Advanced Powder Materials最新文献_第9页

Effect of pH, milling time, and Isobam content on porous silicon nitride ceramics prepared by gel casting pH、研磨时间和异硫胺含量对凝胶铸造多孔氮化硅陶瓷的影响

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100060

Hailing Yang , Zhi Wang , Mengyong Sun , Fei Chen , Jun Ji , Sique Chen , Yingying Chen , Deli Ma , Zhenyu Zhang , Baocai Pan , Yulin Wei , Qinggang Li

{"title":"Effect of pH, milling time, and Isobam content on porous silicon nitride ceramics prepared by gel casting","authors":"Hailing Yang , Zhi Wang , Mengyong Sun , Fei Chen , Jun Ji , Sique Chen , Yingying Chen , Deli Ma , Zhenyu Zhang , Baocai Pan , Yulin Wei , Qinggang Li","doi":"10.1016/j.apmate.2022.100060","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100060","url":null,"abstract":"<div>As a non-toxic copolymer of isobutylene and maleic anhydride, Isobam is successfully used as a dispersant and a gelling agent for fabricating porous Si3N4 ceramics by gel casting. The dispersity and rheological properties of the Si3N4 slurry are influenced by the pH, milling time, and Isobam content which varies from 0.1 wt.% to 0.6 wt.%, and these factors are investigated. The slurry with 40 vol.% solid content and milled for 4 h has a high zeta potential at pH 12 (adjusted by Tetramethyl ammonium hydroxide (TMAH)), which means that the particles are well dispersed. The mechanisms of TMAH are electrostatic repulsion and steric hindrance. The viscosity of the slurry increases with the increase of Isobam content. After pressureless sintering at 1700 °C for 2 h, a uniform unique interlocking microstructure of rod-like β-Si3N4 grains is observed, which may improve the flexural strength of the ceramics by intergranular fracture and particle pullout of β-Si3N4 grains. The density and porosity of the samples fluctuate negligibly with the increase of Isobam content, and the Si3N4 ceramic with 0.1 wt.% Isobam exhibits the highest bending strength of 251.6 MPa among all samples.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and computational investigations on the SO2 poisoning of (La0.8Sr0.2)0.95MnO3 cathode materials (La0.8Sr0.2)0.95MnO3正极材料SO2中毒的实验与计算研究

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100062

Rui Wang , Lucas R. Parent , Srikanth Gopalan , Yu Zhong

引用次数: 0

Cross-scale microstructure design of precursor-derived SiC-AlN nanoceramic composites hybrid with ex-situ ZrB2 非原位ZrB2杂化SiC-AlN纳米陶瓷复合材料的跨尺度微结构设计

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100063

Aidong Xia , Buhao Zhang , Jie Yin , Xiao Chen , Sea-Hoon Lee , Xuejian Liu , Zhengren Huang

{"title":"Cross-scale microstructure design of precursor-derived SiC-AlN nanoceramic composites hybrid with ex-situ ZrB2","authors":"Aidong Xia , Buhao Zhang , Jie Yin , Xiao Chen , Sea-Hoon Lee , Xuejian Liu , Zhengren Huang","doi":"10.1016/j.apmate.2022.100063","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100063","url":null,"abstract":"<div>ZrB2/SiC–AlN nanoceramic composites were densified at 1950 °C by hot pressing using an organic-precursor-derived SiC and commercially available AlN and ZrB2. A cross-scale microstructure was constructed by distributing the ZrB2 secondary phase (∼421 nm) within the SiC–AlN solid solution matrix. The substructure of the SiC–AlN matrix was agglomerated by nanograins with an average size of only 62 nm. ZrB2 connected around the majority of pores within the SiC–AlN matrix and contributed to the formation of numerous weak interfacial bonding, resulting in improved strength and toughness. The highest flexural strength and fracture toughness of 579 ± 52 MPa and 6.7 ± 0.1 MPa m1/2 were obtained from a 10 wt%-ZrB2/SiC–AlN sample, respectively. The high concentration of grain boundaries of the ZrB2/SiC–AlN nanoceramic composites resulted in heat insulation characteristic. The thermal diffusivity and conductivity were 3.6 mm2⋅s−1 and 14.3 W·(m·K)−1 at 1400 °C, respectively, while the electrical resistivity was 3.9×103 Ω·cm for the 10 wt%-ZrB2/SiC–AlN sample.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49734228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Failure mechanism and interfacial diffusion behavior of Ru-doped NiAlHf coatings at 1200 °C 钌掺杂NiAlHf涂层在1200℃下的失效机理和界面扩散行为

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100059

Hongzhi Yang , Xiaoya Li , Jianpeng Zou , Qian Shi , Mingjiang Dai , Changguang Deng , Pengbo Lyu

{"title":"Failure mechanism and interfacial diffusion behavior of Ru-doped NiAlHf coatings at 1200 °C","authors":"Hongzhi Yang , Xiaoya Li , Jianpeng Zou , Qian Shi , Mingjiang Dai , Changguang Deng , Pengbo Lyu","doi":"10.1016/j.apmate.2022.100059","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100059","url":null,"abstract":"<div>Ru-doped NiAlHf coatings were deposited on Ni-based single crystal substrate by arc ion plating technology. The failure mechanism and interfacial diffusion behavior were comparatively investigated with NiAlHf coating using scanning electron microscopy, electron probe micro-analyzer, and transmission electron microscopy. The results indicated that microstructure evolution of oxide scale induced by element diffusion process significantly affected oxidation resistance of NiAlHf/Ru coatings, resulting in formation of cracks and voids, thereby accelerating failure process. The precipitates in interdiffusion zone and secondary reaction zone of the substrate initiated by interfacial element diffusion were P phase and σ phase, respectively. And the discrepancy in content was elucidated from the perspective of thermodynamics and kinetics. Besides, microstructural evolution between NiAlHf/Ru coatings and substrate was also deliberated. The research could not only provide profound understanding of NiAlHf/Ru coatings failure mechanism, but also had significant guidance for suppressing precipitation of topological close-packed phases and facilitating development of single crystal Ni-based superalloys.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two birds with one stone: Engineering polymeric carbon nitride with n-π∗ electronic transition for extending light absorption and reducing charge recombination 一举两得：具有n-π*电子跃迁的工程聚合物氮化碳，用于延长光吸收和减少电荷复合

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100077

Gege Zhao , Bangwang Li , Xiaonan Yang , Xiaomeng Zhang , Zhongfei Li , Daochuan Jiang , Haiwei Du , Chuhong Zhu , Huiquan Li , Can Xue , Yupeng Yuan

{"title":"Two birds with one stone: Engineering polymeric carbon nitride with n-π∗ electronic transition for extending light absorption and reducing charge recombination","authors":"Gege Zhao , Bangwang Li , Xiaonan Yang , Xiaomeng Zhang , Zhongfei Li , Daochuan Jiang , Haiwei Du , Chuhong Zhu , Huiquan Li , Can Xue , Yupeng Yuan","doi":"10.1016/j.apmate.2022.100077","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100077","url":null,"abstract":"<div>The weak visible light harvesting and high charge recombination are two main problems that lead to a low photocatalytic H2 generation of polymeric carbon nitride (p-CN). To date, the approaches that are extensively invoked to address this problem mainly rely on heteroatom-doping and heterostructures, and it remains a grand challenge in regulating dopant-free p-CN for increasing H2 generation. Here, we report utilizing the inherent n-π∗ electronic transition to simultaneously realize extended light absorption and reduced charge recombination on p-CN nanosheets. Such n-π∗ electronic transition yields a new absorption peak of 490 nm, which extends the light absorption edge of p-CN to approximately 590 nm. Meanwhile, as revealed by the photoluminescence (PL) spectra of p-CN at the single-particle level, the n-π∗ electronic transition gives rise to an almost quenched PL signal at room temperature, unravelling a dramatically reduced charge recombination. As a consequence, a remarkably improved photocatalytic performance is realized under visible light irradiation, with a H2 generation rate of 5553 μmol g−1∙h−1, ∼ 12 times higher than that of pristine p-CN (460 μmol∙g−1∙h−1) in the absence of the n-π∗ transition. This work illustrates the highlights of using the inherent n-π∗ electronic transition to improve the photocatalytic performance of dopant-free carbon nitrides.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Additive manufacturing SiC-reinforced maraging steel: Parameter optimisation, microstructure and properties 增材制造sic增强马氏体时效钢:参数优化、显微组织和性能

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100076

Chaolin Tan , Wenyou Ma , Cheng Deng , Danli Zhang , Kesong Zhou

{"title":"Additive manufacturing SiC-reinforced maraging steel: Parameter optimisation, microstructure and properties","authors":"Chaolin Tan , Wenyou Ma , Cheng Deng , Danli Zhang , Kesong Zhou","doi":"10.1016/j.apmate.2022.100076","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100076","url":null,"abstract":"<div>The unique deposition manner of additive manufacturing (AM) allows the near-net-shaping of components with multiple materials configurations and complex geometries, which sheds light on the process of high-performance metal matrix composites (MMCs). This work explores laser powder bed fusion (LPBF) AM of SiC-reinforced maraging steel MMCs to consolidate the merits of both ceramics and metal matrix for improving overall properties. The laser processing parameters were systematically optimised based on the density, roughness and hardness of the deposited samples. The effects of SiC content on the microstructures, mechanical properties, tribological performance, and wear resistance are elucidated. SiC particles are refined with uniform distribution in the metal matrix after laser processing. The highest tensile strength reaches 1611 MPa together with an elongation of about 10.1% with 3 vol% SiC addition. The tribological performance of MMCs is investigated by studying the coefficient of friction (COF), wear rate, and worn morphology. The COF has been slightly reduced with the SiC addition, and the wear rate of MS reduced from 3.25 × 10−5 to 1.72 × 10−5 mm3/Nm with the 12 vol% SiC addition. The underlying wear mechanisms are also investigated. Besides, the corrosion behaviour of MMCs is also investigated; the addition of SiC (≥6 vol%) has improved the corrosion properties of the matrix.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Preparation, properties, and electronic applications of 2D Bi2O2Se 二维Bi2O2Se的制备、性质及电子应用

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100080

Wenjun Chen , Rongjie Zhang , Yujie Sun , Jingwei Wang , Yun Fan , Bilu Liu

{"title":"Preparation, properties, and electronic applications of 2D Bi2O2Se","authors":"Wenjun Chen , Rongjie Zhang , Yujie Sun , Jingwei Wang , Yun Fan , Bilu Liu","doi":"10.1016/j.apmate.2022.100080","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100080","url":null,"abstract":"<div>Two-dimensional (2D) materials offer novel platforms to meet the increasing demands of next-generation miniaturized electronics. Among them, the recently emerged 2D Bi2O2Se with unique non-van der Waals interlayer interaction, high mobility, sizeable bandgap, and capability to fabricate homologous heterojunction, is of particular interest. In this Review, we introduce recent progress in preparation, transfer, mechanical and electrical properties, and electronic applications of 2D Bi2O2Se. First, we summarize methodologies to synthesize and massively produce 2D Bi2O2Se, as well as recent advances in transferring them from growth substrate to arbitrary substrates. Then, we review current understandings on the intrinsic mechanical properties of Bi2O2Se at 2D thickness limit, and its in-plane and out-of-plane electrical properties. Electronic devices including field-effect transistors, memristors, and sensors based on 2D Bi2O2Se for neuromorphic computing, memory, logic, and integrated circuits are discussed. Finally, challenges and prospects for the development of 2D Bi2O2Se are proposed.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49711918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Water vapor corrosion behavior and failure mechanism of air sprayed bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/ (SiCw-Mullite)/SiC environmental barrier coating 空气喷涂双层Yb2Si2O7/SiC和三层Yb2Si2O7/ (sicw -莫来石)/SiC环境屏障涂层的水蒸气腐蚀行为及失效机理

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100064

Pengju Chen , Peng Xiao , Zhuan Li , Yichen Wang , Xian Tang , Yang Li

{"title":"Water vapor corrosion behavior and failure mechanism of air sprayed bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/ (SiCw-Mullite)/SiC environmental barrier coating","authors":"Pengju Chen , Peng Xiao , Zhuan Li , Yichen Wang , Xian Tang , Yang Li","doi":"10.1016/j.apmate.2022.100064","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100064","url":null,"abstract":"<div>To improve the corrosion resistance of Cf/SiC composites in a water vapor oxygen coupled environment, the bi-layer Yb2Si2O7/SiC and tri-layer Yb2Si2O7/(SiCw-Mullite, SM)/SiC environment barrier coatings were designed and prepared on the surface of Cf/SiC composites by chemical vapor deposition and sol-gel method united with air spraying. Results show that the mass loss of bi-layer Yb2Si2O7/SiC coating coated samples was 17.24 × 10−3 g cm−2 after 200 h oxidation at 1673 K, and the average compression strength retention rate was only 79.44% due to the formation of wide penetrating cracks. Comparatively, SiC whiskers in SM middle coating can not only increase the crack propagation resistance of mullite middle coating, but also alleviate the difference of coefficient of thermal expansion between Yb2Si2O7 outer coating and mullite middle coating. Therefore, the mass loss of tri-layer Yb2Si2O7/SM/SiC coating coated samples was only 2.93 × 10−3 g cm−2 after 200 h oxidation at 1673 K, and the average compression strength retention rate was up to 98.79%.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain regulation via composition and valence dependent substitution in BNT-based solid solutions 基于bnt的固溶体中成分和价相关取代的应变调节

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100079

Xiaojun Wu, Chao Wu, Diyan Yang, Jie Yin, Jiagang Wu

{"title":"Strain regulation via composition and valence dependent substitution in BNT-based solid solutions","authors":"Xiaojun Wu, Chao Wu, Diyan Yang, Jie Yin, Jiagang Wu","doi":"10.1016/j.apmate.2022.100079","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100079","url":null,"abstract":"<div>Simultaneous composition and valence-dependent strain regulation is achieved in lead-free (Bi0.5Na0.4K0.1)1-2xSm2xTi1-xMnxO3 (BNKT-SM100x) ceramics by a facile co-doping design with Sm3+ and Mn2+. By simply controlling the sintering temperature, Mn ions exhibited mixed-oxidation states with different ion radius and electronic structures, further adjusting the crystalline field. The regulated disorder degree finally induced large electro-strain (0.445%) under appropriate doping contents (x = 0.01) and sintering temperature (1150 °C). Moreover, the random effect of Mn2+ (arising from the different valence and radius comparing with Ti4+) is stronger than the pinning effect due to the suppressed oxygen vacancies, and the different crystal structures may also affect the role of Mn2+. The domain morphologies with mixed nanodomain and ferroelectric domain were observed in the BNKT-SM1 ceramics, further demonstrating the coexistence of random effect and pinning effect. It is believed that the self-strain regulation phenomenon in this work may serve as an effective strategy for designing ferroelectrics with high strain performance.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49712260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Constructing Cd0.5Zn0.5S/Bi2WO6 S-scheme heterojunction for boosted photocatalytic antibiotic oxidation and Cr(VI) reduction 构建Cd0.5Zn0.5S/Bi2WO6 S-scheme异质结促进光催化抗生素氧化和Cr(VI)还原

Advanced Powder Materials Pub Date : 2023-01-01 DOI: 10.1016/j.apmate.2022.100073

Shijie Li , Mingjie Cai , Yanping Liu , Chunchun Wang , Ruyu Yan , Xiaobo Chen

{"title":"Constructing Cd0.5Zn0.5S/Bi2WO6 S-scheme heterojunction for boosted photocatalytic antibiotic oxidation and Cr(VI) reduction","authors":"Shijie Li , Mingjie Cai , Yanping Liu , Chunchun Wang , Ruyu Yan , Xiaobo Chen","doi":"10.1016/j.apmate.2022.100073","DOIUrl":"https://doi.org/10.1016/j.apmate.2022.100073","url":null,"abstract":"<div>The development of distinguished photocatalysts with high photo-carrier disassociation and photo-redox power for efficient elimination of pollutants in water is of great significance but still a grand challenge. Herein, a novel Cd0.5Zn0.5S/Bi2WO6 S-scheme heterojunction was built up by integrating Cd0.5Zn0.5S nanoparticles on Bi2WO6 microspheres via a simple route. The S-scheme charge transfer mode substantially boosts the high-energetic electrons/holes spatial detachment and conservation on the Cd0.5Zn0.5S (reduction) and Bi2WO6 (oxidation), respectively, as well as effectively suppresses the photo-corrosion of Cd0.5Zn0.5S, rendering Cd0.5Zn0.5S/Bi2WO6 photocatalysts with superior redox ability. The optimal Cd0.5Zn0.5S/Bi2WO6 heterojunction achieves exceptional visible-light-driven photocatalytic tetracycline degradation and Cr(VI) reduction efficiency, 3.2 (1.9)-time and 33.6 (1.6)-time stronger than that of neat Bi2WO6 (Cd0.5Zn0.5S), while retaining the superior stability and reusability. Quenching test, mass spectrometry analysis, and toxicity assessment based on Quantitative Structure Activity Relationships. calculation unravel the prime active substances, intermediates, photo-degradation pathway, and intermediate eco-toxicity in photocatalytic process. This research not only offers a potential photocatalyst for aquatic environment protection but also promotes the exploration of novel and powerful chalcogenides-based S-scheme photocatalysts for environment protection.</div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49734187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 210