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CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen wei Chen Xiang Chen xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui xiaohao Cui Zhaoyuan Cui Brunella D'Anzi ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

Brain-derived neurotrophic factor, sex hormones and cognitive decline in male patients with schizophrenia receiving continuous antipsychotic therapy

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World Journal of Psychiatry 2023年第12期13卷 995-1004页

作者： Jin li Wen-huan xiao Fei Ye xiao-wei Tang Qiu-fang Jia xiao-Bin Zhang Department of Psychiatry The Affiliated Guangji Hospital of Soochow UniversitySuzhou 215137Jiangsu ProvinceChina Department of Psychiatry Affiliated Wutaishan Hospital of Medical College of Yangzhou UniversityYangzhou 225000Jiangsu ProvinceChina

BACKGROUND There are systematic differences in clinical features between women and men with schizophrenia(SCZ).The regulation of sex hormones may play a potential role in abnormal neurodevelopment in ***-derived neurotrophic factor(BDNF)and sex hormones have complex interacting actions that contribute to the etiology of *** To investigate the influence of BDNF and sex hormones on cognition and clinical symptomatology in chronic antipsychotic-treated male SCZ *** The serum levels of follicle-stimulating hormone,luteinizing hormone(LH),estradiol(E2),progesterone,testosterone(T),prolactin(PRL)and BDNF were compared between chronic antipsychotic-treated male(CATM)patients with SCZ(n=120)and healthy controls(n=120).The Positive and Negative Syndrome Scale was used to quantify SCZ symptoms,while neuropsychological tests were used to assess *** tests,such as the Digit Cancellation Test(DCT),Semantic Verbal Fluency(SVF),Spatial Span Test(SS),Paced Auditory Serial Addition Test(PASAT),Trail Making Task(TMT-A),and Block Design Test(BDT),were used to assess executive functions(BDT),attention(DCT,TMT-A),memory(SS,PASAT),and verbal proficiency(SVF).RESULTS Although E2 levels were significantly lower in the patient group compared to the healthy controls,T,PRL,and LH levels were all significantly ***,the analysis revealed that across the entire sample,there were positive correlations between E2 Levels and BDNF levels as well as BDNF levels and the digital cancellation *** CATM patients with SCZ,a significant correlation between the negative symptoms score and PRL levels was *** Sex hormones and BDNF levels may also be linked to cognitive function in patients with chronic SCZ.

关键词： Brain-derived neurotrophic factor Clinical symptoms Cognitive function Schizophrenia Sex hormones

Roles of Serum Amyloid A 1 Protein Isoforms in Rheumatoid Arthritis

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Engineering 2022年第3期8卷 174-182页

作者： Elaine Laihan Leung huan-ling Lai Run-Ze li Hu-Dan Pan Ze-Bo jiang Ying li Fu-Gang Duan Jia-Hui Xu Yi-Zhong Zhang A-Xi Shi Chun-li wei fang-Yuan Zhang xiao-Jun Yao liang liu State Key Laboratory of Quality Research in Chinese Medicine&Macao Institute for Applied Research in Medicine and Health&Faculty of Chinese Medicine Macao University of Science and TechnologyMacao 999078China Department of Pediatrics Pennsylvania State University College of MedicineHersheyPA 17033USA

Secondary amyloid A amyloidosis,a lethal complication,is induced when acute or chronic infection coexists with over-secretion of the serum amyloid A 1(SAA1)protein and deposition in key internal ***,using the whole-exome sequencing method,we identified a novel deleterious mutation SAA1.2 in rheumatoid arthritis(RA)***,the role of SAA1 in RA pathogenesis and its complications remains *** purpose of this study was to determine the pathogenetic roles of SAA1 protein isoforms in RA *** modified an experimental adenovirus infection protocol to introduce SAA1.2 gene alleles into the knee joints of mice and used SAA1.3 and SAA1.5 as *** tomography analysis was applied to determine changes in bone morphology and ***(IHC)analysis,flow cytometry,enzyme-linked immunosorbent assay(EliSA),and real-time polymerase chain reaction(RT-PCR)were used to investigate disease progression and cytokine alterations in the course of adenoviral SAA-induced knee joint inflammation and bone *** found that the arthritis-inducing effect of SAA1.2 transcription in the knee joints and mutant SAA1 protein secretion in blood resulted in the stimulation of immune responses,leading to CD8^(+)T cell and pro-inflammatory cytokine elevation,such as interleukin(IL)-6,IL-22,matrix metalloproteinase(MMP)-3,MMP-9,with subsequent synovial inflammation and bone *** findings indicate that SAA1 protein isoforms,particularly SAA1.2,play a significant role in the induction and progression of RA and may have potential value in the early diagnosis and severity prediction of RA.

关键词： Serum amyloid A 1 Rheumatoid arthritis Pathogenetic Intra-articular

A systematic survey of PRMT interactomes reveals the key roles of arginine methylation in the global control of RNA splicing and translation

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Science Bulletin 2021年第13期66卷 1342-1357,M0004页

作者： huan-huan wei xiao-Juan Fan Yue Hu xiao-Xu Tian Meng Guo Miao-wei Mao Zhao-Yuan fang Ping Wu shuai-Xin Gao Chao Peng Yun Yang Zefeng Wang CAS Key Laboratory of Computational Biology Bio-Med Big Data CenterShanghai Institute of Nutrition and HealthCAS Center for Excellence in Molecular Cell ScienceUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China National Facility for Protein Science in Shanghai Zhang-Jiang LabShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Xijing Hospital of Digestive Diseases Fourth Military Medical UniversityXi’an 710000China

Thousands of proteins undergo arginine methylation,a widespread post-translational modification catalyzed by several protein arginine methyltransferases(PRMTs).However,global understanding of their biological functions is limited due to the lack of a complete picture of the catalytic network for each ***,we systematically identified interacting proteins for all human PRMTs and demonstrated their functional importance in mRNA splicing and *** demonstrated significant overlapping of interactomes of human PRMTs with the known methylarginine-containing *** PRMTs are functionally redundant with a high degree of overlap in their substrates and high similarities between their putative methylation ***,RNA-binding proteins involved in regulating RNA splicing and translation contain highly enriched arginine methylation ***,inhibition of PRMTs globally alternates alternative splicing(AS)and suppresses *** particular,ribosomal proteins are extensively modified with methylarginine,and mutations in their methylation sites suppress ribosome assembly,translation,and eventually cell ***,our study provides a global view of different PRMT networks and uncovers critical functions of arginine methylation in regulating mRNA splicing and translation.

关键词： Post-translational modification Protein arginine methyltransferase RNA-binding protein Ribosomal proteins Alternative splicing mRNA translation

Optimization of both coercivity and knee-point magnetic field of Sm2Co17-type magnets via solid solution process

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Journal of Rare Earths 2020年第11期38卷 1224-1230,I0003页

作者： shuai Wang Yikun fang Kuikui Song xiaoyu Zhu Lei Wang wei Sun wei Pan Minggang Zhu wei li Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing 100081China National Engineering Research Center for Magnetic Materials Beijing 102600China

It is confirmed that phase homogenization is very important for improving the magnetic properties of 2:17-type Sm-Co sintered magnets,In this work,the influence of solid solution process on microstructure and magnetic properties of the Sm(CobalFe0.233Cu0.073Zr0.024)7.6 sintered magnets was systematically *** the solid-solution treating duration(tS)increasing from 0 to 4 h,intrinsic coercivity(Hcj)increases from 12.83 to 36.54 kOe,magnetic field at knee-point(Hknee)increases from2.76 to 19.14 kOe,and the maximum energy product increases from 19.79 to 29.48 *** electron probe microanalyzer results reveal that there mainly exist gray and dark regions besides"white"rare earth-rich phase,and the conte nt of Sm,Fe and Cu elements for the two kinds of regions changes a lot for the specimens,Furthermore,with tS increasing up to 4 h,the elements content deviation between the gray and dark regions becomes small gradually from 3.94 at%to 0.27 at%,7.66 at%to 0.21 at%and 7.27 at%to 0.16 at%for Sm,Fe and Cu elements,***,transmission electron microscopy results show that the distribution of cell size is much more concentrated for aged specimens when tS is 4 *** is also found that the Cu concentration at cell boundaries for the 4 h solid-solution treatment case shows relatively higher values and greater concentration gradient(1.94 at%/nm).It is verified that sufficient solution treatment duration is prerequisite to form these homogeneous microstructural features,which are the key points for obtaining both high Hcj and Hknee.

关键词： Sm-Co magnets Solid solution process Coercivity Microstructure Cell size Rare earths

One-year status of hepatic venous pressure gradient measurement from 85 hospitals in China

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Portal Hypertension & Cirrhosis 2024年第2期3卷 116-123页

作者： Jitao Wang Ting Cui linpeng Zhang Zhiping Yan Lei li Jinjun Chen Junhui Sun Hua Xiang He Zhu Hao Wu Jiancuo Gengzang Feng Zhang wei Wu Guohong Cao Wuhua Guo Haibin Shi Hui Xue Guangjun huang Qiang Yu Meng Niu Huiling Xiang Derun Kong wei Gou Xuefeng Luo Fuliang He Min Yuan wei liu Yong Wang Hongjie Hu xiaoli Zhu Tao Yu Qinxue Sun wei Qu Ting Lu Deqiang Ma li Zhang Jun Ma Jun Yang Ketao Mu xiaoliang Zhu Kai Xiong Huiguo Ding Shengjuan Yao Mingsheng huang fang Wang Zexin Wang Yong huang Jianan li Hongfeng Yi Birun huang Zhongwei Zhao Duiping Feng Yanming Lei Changlong Hou Wenbo Guo Shirong liu Gaojun Teng Kangshun Zhu Fan Wu xiaogang Hu Wenfeng Zhang Shaoqi Yang Zhouchao Hu Pengfei Pang Shaowu Zhuang weidong Wang Qingliang Zhu Kunpeng Zhang Chengyu liu Dongliang li Chao Ma Hong jiang Xingong Zhao weixin Ren Zhiwei Wang Lei Yu Fuhuang lin Chaoguang Yan Feng Wang Lei Yu Hui huan Wenyong Shen Shaofei He Chengda Zhang Jinlun Bao jiangtao liu Jun Wu Jianbo Zhao Jian Zhang xiaolong Qi Hebei Provincial Key Laboratory of Cirrhosis&Portal Hypertension Xingtai People's HospitalXingtaiHebeiChina Center of Portal Hypertension Department of RadiologyZhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsuChina Department of Interventional Therapy Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijingChina Department of Intervention Taiyuan Third People's HospitalTaiyuanShanxiChina Department of Intervention Zhongshan Hospital Affiliated to Fudan UniversityShanghaiChina Department of Interventional Medicine The First Hospital of Lanzhou UniversityLanzhouGansuChina Department of Infectious Diseases Nanfang Hospital of Southern Medical UniversityGuangzhouGuangdongChina Hepatobiliary and Pancreatic Intervention Center The First Affiliated Hospital of Zhejiang University School of MedicineHangzhouZhejiangChina Interventional Vascular Surgery Hunan Provincial People's HospitalChangshaHunanChina Department of Intervention Sixth People's Hospital of ShenyangShenyangLiaoningChina Department of Gastroenterology West China Hospital of Sichuan UniversityChengduSichuanChina Department of Intervention The Fourth People's Hospital of Qinghai ProvinceXiningQinghaiChina Department of Gastroenterology Nanjing Drum Tower HospitalNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina Department of Radiology Shulan(Hangzhou)HospitalHangzhouZhejiangChina Department of Intervention Mengchao Hepatobiliary Hospital of Fujian Medical UniversityFuzhouFujianChina Department of Interventional Radiology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Department of Interventional Radiology Fifth Medical Center

Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in *** article aimed to investigate the status of hepatic venous pressure gradient measurement in China in ***:We investigated the overall status of HVPG technology in China-including hospital distribution,hospital level,annual number of cases,catheters used,average cost,indications,and current challenges by using online *** counting the number and percentages of cases of these results,we hope to clarify the current status of HVPG measurements in ***:According to the survey,85 hospitals in China used HVPG technology in 2022 distributed across 29 provinces.A total of 4989 HVPG measurements were performed in all of the surveyed hospitals in 2022,of which 2813 cases(56.4%)were measured *** average cost of HVPG measurement was 5646.8±2327.9 *** the clinical teams who performed the measurements(sometimes multiple per hospital),94.3%(82/87)used the balloon method,and the majority of the teams(72.4%,63/87)used embolectomy ***:This survey clarified the clinical application status of HVPG in China and confirmed that some medical institutions in China have established a foundation for this *** is still necessary to continue promoting and popularizing this technology in the future.

关键词： application status hepatic vein pressure gradient questionnaire survey

Cellular microstructure modification and high temperature performance enhancement for Sm2Co17-based magnets with different Zr contents

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Journal of Materials Science & Technology 2022年第25期120卷 8-14页

作者： Chao Wang Peng Shen Yikun fang shuai Wang Qiangfeng li Lei Wang wei li Minggang Zhu Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing 100081China

Influence of Zr contents on high-temperature magnetic performance of Sm(CoFeCuZr)(x=0.025,0.03,0.035,0.04) magnets were *** x increases from 0.025 to 0.04,the temperature coefficient of intrinsic coercivity(H) is optimized from-0.1673% K^(-1)to-0.1382% K^(-1)and the Hat 773 K gradually increases from 556.32 kA m^(-1)to 667 kA m^(-1).The microstructure and microchemistry of different Zr-content magnets were revealed by a transmission electron microscope equipped with *** increasing Zr content induces that the average size of cells decreases from ~76 nm to ~56 nm and the weight fraction of 1:5 H cell boundary phase increases from ~25% to ~37% as well,resulting decreasing of the average Cu content at cell boundaries from 13.59 at% to ~8.52 at%.It is found that the Cu-lean characteristic at cell boundary phase is the reason that gives rise to higher magnetic properties at elevated temperatures for x=0.04 magnet.

关键词： Sm2Co17-type magnets Zr content High temperature magnetic properties FROC diagram

草莓MYB基因家族的鉴定及在果实不同着色期的表达分析

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农业生物技术学报 2024年第6期32卷 1250-1273页

作者：梁卫王海丰勇青张澳宁田雪纯南昕彤李文芳刘飞云马宗桓甘肃农业大学园艺学院兰州金益昇农业科技有限责任公司

果实着色主要由花青素等黄酮类化合物决定，MYB类转录因子在花青素调控中起着重要的作用。为探究草莓(Fragaria vesca) MYB基因家族对草莓果实着色的作用，本研究通过对拟南芥(Arabidopsis thaliana)和草莓基因数据库的MYB基因家族序列... 详细信息

果实着色主要由花青素等黄酮类化合物决定，MYB类转录因子在花青素调控中起着重要的作用。为探究草莓(Fragaria vesca) MYB基因家族对草莓果实着色的作用，本研究通过对拟南芥(Arabidopsis thaliana)和草莓基因数据库的MYB基因家族序列进行同源比对，鉴定出草莓MYB基因家族成员114个。通过生物信息学分析软件对草莓MYB基因家族进行染色体定位、理化性质、亚细胞定位和二级结构分析，确定基因的命名和主要表达的位置；通过共线性、基因结构、启动子顺式作用元件预测等对基因家族进行划分并预测其功能。结果表明，MYB家族成员主要在细胞核中表达；除了FvMYB7外其余都为亲水蛋白；114个成员中有107个蛋白之间存在相互作用；有1个高频密码子的相对同义密码子使用度大于2.0，表明草莓MYB基因中存在极强偏好性的密码子；根据系统进化树可将114个成员分为3个亚族；除FvMYB72不含有任何作用元件，其他成员均含有光、非生物胁迫、激素、分生组织响应元件。q RT-PCR分析表明，大多数成员均在S3时期(50%着色期)相对表达量高，但FvMYB33、FvMYB57、FvMYB75在S4时期(完全着色期)表达量较高；组织特异性表达谱结果表明，只有FvMYB33在果皮中特异性表达，且其花青素含量在S4时期最高；推测FvMYB33为调控草莓果实着色的主要基因。本研究为MYB基因家族在草莓果实着色中的作用机制提供了参考。

关键词： MYB基因家族花青素 qRT-PCR 生物信息学分析

Optimization of microstructures and magnetic properties of Sm(Co_(bal)Fe_(0.227)Cu_(0.07)Zr_(0.023))_(7.6) magnets by sintering treatment

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Journal of Rare Earths 2019年第2期37卷 171-177页

作者： Kuikui Songa wei Suna Yikun fang shuai Wang Nengjun Yu Meiling Zhang Minggang Zhu wei li Division of Functional Materials Research Central Iron and Steel Research Institute

Magnetic properties and microstructures of Sm(Co_(bal)Fe_(0.227)Cu_(0.07)Zr_(0.023_)_(7.6) sintered magnets were optimized by sintering treatment. Results show that the knee-point magnetic field, Hknee, is twofold up and the intrinsic coercivity Hcjincreases by 40%, ranging from 21.64 to 30.39 kOe at the cost of a little decrease of Brfrom 10.84 to 10.31 kGs with sintering temperature decreasing from 1488 to 1473 K. And the average domain width is narrower and more uniform for the specimen sintered at 1473 K than that of the specimen sintered at 1488 K. It is impressive that the density of lamellar phase increases from ~0.050 to ~0.058 nm^(-1) with the sintering temperature decreasing from 1488 to 1473 K. Moreover, the average cellular size is about ~84 nm for the magnets sintered at 1473 K, which is 80% of that of the magnets sintered at 1488 K(~97 nm). And the cell boundary width of the magnets sintered at 1473 K(~7 nm) is only half average width of the magnets sintered at 1488 K(~14 nm). It is found that the Cu content in the cell boundaries is much higher(~17 at%) in the magnets sintered at 1473 K compared to that of the magnets sintered at 1488 K(~10 at%). It can be concluded that smaller cells and narrower cell boundaries together with higher gradient of Cu content are key points for obtaining the optimum Hkneeand Hcj.

关键词： Sm-Co magnets Sintering Coercivity Microstructure Rare earths