CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Dianguang Liu,Yan Gao,Jinling Liu,Yiguang Wang,Linan An
A mixture of pure monolithic ZrO 2 and Y 2 O 3 powders was flash-sintered at different holding times. The results show that flash-sintering led to a rapid phase transformation: The starting monolithic ZrO 2 completely transformed to tetragonal phase after the flash-sintering for as short as 10 s. Although dense samples with relatively uniform microstructures were obtained at a holding time of longer than 5 min, the holding time had no significant effect on grain size. Both the bulk and intrinsic grain-boundary conductivity increased with an increase in the holding time, indicating that flash-sintering created oxygen vacancies in both grains and grain boundaries that accumulated with an increase in the holding time.
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
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 14
·8556-8567
·
IF 2.599
Zhang Le,Li Zheng,Zhen Fangzheng,Wang Lixi,Zhang Qitu,Sun Rong,Selim Farida A.,Wong Chingping,Chen Hao
High sinterability nano-Y 2 O 3 powders for transparent ceramics were successfully synthesized via the decomposition of hydroxyl-carbonate precursors from spray coprecipitation. The chemical composition of the precursor was determined as Y(CO 3 )(OH)· n H 2 O ( n = 1–1.5), and it was evolved into Y 2 O 3 particles with clear facets after calcination with the assistance of sulfate. Two dispersion mechanisms, “absorption” and “intercalation,” were proposed to work together to provide the dispersion effect. Microstructural and optical characterization of powders and as-fabricated transparent ceramics was employed to evaluate the sintering behavior of powders. The nanopowders calcined at 1250 °C had weakly agglomerated morphology with the mean particle size of ~140 nm and exhibited excellent sinterability. The in-line transmittance of Y 2 O 3 ceramic of 1 mm thickness that was vacuum sintered at 1800 °C for 8 h without any sintering additives reached 78.7% at 1064 nm.
研究领域:
材料科学
·
陶瓷工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 29
·73534-73547
·
IF 5.8
Lin Sudan,Xu Yongzhi,Fu Chen,Zhang Haifeng,Kong Qiaoping,He Haoran,Liu Siyuan,Shi Xueqing,Zhao Dandan
Recently, selective phosphorus removal from aqueous solution has been a highly desirable strategy to combat eutrophication due to the increasingly stringent phosphorous emission standards. However, conventional adsorbents pose the limitations in phosphate removal suffering from lack of selectivity and stability under complicated condition and poor separation. In this study, novel Y 2 O 3 based calcium-alginate (Y 2 O 3 /SA) beads of feasible stability and highly selectivity towards phosphate by encapsulating Y 2 O 3 nanoparticles inside calcium-alginate beads via Ca 2+ controlled gelation process was synthesized and characterized. The phosphate adsorption performance and mechanism were investigated. In general, a high selectivity among co-existing anions was found with co-existing anion concentration up to 62.5 times of the phosphate concentration. Additionally, phosphate adsorption by Y 2 O 3 /SA beads exhibited stable performance over a wide pH range between 2 and 10, while reaching the maximum adsorption capacity at pH 3 (48.54 mg-P/g). The value of point of zero charge (pH pzc ) of Y 2 O 3 /SA beads was approximately 3.45. Pseudo-second-order and Freundlich isotherm models can well accord with kinetics and isotherms data. The FTIR and XPS characterizations analyzed that inner-sphere complexes were proposed to be the major contributor of Y 2 O 3 /SA beads for phosphate removal. In conclusion, Y 2 O 3 /SA beads as the mesoporous material exhibited excellent stability and selectivity towards phosphate removal.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Pingsheng Lai,Xuan Ge,Caijuan Shi,Jianqiang Li,Fan Yang,Wenquan Lu,Jianguo Li,Qiaodan Hu
Despite its significance in both fundamental science and industrial applications, the glass-forming transition in the Al 2 O 3 -Y 2 O 3 (AY) refractory system is not yet fully understood due to the elusive structure evolution upon cooling. Here, atomic-scale structural changes in AY-bearing melts with different compositions and temperatures are tracked by employing in situ high-energy synchrotron X-ray diffraction and empirical potential structure refinement simulation. We find that the glass-forming abilities (GFA) of AY-bearing melts are intriguingly correlated with the dependence of melt structure on temperature. In the case of the Al 2 O 3 and Y 3 Al 5 O 12 (YAG), the observed large structural changes from superheating to undercooling melt (i.e., higher temperature susceptibility) correspond to a low GFA. Conversely, the 74Al 2 O 3 –26Y 2 O 3 (AY26) melt, with the smallest temperature susceptibility, exhibits the highest GFA. Simulation models illustrate that the temperature susceptibility of melt is associated with its atomic arrangement, especially the stability of cation-cation pairs. A balanced network (in AY26 melt), where the unsteady OAl 3 tri-clusters are minimized and steady apex-to-apex connections between adjacent network units are abundant, contributes to stabilizing cationic interactions. This, in turn, fosters the formation of large-sized Al-O-Al rings, which topologically facilitates the subsequent glass-forming transition. Our findings provide new structural insight into the GFA of AY-bearing melts and may expand to other unconventional glass-forming systems to accelerate glassy materials design.
研究领域:
材料科学
·
物理化学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70456
·
IF 3.8
Zhenyu Zhang,Xincheng Cai,Mao Deng,Junjing Duan,Xingjian Xu,Yanli Shi,Rui Duan,Kailei Lu,Jianqi Qi
This study presents a simplified self-esterification galactose-assisted sol–gel combustion synthesis for Y 2 O 3 –MgO composite nanopowders, eliminating the need for additional chelating agents. Galactose serves as both fuel and structure-directing agent, producing highly uniform, fine powders (17 nm). Subsequent hot-pressing yielded fully dense ceramics with exceptional performance: high in-line transmittance (>80% [2.3–6.3 µm]; maximum transmittance >84%, approaching the theoretical value ∼86%), excellent phase homogeneity (phase distribution coefficient α f of Y 2 O 3 = 96.64%, α f of MgO = 95.62%; a value of α f closer to 1 corresponds to improved phase homogeneity, a stronger pinning effect, and a finer grain size, resulting in enhanced properties of the Y 2 O 3 –MgO), superior Vickers hardness (12.1 ± 0.3 GPa), and fracture toughness (2.5 ± 0.4 MPa·m 1/2 ). This work establishes galactose sol–gel combustion as a facile, effective route for tailoring powder morphology, enabling the fabrication of transparent Y 2 O 3 –MgO composites with outstanding integrated properties for demanding optical applications.
研究领域:
材料科学
·
陶瓷
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光学材料
·
纳米材料
·
溶胶-凝胶工艺
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Xue-Qing Zhan,Jia-Min Xu,Xiaoge Wang,Xiaohui Li,Jing Ju,Qin Ye,Yi-Jie Zhang,Fang-Chang Tsai,Ning Ma
Conventional ceramics often require energy-intensive, high-temperature processing, which constrains their sustainability. Herein, we report an ionic melt-induced liquid-phase-assisted process to synthesize ZrO2–Y2O3–SiO2–Li2O glass-ceramics, reducing typical processing temperatures by ∼400 °C without cold isostatic pressing. By leveraging ZrO2–Y2O3 as the primary network former and SiO2–Li2O as an ionic flux, we achieve tailored glass transition (Tg = 866 °C) and crystallization (Tc = 1066 °C) temperatures. This enables low-temperature crystallization while enhancing the ionic conductivity. Phase analysis confirms coexisting tetragonal and monoclinic ZrO2, Li2SiO3, and residual SiO2–Li2O glass, with minimal nonbridging oxygen content contributing to optimized mechanical properties. The optimal composition (ZrO2–Y2O3:SiO2–Li2O = 1:1.14, molar ratio) delivers exceptional Vickers hardness (8.25 GPa), Young’s modulus (109.2 GPa), and ionic conductivity. This work outlines a sustainable pathway for the development of advanced glass-ceramics and solid electrolytes with potential implications for structural materials, functional devices, and solid-state batteries.
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Yong Wei,Ling-Zi Tao,Hui-Ling Yang,Xiao-Yun Sun,Cheng-Yang Wang,Lai-Ma Luo
To address the high brittleness and insufficient toughness of Titanium–Zirconium–Molybdenum (TZM) composites, this study successfully prepared a TZM-0.5 wt% Y 2 O 3 composite with high ductility using spark plasma sintering (SPS), and systematically investigated the influence of sintering temperature on its tensile properties and fracture mechanism. At 1900 °C, the composite grains are refined to 3.75 μm, the relative density reaches 99.2 %, and the hardness is 214.2 HV 0.2 . Its room-temperature yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) reach 548 MPa, 631 MPa, and 18 % respectively, with a strength-ductility product (PSE) of 11.4 GPa·%, exhibiting a ductile fracture feature dominated by microporous aggregation. Compared with the samples sintered at 1800 °C, those sintered at 1900 °C have finer and more uniform grains, as well as higher density. However, the mechanical properties of the samples sintered at 2000 °C show a slight decrease, which is caused by the over-sintering behavior. The composite sintered at 1900 °C exhibits the optimal matching between microstructure and mechanical properties. Its excellent performance stems from the synergistic effect of dispersion strengthening by nanoscale second phase particles within grains and grain refinement strengthening.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shengdong Cai,Fangyu Gan,Lichun Cheng,Qingrong Yao,Jiang Wang
Balancing dielectric attenuation and impedance matching is essential for developing efficient MXene-based EMW absorbers because an excessively developed conductive network may deteriorate impedance matching and hinder electromagnetic wave penetration. Herein, Ti 3 C 2 T x MXene/Y 2 O 3 /C composites were prepared through in situ solvothermal assembly followed by pyrolysis. By increasing the Ti 3 C 2 T x MXene feed fraction, the dielectric response and impedance-matching behavior of the composites were systematically regulated. Structural analyses confirmed the formation of crystalline Y 2 O 3 , carbonaceous domains, and MXene-based heterostructures with mesoporous features. The composites exhibited composition-dependent and non-monotonic absorption behavior. MY-3(Nominal MXene-to-precursor feed ratios of 2:5) composite delivered the strongest absorption intensity with a minimum RL of −49.4 dB, while MY-4(Nominal MXene-to-precursor feed ratios of 1:2) composite achieved the broadest EAB of 7.2 GHz. The enhanced absorption performance is attributed to the regulated conductive network, interfacial polarization at MXene/Y 2 O 3 /C heterointerfaces, dipole polarization from polar bonds and oxygen-containing groups, and improved impedance matching. Radar cross-section simulations further verified the scattering suppression capability of the optimized coatings. This work demonstrates that Y 2 O 3 /C-assisted dielectric regulation is an effective strategy for improving broadband absorption in MXene-based dielectric absorbing materials.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Minhao Shen,Renli Fu,Xinya Xu,Xuhai Liu,Kuang Sun,Wei Xu,Yanling Jiang,Zhe Zhao
The additive manufacturing technology based on digital light processing (DLP) has made it possible to construct silicon nitride (Si 3 N 4 ) ceramics with complex structures. However, due to the high ultraviolet light absorbance and low sintering activity of Si 3 N 4 powders, it is challenging to realize tightly layer bonded and dense Si 3 N 4 ceramics via the DLP technique. Herein, we proposed to coat the Si 3 N 4 particle surface with magnesium oxide and yttrium oxide (MgO-Y 2 O 3 ) layer through the co-precipitation method, in an attempt to achieve the dual purposes of increasing the curing depth and promoting densification. The MgO-Y 2 O 3 layer can not only reduce the refractive index difference between the Si 3 N 4 powder and the photosensitive resin to improve the curing depth, but also serve as the sintering assistance to generate the liquid phase and promote densification. When the coating content of MgO-Y 2 O 3 is 10 wt.%, the curing depth of the ceramic slurry can be increased to 107 μm, which is 33% higher than that of pristine powders. This strategy can provide a simple and effective method to construct advanced Si 3 N 4 ceramics via DLP 3D printing.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 2
·1362-1369
·
IF 2.986
Xiaokai Li,Yangyang Xu,Xiaojian Mao,Qiangqiang Zhu,Junxi Xie,Minghui Feng,Benxue Jiang,Long Zhang
Highly transparent ZrO 2 -doped Y 2 O 3 ceramics were successfully synthesized using the hot isostatic pressing (HIP) process. The effects of the ZrO 2 content on the sintering behaviors , optical transmission spectra, Vickers hardness , grain size, size distribution, and Raman spectra were determined. The results indicated that decreased ZrO 2 content could promote increased transmittance, red-shifted infrared cutoff wavelength , increased thermal conductivity , decreased Vickers hardness, and increased lattice ordering. According to the optical transmission spectra, the optimized ZrO 2 content was 0.50 at%, at which point the ceramic exhibited a larger pre-sintering temperature range of 1650–1750 °C and the average grain size of 3.35 µm at 1750 °C. The grain size was significantly decreased at lower pre-sintering temperatures. Furthermore, a moderate Vickers hardness of 8.42 GPa and high thermal conductivity of 10.85 W/m K at room temperature were obtained for the optimized ceramic.
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DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2014
·Vol. 25
·期 6
·869-873
·
IF 1.178
Rui Chen,Tie-Hong Chen
Mesoporous single crystal-like Y 2 O 3 nanocubes have been prepared through a coordination-based self-assembly process. Firstly, a uniform nanocube-like Y-lysine precursor was simply prepared with hydrothermal treatment. After the simple thermal treatment process, nanocube-shaped yttrium oxides with the morphology inherited from the Y-lysine precursor were successfully prepared. The phase, morphology, size and crystalline structure were well characterized by XRD, SEM and TEM. N 2 adsorption–desorption demonstrates the mesoporous characteristics of the Y 2 O 3 nanocubes, showing a relatively high surface area of 60 m 2 /g.
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DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
Zhuang-zhi WU,Na ZHAO,Yao LU,Hai-lang LIU,Bo-hua DUAN,Xin-li LIU,De-zhi WANG
The morphology and size of second phase greatly influence the strengthening effect on oxidation dispersion strengthened Mo alloys. In this work, a novel nanostructuring strategy is adopted to modify the second phase of Y 2 O 3 , and the corresponding effects of particle shape and size on mechanical properties of sintered Mo-Y 2 O 3 alloys were investigated. It is found that spherical particles with sizes below 200 nm are preferred due to the dominant intragranular distribution of second phases associated with better strengthening effect originating from dislocation pinning. With smaller particle size of Y 2 O 3 nanospheres (105 nm), the tensile strength of corresponding Mo alloy is enhanced by about 43.8%, much higher than that (8.3%) reinforced by second phase nanospheres with larger particle size (322 nm). Meanwhile, with similar particle size (around 100 nm), the spherical shape exhibits better strengthening effect than the one reinforced by one-dimensional rod-like second phase.
研究领域:
材料科学
·
冶金学
·
机械工程
·
纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）