JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 4
·2491-2500
·
IF 4.186
Hailiang Fang,Shijia Gu,Shengjie Fan,Beiying Zhou,Ping Huang,Wei Luo,Lianjun Wang,Wan Jiang
Fine-grained and dense highly transparent Y 2 O 3 ceramics have been successfully prepared using high sintering activity mesoporous Y 2 O 3 powders without any additive by spark plasma sintering (SPS). The influences of the sintering temperature on microstructure, density, optical, and mechanical properties of SPS-sintered Y 2 O 3 ceramics were studied in detail. As results, the optimal Y 2 O 3 ceramics with high relative density of 99.90% and fine average grain size of 140 nm were obtained at a low sintering temperature of 1140°C and a moderate load pressure of 60 MPa for 5 min. Meanwhile, the dense Y 2 O 3 ceramics with 1 mm thickness after annealing show a high linear transmittance of 78% (close to 94% of the theoretical value) at 2.4–3 µm wavelength. In additions, the Vickers hardness and fracture toughness of samples can reach 8.48 GPa and 1.45 MPa m 1/2 , respectively. This result proves that the high activity of mesoporous Y 2 O 3 is considered to be an important means for preparing high-performance fine Y 2 O 3 ceramics at low sintering temperature.
研究领域:
材料科学
·
陶瓷
·
光学材料
·
纳米材料
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Hailong Li,Yingjie Chen,Lijian Leng,Yingchao Hu
Reliable energy storage technology is a prerequisite for the efficient utilization of solar energy, among which thermochemical energy storage based on calcium looping emerges as a promising candidate. In this work, antisintering Y2O3 was doped into CaO to prepare a novel composite for energy storage. Benefiting from the homodispersity of Y2O3 in active CaO, which was proved by both scanning electron microscopy and transmission electron microscopy analyses, the novel composite exhibited high energy storage density and excellent cyclic stability. 35 wt % is considered as the optimal addition amount of Y2O3 because of its highest energy storage density of 1986 kJ/kg after 10 cycles. CaY35 not only showed outstanding extended cyclic performance but also maintained a satisfactory energy storage density of about 1400 kJ/kg under harsh calcination conditions due to its increased Brunauer–Emmett–Teller specific surface area and enriched porosity through the N2 adsorption analysis. In addition, the extrusion-spheronization method was employed to granulate CaY35 powders into spherical pellets. The extrusion force during the granulation process led to the destruction of the sorbent structure to some extent, resulting in a slight decline in pellet performance. However, the granulation endowed the pellets with excellent mechanical strengths and they lost only 4.28 wt % of their initial mass after 7000 rotations in a fragility tester, which was of great significance for their cyclic practical applications.
研究领域:
能源材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Surface Investigation
·
2017
·Vol. 11
·期 4
·827-831
·
IF 0
Mikhailov M. M.,Neshchimenko V. V.,Chundong Lee,Utebekov T. A.
A comparative analysis of the structure, phase composition, morphology, and diffuse reflection spectra in the region of 0.2–2.5 μm is carried out. Their changes arising from the bombardment of microand nanopowders of yttrium oxide with 100-keV protons and 100-keV electrons is examined. It is found that the reflectance of the nanopowders in the near-IR (infrared) region is less than that of the micropowders and, upon electron bombardment, their radiation resistance is slightly larger as compared to the micropowders.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yan Yang,Yawen Deng,Li Zhang,Yaru He,Shuai Zhao,Ting Xiao,Suihu Dang,Yunfeng Bai
Er 3+ /Li + co-doped Y 2 O 3 nanocrystals were synthesized by the sol-gel method. Fluorescence intensity has been enhanced about 270 times under 980 nm laser excitation by combined laser annealing (90 times) and co-doped with Li + ions (3 times). The doping of Li + ions increased the asymmetry around Er 3+ , while laser annealing reduced surface defects . Fluorescence characteristics with the temperature of laser annealed Er 3+ /Li + co-doped Y 2 O 3 nanocrystals were studied. An interesting phenomenon that the non-thermal coupling of I 563 /I 799 transformed into the thermal coupling as the temperature rises is found. The possible mechanisms were discussed, and fluorescence thermometry based on I 563 /I 799 showed higher temperature sensitivity than other reports. The effective fluorescence enhancement method and the new fluorescence thermometry energy levels can promote the application of rare earth fluorescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 2
·252
·
IF 3.4
Yunzhang Li,Meng Zhou,Yi Zhang,Hanjing Zhu,Xianhua Zheng,Shengli Liang,Shunlong Tang,Baohong Tian,Yong Liu,Xu Li,Alex A. Volinsky,Chenglin Zheng
With the massive penetration of electronics into human life, higher demands are placed on electrical contacts. Among them, the lifetime of electrical contacts and safety are the most concerning. In this research, Al2O3-Cu/25Mo5Ta and 0.5Y2O3/Al2O3-Cu/25Mo5Ta composites were prepared by using ball milling and powder metallurgy methods. The two composites were subjected to 10,000 contact opening and closing electrical contact experiments and the arc duration and arc energy were analyzed. The results show that the addition of Y2O3has a slight effect on the mechanical properties of the Al2O3-Cu/25Mo5Ta composites but has a significant effect on the electrical contact performance. Y2O3can reduce the mass loss of the electrical contacts during the electrical contact process, which prolongs their service life. The addition of Y2O3decreased the average arc duration and arc energy of the electrical contact material by 21.53% and 18.02%, respectively, under the experimental conditions of DC 30 V, 10 A. TEM results showed that nanoscale YTaO4with excellent thermal stability was generated during the sintering process, which has a positive effect on the electrical contact performance of the composites.Keywords:copper matrix composites;electrical contact;arc erosion behavior;yttrium tantalate
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.6
Yong Tang,Jianwei Zhao,Yi Li,Yujing Wang,Guangqiu Zhang,Yihang Zhao,Lirong Qin
In this study, we demonstrate a synergistic approach combining hydrothermal synthesis with laser annealing to fabricate Y 2 O 3 : x Eu 3+ phosphors ( x = 0.5, 1, 2, 5, 8, 10 %). When the doping concentration is 5 % Eu 3+ , the photoluminescence performance of the sample is the best, with the maximum emission intensity and a longer lifetime. The phosphor obtained by laser annealing, when excited by a 395 nm laser, emits light with a higher color purity than that obtained by traditional annealing; its thermal stability is also improved. Rietveld refinement confirms laser processing promotes preferential Eu 3+ occupation at low-symmetry C 2 sites, optimizing electric dipole transitions. Meanwhile, both Fourier transform infrared spectroscopy and absorption spectroscopy tests have proved that the performance of the laser-annealed samples is higher than that of the samples annealed in the furnace. In conclusion, laser annealing can be used as a new method for preparing high-performance rare earth luminescent materials.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS B-LASERS AND OPTICS
·
2024
·Vol. 130
·期 3
·38
·
IF 2
Ran Qiu-Yue,Lian Yu-Long,Tang Yong,Hao Jian-Hong,Bai Yun-Feng
FIR temperature measurement based on thermally coupled levels of rare earth ions has been widely studied, but its sensitivity is limited by the thermal coupling levels’ spacing. In this letter, a transition from non-thermally coupled levels of Ho 3+ to thermally coupled levels is reported for the first time. It can effectively improve the sensitivity of temperature measurement based on thermal coupling levels. The Ho 3+ /Yb 3+ co-doped Y 2 O 3 millimeter crystals have been prepared by laser annealing. The fluorescence properties of laser-annealed Ho 3+ /Yb 3+ co-doped Y 2 O 3 millimeter crystals were investigated as a function of temperature. It was found that the I 667nm / I 549nm show non-thermal coupling below 453K, but changes to thermal coupling above 453K. The maximum relative sensitivity of I 667nm / I 549nm in thermal coupling is greater than the relative sensitivity of any known thermal coupling energy levels of Ho 3+ . It provides a new way to improve the sensitivity of thermally coupled FIR temperature measurement.
研究领域:
材料科学
·
光学传感
·
稀土掺杂
·
激光加工
·
温度测量
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·
IF 2.93
Ying Wang,Li Wang,Ning Gan,Zi-Yian Lim,Chunzheng Wu,Jun Peng,Wei Guo Wang
Ni/ x Y 2 O 3 –Al 2 O 3 ( x = 5, 10, 15, 20 wt%) catalysts were prepared by sequential impregnation synthesis. The catalytic performance for the autothermal reforming of methane was evaluated and compared with Ni/γ-Al 2 O 3 catalyst. The physicochemical properties of catalysts were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM), X-Ray Photoelectron Spectrometer (XPS), Thermo Gravimetric Analyzer (TGA) and H 2 -temperature programmed reduction techniques (TPR). The decrease of nickel particle size and the change of reducibility were found with Y modification. The CH 4 conversion increased with elevating levels of Y 2 O 3 from 5% to 10%, then decreased with Y content from 10% to 20%. Ni/ x Y 2 O 3 –Al 2 O 3 catalysts maintained high activity after 24 h on stream, while Ni/Al 2 O 3 had a significant deactivation. The characterization of spent catalysts indicated that the addition of Y retarded Ni sintering and decreased the amount of coke.
研究领域:
催化化学
·
能源材料
·
化学工程
·
无机功能材料
·
工业催化
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 8
·e71138
·
IF 4.2
Yilin Jia,Zhoufu Wang,Hao Liu,Yan Ma,Yunjie Dong,Haokai Song,Huimin Yu,Siyuan Wu
In aerospace, metallurgy, and related fields, Y 2 O 3 ceramics have broad application prospects owing to their excellent high-temperature chemical stability; however, their widespread application is limited by poor thermal shock resistance. In this study, LaAlO 3 , a toughening phase with good chemical compatibility and excellent mechanical and thermal properties, was introduced into Y 2 O 3 ceramics via an in-situ reaction method to improve their thermal shock resistance. The property and structural evolution of Y 2 O 3 /LaAlO 3 multiphase ceramics under cyclic thermal shock and different thermal shock temperature differences were systematically investigated. The results show that the residual strength of the ceramics exhibited an exponential decreasing trend. After nine thermal shock cycles, the elastic modulus and fracture toughness of the Y 2 O 3 /LaAlO 3 multiphase ceramics were 144.6% and 121.5% of those of the Y 2 O 3 ceramics, respectively. LaAlO 3 hindered crack propagation through a pinning effect, while its ferroelastic domain-switching mechanism effectively dissipated stress at the crack tip. The crack-particle interaction model indicated that thermal shock cracking in the multiphase ceramics had a saturation limit. After nine cycles, the crack damage area per interaction reached approximately 90% of the damage tolerance, and the crack propagation rate continued to decrease. With increasing thermal shock temperature difference, the residual strength of the composite ceramics exhibited a nonmonotonic trend, with a residual strength retention of 73.1% after three thermal shock cycles from 800°C to room temperature. This can be attributed to the dissipation of strain energy by ferroelastic domain rearrangement and domain-wall motion during the LaAlO 3 phase transformation. In addition, the elastic softening associated with the phase transformation improved the strain compliance of LaAlO 3 , reduced local thermal stress, and mitigated damage in the ceramics.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Peng Zhang,Guang-Hui Liu,Yao-Shun Wen,Yu-Hong Kang,Yang-Fan Yin,Sheng Li,Zhi-Xin Li,Zhi-Hao Ma
Morphology engineering plays a pivotal role in boosting catalytic performance over heterogeneous catalysis. However, although Y 2 O 3 (a rare earth oxide) has been found to possess various morphologies, including nanoplate (NP), nanosphere (NS) and nanorod (NR), the lack of understanding of its catalytic mechanism still limits its further application. Herein, catalytic mechanism of Y 2 O 3 morphologies in reverse water-gas shift (RWGS) reaction over Cu-based catalysts was systematically investigated. Although Y 2 O 3 morphologies don’t affect CO selectivity, it has a significant impact on CO 2 conversion and stability. Systematic characterization reveals that Y 2 O 3 morphologies not only can optimize the CO 2 adsorption capacity and Cu nanoparticles size to enhance catalytic activity, but also can regulate the metal-support interaction to improve catalytic stability. The order of activity and stability of the Cu/Y 2 O 3 catalysts from high to low is: Cu/ NP Y 2 O 3 > Cu/ NR Y 2 O 3 > Cu/ NS Y 2 O 3 . This work clarifies the morphological-performance relationship in rare earth oxide-Y 2 O 3 , providing a new approach for the design of high-performance Cu-based catalysts for RWGS reaction and promoting the application of morphology engineering in heterogeneous catalysis.
研究领域:
多相催化
·
材料化学
·
纳米材料
·
能量转换
·
催化反应工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shen Zhou,Zhoufu Wang,Zhenghuang Quan,Hao Liu,Yan Ma,Pingtao Fang,Chao Shu
Yttrium oxide materials exhibit excellent vacuum and high-temperature chemical stability as well as low wettability with alloys, making it ideal for superalloy smelting. However, its poor sinterability and low fracture toughness, which result in poor thermal shock resistance significantly limit its service life. This study focuses on yttrium oxide materials. By incorporating ferroelastic functional unit characteristics, a pre-synthesized LaAlO 3 phase with good intrinsic toughness was introduced into the Y 2 O 3 matrix. The effects of different LaAlO 3 contents on the phase composition, microstructure, mechanical properties, and thermal shock stability of the composite materials were systematically investigated. Results indicate that Y 2 O 3 /LaAlO 3 composite materials can be prepared successfully by regulating the La 3+ segregation behavior to form a transition layer at the phase boundary. This method can significantly enhance both the strength and toughness of materials through the ferroelastic domain switching effect and the solid solution effect. These mechanisms are capable of effectively improving the material's resistance to crack propagation and thermal stress relaxation, thereby improving the thermal shock resistance of the composites under thermal shock conditions. When 15 mol% LaAlO 3 was added to Y 2 O 3 , the fracture toughness of the composite material increased to 4.65 ± 0.14 MPa m 1/2 . The residual strength retention of the composite material increased from 36.50 % to 43.38 % after thermal shock. Therefore, by constructing a phase boundary transition layer through La 3+ ion solid-solution, Y 2 O 3 /LaAlO 3 composite materials can be prepared, effectively enhancing both the mechanical properties and thermal shock resistance of Y 2 O 3 matrix ceramics, offering a viable strategy for designing high-performance oxide ceramics.
✓ 已验证
产品关联
DOI
高影响因子
SCRIPTA MATERIALIA
·
2019
·
IF 4.539
Qiang Liu,Penghui Chen,Nan Jiang,Xing Zhang,Xiaoying Li,Sha Su,Zewang Hu,Haohong Chen,Tengfei Xie,Jiang Li
8.7 mol% Y 2 O 3 -ZrO 2 (Y 0.16 Zr 0.84 O 1.92 ) precursor was synthesized by the co-precipitation method using ammonia as the precipitant. The Y 0.16 Zr 0.84 O 1.92 powders calcined at 800 °C show a pure c-ZrO 2 phase. The average crystallite size of the powders is 12.4 nm and weakly agglomerated to an average particle size of 15.5 nm. Y 0.16 Zr 0.84 O 1.92 transparent ceramics were then successfully fabricated by pre-sintering at 1350 °C for 2 h and HIP post-treatment at 1750 °C for 1 h under 200 MPa without sintering additives. The in-line transmittance of Y 0.16 Zr 0.84 O 1.92 ceramics (1 mm thick) exceeds 50.3% in the region of 400–850 nm, reaching about 65.3% at 800 nm.
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
危险品化学品经营许可证（带存储）