Frontiers in Materials
·
2022
·
IF 3.985
Chang Shuangshuang,Jia Yanhong,Du Xin,Guo Shaoqiang
Pyroprocessing of spent nuclear fuels uses the LiCl–KCl molten salt as an electrolyte, which contains dissolved fission products and can be very corrosive to the structural alloys. This study investigates the effect of EuCl3 on the corrosion behavior of four commercial alloys: Haynes C276, Inconel 600, Incoloy 800, and 316L stainless steel. Static immersion tests and electrochemical polarization measurements were carried out in molten LiCl–KCl salts with and without EuCl3 additives at 500°C. The results showed that the presence of EuCl3 caused the severe dissolution of Ni, Fe, and Cr from alloys, accompanied by the cathodic reduction of EuCl3 to EuCl2. All alloys suffered from intergranular dissolution and cracking, with additional pitting and void attacks for Incoloy 800 and 316L stainless steel.
研究领域:
材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Xiuwei Sun,Xue Bai,Qian Wang,Ying Lu,Shuxia Liu
Most reported proton-conducting materials use water molecules as media for proton transport, but their low operating temperatures (below the boiling point of water) and humidity-dependent conductivity limit their extensive applications. This motivated researchers to explore high-temperature proton-conducting materials employing nonaqueous media. The acid–base adduct HPW-SA formed by Keggin-type phosphotungstic acid (H3PW12O40, abbreviated as HPW) and sulfamic acid (SA) shows high proton conductivity in the high-temperature region (160–190 °C), owing to its proton mobility remarkably enhanced by its solid–liquid transition. Inspired by this, we encapsulated the HPW-SA adduct into the cages of MIL-101 by the postsynthetic method to prepare the composite HPW-SA@MIL-101, aiming at taking full advantage of the proton conduction feature of the HPW-SA adduct while avoiding the problems of flowing away and corrosion caused by the independent use of HPW-SA adduct. As expected, HPW-SA@MIL-101 exhibits high proton conductivity (0.85 × 10–3–1.1 × 10–3 S cm–1) in the range of 160–190 °C. Its proton transfer activation energy (Ea) is 0.58 eV in the range of 160–190 °C, which indicates that proton migration is dominated by the diffusion effect following a vehicle mechanism. In addition, the proton conductivity of HPW-SA@MIL-101 did not decrease after six cycles of heating and cooling tests, showing good repeatability and stability.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Haiping Zhou,Gang Wang,Liping Wang,Zhenhua Zhang,Huiliang Hou,Qifan Zhong,Jin Xiao
Industrial alumina was used as raw material in the high-temperature calcination process, and AlF 3 was introduced to promote mass transfer in the gas phase. The calcination environment, such as sealing, calcination temperature, and holding time, was analyzed to enhance the effect of AlF 3 to promote the crystal growth of alumina. Here, round-like flake α-Al 2 O 3 with an average particle size (D50) of about 18–38 μm were obtained at low dosages (0.1–0.4 wt%) of AlF 3 . The morphology and particle size of α-Al 2 O 3 were further adjusted by introducing different types of micron-scaled nuclei as template inducers. Round-like flake and spherical-like large single crystals α-Al 2 O 3 with an average particle size greater than 35 μm were obtained, respectively, with 65 wt% of 15 μm flake and 10 μm bulk α-Al 2 O 3 nuclei added. In addition, the regulation mechanism of AlF 3 and nuclei on alumina crystal growth was also discussed. Finally, a theoretical basis and technical support for preparing high-performance, low-cost, and high thermal conductivity alumina fillers was provided.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Chengwen Gu,Fanchen Sun,Qitong Wang,Jiahui Li,Yi Zhao,Yunhe Zhang,Shouhai Zhang,Xigao Jian,Zhihuan Weng
Poly(aryl ether) (PAE) dielectrics have captured widespread interest in the domain of film capacitors primarily due to their exceptional high-temperature endurance, advantageous film-forming capabilities, and superior mechanical attributes. However, the conventional PAEs had a complicated film-forming process and low discharge energy density. In order to solve this problem, a poly(phthalazinone ether sulfone) (PPES) with phthalazinone structures is synthesized. Compared to the commercial polysulfone, the PPES exhibits significantly higher discharge energy density (Ue) and breakdown strength both at room temperature and elevated temperature. In particular, the Ue value of PPES (3.66 J/cm3) at 150 °C and 500 MV/m is even superior to that of commercially available bi-oriented polypropylene dielectric films, which are only 2.71 J/cm3 at room temperature and 450 MV/m. This investigation has demonstrated that the PPES films with phthalazinone structures are highly promising for energy storage under harsh conditions.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2023
·Vol. 9
·期 10
·805
·
IF 4.6
Fengbao Liu,Jinsheng Sun,Xianbin Huang,Yuan Geng
Currently, conventional polymeric filtrate reducers with high-temperature resistance for use in drilling fluids have high molecular weights, which greatly affects the rheological properties. Therefore, to address the challenges in regulating the rheology and filtration performance of high-density drilling fluids at high temperatures, it is essential to develop low-molecular-weight filtrate reducers with high-temperature resistance. In this study, a low-molecular-weight filtrate reducer with high-temperature resistance (LMF) was prepared via free radical polymerization from acrylamide and 2-acrylamido-2-methyl-1-propanesulfonic acid as monomers, tertiary dodecyl mercaptan as a chain transfer agent, and ammonium persulfate as the initiator. LMF was then characterized by infrared spectroscopy, thermogravimetric analysis, and gel permeation chromatography. The obtained filtrate reducer exhibits a weight-average molecular weight (Mw) of 3819 and an initial thermal decomposition temperature of 300.7 °C, indicating good thermal stability. The effects of LMF dosage, temperature, and NaCl dosage on the rheology and filtration performance of mud samples were also investigated, and the mechanism of action was revealed by zeta potential, particle size distribution, scanning electron microscopy, and adsorption measurements. The results reveal that LMF increases the mud sample viscosity and reduces its filtration. For example, the filtration of the mud sample with 2 wt% LMF was 7.2 mL, a reduction of 70% compared to that of a blank mud sample. Further, after aging at 210 °C for 16 h, the filtration of the same sample was 11.6 mL, and that of a mud sample with 2 wt% LMF and 35 wt% NaCl after aging at 180 °C for 16 h was 22 mL. Overall, we have reported a scheme to prepare a low-molecular-weight filtrate reducer with high-temperature resistance and superior filtrate-reducing effects, laying the foundation for the investigation and development of low-molecular-weight filtrate reducers.Keywords:low molecular weight;high-temperature resistance;salinity tolerance;filtrate reducer
研究领域:
石油工程
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材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2024
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IF 9.8
Jianglong Chang,Yichao Wang,You Li,Yuefeng Gao,Hongquan Yu,Yongze Cao,Xizhen Zhang,Baojiu Chen,Sai Xu
Fluorescence thermometry has garnered significant attention for its noninvasive, remote, highly sensitive, and rapid temperature measurement capabilities. However, achieving superior sensitivity at high temperatures remains a persistent challenge. Herein, a series of Rb 2− x Cs x HfCl 6 : y%Te 4+ perovskites are synthesized to investigate the impact exerted by A-site regulating regarding the luminescence efficiency and temperature-responsive capabilities. Te 4+ doping significantly enhances luminescence intensity, with the broadband yellow light resulting from electron–phonon coupling within the soft lattice, driven by self-trapped exciton emission. Furthermore, A-site regulation demonstrates that increasing Cs⁺ content induces enhanced Jahn–Teller distortion, thereby boosting luminescence efficiency. However, the pure Rb sample exhibits the lowest thermal activation energy, as the temperature rises, increased phonon-exciton coupling and the defect activity accelerate the nonradiative recombination, drastically decreasing fluorescence lifetime by two orders of magnitude from 300 to 390 K. Utilizing this exceptional thermal sensitivity, a lifetime-based fluorescence thermometer is developed, attaining a breakthrough relative sensitivity reaching 20.69% K −1 at 390 K, with high repeatability across multiple heating and cooling cycles. Additionally, a high-temperature warning system for lubricating oil pipelines is designed, demonstrating robust monitoring capabilities. This work offers a new perspective on developing highly sensitive thermometers that utilize halide perovskites for high-temperature applications.
研究领域:
材料科学
·
光学
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测温学
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化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Daoming Wu,Jiayi Feng,Mingli Lai,Jianhui Ouyang,Dandan Liao,Wanwen Yu,Guibin Wang,Fuliang Cao,Douglass F. Jacobs,Shucai Zeng
Higher flavonoids yield can increase economic and industrial efficiency of Ginkgo biloba Linn. leaf-harvesting plantation. However, high-temperature limits ginkgo leaf flavonoids production in warm climates regions. Few studies have reported on methods that may improve ginkgo leaf flavonoids yield by increasing leaf productivity and flavonoids content simultaneously. This study investigated the effects of combined application of fertilizer for bud growth (FBG) and fertilizer for leaf growth (FLG) on the growth, productivity and flavonoids accumulation of ginkgo leaves, aiming to optimize fertilization schemes for improving leaf flavonoids yield of ginkgo in high-temperature regions. Results revealed that FBG significantly improved twig bud break, twig number, and twig elongation, and increased leaf number (up to 446±27.38 per four-year-old seedling) in spring. Topdressing FLG in summer moderated the decline of leaf SPAD (soil and plant analyzer development) values, modulated leaf nutrient content, and significantly increased single leaf dry weight, antioxidative enzyme activities, and leaf flavonoids content. Dry leaf productivity, flavonoids content, and flavonoids yield of four-year-old ginkgo with combined application of FBG and FLG was 103±16.05 g/plant, 6.54±0.13 mg/g, and 615.71±58.22 mg/plant, respectively, which were comparably high in reference to those in the central production region. These results suggest that the integrated application of FBG and FLG is an effective approach for improving ginkgo leaf flavonoids yield in high-temperature regions.
研究领域:
植物学
·
药用植物学
·
农学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Luyao Wang,Zhe Bai,Xiangwen Zhang,Guozhu Li
Hydrodesulfurization (HDS) is an important technique that is widely adopted in the petroleum industry to remove harmful sulfur compounds for environmental protection. MoS2 is the most commonly employed HDS catalyst but tends to stack due to its high surface energy. Active MoS2 nanosheets are anticipated to be well supported for preventing aggregation and increasing accessibility. In the current study, two-dimensional Ti3C2 MXene is utilized as a novel support to controllably anchor MoS2 nanosheets for efficient HDS. The composite of Ti3C2-supported CoMoS2 (CoMoS2/Ti3C2) with a 3D interconnected network was successfully constructed by a facile, one-step hydrothermal method. Detailed characterizations showed that MoS2 nanosheets vertically grew in situ on and between the layers of Ti3C2 MXene. CoMoS2/Ti3C2 possesses a well-defined open structure with a larger specific surface area and a higher proportion of CoMoS active phase compared with unsupported CoMoS2. As catalyzed by CoMoS2/Ti3C2, the reaction rate constant was effectively increased to 2.8 times that on CoMoS2 for the HDS of dibenzothiophene. CoMoS2/Ti3C2 also showed good stability in a harsh high-temperature reaction environment.
研究领域:
材料科学
·
催化化学
·
能源化工
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Guangyang Wang,Shaobai Sang,Qinghu Wang,Yawei Li,Heng Wang,Tianbin Zhu
MgCr 2 O 4 is a potential infrared radiation material for high-temperature furnaces energy-saving. However, poisonous Cr 6+ is easily formed in MgCr 2 O 4 -based materials during the preparation process, which is harmful to the environment. In this study, TiO 2 -doped MgCr 2 O 4 materials were prepared at 1600 ℃ by solid-phase sintering method. The effects of TiO 2 as a dopant on the infrared radiation properties of MgCr 2 O 4 and the leaching concentration of Cr 6+ were investigated, and the mechanism was discussed. Results show that the emissivity of MgCr 2 O 4 in both near-infrared and mid-infrared bands is enhanced with the increase of TiO 2 content, and the specimen MgCr 1.6 Ti 0.4 O 4.2 has the highest average emissivity in the 0.8–2.5 μm and 2.5–10.0 μm bands, which are 0.82 and 0.87, respectively. Moreover, the addition of TiO 2 significantly reduces the Cr 6+ content of MgCr 2 O 4 , with the Cr 6+ removal rate of MgCr 1.6 Ti 0.4 O 4.2 up to 84.2 %.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Yang Lyu,Hui Tang,Guangdong Zhao
Polymer-derived ceramics (PDCs), such as silicon oxycarbide and its derivatives, show an exceptional high oxidative stability under extreme conditions. A novel multicomponent silicon oxycarbide system tailoring with transition metal (hafnium) and boron is fabricated by sol-gel and solvothermal method. Amorphous SiHBOC was formed via the condensation of Si–OH, B–OH and Hf–OH groups, respectively, and the bonds of Si–O–Hf and Si–O–B– were detected by FTIR and XPS characterization. After high-temperature pyrolysis, the precursor is converted to a rigid ceramic material that has an 85.8 wt % ceramic yield of SiHfBOC. We investigate the oxidation resistance performance of SiHfBOC using the isothermal oxidation test at 1400 °C. The results showed that the oxidative stability of SiHfBOC was significantly superior to than those of SiBOC ceramic.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACTA MATERIALIA
·
2022
·
IF 9.209
Shengdong Sun,Ye Liu,Yueyun Zhang,Lu Wang,Chuanrui Huo,Shiqing Deng,Hui Liu,Yang Ren,Jie Wu,He Qi,Jun Chen
Owing to the mutual restriction between piezoelectric coefficient ( d 33 ) and Curie temperature ( T c ), the discovery of high-temperature piezoceramics with large d 33 is highly desirable but challenging. Here, BiFeO 3 -BaTiO 3 -PbTiO 3 (BF-BT-PT) ternary system is redesigned by combining the low lattice distortion of BF-BT perovskites and rhombohedral-tetragonal coexistence of BF-PT phase boundary. As a result, excellent comprehensive piezoelectric properties with a large d 33 of ∼380 pC/N and a high T c of ∼483 °C are obtained in a tetragonal composition close to the triple point. Interestingly, even though a c / a ratio as large as 1.04 can be detected in the virgin sample, hierarchical domains that macrodomains composed of nanosized stripe domains can be found. The tetragonal phase could partly transform into a monoclinic phase under electric field according to in-situ high-energy synchrotron X-ray diffraction measurement , constructing a field-induced morphotropic phase boundary. The large lattice distortion and unstable phase structure simultaneously contribute to the high T c, and large d 33 for the studied BF-BT-PT ceramics, respectively, showing great potential for high-temperature sensors and transducers.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jilei Wang,Qu Li,Yun Sun,Jingwen Liu,Zhao Jiang,Zhuoping Zheng,Li Liu,Xinhui Min,Yougui Yu,Qing Zheng
Elucidating the mechanisms underlying Baijiu production is a shared aspiration among academic groups specializing in the field of Baijiu research. This study comprehensively examined the mechanisms underlying the yellowish coloration of Baijiu through a synergistic application of chromatographic, spectroscopic, and physical methodologies. Aging of Baijiu in earthenware pots involves the infiltration of mineral ions such as iron, aluminum, and calcium; however, these ions are detected at extremely low concentrations and are therefore not linked to the development of Baijiu's yellowish color. Instead, the yellowish coloration is attributed to the diverse colorants generated during the high-temperature fermentation of small-molecule sugars derived from the saccharification of grain materials. Although these colorants exist in minimal quantities and exhibit spectral absorption peaks ranging from 300 to 450 nm, their overlapping spectra collectively contribute to the light-absorbing properties of Baijiu across a broad wavelength range, ultimately accounting for its characteristic yellowish color.
研究领域:
食品科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）