78 Zn 0.4 Ti 0.3 Fe 1.38 O 4-δ ferrite (x = 0.6) with a microwave dielectric (50 wt.% SrCu 0.95 Mn 0.05 Si 4 O 10 + 50 wt.% Sr 3 V 2 O 8 ) exhibits controlled interfacial diffusion. HFSS simulations demonstrate that the integrated circulator-filter achieves significant miniaturization with >30 dB harmonic suppression (14-24 GHz) while maintaining in-band performance (| S 21 | < 1 dB, | S 11 | and | S 12 | < -20 dB at 7-12 GHz). The validates high- ε r NiCuZn ferrites and LTCC composite substrates for compact multifunctional microwave components.
研究领域:
微波工程
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材料科学
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电磁学
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铁氧体技术
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集成电路设计
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陶瓷工艺
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liu Yunan,Fu Renli,Lu Ran,Shen Minhao,Hu Yunjia,Bei Guoping
Low Temperature Co-Fired Ceramic (LTCC) substrates used for microwave circuits typically must have low dielectric loss and low permittivity, as well as the ability to co-fire with metals. The dielectric properties of the microcrystalline glass materials used as the LTCC substrates are closely related to the crystallization process during sintering. This study focuses on the crystallization process of CaO-B 2 O 3 -SiO 2 microcrystalline glass. Wollastonite and pseudowollastonite seeds were used to control the degree of crystal precipitation. The phase composition and microstructure of each sample were analyzed in detail to elucidate the changes in the dielectric properties and sintering performance of the material. The addition of crystal seeds as nucleation sites promoted crystallization and led to the formation of quartz crystals. The sintered samples exhibited excellent dielectric properties: ε r < 4 at 18 GHz, tan δ < 0.0015, and Q × f > 12000 GHz. They have great potential as high-performance LTCC substrates.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xinran Ji,Chang Shen,Ye Zhao,Hui Zheng,Qiong Wu,Qiangyuan Zhang,Liang Zheng,Peng Zheng,Yang Zhang
NiCuZn ferrite is a material suitable for low-temperature co-fired ceramic (LTCC) technology due to its high permeability and relatively low sintering temperature . The main research questions regarding NiCuZn ferrites are focused on reducing the sintering temperature of the NiCuZn ferrites to achieve compatibility with the Ag electrodes and improve their electromagnetic properties. In this study, the electromagnetic properties of NiCuZn (Ni 0.29 Cu 0.14 Zn 0.60 Fe 1.94 O 3.94 ) ferrites were enhanced by doping with Bi 2 O 3 , resulting in a reduction of the sintering temperature to 925 °C. The findings show that a suitable concentration of Bi 2 O 3 doping could promote the growth of grains and result in NiCuZn ferrites with denser microstructures sintered at a low temperature. Furthermore, adding 0.30 wt% Bi 2 O 3 to NiCuZn ferrite enhances its electromagnetic properties, such as a high real part of permeability (∼937.6 @ 1 MHz), high saturation magnetization (∼60.353 emu/g), low coercivity (∼0.265 kA/m), and excellent dielectric constant (∼14.71 @ 1 MHz). In addition, the chemically compatible Ag electrodes suggest that the NiCuZn +0.30 wt% Bi 2 O 3 ceramics may be acceptable for LTCC technology.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhenjun Qing,An Liu,Shumin Duan,Haiyan Li,Yan Xue
Li 5 Mg 3 Ti 2 O 9 F (LMTOF) ceramic was successfully synthesized using the solid-state reaction method at a temperature of 925 °C. XRD analysis revealed the presence of a unique cubic structure, resulting in the formation of a solid solution of Li 5 Mg 3 Ti 2 O 9 F. Notably, a significant correlation was observed between the ions polarization and the ε r of the LMTOF ceramic. Furthermore, the impact of sintering temperature on the ε r and Q × f value of the ceramic was primarily evidenced by changes in the sintered density. Applying the P–V-L theory, computational results highlighted the crucial role played by the ionicity of Mg–O/F and Ti–O/F in determining the behavior of the LMTOF ceramic. Particularly, the lattice energy associated with the Ti–O/F bond exerted a predominant influence on the Q × f value, while the bond energy of Li–O/F exhibited a greater impact on the τ f . Additionally, insightful details regarding the lattice vibrations of the ceramic were obtained through Raman spectroscopy. Impressively, the ceramic sintered at 925 °C exhibited exceptional microwave dielectric performance, demonstrating an ε r of 14.8, a Q × f value of 98,500 GHz, and a τ f of −15.6 ppm/°C. These outcomes underscore the significant potential of LMTOF ceramic for advancements in the LTCC field.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
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IF 5.302
Ying Tang,Huan Li,Jie Li,Weishuang Fang,Yang Yang,Zhiyuan Zhang,Liang Fang
Ca 3- x Mg 1+ x LiV 3 O 12 (0 ≤ x ≤ 1) ceramics with cubic-garnet-structure were synthesized by the solid-phase reaction. The replacement of Ca 2+ with the smaller Mg 2+ exerted an increasingly strong “rattling” effect at the A-site of Ca 3- x Mg 1+ x LiV 3 O 12 . With increased Mg 2+ , ε r increased from 10.5 ± 0.1 to 15.4 ± 0.1 and ε corr increased from 11.0 ± 0.1 to 16.0 ± 0.1, whereas the theoretical ε th decreased from 12.0 ± 0.1 to 10.5 ± 0.1. ε corr was higher than ε th due to the “rattling” effect. The enhanced “rattling” effect caused τ f to increase rapidly from –64.1 ± 1.0 ppm/°C to +267.2 ± 1.0 ppm/°C. With increased x , Q × f decreased from 74,700 ± 500 GHz to 15,370 ± 500 GHz, due to the decreased packing fraction, increased FWHM of the A 1g modes, and enhanced “rattling” effect. Additionally, the chemical compatibility between Ca 2.75 Mg 1.25 LiV 3 O 12 and Ag electrodes was confirmed, indicating this material’s potential for LTCC .
研究领域:
材料科学
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物理学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 28
·1-11
·
IF 2.8
Xia Junjia,Ma Xing-Hua,Zhang Zhenlu,Nahm Sahn,Zhang Shuling,Ma Xingyi,Guo Feng
In this work, ZnGa 2– x O 4–1.5 x (0.0 ≤ x ≤ 0.15) ceramics were synthesized by a solid-state reaction method. ZnGa 2 O 4 ceramic that is sintered at 1300 °C/3 h exhibits good microwave dielectric properties with ε r of 11.06, Q × f of 74,730 GHz, and τ f of − 69.7 ppm/°C. However, it cannot be fully densified at temperatures lower than 960 °C, even when a large amount of B 2 O 3 is added, which seriously inhibits its application in the LTCC (low temperature cofired ceramic) field. Therefore, adding B 2 O 3 to Ga 2 O 3 -deficient ZnGa 2 O 4 ceramics is proposed to decrease the sintering temperature to below 960 °C. Owing to the dual effect of the B 2 O 3 -rich and ZnO-B 2 O 3 related liquid phases, ceramics with added B 2 O 3 (≥ 20 mol%) were found to sinter well at 950 °C, and good microwave dielectric properties were also achieved. In particular, 25 mol% B 2 O 3 added to ZnGa 1.95 O 3.925 ceramic sintered at 950 °C showed promising microwave dielectric properties for 5 G/6 G technologies without reaction with a silver electrode: ε r = 9.19, Q × f = 37,337 GHz, and τ f = − 58.3 ppm/°C.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 3
·1-7
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IF 2.8
Luo Zhenli,Cai Yiyang,Yin Changzhi,Cheng Mingfei,Lei Weicheng,Lu Wenzhong,Song Xiaoqiang,Lei Wen
A novel BaMgSi 4 O 10 ceramic was fabricated using a conventional solid-state method. The BaMgSi 4 O 10 accompanied with BaMgSiO 5 , Ba 2 MgSi 2 O 7 , and SiO 2 was detected for all compositions. Furthermore, microwave dielectric properties with ε r = 5.7 , Q × f = 17,900 GHz, and τ f = − 19.1 ppm/°C were obtained at 1100 °C. To meet the requirement of LTCC technology, the optimum temperature can be lower than 850 °C by composing with 2 wt% LMS glass with a short soaking time of 0.5 h. A patch antenna was fabricated using BaMgSi 4 O 10 -2 wt% LMS as the substrate with a bandwidth of 120 MHz at 4.12 GHz. All result indicates BaMgSi 4 O 10 -2 wt% LMS ceramic has large application prospect in wireless communication systems.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Houlin Hu,Yao Wang,Chaoyang Cai,Pengcheng Zhang,Xiaoqing Chen,Rui Xiang,Hao Li
A novel low-temperature fired BaMnV 2 O 7 ceramic was fabricated with solid-state reaction. Rietveld refinements based on X-ray diffraction data and TEM analysis indicated that BaMnV 2 O 7 exhibited a monoclinic structure with a P21/n space group. The dense microstructure of the BaMnV 2 O 7 ceramic obtained at 850 °C was examined by scanning electron microscopy. The increasing content of V 4+ affected the quality factor, which was confirmed by X-ray photoelectron spectroscopy. The intrinsic dielectric properties were obtained from far infrared reflectivity spectra. Additionally, the BaMnV 2 O 7 ceramic showed good chemical stability with a Ag electrode and desirable microwave dielectric performance at 850 °C: ϵ r = 11.7, Q × f =20040 GHz and τ f = −48.2 ppm/°C, which can potentially be applied in LTCC technology.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yu Liang,Mingsheng Ma,Faqiang Zhang,Feng Liu,Tan Lu,Zhifu Liu,Yongxiang Li
In the present work, a wireless microfluidic sensor based on low-temperature cofired ceramic (LTCC) technology for real-time detection of metal ions in water is proposed. The wireless sensor is composed of a planar spiral inductor and parallel plate capacitor (LC) resonant antenna, which integrates with the microchannel in the LTCC substrate between the capacitor plates. Aqueous solutions of Pb(NO3)2, Cd(NO3)2, Mg(NO3)2, Ca(NO3)2, NaNO3, and KNO3 with concentrations of 0–100 mM were tested with the sensors. The metal ion and its concentration in water can be tested by the amplitude of the reflection coefficient (S11) and the resonance frequency (fr) of the wireless microfluidic sensor. The metal ion species can be distinguished from the wireless response behavior of the sensor. The detection limit of the sensor for the selected metal ionic solutions could reach as low as 5 μM. The normalized sensitivity of the sensor is 0.47%, which is higher than that of the reported liquid microfluidic sensors based on microwave resonators. The wireless microfluidic sensor of this study is promising for rapid and convenient detection of heavy metal ion pollutants in the industrial wastewater.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 10
·5110-5119
·
IF 3.784
Xiaoqing Chen,Hao Li,Pengcheng Zhang,Houlin Hu,Yu Tao,Gaosheng Li
A low-firing SrZnV 2 O 7 ceramic was synthesized via a traditional solid-state sintering route. The phase formation, grain morphology, and dielectric performance were studied in detail. Rietveld refinements based on XRD data revealed that SrZnV 2 O 7 crystallized in the monoclinic space group P2 1 /n, which was further confirmed by TEM analysis. The dense SrZnV 2 O 7 ceramic with an ε r of 11.28, a Qf of 56 660 GHz, and a τ f of −27.2 ppm/°C was yielded at a low sintering temperature of 740°C for 4 h. Its chemical compatibility with Ag was verified via XRD and SEM-EDS analysis, which rendered SrZnV 2 O 7 a prospective candidate for LTCC technology.
研究领域:
材料科学
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陶瓷工程
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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）