JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 11
·7352-7363
·
IF 3.5
Shengtai Zhang,Zhen Teng,Linzhen Wu,Yongqiang Tan,Chen Chen,Xiaosong Zhou
Designing waste forms using the cocktail effect of high-entropy ceramics can improve the efficiency of ceramic waste forms. In this work, traditional garnet (Y 1.2 Nd 1.8 Fe 5 O 12 , YIG) and high-entropy (HE) garnet (Y 0.6 Gd 0.6 Sm 0.6 Eu 0.6 Dy 0 . 6 Fe 5 O 12 , HEG) are synthesized through ignition and plasma sintering to form dense ceramic waste forms. The chemical stability of YIG and HEG was studied by using static leaching tests at pH = 3, 5, 7, 9, 11. The results indicate that acidic environments can increase the leaching rate of ceramics. Leaching behavior leads to a decrease in lattice volume, but the elements remain uniformly distributed. The leaching mechanism indicates that YIG and HEG are controlled by dissolution and surface effect in the early stage (1–7 days) of leaching. The leaching mechanism in the later stage (14–42 days) is characterized by diffusion control. The diffusion coefficient of long-term leaching indicates that HEG is more suitable as the immobilization substrate for high-level radioactive waste (HLW) than YIG.
研究领域:
材料科学
·
核废物管理
✓ 已验证
DOI
高影响因子
Magnetochemistry
·
2021
·Vol. 7
·期 5
·56
·
IF 2.193
Yimin Yang,Xiaoying Li,Ziyu Liu,Dianjun Hu,Xin Liu,Penghui Chen,Feng Tian,Danyang Zhu,Lixuan Zhang,Jiang Li
Nanoparticles prepared by the coprecipitation method were used as raw materials to fabricate Y3Fe5O12(YIG) ceramics by air pressureless sintering. The synthesized YIG precursor was calcinated at 900–1100 °C for 4 h in air. The influences of the calcination temperature on the phase and morphology of the nanopowders were investigated in detail. The powders calcined at 1000–1100 °C retained the pure YIG phase. YIG ceramics were fabricated by sintering at 1200–1400 °C for 10 h, and its densification behavior was studied. YIG ceramics prepared by air sintering at 1250 °C from powders calcinated at 1000 °C have the highest in-line transmittance in the range of 1000-3000 nm. When the sintering temperature exceeds 1300 °C, the secondary phase appears in the YIG ceramics, which may be due to the loss of oxygen during the high-temperature sintering process, resulting in the conversion of Fe3+into Fe2+.
研究领域:
材料科学
·
陶瓷工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Wenjing Zhao,Fu Wang,Jingsong Liu,Lijia Cao,Xu Huang,Fei Yang,Chong Xian,Honglan Yuan
A YIG-MCT composite substrate for circulators with high shear strength and good dielectric properties was prepared by direct co-firing. The Bi 0.3 Y 2.3 Ca 0.4 Zr 0.4 Fe 4.6 O 12 (B-YIG) ceramic acted as the inner core, and the 0.95MgTiO 3 -0.05CaTiO 3 (95MCT) ceramic acted as the outer ring of the co-fired composite substrate. The influence of co-firing temperatures on the phase composition, microstructure, shear strength and dielectric properties of the as-prepared composite substrate was investigated. Moreover, the transition region of the composite substrate, induced by direct cosintering, was deduced. The results show that the optimal co-firing temperature of the composite substrate is 1280 °C. At the co-firing temperature, the obtained composite substrate shows a high shear strength of 64.20 MPa. New phases, such as MgFe 2 O 4 , Y 2 Ti 2 O 7 , and YFeO 3, form in the transition region because of the interface reaction occurring between B-YIG and 95MCT. The synthesized YIG-MCT composite substrate shows a dielectric constant of 19.7 and a dielectric loss of 5.64 × 10 −4 (9 GHz), demonstrating good dielectric properties. The results indicate that YIG-MCT prepared by co-firing technology is a promising composite substrate for circulator applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Manufacturing Processes
·
2021
·
IF 5.01
Qianqian Chen,Tiesong Lin,Jiujie Xu,Wenhang Niu,Panpan Lin,Peng He
Bismuth composite glasses doped with Fe 2 O 3 nanoparticles were utilized to braze yttrium iron garnet (YIG) ferrite. The effect of Fe 2 O 3 doping on the thermal property and structure of the composite glasses was studied. The microstructure, mechanical and dielectric properties of YIG/YIG joint were systematically investigated as well. The Fe 2 O 3 doping promoted the crystallization of Bi 2 SiO 5 and the conversion of [BO 4 ] units to [BO 3 ] units. [BO 3 ]/[BO 4 ] in the glass matrix reacted with Y 3+ and Fe 3+ diffusing from YIG base material to form Fe 2 O 3 blocks and lamellar YBO 3 . The gray YBO 3 changed from lamellar phase to needle-like phase with the brazing temperature increasing. The concentration of Fe 3+ increased along with the dissolution of Fe 2 O 3 nanoparticles, resulting in the extensive formation of Fe 2 O 3 nuclei. Consequently, the amount of the Fe 2 O 3 blocks increased with the Fe 2 O 3 doping increasing. The shear strength could reach 68.4 MPa via the combined strengthening of block Fe 2 O 3 and gray YBO 3 phases. The dielectric constant of YIG/YIG joint decreased with the Fe 2 O 3 doping and brazing temperature increasing due to the growth of Fe 2 O 3 and YBO 3 phases. The dielectric loss tangent of the YIG/YIG joint was close to that of the original YIG material with the frequency increasing.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhihui Xu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
In this study, nano-sized La-doped YIG (Y 3-x La x Fe 5 O 12 , x = 0.00, 0.03, 0.05, 0.08, 0.10, and 0.15) were prepared using a reverse co-precipitation method, which were then combined with FeSiCr powder to create a novel FeSiCr/Y 3-x La x Fe 5 O 12 soft magnetic composite (SMC). X-ray Diffraction (XRD) analysis confirmed the successful incorporation of La into the YIG lattice. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) scans demonstrated that a uniform insulating layer of La-doped YIG was effectively coated on the FeSiCr particles. The results revealed that the Y 2.92 La 0.08 Fe 5 O 12 powders showed the highest M s of 22.334 emu/g. Furthermore, the FeSiCr/Y 3-x La x Fe 5 O 12 SMCs exhibited notable improvements both in permeability and core loss with a La doping concentration of x = 0.08 ( P cv = 122.35 mW/cm 3 , μ e = 51.034 at 10 mT and 500 kHz), accompanied by an enhancement of DC bias characteristics. This work optimized the magnetic properties of YIG with La doping and constructed a novel FeSiCr/La-doped YIG SMCs with enhanced high-frequency performance.
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wanjiao Li,Jing Li,Xiaoling Peng,Jiaxin Xu,Yanting Yang,Dingfeng Jin,Hongxiao Jin,Xinqing Wang,Hongliang Ge
In this study, single-phase yttrium iron garnet (YIG) ferrite was synthesized by sol-gel method, which was firstly used as the insulating layer to prepare Fe/YIG soft magnetic composites (SMCs). It was demonstrated that the Fe powders were uniformly coated with the YIG ferrite for the Fe/YIG SMCs. The influence of the YIG content on the soft magnetic properties of the Fe/YIG SMCs were investigated in detail, the results showed that the total core loss ( P cv ) of all Fe/YIG SMCs were smaller than pure Fe. The P cv firstly decreased with increase of the YIG content up to 1.0 wt% ( P cv = 2460 mW/cm 3 , 4 mT/590 kHz), then increased with the increase of YIG from 1.0 wt% to 5.0 wt%. What’s more, the effective permeability ( μ e ) of the Fe/YIG SMCs with YIG from 1.0 wt% to 3.0 wt% were higher than that of Fe, confirming both decreased core loss and improved permeability were accomplished in the Fe/YIG SMCs, which demonstrated that the YIG ferrite has good application prospects as new coating layer for SMCs used in medium to high frequency environments.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Pingan Tan,Xiaoyan Zhong,Jingsong Liu,Fei Yang,Chong Xian,Honglan Yuan
Ni 0.6 Zn 0.4 Fe 2 O 4 (NZF-Zn 0.4 ) ferrites with different Al–Si–B–Pb (ASBP) glass additions were synthesized via a solid-phase reaction method at 1175 °C. The inclusion of ASBP-glass significantly enhances the grain size, density, shrinkage, and magnetic properties of NZF-Zn 0.4 ferrites without introducing impurity phases. The prepared NZF-Zn 0.4 -1 wt%ASBP ferrites not only exhibit appropriate radial shrinkage but also possess a dense microstructure and outstanding magnetic properties. Subsequently, Y 2.4 Bi 0.5 Al 0.1 Fe 3 O 4 (YIG-Al 0.1 ) ferrites and NZF-Zn 0.4 -1 wt%ASBP ferrites were chosen as the outer rings and inner cores, respectively. Tightly interconnected YIG-Al 0.1 /NZF-Zn 0.4 –1wt.% ASBP ferrite composite substrates were successfully co-fired within the temperature range of 1175 °C–1225 °C following co-pressing. Furthermore, YIG-Al 0.1 /NZF-Zn 0.4 -1 wt%ASBP composite substrates, co-fired at 1175 °C, exhibit a lack of impurity phases in the interface region, minimal element diffusion, and exceptional electromagnetic properties (NZF-Zn 0.4 -1 wt%ASBP: M s = 81.88 ± 0.05 emu/g; YIG-Al 0.1 : ε r = 18.28 ± 0.05@11.17 GHz, tanδ = 3.14 ± 0.55 × 10 −4 , M s = 21.62 ± 0.55 emu/g). The wide co-firing temperature range of YIG-Al 0.1 /NZF-Zn 0.4 -1 wt%ASBP composite substrates significantly enhances the shrinkage matching rate of two-phase ferrites, and its exceptional electromagnetic properties hold significant potential for applications in RF band circulators.
研究领域:
材料科学
·
磁性材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Pingan Tan,Xu Huang,Jingsong Liu,Lijia Cao,Fei Yang,Chong Xian,Honglan Yuan
Y 2.5- x Bi 0.5 Al x Fe 5 O 12 (YIG-Al x ) ceramics have been synthesized at 1175 ℃ by the solid-state reaction method. The effects of the co-doped Bi 3+ , Al 3+ ions on the phases, micromorphology, and dielectric and magnetic properties of the yttrium iron garnets (YIG) were investigated. Excessive introduction of Al 3+ ions led to the collapse of the YIG lattice and precipitation of the Bi 3+ and Fe 3+ ions; while moderate Al 3+ doping improved the dielectric properties , but not the saturation magnetization. The YIG-Al 0.2 ceramics proved to have particularly good electromagnetic properties ( ε r = 18.34 ± 0.05@11.19 GHz, tan δ = 3.09 ± 0.55 × 10 −4 , M s = 19.82 ± 0.55 emu/g). Additionally, tightly bonded Y 2.3 Bi 0.5 Al 0.2 Fe 5 O 12 /Ni 0.8 Zn 0.2 Fe 2 O 4 (YIG-Al 0.2 /NZF) composite substrates were prepared by co-firing at 1175 ℃. The composite substrates exhibited superior electromagnetic properties (YIG-Al 0.2 : ε r = 18.37 ± 0.05@11.15 GHz, tan δ = 3.08 ± 0.55 × 10 −4 , M s = 21.09 ± 0.55 emu/g; NZF: M s = 67.5 ± 0.55 emu/g), which were slightly affected by the diffusion of Ni and Zn from the NZF. Our findings show that YIG-Al 0.2 /NZF substrates have great potential for use as RF band circulators.
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
MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Haohua He,Panpan Lin,Tong Wu,Qianrun Zhang,Haodong Li,Ligupan Zhang,Xin Yue,Tiesong Lin,Peng He
In this article, we designed a novel Bi 2 O 3 -B 2 O 3 -BaO-Fe 2 O 3 (BBBF) magnetic glass-ceramic braze with various Fe content to fabricate YIG ferrite. • The network structure, thermal properties, crystallization behavior, magnetism of the glass braze were systemically reported. • YIG/BBBF glass /YIG joints showed desirable mechanical reliability and magnetic performance by controlling the in-situ crystallization of target phase BaFe 12 O 19 . • The highest shear strength of the joints was 62.6 MPa and the maximum of the joints' saturation magnetization intensity was 28.01 emu/g (over 97% of the base material), which is the first time that the magnetic performance of YIG/YIG joint has reached such a level. • We have revealed the regulation mechanism of the target magnetic phases on the magnetic performance of the joints, providing a theoretical basis for further improving the performance of functional device. A new designed Bi 2 O 3 -B 2 O 3 -BaO-Fe 2 O 3 magnetic glass-ceramic braze was developed to fabricate yttrium iron garnet ferrite (YIG) integrated structure. The magnetism level of the glass braze was controlled by in-situ crystallization of magnetic phase BaFe 12 O 19 and transitional phases. The saturation magnetization intensity of the glass brazes reached its maximum of 7.83 emu/g after designed heat-treatment for crystallization. YIG/BBBF glass/YIG joints showed not only outstanding mechanical strength but also desirable magnetic performance. The shear strength of the joints was up to 62.6 MPa, and the saturation magnetization intensity of the joints was up to 97% of YIG base material, which indicated almost no attenuation of the joints' magnetic performance compared with YIG base material. The mechanisms of the target magnetic phase BaFe 12 O 19 on the mechanical and magnetic performance of the joints were deeply elaborated, laying theoretical foundation for the magnetic control of ferrite device joints.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2023
·
IF 2.7
Xuening Han,Jie Li,Hao Wu,Kai Sun,Yixin Chen,Lijun Jia,Huaiwu Zhang,Pengjie Zhang,Chunyang Wu
In this paper, the Bi-In co-substituted YIG ferrite materials composed of Y 3− x Bi x Fe 4.55 In 0.45 O 12 ( x = 0.0–1.0 with a step of 0.2) were synthesized by a conventional solid-state route. Samples with different Bi 3+ ion contents were sintered at different temperatures. The phase formation, microstructure, dielectric and magnetic properties of samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), impedance analyzer, vibrating sample magnetometer (VSM), and ferromagnetic resonance (FMR). The results showed that Bi 3+ ion substitution could reduce the sintering temperature, increase the bulk density ( d b ), improve the dielectric constant ( ε' = 22.26@100 MHz at × = 1.0) and keep a high saturation magnetization ( 4πM S = 1700–1850 Gs), but led to the increase of the FMR linewidth ( ΔH = 316.21 Oe at × = 1.0).
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Xiang,Lijun Jia,Tingqing Cai,Xuening Han,Mingchao Yang,Huaiwu Zhang
To meet high-power microwave system demands, low-temperature sintered Bi-Li-V substituted YIG ferrites were prepared. The experimental results reveal that Bi 3+ , Li + , and V 5+ occupy the c, a, and d sites of the garnet structure, respectively; the full-site distortion reduces the lattice activation energy, significantly reducing the transformation temperature from perovskite to garnet phase. Additionally, a dual structure with a high percentage of fine grains is observed in the substituted samples, which is an important reason for the large increase in spin-wave linewidth. Isothermal thermodynamic analysis indicates that a sintering mechanism dominated by liquid-phase sintering is conducive to the densification of YIG ferrites. Ferromagnetic resonance linewidth decomposition confirms that, due to the simultaneous increase in the saturation magnetization and the magneto-crystalline anisotropy constant, anisotropy-induced linewidth remains almost unchanged; the dense dual structure leads to a significant reduction in porosity-induced linewidth; ultimately, the ferromagnetic resonance linewidth is greatly reduced.
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
·
2025
·
IF 5.6
Bixian Zhang,Kai Yang,Sihao Jian,Bei Ren,Ziqian Meng,Yinghui Tang,Yang Miao
With the rapid advancement of communication technologies toward higher frequencies and miniaturization, microwave devices are imposing increasingly stringent performance requirements on fundamental magnetic materials. Optimizing the saturation magnetization and dielectric constant of ferrite materials can enhance the transmission efficiency and frequency response of microwave devices, thereby meeting the evolving technical requirements. In this study, we synthesized a series of yttrium iron garnet ferrites with the chemical composition Bi 1.4 Ca 0.3 Y 1.3 Zr 0.15 Sn 0.15 In 0.2 Fe 4.5-x O 12-1.5x (0 ≤ x ≤ 0.3) using the conventional solid-state reaction method. The effects of iron deficiency on the structure and electromagnetic properties of these ferrites were systematically investigated. The results demonstrate that controlled iron deficiency effectively enhances saturation magnetization (4πMs) while reducing dielectric loss (tanδ), without altering the garnet phase structure or dielectric constant (ε'). However, excessive iron deficiency induces the formation of a secondary YFeO 3 phase, severely degrading material properties. The sample with x = 0.2 exhibits outstanding comprehensive performance, with a high saturation magnetization (1903 Gs), an elevated dielectric constant (25.2), and a low dielectric loss (4.67 × 10 -3 ). These high-performance ferrite materials show great potential for applications in next-generation microwave devices.
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
危险品化学品经营许可证（带存储）