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research on Ultrafine Tungsten Carbide-Cobalt(WC-Co) Cemented Carbide rods of Miniature Drills for Highly Integrated printed Circuit Board(pCB)

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Journal of materials Science & technology 2005年第3期21卷 353-356页

作者： Xiaoliang SHI, Gangqin SHAO, Xinglong DUAN and r.nzhang yuan state key {4. of advanced technology for.mater.als synthesis & p.ocessing, wuhan university of technology, wuhan 4.0070, china Lab. of advanced technology for.mater.als synthesis and {4. Wuhan University of Technology Wuhan 430070 China

Nanocrystalline tungsten carbide-cobalt (WC-Co) composite powders produced through spray thermal decomposition-continuous reduction and carburization technology were used to prepare φ3.25 mm×38 mm ultrafine tungsten carbide-cobalt (WC-Co) cemented carbide rods through vacuum sintering plus sinterhip technology. The microstructure, Vickers hardness, density and rockwell A hardness (HrA), transverse rupture strength (TrS), saturated magnetization and coercivity force were tested. The results show that the average grain size of the sintering body prepared through vacuum sintering plus sinterhip technology was 4.0 nm; transverse rupture strength (TrS) was 3850 Mpa; Vickers hardness was 1890 and rockwell A hardness of sintering body was 93. High strength and high hardness ultrafine WC-Co cemented carbide rods used to manufacture printed circuit board (pCB) drills were obtained.

关键词： Nanocrystalline Composite powder Cemented carbide rods

Nafion/Silicon Oxide Composite Membrane for High Temperature proton Exchange Membrane Fuel Cell

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Journal of wuhan university of technology(materials Science) 2007年第3期22卷 478-481页

作者：余军 state key laboratory of advanced {4. for.mater.als synthesis and p.ocessing Wuhan University of Technology

Nafion/Silicon oxide composite membranes were produced via in situ sol-gel reaction of tetraethylorthosilicate （TEOS） in Nafion membranes. The physicochemical properties of the membranes were studied by FT-Ir,TG-DSC and tensile strength. The results show that the silicon oxide is compatible with the Nation membrane and the thermo stability of Nation/Silicon oxide composite membrane is higher than that of Nation membrane. Furthermore, the tensile strength of Nation/Silicon oxide composite membrane is similar to that of the Nation membrane. The proton conductivity of Nation/Silicon oxide composite membrane is higher than that of Nation membrane. When the Nation/Silicon oxide composite membrane was employed as an electrolyte in H2/O2 pEMFC, a higher current density value （1 000 mA/cm^2 at 0.38 V） than that of the Nafion1135 membrane （100 mA/cm^2 at 0.04.V） was obtained at 110 ℃.

关键词： pEMFC composite membrane silicon oxide high temperature

Fabrication of A1/Al_2O_3 Composites and FGM

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Journal of materials Science & technology 2001年第6期17卷 646-648页

作者： Hong TAO, chengji DENG, Lianmeng ZHANG and r.nzhang yuan state {4. laboratory of advanced technology for.mater.als synthesis and p.ocessing, wuhan university of technology, wuhan 4.0070,{14. [Manuscript received November 27 wuhan Univ. of Technol. Wuhan 430070 China

Al/Al203 composites of different ratios were hot-press sintered at 575~64.℃ under a pressure of 30 Mpa for 2 h in a vacuum furnace. It was found that the relative density of the Al/Al203 composites could be increased evidently with the rise of sinter temperature. No reaction occurred between At and Al203 at the sinter temperatures. Under 64.℃-30 Mpa-2 h experimental condition, Al/Al203 system FGM was successfully fabricated, and its density range changed quasi-continuously from 2.887×103 kg/m3 to 3.1909×103 kg/m3 within the middle 1.0 mm thickness range.

关键词： Fabrication of Al/Al2O3 Composites and FGM Co Al

Novel Magnetorheological Suspensions Based on Co-phthalocyanine/Fe Nanocomposite particles

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Journal of materials Science & technology 2001年第5期17卷 511-516页

作者： rongzhou GONG and Zekun FENG Dept. of Electronic Science and technology, Huazhong university of Science and technology, wuhan 4.0074.{4. Jianguo GUAN and r.nzhang yuan state key laboratory of advanced technology for.mater.als synthesis and {14., wuhan Univ. of Technol. Wuhan 430070 China

A novel magnetorheological (Mr) suspension was based on methyl silicone oil and cobalt-phthalocyanine (Co-pc)/Fe nanocomposite particles, which were synthesized by thermally decomposing liquid carbonyl Fe in the solution of Co-pc in N, N-dimethyl formamide. The nanocomposite particles were fully characterized by XrD, SEM and HrEM, and the thermal, magnetic and Mr properties of nanocomposite particles were measured. Such factors as weight percent of particles (w), magnetic field strength (H), temperature (T) and shear rate (gamma) etc influencing on Mr properties were investigated. The results indicated that Co-pc/Fe nanocomposite with density of 3.66 g/cm(3) was almost micro-sized regular spheroids consisting of tens of Co-pc coated alpha -Fe nanoparticles in inner and Co-pc layers on surface of the spheroids. They showed good characteristics of anti-oxidation and soft magnetic. Increment of w increased field-induced shear stress (Delta tau) and zero-field viscosity (eta (0)) of Mr suspensions monotonously, and improved anti-settlement stability, but eta (0) increased more markedly than Delta tau with increasing w. Delta tau was basically independent on T and gamma while increased obviously with increasing H. With increasing T, response time of the Mr suspension to external magnetic field seemed to decrease. As a result, Mr suspensions with satisfactory stability and rapid, completely reversible and significant Mr effect can be obtained from Co-pc/Fe nanocomposite particles.

关键词： Fe Co Novel Magnetorheological Suspensions Based on Co-phthalocyanine/Fe Nanocomposite particles

Structural properties of Ions and polyelectrolytes in Aqueous Solutions under External Electric Fields:The Sign Effect

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Chinese Journal of polymer Science 2024年第9期42卷 1341-1352,I0007页

作者： cheng-Jiang Lin Jun-Jun Wang yuan Jiang Shu-Li chen Hong-Fei Li wen-Han Zhao {4.-rong Huang Chang-ru rong Xiao-Zheng Duan state key laboratory of polymer physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China National key laboratory of advanced Vehicle Integration and Control China FAW Group Co.Ltd.Changchun130013China state key laboratory of Molecular Engineering of polymers Department of Macromolecular ScienceFudan UniversityShanghai200438China Department of Food Science Rutgers University65 Dudley RoadNew BrunswickNew Jersey08901USA

We utilize molecular dynamics simulations to investigate the microstructures of ions and polyelectrolytes in aqueous solutions under external electric *** focusing on the multi-body interactions between ionic components and H_(2)O molecules,as well as their responses to the external electric fields,we clarify several nontrivial molecular features of the ionic and polyelectrolyte solutions,such as the solvations of cations and anions,clustering of the ions,and dispersions/aggregations of polyelectrolyte chains,as well as the corresponding responses of H_(2)O molecules in these *** simulations illustrate the variations in structures of ionic solutions caused by reversing the charge sign of the ions,and elucidate the disparity in structures between anionic and cationic polyelectrolyte solutions in the presence of the external electric *** work clarifies the mechanism for the alternations in complex multi-body interactions in aqueous solutions caused by the application electric field,which can contribute to the fundamental understanding of the physical and chemical natures of ion-containing and charged polymeric systems.

关键词： polyelectrolyte Ions Aqueous solutions External electric fields Asymmetric dipole

portable fluorogenic probe for monitoring of volatile amine vapour and food spoilage

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Chinese Chemical Letters 2024年第3期35卷 257-261页

作者： Jian-Hao Zhao wen-Xing xu Bin Li Wei xu Wu-Kun Zhang Ming-Shuai yuan Hui-Zi Li {4.-Guo He Xiang Ma Jian-Gong cheng Yan-Yan Fu state key Lab of Transducer technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of materials Science and Optoelectronics Engineering University of the Chinese Academy of SciencesBeijing 100039China School of physical Science and technology ShanghaiTech UniversityShanghai 201210China key laboratory for advanced materi{4. and Feringa Nobel prize Scientist Joint research Center Frontiers Science Center for materiobiology and Dynamic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

There are urgent needs of volatile amine gas sensors with high-performance in food quality control,disease monitoring and environmental ***-film fluorescent probe is suitable for amine vapour sensing due to its high sensitivity,high selectivity,and no polluting ***,a novel fluorescent probe based on indacenodithiophene structure withπconjugated system was designed and *** experimental results show that the films prepared by this material exhibit rapid and distinct fluorescence quenching after being exposed to saturated vapours of primary amine,secondary amine and tertiary amine represented by n-propylamine,diethylamine and trimethylamine,*** quenching of fluorescence is 84.,87%and 96%,respectively,within 10 *** detection mechanism of probe for primary amine is based on specific chemical reaction,while the detection mechanism for secondary amine and tertiary amine is intramolecular charge *** experiments show that the detection limit of the fluorescent probe for trimethylamine,an important marker of food spoilage,could reach 4.610 ***-site detection based on spoilage of small yellow croaker suggests the material possesses the potential for food freshness *** simple fluorogenic probe is an original approach to simplify real-time visual monitoring of volatile amine vapour.

关键词： Fluorescent probe Volatile amine Gas sensing Trimethylamine Food spoilage

INTErpHASE　STrESS　COrrOSION　CrACKING　OF　ALLOY　Ti－24.l－11Nb　IN　METHANOL　SOLUTION

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Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 121-128页

作者： ZHANG Yue CHU Wuyang XIAO Jimei(Department of materials physics,university of Science and technology Beijing,Beijing 100083,{4.) OUYANG Shixi yuan r.nzhang(state key laboratory for synthesis and p.ocessing of advanced materials.wuhan university of Techn Univ of Science and technology Beijing Beijing China

For alloy Ti-24.l-11Nb,stress corrosion cracking(SCC) in methanol solution and hydrogen induced cracking(HIC) during dynamic charging at room temperature have been *** has shown that the normalised threshold stress intensities of SCC failure for various microstructures are KISCC/KC =0.53 0.69 and the threshold value for SCC arresting KISCC/ KIC=*** threshold values of HIC during dynamic charging are close to that of SCC,but da/dt or fracture time of HIC is one to three orders of magnitude smaller or longer than that of SCC,*** surface for HIC is also different from that for *** the Ti-24.l-Nb alloy-methanol systein,a kind of inierphase SCC has been found For the microstructures resulting from furnace cooling,SCC initiated and propagated preferentially along theα2/βinterphase boundaries,displaying the microstructure on the fracture surface of ***,there is no interphase SCC for the microstructure resulting from air cooling.

关键词： Ti-24.l-11Nb,hydrogen induced cracking,interphase stress corrosion cracking methanol

Follicle stimulating hormone controls granulosa cell glutamine synthesis to regulate ovulation

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protein & Cell 2024年第7期15卷 512-529页

作者： Kai-Hui Zhang Fei-Fei Zhang Zhi-Ling Zhang Ke-Fei Fang wen-Xing Sun Na Kong Min Wu Hai-Ou Liu Yan Liu Zhi Li qing-qing Cai Yang Wang Quan-Wei Wei peng-cheng Lin Yan Lin Wei {4. Cong-Jian {4. Yi-yuan yuan Shi-Min Zhao The Obstetrics&Gynecology Hospital of Fudan university State Key Laboratory of Genetic EngineeringFudan UniversityShanghai 200090China Shanghai key laboratory of Metabolic remodeling and Children’s Hospital of Fudan UniversityShanghai 200032China School of Life Sciences and Institutes of Biomedical Sciences Fudan UniversityShanghai 200438China Department of Nutrition and Food Hygiene School of Public HealthNantong UniversityNantong 226019China reproductive Medicine Center The Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China Shanghai Fifth people’s Hospital of Fudan university Fudan UniversityShanghai 200240China Department of Animal Science and technology Nanjing Agricultural UniversityNanjing 210014China key laboratory for Tibet plateau phytochemistry of qinghai province College of PharmacyQinghai University for NationalitiesXining 810007China pediatric research Institute Children’s Hospital Affiliated to Shandong University(Jinan Children’s Hospital)Jinan 250022China

polycystic ovary syndrome(pCOS)is the leading cause of anovulatory *** understanding of the ovulation drivers hinders pCOS ***,we report that follicle stimulating hormone(FSH)controls follicular fluid(FF)glutamine levels to determine *** ovulation starts from FF-exposing granulosa cell(GC)*** glutamine,which decreases in pre-ovulation porcine FF,elevates in pCOS patients ***-glutamine chow to elevate FF glutamine inhibits mouse GC apoptosis and induces hormonal,metabolic,and morphologic pCOS ***,follicle-development-driving FSH promotes GC glutamine synthesis to elevate FF glutamine,which maintain follicle wall integrity by inhibiting GC apoptosis through inactivating ASK1-JNK apoptotic *** and glutamine inhibit the rapture of cultured murine *** removal or ASK1-JNK pathway activation with metformin or AT-101 reversed pCOS traits in pCOS models that are induced with either glutamine or *** suggest that glutamine,FSH,and ASK1-JNK pathway are targetable to alleviate pCOS.

关键词： ovulation glutamine granulosa cells pCOS FSH

Modulating low-frequency tribocatalytic performance through defects in uni-doped and bi-doped SrTiO_(3)

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Journal of advanced Ceramics 2024年第8期13卷 1153-1163页

作者： Yjing xu Yingzhi Meng xu Xiang qing Tang Hongfang Zhang Lajun Liu Ju Gao Bo xu renhong Liang Longlong Shu Yanmin Jia Wanping {4. School of physical Science and technology Suzhou University of Science and TechnologySuzhou 215009China College of materials Science and Engineering Guilin University of TechnologyGuilin 541004China key laboratory of advanced Electrode materi{4. for Novel Solar Cells for petroleum and Chemical Industry of china Suzhou University of Science and TechnologySuzhou 215009China School of Science and key laboratory of Biomedical Functional materials China Pharmaceutical UniversityNanjing 211198China School of physics and materials Science Guangzhou UniversityGuangzhou 510006China School of physics and materials Science Nanchang UniversityNanchang 330031China School of physics and Information technology Shaanxi Normal UniversityXi'an 710062China School of physics and technology Wuhan UniversityWuhan 430072China

Triboelectrification,a process that transforms mechanical energy into electrical energy through friction,holds promise for eco-friendly wastewater *** study delves into the enhancement of tribocatalytic dye degradation using SrTiO_(3),a material notable for its non-piezoelectric and centrosymmetric *** synthesis of uni-and bi-doped SrTiOs particles,achieved through a solid-state reaction at 100℃,results in a high-purity cubic perovskite *** with rhodium(rh)and carbon(C)causes crystal lattice contraction,internal stress,and significant oxygen *** changes notably improve tribocatalytic efficiency under solar irradiation,with rh-doped SrTiO_(3) demonstrating an impressive degradation rate of approximately 88% for rhodamine B(rhB),along with reaction rate constants near 0.9 h^(-1) at 554.nm and a noticeable *** study highlights that defects introduced by doping are integral to this process,boosting catalytic activity through energy state modification and enhancing surface redox radical ***,these defects are instrumental in generating a flexoelectric field,which markedly influences the separation of electron-hole pairs under solar *** findings illuminate the complex interplay between material composition,defect states,and environmental conditions,paving the way for advanced strategies in environmental remediation through optimized tribocatalytic activity.

关键词： tribocatalysis SrTiO_(3)(STO) doping-induced defects blueshift flexoelectric field