OPTICAL MATERIALS
·
2020
·
IF 2.779
Feng Tian,Cong Chen,Qiang Liu,Roman Yavetskiy,Maxim Ivanov,Stanislav Balabanov,Yagang Feng,Xin Liu,Ziyu Liu,Dianjun Hu,Zhaoxiang Yang,Tengfei Xie,Jiang Li
Nd:YAG transparent ceramics were obtained by vacuum sintering from nanopowders synthesized by co-precipitation method. The co-precipitated powder was optimized by studying calcination temperature (from 800 to 1300 °C) of the precursor and ball-milling time (from 0 to 24 h). Influences of calcination temperature and ball-milling time on comprehensive properties of nanopowders were studied in detail. Influences of sintering conditions (sintering temperature and holding time) on transmittance and microstructure were also investigated. The conclusions based on a comprehensive study of the whole ceramics processing from the powders synthesis to Nd:YAG ceramics sintering. The co-precipitated powder calcined at 1250 °C with ball-milling for 12 h demonstrates relatively better comprehensive properties. The 1.0 at% Nd:YAG ceramic sample with the thickness of 1.3 mm sintered at 1775 °C for 20 h has the highest in-line transmittance of 76.0% at 1064 nm.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Le Zhang,Yaozong Li,Xiaoyang Li,Hao Yang,Xuebin Qiao,Tianyuan Zhou,Zhongying Wang,Jian Zhang,Dingyuan Tang
Solid content of suspension for spray drying was systematically investigated to obtain spherical and dense Nd: granulated particles. The rheological behavior, morphology, size and distribution, apparent and tap densities, and transmittance measurements were used as tools to guide the selection of solid content of suspension. The balanced solid content were 42.0 wt.%. The granulated particles exhibited close to mono-dispersed, spherical and uniform dense aggregates, and mean size was ∼35 μm. Under 60 MPa pressure, the granules were completely crushed without obvious inter-granules void. The homogeneous element distribution and fine microstructure provided high optical quality of Nd:YAG ceramics and the transmittance at 1064 nm reached up to 84.90%.
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
Optical Materials Express
·
2014
·Vol. 4
·期 5
·1042-1049
·
IF 2.923
Lin Ge,Jiang Li,Zhiwei Zhou,Haiyun Qu,Manjiang Dong,Yan Zhu,Tengfei Xie,Wei Li,Min Chen,Huamin Kou,Yun Shi,Yubai Pan,Xiqi Feng,Jingkun Guo
Composite YAG/Nd:YAG/YAG transparent ceramics for planar waveguide laser were fabricated by non-aqueous tape casting and solid-state reactive sintering. The slurry made from the oxide powder mixtures shows a shear thinning behavior. The morphologies of the tapes were homogeneous in structure, and the tapes had appropriate strength and toughness. After calcining at 600°C for 10h in air, the samples contained less than 0.05wt.% of carbon. No gaps were found between the layers on the fracture surface of the green body compacted by cold isostatic pressing. The composite YAG/Nd:YAG/YAG transparent ceramics with in-line transmittance of 82.5% at 1064nm were obtained by vacuum-sintering at 1760°C for 30h, whose average grain size is 36.8μm. The diffusion distance of the Nd3+ ions was about 150μm along the thickness direction of the 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
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2021
·Vol. 129
·期 3
·159-167
·
IF 1.224
Yonghuan HAN,Liwen YAN,Shichen XIE,Tao XU,Wei JING,Feng HOU
Nd3xY3−3xAl5O12 (Nd:YAG) powders with high uniformity were synthesized by reverse-titration co-precipitation method. The precipitation formation process and dispersion mechanism of Nd:YAG precursor in co-precipitation process were analyzed, and the influence of the preparation technology on the dispersion of powders was explored by adjusting the concentration of precipitator, alcohol-water solvent and ratio of composite dispersant. In addition, through the analysis of the precursor calcination process, combined with SEM and particle size analysis, it is shown that, under optimum processing conditions, the powders have excellent particle uniformity, narrow particle size distribution and appropriate crystal size when calcined at 1150 °C for 2 h.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
IF 2.183
Lin Ge,Jiang Li,Haiyun Qu,Juntao Wang,Jiao Liu,Jiawei Dai,Zhiwei Zhou,Binglong Liu,Huamin Kou,Yun Shi,Zheng Wang,Yubai Pan,Qingsong Gao,Jingkun Guo
The sintering behavior and doping concentration profile of the planar waveguide YAG/Nd:YAG/YAG ceramics by the tape casting and solid-state reaction method were investigated on the basis of densification trajectory, microstructure evolution, and Nd 3+ ions diffusion . The porosity of the green body by tape casting and cold isostatic pressing is about 38.6%. And the green bodies were consolidated from 1100 °C to 1800 °C for 0.5–20 h to study the densification and the doping diffusion behaviors. At the temperature higher than 1500 °C, pure YAG phase is formed, followed by the densification and grain growth process. With the increase of temperature, two sintering stages occur, corresponding to remarkable densification and significant grain growth, respectively. The mechanism controlling densification at 1550 °C is grain boundary diffusion. The diffusion of Nd 3+ ions is more sensitive to temperature than the sintering time, and the minimum temperature required for the obvious diffusion of Nd 3+ ions is higher than 1700 °C. Finally, planar waveguide YAG/1.5 at.%Nd:YAG/YAG transparent ceramics with in-line transmittance of 84.8% at 1064 nm were obtained by vacuum-sintering at 1780 °C for 30 h. The fluorescence lifetime of 4 F 3/2 state of Nd 3+ in the specimen is about 259 μs. The prepared ceramic waveguide was tested in a laser amplifier and the laser pulse was amplificated from 87 mJ to 238 mJ, with the pump energy of 680 mJ.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2013
·
IF 2.36
Yongfei Liu,Xiaoying Qin,Hongxing Xin,Chunjun Song
Neodymium doped yttria (Nd:Y 2 O 3 ) nanopowders were synthesized by a co-precipitation method, and the effect of thermal decomposition behavior of the precursors were studied. Nonlinear and linear heating schedules (NHS and LHS) were adopted during the calcination processes. The results show that as compared to the LHS the NHS can not only lower the crystallization temperature substantially, but also decrease the mean particle size and lighten the particle agglomeration in the obtained Nd:Y 2 O 3 nanopowders. Using the obtained well-dispersed Nd:Y 2 O 3 and commercial Al 2 O 3 powders, transparent Nd:YAG ceramics were fabricated at 1750 °C in vacuum. Better transparency can be obtained by using the Nd:Y 2 O 3 powders calcined in the NHS instead of the LHS.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Qiang Liu,Cong Chen,Jiawei Dai,Zewang Hu,Haohong Chen,Jiang Li
Using the nanopowders synthesized by a reverse co-precipitation method, neodymium doped yttrium aluminum garnet (Nd:YAG) transparent ceramics were fabricated by vacuum sintering method. The influence of ammonium carbonate to metal ions (NH 4 HCO 3 /M 3+ ) molar ratio (R value) on the properties of Nd:YAG precursors and powders, as well as the densification, microstructure, and transmittance of the resultant ceramics was systematically investigated. The results show that the precursors have similar compositions and the calcined powders have pure Y 3 Al 5 O 12 (YAG) phase. However, the R value is closely related to the morphologies of the precursors and powders. It is found that the powder with R = 3.0 has strongest agglomeration and the powders with R = 3.2–4.0 show better dispersity. Using these powders as starting materials, the corresponding ceramics were sintered at 1720 °C for 20 h in vacuum. As a result, the ceramic with R = 3.2 obtains the best transmittance of about 72% at the wavelength of 1064 nm. The grain growth exponent and activation energy of the Nd:YAG ceramics fabricated from the powder with R = 3.2 were also studied.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Feng Tian,Cong Chen,Yang Liu,Qiang Liu,Maxim Ivanov,Qingqing Wang,Nan Jiang,Haohong Chen,Zhaoxiang Yang,Tengfei Xie,Jiang Li
Using the nanopowders made by a reverse co-precipitation as raw materials, neodymium doped yttrium aluminum garnet (Nd:YAG) transparent ceramics were fabricated by vacuum pre-sintering with subsequent hot isostatic pressing (HIP) post-treatment. The green bodies were pre-sintered in vacuum at 1450 o C–1800 °C for 2 h and then HIPed at 1750 °C for 3 h under 200 MPa Ar atmosphere. Densification behavior and microstructure of the Nd:YAG ceramics before and after the HIP-treatment were investigated. Influences of the annealing temperature on transmittance and microstructure of the Nd:YAG ceramics were also studied. The ceramics pre-sintered at 1750 °C for 2 h and post-HIPed at 1750 °C for 3 h without any additional annealing in air were shown to have the best in-line transmittance of 79.1% at 1064 nm.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Rui Yin,Jiang Li,Manjiang Dong,Tengfei Xie,Yuelong Fu,Wei Luo,Lin Ge,Huamin Kou,Yubai Pan,Jingkun Guo
Highly transparent Nd:YAG ceramics were fabricated by non-aqueous gelcasting and vacuum sintering for the first time, using epoxy resin and polyamine curing agent as gelling system. The influences of dispersant, solid loading and the organics of gelling system on the viscosity of suspensions and the stability of suspensions were discussed. The optimized nonaqueous slurry was of 54 vol% solid loading, comprising the commercial α-Al 2 O 3 , Nd 2 O 3 and Y 2 O 3 powders. The slurry with low viscosity and good fluidity was obtained by using 0.45 wt% PEI as dispersant. The homogenous and dense green body was obtained through solidificating the slurry in-situ. The green body after burnout had a relative density of 55.0% with a narrow pore size distribution . The transmittance of the Nd:YAG ceramics sintered at 1775 °C for 30 h with the thickness of 1.5 mm reached 83% at 1064 nm. The average grain size of the sample was about 71 μm.
研究领域:
材料科学
·
无机非金属材料
·
先进陶瓷
·
光学材料
·
生物医学材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 4
·e70682
·
IF 4.2
Xinyu Li,Haohao Ji,Yuhan Yang,Dewen Wang,Jie Ma,Shiwei Wang,Jian Zhang
To address the thermal management issues during the diode laser pumping process, solid-state laser gain media have been developed into various shapes and configurations. As a typical additive manufacturing technique, fused deposition modeling (FDM) exhibits advantages such as low requirements on feedstock rheology and the capability to fabricate multi-component and large-sized ceramic samples with complex shapes. In this study, the FDM method was applied to form Nd:YAG laser ceramics. The green bodies underwent a combined debinding process involving both solvent extraction and thermal treatment. After that, the samples were densified by vacuum sintering and followed by hot isostatic pressing. The in-line transmittance at 1064 nm of the Nd:YAG laser ceramic approaches 83.9%. With an output coupling mirror transmittance of 30%, the 3×3×6 mm 3 sample achieved a maximum output of 7.7 W under the diode laser pump power of 20.0 W, corresponding to a slope efficiency of 40.7%. The FDM method has shown great potential for the fabrication of high optical quality laser ceramics with complicated configurations.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Shengquan Yu,Wei Jing,Mingjing Tang,Tao Xu,Wenlong Yin,Bin Kang
The highly transparent Nd:YAG ceramics were prepared by using powders synthesized by citrate sol-gel method. The citrate sol-gel method could avoid defects of the solid-phase reaction method and the liquid phase co-precipitation method in preparing Nd:YAG ceramic powders with the ratio of (Nd 3+ , Y 3+ ):Al 3+ equal to 3:5. The dried gel was the three dimensional net-shaped porous structure. When the dried gel was calcined at 500 °C in oxygen, pure YAG phase formed directly with no intermediate phases. The Nd:YAG powders calcined at 800 °C had maximum particle size near 500 nm. These powders were not equiaxed and there were dumbbell-like and annular grains. The highly compact Nd:YAG ceramics could be well sintered at 1750 °C for 12 h in vacuum atmosphere, and these sample had the average grain size about 3.8 μm. The polished Nd:YAG ceramics was highly transparent, and the transmittances at 1064 nm and 400 nm were 83.4% and 74.2%, respectively. The fluorescence emission spectrum implied high possibility of realizing laser output at 1064 nm by pumping at 808 nm. Generally, the citrate sol-gel method was also a reliable choice for preparing high quality Nd:YAG transparent ceramics.
研究领域:
材料科学
·
陶瓷
·
光学材料
·
激光技术
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Yuhan Yang,Haohao Ji,Mengmeng Xie,Dewen Wang,Wenhao Zhou,Jian Zhang,Yu Liu,Shiwei Wang,Zheng Wang
Gradient doping of Nd: YAG (Nd: Y 3 Al 5 O 12 ) can relieve thermal effect during laser operation in solid-state lasers. Direct ink writing (DIW) is an effective method for fabricating gradient-doped structures. However, the delay issue during component switching significantly affects rare-earth ion concentration distribution in the samples, which includes delivery delay and transitional delay. They were respectively optimised by reducing the volume of mixing zone and by modifying component switching mode. Firstly, simulations of the mixing zone before and after optimisation were conducted using ANSYS Fluent to demonstrate the mixing uniformity. Secondly, the processes of component changes during extrusion were simulated to demonstrate the effectiveness of the two delay optimisation methods. Line patterns were printed using DIW with varying mixing zone volumes and component switching modes. The delay optimisation methods were confirmed to significantly reduce the impact of the delay by measuring Nd 3+ ion concentration. Furthermore, a mathematical model was developed to assess the influence of two delay optimisation methods on the delay. Finally, 0–0.5–1–0 at% Nd: YAG gradient-doped laser ceramics were successfully fabricated based on the proposed delay optimisation method, and the performance characterization of the Nd: YAG laser ceramics confirmed the efficacy of the method.
研究领域:
材料科学
·
光学工程
✓ 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）