|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | ZnO varistors with high voltage gradient and low leakage current by doping rare-earth oxide显示文摘The surge arrester of 1000 kV gas-insulated substation (GIS) needs ZnO varistor with high voltage gradient to effectively improve the potential distribution along ZnO varistor column inside the metal-oxide surge arresters. In this paper, the elec-trical and structural parameters of ZnO varistors are changed by doping with some rare-earth oxides, and the mechanism which leads these changes is discussed. When rare-earth oxide additives are added into ZnO varistors, the growing speed is slowed down due to the stabilization of the new spinel phases formed in the grain-boundary by rare-earth oxide additives, then the size of ZnO grains is smaller, and the voltage gradient of varistor increases obviously. By adding suitable amount of oxides of metal Co and Mn, the leakage current can be effectively decreased and the nonlinearity coefficient increased. The novel ZnO varistor samples sintered with the optimal additives have a voltage gradient of 492 V/mm, and the nonlinearity coefficient of 76, but their leakage currents are only 1 μA. | HE JinLiang HU Jun LIN YuanHua | 2008 | Science China(Technological Sciences)2008，51，6： | 21 |
| 2 | Calculation analysis of sustained casing pressure in gas wells显示文摘Sustained casing pressure (SCP) in gas wells brings a serious threat to worker safety and environmental protection. According to geological conditions, wellbore structure and cement data of gas wells in the Sichuan-Chongqing region, China, the position, time, environmental condition and the value of SCP have been analyzed. On this basis, the shape of the pressure bleed-down plot and pressure buildup plot were diagnosed and the mechanism of SCP has been clarified. Based on generalized annular Darcy percolation theory and gas-liquid two-phase fluid dynamics theory, a coupled mathematical model of gas migration in a cemented annulus with a mud column above the cement has been developed. The volume of gas migrated in the annulus and the value of SCP changing with time in a gas well in Sichuan have been calculated by this model. Calculation results coincided well with the actual field data, which provide some reference for the following security evaluation and solution measures of SCP. | Zhu Hongjun Lin Yuanhua Zeng Dezhi Zhang Deping Wang Feng | 2012 | Petroleum Science2012，9，1： | 12 |
| 3 | One-step hydrothermal synthesis of hierarchical Ag/Bi_2WO_6 composites: In situ growth monitoring and photocatalytic activity studies显示文摘Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag from Ag+ precursors. In situ energy dispersive X-ray diffraction (EDXRD) monitoring showed that the hydrothermal formation kinetics of Bi2WO6 in the presence of EG was significantly slowed down due to its very high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Bi2WO6 is strongly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooperative effects of plasmon absorption band and separation of photogenerated electron-hole pairs. | ZHOU Ying ZHANG Qian LIN YuanHua ANTONOVA Elena BENSCH Wolfgang PATZKE Greta R. | 2013 | Science China Chemistry2013，56，4： | 11 |
| 4 | Improvement of water resistance of long afterglow SrAl_2O_4: Dy, Eu phosphor by coating with SiO_2 film显示文摘The long afterglow SrAl2O4:Dy,Eu phosphor is liable to hydrolyze in water with deterioration of the luminescent property. SrAl2O4:Dy,Eu phosphors were therefore heated at 60-90℃ in TEOS sol to form a surface gel and then heat-treated at 400℃ to obtain SiO2 coated phosphors. Observation by Transmission Electron Microscope (TEM) and X-ray photoelectron spectroscopy (XPS) shows that a thin silica film forms on the surface of the phosphors. The coating procedure can be illustrated by a four-step process and the transparent silica film can suppress the hydrolysis process, so that the luminescent properties of the phosphors are unimpaired or even better. | ZHANG Junying, CHEN Qingming, LIN Yuanhua, and ZHANG ZhongtaiState Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University,Beijing 100084, China | 2002 | Rare Metals2002，21，2： | 7 |
| 5 | Polymer nanocomposite dielectrics for electrical energy storage显示文摘Dielectric materials store and release electrical energy electrostatically through dielectric polarization and depolarization by the application and removal of an electric ield(as shown in Fig.1).As the only energy-storage device that is capable of delivering power density on the order of mega or even giga wats,electrostatic ca- | Yang Shen Xin Zhang Ming Li Yuanhua Lin Ce-Wen Nan | 2017 | National Science Review2017，4，1： | 6 |
| 6 | High-conductivity free-standing Li_(6)PS_(5)Cl/poly(vinylidene difluoride)composite solid electrolyte membranes for lithium-ion batteries显示文摘Bulk-type all-solid-state batteries(ASSBs)using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety.However,cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode.For achieving high-performance ASSBs,creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential.In this work,we present Li_(6)PS_(5)Cl/poly(vinylidene difluoride)(LPSCl/PVDF)composite electrolytes prepared by a slurry method.The influence of the PVDF content on the microstructure,morphology,ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated.Free-standing LPSCl/PVDF membranes with a thickness of 100-120 mm and a high ionic conductivity of about 1·10^(-3) S cm^(-1) at 25℃ are obtained.After adding PVDF to the LPSCl electrolyte,the cycling stability of the LPSCl electrolyte against lithium metal improves significantly.Therefore,LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs. | Shuo Wang Xue Zhang Sijie Liu Chengzhou Xin Chuanjiao Xue Felix Richter Liangliang Li Lizhen Fan Yuanhua Lin Yang Shen Jurgen Janek Ce-Wen Nan | 2020 | Journal of Materiomics2020，6，1： | 5 |
| 7 | Microstructures and characteristics of deep trap levels in ZnO varistors doped with Y_2O_3显示文摘In this paper discussions on ZnO based varistor ceramics doped with different ratios of Y2O3 are presented.Analysis on the phase and microstructures of the samples indicates that an additional phase is detected in the samples doped with Y2O3,and the average grain size of the specimens decreases from about 9.2μm to 4.5μm,with an increase in the addition of Y2O3 from 0 mol%to 3 mol%.The corresponding varistor’s voltage gradient markedly increases from 462 V/mm to 2340 V/mm,while the nonlinear coefficient decreases from 22.3 to 11.5,respectively.Furthermore,the characteristics of deep trap levels in these ZnO samples are investigated by measuring their dielectric spectroscopies.The trap energy level and capture cross section evaluated by relaxation peak of the Cole-Cole plot vary slightly as the addition of Y2O3 increases.These traps may be ascribed to the intrinsic defects of ZnO lattice. | LIU Jun 1 ,HU Jun 1 ,HE JinLiang 1 ,LIN YuanHua 2 &LONG WangCheng 1 1State Key Laboratory of Power Systems,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China 2State Key Laboratory of New Ceramics and Fine Processing,Department of Material Science and Engineering,Tsinghua University, Beijing 100084,China | 2009 | Science China(Technological Sciences)2009，52，12： | 5 |
| 8 | High-temperature Electric Properties of Polycrystalline La-doped CaMnO_3 Ceramics显示文摘Polycrystalline La-doped CaMnO3 ceramics have been prepared by a solid-state sintering method.Analysis of microstructure and phase composition indicates that the addition of La can prohibit the further growth of grain,and no impurity phase appears.The results revealed that the La doping can lead to a large change of the activation energy(from 0.22 to 0.02 eV),and thus result in a marked increase in electric conductivity of 2-4 orders of magnitude.The power factor can reach about 1.5×10-4 W·m-1·K-2 in a wide temperature range,which potentially make them attractive for n-type high-temperature thermoelectric materials. | Jinle Lan Yuanhua Lin Ao Mei Cewen Nan Yong Liu Boping Zhang Jingfeng Li | 2009 | Journal of Materials Science & Technology2009，25，4： | 3 |
| 9 | Dielectric and Ferroelectric Properties of BaTiO_3 Nanofibers Prepared via Electrospinning显示文摘BaTiO3 nanofibers of about 400 nm in diameter were synthesized via electrospinning.The evolution of the morphology and phase composition of the BaTiO3 nanofibers was studied by scanning electron microscopy and X-ray diffraction within the annealing temperature of 750-1050 ℃.Higher annealing temperature led to rougher surface and better crystallization of the BaTiO3 nanofibers.Below 1050 ℃,the BaTiO3 nanofibers maintained its large aspect ratios and could still be regarded as individual nanofiber.The dielectric permittivities of the BaTiO3 nanofibers(εr 820) were calculated with the MG equation by considering the porous bulk specimens as composites of BaTiO3 nanofibers and air.The ferroelectric properties of the BaTiO3nanofibers were measured by using a ferroelectric analyzer coupled with an atomic force microscope.P-E loop measured for the BaTiO3 nanofiber exhibits small hysteresis. | Yan Wei Yu Song Xuliang Deng Bing Han Xuehui Zhang Yang Shen Yuanhua Lin | 2014 | Journal of Materials Science & Technology2014，30，8： | 3 |
| 10 | Influence of time on the microstructure of AISI 321 austenitic stainless steel in salt bath nitriding显示文摘 | Jun Wang Yuanhua Lin Jing Yan Dezhi Zen Qiang Zhang Runbo Huang Hongyuan Fan | 2012 | Surface & Coatings Technology2012，，15： | 2 |
| 11 | Characterization and Proteomic Analysis of Novel Rice Lesion Mimic Mutant with Enhanced Disease Resistance显示文摘Lesion mmic mutants(LMMs)are plants that spontaneously form lesions without pathogeninfection or external stimulus and exhibit resistance to pathogens.Here,a rice LMM was created by ethylmethane sulfonate mutagenesis,named as hpil(hydrogen peroxide induced lesion).Diaminobenzidineand trypan blue staining showed that large amounts of H_(2)O_(2) were produced and cell death was occurredat and around the parts of lesion mimic in the rice leaves.The phenotype of hpil is controlled by a singlerecessive gene,localized at a 2 Mb interval on chromosome 2.The data suggested that hpil is a novelLMM with enhanced bacterial and fungal disease resistance,and multiple pathogenesis-related proteins(PRs)were up-regulated.The proteomes of leaves at three positions(different degrees of lesion mimicseverity)were characterized in hpil compared with its wild type plant.Differentially expressed proteinswere detected by two dimensional difference gel electrophoresis and 274 proteins were identified byMALDITOF/TOFTM.These proteins were related to metabolic process,cellular process and response tostimulus,with mostly down-regulated in hpil leaves.Many of these proteins were related to the Calvincycle,photosynthetic electron transport chain,glycolysis/gluconeogenesis and phosphonates pathways.Some resistance-related proteins including 14-3-3 proteins,OsPR10 and antioxidases such asperoxidase,superoxide dismutase and ascorbate peroxidase were up-regulated in leaves with lesionmimic.These results provide the foundation for cloning of the target gene and shed light on themechanism involved in autaimmunity of rice. | Yang Yong Lin Qiujun Chen Xinyu Liang Weifang Fu Yuwen Xu Zhengjin Wu Yuanhua Wang Xuming Zhou Jie Yu Chulang Yan Chengqi Mei Qiong Chen Jianping | 2021 | Rice science2021，28，5： | 2 |
| 12 | Thermoelectric Properties of Ca_3Co_4O_9/Polyaniline Composites显示文摘Ca_3Co_4O_9/polyaniline bulk composites have been successfully fabricated by ball-milling and hot-pressing method.Our results indicate that the Seebeck coefficient can be increased nearly by 400%with adding15 wt%Ca_3Co_4O_9 to the polyaniline.The thermal conductivity changes slightly with increasing filler content.The highest figure of merit,ZT can reach 5 × 10^(-4) at 329 K for these bulk composites,which is almost 50times larger than that of pure polyaniline,suggesting that the polymer-thermoelectric oxide composites are promising candidates for light-weight,low-cost and non-toxic thermoelectric applications. | Bin Zheng Yuanhua Lin Jinle Lan Xiaoping Yang | 2014 | Journal of Materials Science & Technology2014，30，4： | 2 |
| 13 | Theoretical and experimental study of the thermal strength of anticorrosive lined steel pipes显示文摘Bimetallic lined steel pipe(LSP) is a new anti-corrosion technology. It is widely used to transport oil, gas, water and corrosive liquid chemicals. At present, the hydroforming pressure for LSP has been investigated theoretically and experimentally by most researchers. However, there are a few reports on the thermal strength of bimetallic LSP. Actually, the bimetallic LSP will be subjected to remarkable thermal load in the process of three layer polyethylene(3PE) external coating. Reverse yielding failure may occur on the inner pipe of the bimetallic LSP when it suffers from remarkable thermal load and residual contact pressure simultaneously. The aim of this paper is to study the thermal load and strength of the bimetallic LSP. A mechanical model, which can estimate the thermal strength of the bimetallic LSP, was established based on the elastic theory and the manufacture of the bimetallic LSP. Based on the model, the correlation between the thermal strength of the bimetallic LSP and residual contact pressure and wall thickness of the inner pipe was obtained. Reverse yielding experiments were performed on the LSP(NT80SS-316L) under different thermal loads. Experiment results are consistent with calculated results from the theoretical model. The experimental and simulation results may provide powerful guidance for the bimetallic LSP production and use. | Zeng Dezhi Deng Kuanhai Lin Yuanhua Shi Taihe Shi Daiyan Zhou Lizhi | 2014 | Petroleum Science2014，11，3： | 2 |
| 14 | Effects of doping Eu2O3 on the phase transformation and piezoelectric properties of Bi1/2Na1/2TiO3based ceramics显示文摘 | Yuanhua Lin Shujin Zhao Ning Cai etc | 2003 | Materials Science and Engineering B2003，99，： | 1 |
| 15 | Influence of co-doping different rare earth ions on the luminescence of CaAl2O4-based phosphors 显示文摘 | Yuanhua Lin Zilong Tang Zhongtai Zhang | 2003 | J European Ceramic Society2003，23，： | 1 |
| 16 | Multiferroic properties of Bi 3.15 Nd 0.85 Ti 3 O 12 –CoFe 2 O 4 bilayer films derived by a sol–gel processing显示文摘 | Bin Yang Zheng Li Ya Gao Yuanhua Lin Ce-Wen Nan | 2011 | Journal of Alloys and Compounds2011，，13： | 1 |
| 17 | Magnetic-electric behaviors in BiFeO3 films grown on LaNiO3-buffered Si substrate显示文摘 | Wang Yao Li Zheng Lin Yuanhua | 2009 | J Appl Phys2009，106，07： | 1 |
| 18 | Magnetoelectric resonance behavior of simple bilayered Pb (Zr, Ti) O3-(Tb, Dy) Fez/epoxy composites 显示文摘 | SHI Zhan MA Jing LIN Yuanhua | 2007 | J Appl Phys2007，101，04： | 1 |
| 19 | Preparation of a new long afterglow blue-emitting Sr2MgSi2O7-based photoluminescent phosphor显示文摘 | Yuanhua Lin Zilong Tang Zhongtai Zhang Xiaoxin Wang Junying Zhang | 2001 | Journal of Materials Science Letters2001，，16： | 1 |
| 20 | Preparation of the ultrafine SrAl2O4∶Eu,Dy needle-like phosphor and its optical properties 显示文摘 | Yuanhua Lin Zhongtai Zhang Feng Zhang | 2000 | Materials Chemistry and Physics2000，65，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员