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| 1 | WEAR FAILURE MECHANISM AND MULTI-IMPACT PROPERTY OF AUTOMOTIVE ENGINE CHAIN显示文摘The multi-impact characteristics and failure mechanism of two kinds of automotive enginechain made in China are studied through engine assembly and road-drive tests. The worn surfacemorphologies of rubbing area between pin, bush and roller are also analyzed based on scanning elec-tron microscope. The results show that the main wear mechanism of automotive engine chain is fa-tigue wear, and its failure mechanism is the forming, extending and flaking of cracks on top layer ofpin and bush. In addition, the material, hot-treatment method and shaping technique for roller have agreat influence upon the resistance to multi-impact. Ensuring sufficient strength and plasticity ofroller, as well as adopting suitable shaping technique are the effective method to increase its resistanceto multi-impact. | Meng Fanzhong Wang Shukun Lan Hong Xu Rongjin Xu Hanxue | 2005 | Chinese Journal of Mechanical Engineering2005，18，3： | 12 |
| 2 | Successive inverse and normal magnetocaloric effects in the Mn-vacancy compound Mn0.95Co0.75Cu0.25Ge显示文摘Ferromagnetic-structural transformation has been studied widely in MnCoGe-based materials. However, the magnetostructural transition(MST) from antiferromagnetic(AFM) orthorhombic phase to ferromagnetic(FM) hexagonal phase, which may lead to a large inverse magnetocaloric effect(MCE), has rarely been reported. Here, the introduction of Mn vacancy lowers the structural transition temperature while retains the AFM state in the orthorhombic phase, thus successfully realizing the AFM-FM MST in Mn0.95Co0.75Cu0.25Ge. Moreover, successive inverse and normal MCEs are observed around the first-order AFM-FM MST and the second-order FM-paramagnetic(PM) transition, respectively. A thermostat is proposed based on this special feature, which could release heat above the critical temperature while absorb heat below the critical temperature by simply applying the same magnetization/demagnetization cycles. This thermostat can be very useful in many applications where a constant temperature is required, such as cryostats and incubators. | FengXia Liu Hu Zhang He Zhou DaoYong Cong RongJin Huang LiChen Wang Yi Long | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，7： | 9 |
| 3 | Vertical‐organic‐nanocrystal‐arrays for crossbar memristors with tuning switching dynamics toward neuromorphic computing显示文摘Memristors proposed by Leon Chua provide a new type of memory device for novel neuromorphic computing applications.However,the approaching of distinct multi‐intermediate states for tunable switching dynamics,the con-trolling of conducting filaments(CFs)toward high device repeatability and reproducibility,and the ability for large‐scale preparation devices,remain full of challenges.Here,we show that vertical‐organic‐nanocrystal‐arrays(VONAs)could make a way toward the challenges.The perfect one‐dimensional structure of the VONAs could confine the CFs accurately with fine‐tune resistance states in a broad range of 103 ratios.The availability of large‐area VONAs makes the fabrication of large‐area crossbar memristor arrays facilely,and the analog switching characteristic of the memristors is to effectively imitate different kinds of synaptic plasticity,indicating their great potential in future applications. | Fangxu Yang Lingjie Sun Qingxi Duan Huanli Dong Zhaokun Jing Yuchao Yang Rongjin Li Xiaotao Zhang Wenping Hu Leon Chua | 2021 | SmartMat2021，2，1： | 5 |
| 4 | Development and Utilization of Saline Lake Resources and Protection of Ecological Environment in Qaidam Basin in Qinghai Province显示文摘Qaidam basin is an important part of National Key Development Area–Lanzhou-Xining Area,is a key region of resource development in Western Development,is a National Circular Economy Pilot Zone.The focus | MENG Wei SHU Jianmin YANG Rongjin LI Yanwu | 2014 | Acta Geologica Sinica(English Edition)2014，88，S1： | 3 |
| 5 | A new generation of plastic optical fibers and its functional exploiting显示文摘A major problem of plastic optical fibers(POFs) is large transmission loss in comparison with silica fibers.After adopting a new optical fiber structure,hollow-core Bragg fiber with cobweb-structured cladding,which can suppress the absorption losses of constituent materials by a factor of about 104―106,the problem of POFs with large losses is solved ultimately.With the advantage of flexibility and easy bending,the POFs with this structure can guide light with low transmission loss for information and energy in the wavelength range of visible light to terahertz(THz) wave(0.4―1000μm).This new generation of POFs will find many | YU RongJin & ZHANG Bing College of Information Science and Engineering,Yanshan University,Qinhuangdao 066004,China | 2008 | Science China(Technological Sciences)2008，51，12： | 3 |
| 6 | Host Preference by Monochamus alternatus (Hope) during Maturation Feeding on Pine Species and Masson Pine Provenances显示文摘Host preferences pine of the sawyer beetle, Monochamus alternates (Hope), during maturation feeding on 8 conifer trees and 40 masson pine provenances, were investigated using 3 types of laboratory bioassay of consistent feeding preference, feeding area and visitation frequency. M. alternatus adults have the highest frequency of feeding and prefer to feed on the branches of P. massoniana and P. densiflora and had significant host selectivity on 8 conifer trees in the area of Nanjing. The adult feeding vi... | LI Rongjin XU Fuyuan ZHANG Pei WANG Laifa ZHAO ZhendongForestry Academy ofJiangsu Province. Nanjing 211153. P. R. China Business: 86-25-2745800. Facs: 86-25-2741620Chinese Academy of Forestry. Beijing 100091. P. R. China Research Institute of Chemical Processing and Utilization of Forest Products,CAFNanjine 210042. P.R. China | 2003 | Chinese Forestry Science and Technology2003，2，4： | 2 |
| 7 | Nanosilver resonance scattering spectral method for determination of hydroxyl radical and its application显示文摘Silver nanoparticles were prepared under a microwave high-pressure condition using citric acid sodium as a reducer while the excess citrate was removed under high speed centrifugation. There is a resonance scattering (RS) peak at 470 nm for silver nanoparticles. In a pH 4.0 HAc-NaAc buffer solution, hydroxyl radicals from the Fenton reaction can oxidize silver nanoparticles to Ag+, resulting in the RS intensity decreasing. The decreased RS intensity at 470 nm (△I 470 nm) is linear with respect to the concentration of H2O2 (C) in the range of 0.27-7.56 μmol/L with a detection limit of 0.23 μmol/L. Its regression equation is △I 470 nm = 24.3 C + 13.8 with a correlation coefficient of 0.9959. This method was applied to screening the antioxidants with satisfactory results. | LIANG AiHui ZHANG NanNan JIANG ZhiLiang LIU RongJin | 2008 | Science China Chemistry2008，51，3： | 2 |
| 8 | Adjustable thermal expansion in La(Fe,Si)13-based conductive composites by high-pressure synthesis显示文摘Providing a suitable contact interface, where a high conductivity material with a desirable coefficient of thermal expansion(CTE) adjoins the target micro-electric devices, is very crucial to optimize the properties and service life of the relevant instruments. Regrettably, a high conductivity, low thermal expansion and relatively inexpensive material is very rare. Composites, fortunately, can offer a method to design materials with adjustable properties by mixing two or more diverse constituents. In this paper, high conductivity composites with adjustable thermal expansion were successfully prepared by a high-pressure synthesis. The composites are based on combining La(Fe,Si)13-based compounds, the materials showing a giant, isotropic negative thermal expansion(NTE) properties, within Cu matrix. The La(Fe,Si)13-based compounds were used to adjust the CTE of the composites, while the Cu phase is in charge of tuning the thermal conductivity properties. Thus, by changing the relative amount of the two components, the composites with high conductivities and adjustable CTE were achieved. Furthermore, the thermal expansion and magnetic properties of the composites were investigated by a physical property measurement system. The present results highlight the potential applications of the Cu-based high conductivity composites with room-temperature NTE properties in the thermal contacts to various semiconductor and microelectronic devices. | Wei Wang Rongjin Huang Yi Shan Yuqiang Zhao Xinran Shan Shibin Guo Chuanjun Huang Laifeng Li | 2019 | Progress in Natural Science:Materials International2019，29，1： | 2 |
| 9 | Utilization of Bayer Red Mud Derived from Bauxite for Belite-Ferroaluminate Cement Production显示文摘Bayer red mud(BRM)is a kind of industrial solid waste characterized by huge volume and high alkalinity.Its disposal generates serious environmental pollution and occupies a large number of farmland.The utilization and recycling of BRM is currently a crucial issue and needs to be addressed as soon as possible.The chemical composition of BRM is similar to cement clinker.In this study,the feasibility of preparing Belite-ferroaluminate clinker(BFAC)with different BRM was explored.The physical properties,mechanics performance,radioactivity levels and trace harmful metals leaching were measured.XRD,BEI and EDS were used to characterize the mineral formation,and SEM is used to reveal the solidified mechanism of trace harmful metal.The results show that the preparation of BFAC using a certain amount of BRM was feasible.The formed phases in clinkers mainly included C_(4)A_(3)Š,C_(2)S and C_(4)AF.The flexural strength and compressive strength of BFAC at 3 days increased whereas 28 and 90 days decreased with the increase of BRM due to the formation of higher C_(4)AF and lower C_(2)S.The formation of large amounts of Al_(2)O_(3)·3H_(2)O gel and Fe_(2)O_(3)·3H_(2)O gel in hydration products enhanced the adsorption capability to heavy metals and other ions.The trace harmful metal concentration in the leaching solution was much less than the upper limits.The radioactivity level of leaching solution was close to natural radioactive background.BRM is safe as raw material of BFAC. | Yanrong Zhao Ping Chen Shifeng Wang Yaxiong Ji Yuanhao Wang Bolin Wu Rongjin Liu | 2020 | Journal of Renewable Materials2020，8，11： | 2 |
| 10 | Broad negative thermal expansion operation-temperature window in antiperovskite manganese nitride with small crystallites显示文摘Using spark plasma sintering (SPS), Mn3Cu0.6Ge0.4N crystallites have been fabricated with different crystallite sizes, and their magnetic properties and thermal behaviors were systemically investigated. With decreasing crystallite size, the magnetic transition becomes increasingly slow, accompanied by broadening of the negative thermal expansion (NTE) operation-temperature window. The NTE operation-temperature window for the 12-nm crystallite sample reaches at 140 K, which is about 75% larger than that of the 74-nm crystallite sample. The magnetic properties and NTE operation-temperature window can be tuned by varying the crystallite size. This discovery will promote an even wider range of practical applications in precision devices. | Jie Tan Rongjin Huang Wei Wang Wen Li YuqiangZhao Shaopeng Li Yemao Han Chuanjun Huang Laifeng Li | 2015 | Nano Research2015，8，7： | 2 |
| 11 | Enhanced NegativeThermal Expansion in La, _x Prx Fe)0 7 Co0 8 Sij 5 Compounds byDoping the Magnetic Rare-Earth Element Praseodymium 显示文摘 | Li Wen Huang Rongjin Wang Wei | 2014 | In-organic chemistry2014，，53： | 1 |
| 12 | Chinese elementary mathematics teachers’ knowledge in mathematics and pedagogy for teaching: the case of fraction division显示文摘 | Yeping Li Rongjin Huang | 2008 | ZDM2008，，5： | 1 |
| 13 | Broadened NegativeThermal Expansion Operation-Temperature Window in Antiperovs-kite Mn3Zn0 6Ge0 4N Prepared by Spark Plasma Sintering 显示文摘 | Tan Jie Huang Rongjin Li Wen | 2014 | Journal of Alloys and Compounds2014，，593： | 1 |
| 14 | Carbo-nate reservoir model of Tahe oilfield显示文摘 | Wang Genjiu Yu Gaoyi Yang Rongjin | 2001 | Petroleum Science2001，4，3： | 1 |
| 15 | Transparent Conductive Electrodes from Graphene/PEDOT:PSS Hybrid Inks for Ultrathin Organic Photodetectors显示文摘 | Zhaoyang Liu Khaled Parvez Rongjin Li Renhao Dong Xinliang Feng Klaus Müllen | 2015 | Adv. Mater2015，，： | 1 |
| 16 | Low-Tempera-ture Negative Thermal Expansion of the Antiperovskite ManganeseNitride Mn3 CuN Codoped with Ge and Si 显示文摘 | Huang Rongjin Li Laifeng Cai Fangshuo | 2008 | Appl Phys Lett2008，93，08： | 1 |
| 17 | How Pythagoras' Theorem Is Taught in Czech Republic,Hong Kong and Shanghai:A case study显示文摘 | Rongjin Huang Frederick K S Leung | 2002 | ZDM2002，34，6： | 1 |
| 18 | Dielectric AlN/epoxy and SiC/epoxy composites with enhanced thermal and dynamic mechanical properties at low temperatures显示文摘In a superconducting magnet,the thermal properties of the insulating material at low temperatures is an important technical index to ensure the normal operation of a superconducting coil.Herein,a low-temperature thermal conductivity testing device with a tiny uncertainty was developed to measure the composites.Furthermore,SiC/epoxy and AlN/epoxy composites were prepared and their properties were tested at low temperatures.The results showed that the composites have a better thermal conductivity at low temperatures than pure epoxy.In addition,the AlN/epoxy and SiC/epoxy composites have excellent dynamic mechanical properties and low coefficient of thermal expansion.Due to the fair thermal and dynamic mechanical properties,the composites will have potential application in the superconducting magnet. | Zhengrong Zhou Rongjin Huang Huiming Liu Yalin Zhao Zhicong Miao Zhixiong Wu Wanyin Zhao Chuanjun Huang Laifeng Li | 2022 | Progress in Natural Science:Materials International2022，32，3： | 1 |
| 19 | Organic single crystals or crystalline micro/nanostructures: Preparation and field-effect transistor applications显示文摘Organic single crystals hold great promise for the development of organic semiconductor materials,because they could reveal the intrinsic electronic properties of these materials,providing high-performance electronic devices and probing the structureproperty relationships.This article reviews the preparation methods for organic single crystals or crystalline micro/nanostructures,including vapor phase growth methods and solution-processed methods,and summarizes a few methods employed in the fabrication of field-effect transistors along with dozens of examples concerning both small molecules and polymers with high field-effect performance. | FU XiaoLong,WANG ChengLiang,LI RongJin,DONG HuanLi & HU WenPing Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China | 2010 | Science China Chemistry2010，53，6： | 1 |
| 20 | Square--structured photonic bandgap fibers显示文摘 | Ming- Yang Chen Rongjin Yu | 2004 | Optics Communications2004，235，： | 1 |
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