CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Kai Luo,Wensheng Zhang,Jiayuan Ye,Jun Li,Zhongyuan Lu,Xuehong Ren
The physical and microscopic properties of γ-C 2 S and β-C 2 S under hydration, carbonation , and hydration–carbonation cycle reactions were investigated. The hydration–carbonation cycle reaction facilitated the carbon sequestration of C 2 S, and the generation of CaCO 3 filled the pores of the matrix and enhanced the matrix density in the carbon fixation reaction process. In the subsequent hydration and reaction process, the formation of hydration products increased the number of pores in the matrix and reduced the matrix density. Post-hydration, γ-C 2 S slurry became powder and had no mechanical strength . However, after carbonation reaction and two carbonation–hydration cycles, γ-C 2 S exhibited better mechanical properties than β-C 2 S.
研究领域:
材料科学
·
硅酸盐化学
·
建筑材料
·
碳捕集与封存
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Nano Energy
·
2014
·
IF 10.211
Xiaolei Jiang,Huayun Xu,Jing Liu,Jian Yang,Hongzhi Mao,Yitai Qian
Hierarchical mesoporous Li 2 Mn 0.5 Fe 0.5 SiO 4 consisted of nanoparticles or nanoplates has been successfully synthesized for the first time by a hydrothermal method . Their carbon-coated composites are obtained by a heat treatment in the presence of citric acid. These composites were characterized by powder X-ray diffractometry, scanning and transmission electron microscopy , Raman spectroscopy , and thermogravimetric analysis . The lithium storage capacity and cycling performance of the optimized Li 2 Mn 0.5 Fe 0.5 SiO 4 /C composite are greatly enhanced when tested as a cathode material in lithium-ion batteries (LIBs). It exhibits a discharge capacity of 125 mAh g −1 after 60 cycles at a rate of 0.1 C. This superior electrochemical property could be ascribed to high purity and mesoporous structure of Li 2 Mn 0.5 Fe 0.5 SiO 4 , which greatly enhances the electronic conductivity as well as the diffusion coefficient of lithium ions .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固体化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 45
·期 3
·3710-3714
·
IF 3.057
Yue Hu,Zhen Xiao,Huanping Wang,Can Ye,Yuqian Wu,Shiqing Xu
Porous CaSiO 3 ceramics were prepared via a solid-state reaction method using CaCO 3 and SiO 2 as raw materials and active carbon as a pore-forming agent. The results indicated that porous CaSiO 3 ceramics could be obtained under a low sintering temperature of 1320 °C. The addition of active carbon significantly affected the volume density, microstructure, pore size distribution and mechanical strength of porous CaSiO 3 ceramics. With the increase of active carbon content, the volume density decreased, meanwhile the pore size and porosity increased gradually. Besides, the three-point bending tests demonstrated that the mechanical strength was decreased with increasing active carbon content. However, all the porous ceramics still exhibited high mechanical strength. These results implied that the increase of active carbon content not only enlarged the pore size and enhanced the porosity, but also kept a remarkable mechanical strength of porous CaSiO 3 ceramics. Therefore, these rationally designed CaSiO 3 porous ceramics will be a highly potential material in various applications due to its high mechanical strength, low sintering temperature and narrow pore size distribution.
研究领域:
材料科学
·
生物陶瓷
·
组织工程
·
生物医学材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Tianquan Liang,Zhihua Huang,Menghao Li,Wantong Xiao,Huan He,Aoping He,Xiyong Chen,Nengneng Luo
The thermochemical reaction behaviors between Y 2 O 3 and calcium-magnesium-aluminosilicate (CMAS) at 1250 °C∼1400 °C were investigated. A continuous-dense reaction layer mainly composed of Y-apatite phase quickly forms within 15 min, and its slow increasing thickness depends on the molten CMAS infiltration along the Y-apatite grain boundaries, the dissolution of the Y-apatite phase into the melt, the inhibiting effect on the CMAS penetration, and the reaction time and temperature. The CMAS crystallization occurs due to the change of chemical composition and the formation of other reaction products. The dense reaction layer shows good resistance to the molten CMAS infiltration.
研究领域:
材料科学
·
无机非金属材料
·
高温材料
·
陶瓷涂层
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Qing Cen,Qiaoyuan Gao,Chenlu Zhang,Yingqi Liu,Qi Wang,Qi Wang
In this study, visible-light-active iron tungstosilicate (FeSiW) was fabricated via solvothermal method . Fe 3+ was applied as counter ion to precipitate with silicotungstic acid (H 4 SiW 12 O 40 ) in methanol solution. It can be observed from FT-IR spectra that the Keggin structure of SiW 12 O 40 4− was well maintained in FeSiW. Besides, the effect of different initial molar ratios of Fe 3+ to H 4 SiW 12 O 40 was investigated (from 4:1 to 4:4). By photoelectrochemical characterizations, such as photocurrent response and Mott-Schottky (M-S) plots, easiest generation of electron-hole pairs and lowest charge transfer resistance can be observed on FeSiW with initial molar ratio of 4:3. Moreover, FeSiW with 4:3 ratio also displayed highest activity for photocatalytic reduction of Cr(VI), despite of the largest band gap (ca. 2.71 eV). The lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) of the optimized FeSiW were estimated to be +0.03 V and 2.74 V vs NHE, respectively, which were thermodynamically feasible for Cr(VI) reduction and H 2 O oxidation . Even under acidic condition (pH 3), the optimized photocatalyst displayed good stability in cyclic runs. Therefore, the present study opens a new way for heterogeneous polyoxometalates as efficient photocatalyst for environmental application.
研究领域:
环境化学
·
材料科学
·
光催化
·
无机化学
·
污染治理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 46
·期 3
·2845-2852
·
IF 3.45
Quansheng Wu,Quan Zhao,Penghui Zheng,Wenbo Chen,Dongfeng Xiang,Ziyu He,Qiang Huang,Jianyan Ding,Jiangcong Zhou
Lithium-containing silicate compounds have attracted so much attention in recent years for applications in energy storage and illumination source due to their rigid structure and good electrical conductivity . In this study, a Eu 3+ doped lithium-containing silicate red phosphor , Li 2 Ca 4 Si 4 O 13 :Eu 3+ , was explored by using structural computational simulations and systematic experiments for multifunctional applications. As a result, due to the quite non-central symmetry of the Ca 2+ sites (C 1 symmetry), the strong 4f-4f excitations in near ultraviolet region were observed. Under near ultraviolet and cathode ray light excitation , Li 2 Ca 4 Si 4 O 13 :Eu 3+ phosphor has an efficient red emission with good thermal stability and ageing resistance. Furthermore, Li 2 Ca 4 Si 4 O 13 :Eu 3+ phosphor exhibits a concentration-sensitive behavior induced by the change of site symmetry. The results show that it is feasible to develop near-ultraviolet and cathode ray light excited red phosphors in lithium-containing silicate compounds.
研究领域:
材料科学
·
无机化学
·
固体物理
·
光电功能材料
·
发光材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2014
·Vol. 26
·期 2
·884-890
·
IF 1.966
Li Rui,Wang Yan-ze,Mao Zhi-yong,Wang Da-Jian
A remote phosphor coating by using Sr 3 (Al,Si)(O, F) 5 :Ce 3+ (SASF:Ce 3+ ) on glass substrate was prepared by a simple and convenient screen printing method. The crystalline phase and the distribution of SASF:Ce 3+ crystals in coating were investigated by XRD and SEM, respectively. The scattering light and absorption light properties of remote phosphor coating with different thicknesses were discussed through Lambert–Beer’s law. The relationship between luminous efficiency and absorption coefficient was demonstrated. White light emitting diode prototype fabricated with blue chip and the prepared patterned SASF:Ce 3+ remote phosphor in this work showed excellent performances, opening a cost-effective process to generate planar white light.
研究领域:
材料科学
·
光学工程
·
发光材料
·
固态照明
·
功能涂层
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Jiang Wu,Haowen Bai,Wenjie Qu,Guanying Cao,Yanjie Zhang,Jingjie Yu
CsPbBr 3 quantum-dot borosilicate microcrystals and Eu 3+ -doped CsPbBr 3 quantum-dot microcrystals with different concentrations of Eu 3+ are successfully prepared by high temperature melting. The particle morphology of the microcrystals is characterized by scanning electron microscopy (SEM). The fluorescence characteristics are analyzed by fluorescence spectroscopy and CIE chromaticity coordinates . In this research, CsPbBr 3 quantum dots are effectively coated with borosilicate microcrystals to improve the stability of CsPbBr 3 quantum dots while ensuring its strong green emission at 517 nm. The energy transfer from CsPbBr 3 quantum dots to Eu 3+ occurs after doping. When changing the concentration of Eu 3+ , the emission peaks of perovskite broaden and blue shift occurs (517 nm→474 nm). The CIE color coordinate moves from (0.0807, 0.7200) to (0.4537, 0.2724). Therefore, the continuous adjustment of solid perovskite materials from green light to blue light and then to red light region is realized.
研究领域:
材料科学
·
纳米光学
·
无机非金属材料
·
光电子学
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·22064-22071
·
IF 12.732
Wenda Zhang,Jie Feng,Fengqi Lu,Alberto J. Fernández-Carrión,Hui Fu,Xiaojun Kuang
Na-doped melilite-type silicate Sr2MgSi2O7 was reported to display high oxide ion conductivity. In this work, through multiple complementary techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, solid-state 29Si and 23Na nuclear magnetic resonance spectroscopy, and DFT calculations of defect formation energies, we found that it is hard to replace Sr with Na in Sr2MgSi2O7, and the Sr2−xNaxMgSi2O7−0.5x compositions formed mixed crystalline Sr2MgSi2O7 and Na-containing glassy phases. AC impedance spectroscopy measurements indicated that the ionic conduction in Sr2−xNaxMgSi2O7−0.5x could be from Na+ ions in the glassy phase, instead of the oxide ions.
研究领域:
材料科学
·
固体离子导体
·
无机非金属材料
·
能源材料
·
电化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Zhiyong Mao,Jingjing Chen,Liang Sun,Qifei Lu,Dajian Wang
(Ba,Sr) 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ phosphors with 430/505/660 nm tri-bands or 430/660 nm dual-bands emission were demonstrated in this work by controlling the appearence or not of green emitting intermediate phases, (Ba,Sr) 2 SiO 4 :Eu 2+ . Through varying the stoichiometric amount of SiO 2 in precursor, the coexistence of green emitting intermediate phase tended to be sensitive and diversified. Laser Microzone Raman spectrum was employed to look insight into the lattice stretch and the preferential occupation sites of Ba 2+ ions in Sr 3 MgSi 2 O 8 lattices. The local structure and the crystal field of Eu 2+ luminescent centers were found to be disturbed by distorted arrangement of cross-linked [MgO 6 ] octahedra and [SiO 4 ] tetrahedra. This mechanism approach provided some new insights to further understanding the adjustment strategy of green emitting intermediate phases in (Ba,Sr) 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ phosphor potentially applied as red/blue dual-bands emitting or red/green/blue tri-bands emitting materials.
研究领域:
材料科学
·
无机化学
·
发光材料
·
固体物理
·
光电子学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2019
·
IF 2.29
Qiuying Chang,Hao Zhang,Rongqin Gao
A new nanocomposite was prepared by combining Magnesium silicate hydroxide (MSH) with decomposed gelatin under one-pot hydrothermal synthesis conditions. The chemical reaction process involved the MSH formation and the gelation decomposing into carbonaceous species. The characterization of resultant nanoparticles revealed that the nanocomposite was a combination of hydrogenated amorphous carbon and MSH. And the addition of gelatin during synthesis increased the content of granular nanoparticles in nanocomposite samples. The results of tribological experiments of MSH modified by carbon (MSH@C) as lubricant additive showed that the nanocomposites presented much better anti-wear property and friction stability than the MSH without modification. Thus MSH@C nanocomposites were expected to be a promising candidate for lubricant additives. The amorphous carbon film was detected on the wear scar which might account for the significant tribological property.
研究领域:
材料科学
·
纳米科技
·
表面工程
·
摩擦学
·
复合材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 23
·32641-32647
·
IF 4.527
Wei Liao,Yongqiang Tan,Chaowen Zhu,Zhen Teng,Peng Jia,Haibin Zhang
Multi-components and equimolar rare earth monosilicates, (Y 1/3 Dy 1/3 Er 1/3 ) 2 SiO 5 , (Y 1/3 Dy 1/3 Lu 1/3 ) 2 SiO 5 , (Y 1/4 Dy 1/4 Ho 1/4 Er 1/4 ) 2 SiO 5 and (Yb 1/4 Dy 1/4 Ho 1/4 Er 1/4 ) 2 SiO 5 , were prepared by solid-state reactions and the following hot-pressing. Dense microstructures with uniform elemental distributions were obtained for all samples. These investigated multi-components monosilicates exhibit low thermal conductivities and similar coefficients of thermal expansion with SiC. Moreover, they exhibit high corrosion resistances in 1400 °C water vapor , especially, four-components (Y 1/4 Dy 1/4 Ho 1/4 Er 1/4 ) 2 SiO 5 and (Yb 1/4 Dy 1/4 Ho 1/4 Er 1/4 ) 2 SiO 5 experienced almost invariable weights after small weight losses during the initial 0.5 h. All those results indicate that multi-components rare earth monosilicates are promising candidates of environmental barrier coatings for SiC/SiC composites.
研究领域:
材料科学
·
无机非金属材料
·
高温防护涂层
·
陶瓷基复合材料
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）