JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2016
·
IF 2.933
Chaoyang Ma,Fei Tang,Jiangfeng Zhu,Zicheng Wen,Yang Yu,Ke Wang,Miaomiao Du,Jiantao Zhang,Jiaqi Long,Xuanyi Yuan,Wang Guo,Yongge Cao
Composite structures of YAG/1 at% Nd-doped LuAG/YAG, YAG/1 at% Nd-doped LuAG and YAG/5 at% Yb-doped LuAG transparent ceramics were successfully fabricated by non-aqueous tape-casting method and vacuum sintering technology. Cation (Y 3+ , Lu 3+ , Nd 3+ , Yb 3+ ) diffusion behavior across the contact boundaries between ytterbium (Yb) or neodymium (Nd) doped lutetium aluminum garnet (LuAG) and un-doped yttrium aluminum garnet (YAG) was studied by the electron probe X-ray micro-analysis (EPMA). The diffusion concentration profile curves were well modeled by Harrison type B kinetics. Curves of concentration vs depth were well fitted by Fick’s second low and the log of the average concentration varies as 6/5 power of penetration depth in the diffusion range was demonstrated. Meanwhile, the bulk diffusion coefficient and grain boundary diffusion coefficient were calculated. For YAG/Nd:LuAG transparent ceramic, under an 808 nm diode laser pumping, the 1064 nm continuous wave (C.W.) laser output beam with good quality was achieved.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Lv Zhu,Le Zhang,Mingyuan Liu,Guannan Chen,Yifei Cao,Cong Wei,Chunming Zhou,Bingheng Sun,Cen Shao,Jian Kang,Hao Chen,Hao Yang
YAG ceramic fiber is the preferred material for the gain medium of the new generation fiber laser. However, the fabrication of hundred-micron and defect-free YAG ceramic fibers is still the primary challenge. In this paper, YAG ceramic fibers with the diameter of 147 µm and length of 113 mm were successfully batch fabricated by the combination of gelcasting and mold design , and the diameter fluctuation rate was only 1.4%. The solid loading of the slurries (46–54 vol%) were systematically investigated to achieve high density and net-shape forming of green fibers. It was found that the YAG ceramic fiber was highly transparent with the optimized solid loading of 52 vol%, and the transmittance of the YAG ceramic (2 mm thick) at 800 nm was 82.6%. Its bending strength was as high as 1124 ± 86 MPa. The ideas and methods of this study will promote the development of gelcasting in the field of hundred-micron ceramic fibers.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2013
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IF 2.39
Xuewei Ba,Jiang Li,Yubai Pan,Yanping Zeng,Huamin Kou,Wenbin Liu,Jing Liu,Lexiang Wu,Jingkun Guo
Transparent YAG ceramics were prepared by the aqueous and non-aqueous based tape casting methods. The rheological property of the slurries was analyzed by the viscosity–shear rate curves. The thermal character was detected by the TG–DTA analysis. The microstructures of the tapes and ceramics were compared. The influence of density of the tape on the ceramics were discussed. The in-line transmittance curves were compared to analyze the optical quality of obtained samples. Results indicate that the methods mentioned above can achieve transparent YAG ceramics with multilayer structure. The transmittance of the sample prepared by the aqueous tape casting is above 81% at 400 nm and the sample fabricated by the non-aqueous tape casting possesses higher optical properties . The transmittance is higher than 82% at 400 nm and reaches 84% at 1064 nm.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Xinghua Su,Jie Zhou,Ge Bai,Jing Zhang,Peng Zhao
Yttrium aluminum garnet (YAG, Y 3 Al 5 O 12 )nanopowders were synthesized by a polyacrylamide gel method at a much lower temperature of 900 °C than using the traditional methods. This synthesis process was thoroughly investigated including an examination of the phase transformation, the particle size and agglomeration degree at different molar ratios of monomer to the precursor salt and the calcination temperature. A high mole ratio of monomer to the precursor salt led to low formation temperature of YAG, resulting from the high homogeneity and reduced particle size of the precursor. Consequently, weak-agglomerated YAG nanopowder with an average particle size of 35 nm can be prepared at a calcination temperature of 900 °C for 2 h. The as-prepared YAG nanopowder showed excellent sinter-ability.
研究领域:
材料科学
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yiru Shen,Ying Sun,Bocheng Jin,Ming Li,Bohang Xing,Zhe Zhao
With no extra assistance of CIP or HIP, YAG transparent ceramics were successfully fabricated by digital light processing (DLP) stereolithography method followed by careful debinding and vacuum sintering. We systematically studied the effect of heating rate, atmosphere during debinding and the heating rate, holding time during sintering on the light transmittance of YAG ceramics. All results indicated that debinding in the 95N 2 /5H 2 mixture is the key controlling factor for achieving better densification and optical properties , regardless of the sintering profile. However, a lower heating rate can indeed promote the densification process and balance some shortcomings linked with the debinding in air. At least, three different debinding processes and three different sintering profiles are combined, which leads to a high in-line transmittance of ∽77%.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Materials Research Express
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2019
·Vol. 6
·期 10
·105099
·
IF 1.449
Cao Wang,Ming Li,Zhe Zhao
Commercial α-Al2O3 and Y2O3 powders with 0.5 wt% TEOS were used to fabricate transparent polycrystalline YAG ceramics by reactive spark plasma sintering. The powder mixtures were dispersed with dispersants of PAA and citric acid in aqueous slurry. YAG specimens sintered at 1400 °C for 3 min were used to investigate the effect of processing parameters on the microstructure and the optical properties. It is found that a pretreatment of the powders mixture with 0.6 wt% citric acid can significantly improve the microstructure homogeneity of the as-sintered YAG ceramics. After post-annealing in wet air, the specimen sintered from the treated powders mixture was transparent, while the specimen from the untreated powders mixture was hazy. The effects of citric acid for this were investigated in this paper.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2019
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IF 2.961
Yang Liu,Mingfu Zhang,Lijun Xu,Wei Xia
Transparent Ce 3+ :YAG ceramics have great potentials in WLEDs due to their ultra-high thermal endurance property and thermal stability of luminescence. However, it is still a challenging issue to enhance their light extraction ability. In the study, the transparent Ce 3+ :YAG ceramics were fabricated using the uniform Ce:Y 2 O 3 submicron spheres by a solid-state reactive sintering method under vacuum without any sintering additives. The content of the residual pores and grain boundaries, which acted as the “light-scattering centres” to improve the absorption of blue light, were adjusted by changing sintering temperature . The luminous efficacy of the WLED with the sample sintered at 1700 °C was as high as 104.6 lm/W, due to the appropriate quantity of the “light-scattering centres”. The microstructures, transmittance , excitation and emission spectra , luminous characteristics of the samples were studied. The results showed that the preparation progress could significantly enhance the luminous efficacy in the WLED with transparent ceramics.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Weixin Zhou,Chaogang Lou
In recent years, significant efforts have been made to explore the application of Ce 3+ 5d-4f radiation transitions in photovoltaic cells. However, conventional fabrication methods are constrained by prolonged preparation times and high processing temperatures. This study synthesizes traditional rare earth YAG: Ce 3+ phosphors using the spark plasma sintering (SPS) method through multi-field coupling and systematically compares their luminescent performance with phosphors prepared by high-temperature solid-state reactions (HTSSR). The crystal structure, morphology, luminescent properties, and fluorescence lifetime of the synthesized phosphors were thoroughly investigated. The results show that YAG: Ce 3+ phosphors synthesized by SPS possess a cubic garnet structure with an Ia-3d space group, confirming the effective incorporation of Ce 3+ into the YAG host. The average particle diameter of YAG:0.01Ce 3+ @SPS-1400 °C phosphors (1.1289 μm) is smaller than that of HTSSR-prepared samples (1.9326 μm). Under 466 nm blue-light irradiation, YAG:0.01Ce 3+ @SPS-1400 °C phosphors exhibit broad-band yellow emission centered at 534 nm, with a full width at half maximum (FWHM) of 102 nm. Compared to other samples, the YAG:0.01Ce 3+ @SPS-1400 °C phosphors demonstrate a slight red shift and a longer fluorescence decay lifetime (43.6 ns). These enhanced luminescent and fluorescence properties contribute to a 0.90 % improvement in the relative efficiency of silicon heterojunction (SHJ) solar cells incorporating YAG:0.01Ce 3+ @SPS-1400 °C phosphors, compared to a 4 % decrease with YAG:0.01Ce 3+ @HTSSR. The findings highlight the potential of SPS-fabricated YAG:Ce 3+ phosphors to enhance SHJ solar cell efficiency, presenting a novel and efficient preparation method for rare earth phosphors.
研究领域:
材料科学
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能源科学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 1
·e70527
·
IF 3.8
Hailiang Fang,Beiying Zhou,Ping Huang,Lianjun Wang,Wan Jiang
Yttrium aluminum garnet (YAG) has garnered extensive attention and research interest as an ideal laser host material due to its excellent optical properties, mechanical strength, and stable physicochemical characteristics. This study successfully fabricated highly dense (99.8% relative density) YAG ceramics via high-specific-surface-area mesoporous YAG powders combined with spark plasma sintering (SPS) at 1400°C under 60 MPa, with a dwell time of only 3 min. The as-fabricated dense YAG ceramics exhibited excellent mechanical properties, including a Vickers hardness (HV) of 15.02 GPa and a fracture toughness of 2.3 MPa·m 1 / 2 . This research reveals the critical role of highly sinter-active mesoporous YAG powders in the low-temperature preparation of high-density YAG ceramics, while also providing a novel and important strategy for rapidly producing high-performance fine YAG ceramics at low sintering temperatures.
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 4
·1758-1767
·
IF 2.956
Nan Jiang,Weiping Lin,Yu Zhao,Juntao Wang,Qingsong Gao,Haiyun Qu,Lin Ge,Tengfei Xie,Qiang Liu,Yubai Pan,Jiang Li
Using the tape casting method combined with vacuum sintering and hot isostatic pressing, high-quality planar waveguide YAG/10 at.%Yb:YAG/YAG ceramics were successfully prepared. For the sample presintered at 1750°C for 30 hours and then HIPed at 1700°C for 3 hours in 200 MPa argon, the in-line transmittance reached 82.5% at 400 nm and the average grain size was ~17.1 μm. The diffusion behaviors of Yb ions across the contact boundary between the cladding YAG layer and the core Yb:YAG layer were determined by Fick's second law. Then, a 1030 nm continuous-wave (CW) Yb:YAG planar waveguide ceramic laser based on the structure of master oscillator power amplification (MOPA) was realized. After a single-pass amplification, the maximum output of the ceramic slab (60 × 10 × 1 mm 3 ) reached 1251 W and the corresponding optical-to-optical efficiency was 30.0%, which is the highest output power of a Yb:YAG planar waveguide ceramic laser to the best of our knowledge.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Binglong Liu,Jiang Li,Roman Yavetskiy,Maxim Ivanov,Yanping Zeng,Tengfei Xie,Huamin Kou,Shangjun Zhuo,Yubai Pan,Jingkun Guo
Well-dispersed yttria nanopowders were synthesized by a precipitation method from yttrium nitrate solution using ammonium hydrogen carbonate as a precipitant. Needle-like precursor Y 2 (CO 3 ) 3 ·2.79 H 2 O undergoes fragmentation and decomposition into isolated quasi-spherical Y 2 O 3 particles upon calcination in air. Highly transparent YAG ceramics were fabricated from the as-synthesized Y 2 O 3 powder and the commercial α-Al 2 O 3 powder by vacuum sintering. Phase transformation, morphology evolution, and sinterability of Y 2 O 3 powders, microstructure and optical properties of YAG ceramics were investigated in detail. The densification, grain growth, linear shrinkage and phase transformation of the as-sintered ceramics were also explored. The activation energy for grain growth in the ceramic sample is 881 kJ/mol. With optimized preparation conditions, YAG ceramics with the average grain size of about 20 μm were fabricated by sintering at 1780 °C for 20 h, whose in-line transmittance reached 83.7% and 80.3% at the wavelength of 1064 nm and 400 nm, respectively.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2013
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IF 2.56
Xiangbo Ji,Jianguo Deng,Bin Kang,Hui Huang,Xin Wang,Wei Jing,Tao Xu
Yttrium aluminum garnet (YAG) nano-precursors were synthesized by urea homogeneous co-precipitation. The morphology and crystalline phase, particularly the in situ evolved gases of as-synthesized precursors during the thermal decomposition, were characterized and verified. The evolved NH 3 , H 2 O, and CO 2 gases can be observed below 600 °C. The released NO 2 gas was observed at 202 °C, 500 °C and 885 °C, which suggests that N O 3 − existed in the precursor with three different forms. Furthermore, the evolved SO 2 gas was detected above 850 °C due to desulfurization. Phase-pure YAG can be obtained when the precursor was calcined at 900 °C. The particle size increases with increasing calcination temperature. The powders calcined at 1100 °C were well dispersed and had an average grain size of 100 nm owing to the decomposition of S O 4 2 − at high temperatures.
研究领域:
材料科学
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化学工程
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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）