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Analysis of heat transfer processes for sapphire growth by horizontal directed crystallization method

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Journal of Advanced Dielectrics 2020年第1期10卷 2-8页

作者： Yu.V.Klunnikova S.P.Malyukov A.V.Filimonov n.zhang Institute of nanotechnology Electronics and Electronic Equipment Engineering Southern Federal University Shevchenko 2Taganrog 347928Russia Department of Physical Electronics Peter the Great St.Petersburg Polytechnic University St.Petersburg 195251 Politekhnicheskaya 29Russia Electronic Materials Research Laboratory Xi’an Jiaotong University 710049

This research summarizes the analytical and experimental results of heat-transfer processes influence on defects formation during sapphire crystal growth by horizontal directed crystallization method(HDC).The shape of solid-melt interface significantly influences the process of sapphire crystals growth by this *** receive the Stefan problem solution for sapphire crystals *** allows investigating the crystal growth process and the related factors(thermal stresses on different stages of growth process),their influence on defects *** investigate the main reasons for the formation of defective structures of the solid phase of sapphire crystals and the influence of thermal unit construction,the crystal geometry on the quality of the resulting sapphire *** study the structure formation process,impurity distribution,and the nature of the defects in the crystal during it growth.

关键词： Crystal growth directional crystallization defects internal stresses analytical methods

Synthesis of functionalize graphene oxide/ZnO composites and electrochemical properties

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Synthesis of functionalize graphene oxide/ZnO composites and...

TEIM2015第六届无机材料结构、性能及测试表征技术研讨会

作者： F.F.Ding n.zhang C.zhang 上海应用技术学院材料学院

ZnO quantum dots(QDs)are anchored on graphene oxide(GO)by a wet chemical self-assembling ***,GO are functionalized with thiol(f-GO)and the ZnO alcogel are prepared by a sol-gel ***,the f-GO/ZnO composite is obtained by a self-assembling ***,X-ray diffraction(XRD),scanning electron microscopy(SEM)and EDS spectrum are employed to characterize the structure,morphology and composition of the obtained samples,moreover,the electrochemical performance of the as-prepared electrode is also detected by cyclic voltammetry and galvanostatic charge-discharge *** is found that the f-GO/ZnO-1 possesses the higher specific values of 149.4F/g and good long-term cycle *** results show that the f-GO/ZnO nanocomposite could be used as electrode material for high performance supercapacitors.

关键词： ZnO Synthesis of functionalize graphene oxide/ZnO composites and electrochemical properties

Rationally designing S/Ti3C2Tx as cathode material with an interlayer for highrate and long-cycle lithium-sulfur batteries

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Rationally designing S/Ti3C2Tx as cathode material with an i...

中国化学会第三届中国能源材料化学研讨会

作者： Q.Jin n.zhang C.C.Zhu H.Gao X.T.zhang School of Physics and Electronic Engineering Harbin Normal University Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education

Lithium-sulfur batteries suffer from poor cycling stability and inferior rate capability,mainly caused by the low conductivity and lithium polysulfides *** tackle these problems,this work demonstrates that Ti

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Applicability of large-ion lithophile and high field strength element basalt discrimination diagrams

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International Journal of Digital Earth 2018年第7期11卷 752-760页

作者： X.L.Liu Q.zhang W.C.Li F.C.Yang Y.Zhao Z.Li S.T.Jiao J.R.Wang n.zhang S.S.Wang W.F.Chen Z.J.Pan J.Yang X.L.Du Faculty of Land and Resource Engineering Kunming University of Science and TechnologyKunmingPeople’s Republic of China Institute of Geology and Geophysics Chinese Academy of SciencesBeijingPeople’s Republic of China Chengdu Geological Survey Center of China Geological Survey ChengduPeople’s Republic of China School of Earth Science Lanzhou UniversityLanzhouPeople’s Republic of China

Basalt discriminant diagrams have been used to identify the tectonic setting of basaltic magmatism since the 1970s and have played an important role in reconstructing paleotectonic ***,the significant increase in the availability of geochemical data has led to a reassessment of these diagrams,suggesting that some of the tectonic settings indicated by these diagrams are not ***,we use a database of global ocean island basalt(OIB),mid-ocean ridge basalt(MORB),and island arc basalt(IAB)geochemistry to propose a series of new tectonic discriminant diagrams based on the ratios of large-ion lithophile elements(LILEs)to high field strength elements(HFSEs).These new diagrams indicate that the LILE can be used to differentiate OIB,MORB,and IAB samples,meaning that LILE/HFSE ratios can discriminate between these basalts that form in different tectonic *** new diagrams can correctly assign samples to OIB,MORB,and IAB categories more than 85%of the time,with the discrimination between OIB and MORB having an accuracy of slightly less than 85%.

关键词： Basalt LILE HFSE discrimination diagram geochemistry

A new Ion-Imprinted Silica Gel Sorbent for On-line Selective Solid-Phase Extraction of Dysprosium（Ⅲ）by ICP-OES

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A New Ion-Imprinted Silica Gel Sorbent for On-line Selective...

第三十五届国际光谱会议

作者： n.zhang B.Hu ~* C.Z.Huang Department of Chemistry Wuhan University Wuhan 430072 P.R.China

＜正＞Ion-imprinted polymers （ⅡPs） are similar to molecular imprinting polymers （MIPs）,but they can recognize metal ions after imprinting and retain all the virtues of MIPs.A particularly promising application of ⅡPs is the solid-phase extraction preconcentration of analytes present in low concentration or the separation of the analytes from other coexisting ions or complex matrix [1～2].In this paper,dysprosium （Ⅲ） imprinted thenoyltrifluoroacetone （TTA） modified silica gel sorbent was synthesized by surface

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重症COVID-19病人的临床特征和胸部CT影像特征

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国际医学放射学杂志 2021年第1期44卷 117-118页

作者： n.zhang X.Xu L.Y.Zhou G.Chen Y.Li H.M.Yin 刘晓斌

摘要目的比较确诊为新型冠状病毒(COVID-19)重症病人中生存和死亡病例的临床、实验室和胸部CT检查结果。方法回顾分析60例患有COVID-19肺炎的重症病人,包括

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Whole exome sequencing implicates PTCH1 and COL17A1 genes in ossification of the posterior longitudinal ligament of the cervical spine in Chinese patients

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Whole exome sequencing implicates PTCH1 and COL17A1 genes in...

2015年浙江省医学遗传学学术年会暨高通量基因测序产前筛查与诊断技术研讨会

作者： W.Wei H-L.He C-Y.Chen Y.Zhao H-L.Jiang W-T.Liu Z-F.Du X-L.Chen S-Y. Shi X-n.zhang Department of Orthopedics Hangzhou Red Cross Hospital Department of Cell Biology and Medical Genetics National Education Base for Basic Medical SciencesInstitute of Cell BiologyZhejiang University School of Medicine Department of Orthopedic Surgery Changzheng HospitalSecond Military Medical University of PLA

Objectives:Ossification of the posterior longitudinal ligament(OPLL)of the cervical spine is a complex multifactorial *** with OPLL commonly present with symptoms in their 40s or *** genetic basis of OPLL remains poorly *** capture combined with massively parallel DnA sequencing has been proposed as an efficient strategy to search for disease-causing genes of both monogenic and multigenic

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对糖尿病足行血流敏感散相稳态自由进动序列MR非增强血管成像的初步经验

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国际医学放射学杂志 2014年第6期 580-581页

作者： X.Liu Z.Fan n.zhang Q.Yang F.Feng P.Liu 石彦姝 Lauterbur Research Center for Biomedical Imaging Shenzhen Institutes of Advanced Technology of Chinese Academy of SciencesShenzhen Key Laboratory for MRI

摘要目的评估血流敏感散相稳态自由进动序列MR非增强血管成像对糖尿病病人足动脉的影像显示质量和诊断效能。材料与方法本前瞻性研究受伦理委员会批准,并获

关键词：血管成像糖尿病病人健康志愿者稳态自由进动 MR 血流序列

对于慢性心肌梗死非增强心脏MRI诊断的深入学习

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国际医学放射学杂志 2019年第4期 486-486页

作者：陈萍 n.zhang G.Yang Z.Gao C.Xu Y.zhang R.Shi Department of Radiology Beijing Anzhen HospitalCapital Medical University

摘要肾脏损害在冠心病病人中很常见,如果严重的话,延迟钆增强(LGE)成像则不能用于对心肌梗死的评估。目的通过对非增强心脏MR的深入学习,开发一个用于描绘慢

关键词：心肌梗死 MRI 深入学习