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变形和能量注入协同作用制备可控非晶纳米晶结构超高饱和磁化强度FeCoB粉末

Science China Materials 2024年第6期67卷 1985-1993页

作者：李枧邵里良白荣晟周靖童星林怀俊张猛柯海波汪卫华 Institute of Advanced Wear&Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

非晶纳米晶磁粉芯(ANMPCs)是电子元器件在高频应用的关键软磁材料.但其相对较低的饱和磁化强度无法满足器件的小型化要求.强Fe-Co交换耦合非晶纳米晶粉是制备高磁化强度ANMPCs的潜在材料.本文采用机械球磨法制备了一系列(Fe_(0.8)Co_(0.... 详细信息

非晶纳米晶磁粉芯(ANMPCs)是电子元器件在高频应用的关键软磁材料.但其相对较低的饱和磁化强度无法满足器件的小型化要求.强Fe-Co交换耦合非晶纳米晶粉是制备高磁化强度ANMPCs的潜在材料.本文采用机械球磨法制备了一系列(Fe_(0.8)Co_(0.2))_(87)B_(13)软磁粉末,这些粉末的非晶相、纳米晶相含量和粒径可调.在球磨过程中,出现了合金化、玻璃化和纳米化三个阶段以及粉末形貌和尺寸的非线性变化,进而导致ANMPCs软磁性能的非单调变化.磁粉具有超高饱和磁化强度达239 emu g^(-1),有效磁导率为33.球磨150 h后,FeCoB粉末非晶-纳米晶双相结构达到动态平衡,同时粒径达亚微米尺度,从而提高了粉末高频稳定性且降低了磁芯损耗.在变形和能量注入的协同作用下,机械球磨实现了含极高铁磁元素的非晶-纳米晶双相粉末可控制备、提高了高磁化强度ANMPCs综合软磁性能.

关键词： amorphous-nanocrystalline magnetic powder core mechanical ball milling ultrahigh ferromagnetic element sa-turation magnetization high-frequency properties

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Enhanced cycling stability of antimony anode by downsizing particle and combining carbon nanotube for high-performance sodium-ion batteries

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Journal of Materials Science & Technology 2020年第20期52卷 81-88页

作者： Chuang Liu Fanxin Zeng Li Xu Shuangyu Liu Jincheng Liu Xinping Ai Hanxi Yang Yuliang Cao College of Chemistry and Molecular Sciences Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and EnergyWuhan UniversityWuhan 430072China State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing 102211China EVE Energy Co.ltd. No.36Huifeng 7th RoadZhongkai Hi-Tech ZoneHuizhouChina

Antimony(Sb)nanoparticles(SbNP)encapsulated in multiwalled carbon nanotubes(MWCNTs)matrix has been fabricated by a facile two-step ball milling strategy,including a sand milling process to prepare Sb nanoparticles and following high-energy ball milling to synthesize SbNP-MWCNT *** an anode material for sodium-ion batteries(SIBs),the SbNP-MWCNT composite with high Sb content(80%)can deliver a reversible capacity of 471.1 mA hg^(-1)at 50 mA g^(-1)with an initial coulombic efficiency of 73.5%,excellent cycling stability(94.1%capacity retention at 800 mA g^(-1))and high rate capability(210.7 mA h g^(-1)at 3200 mA g^(-1)).The excellent electrochemical performance of the SbNP-MWCNT composite results from the synergistic effect of downsizing Sb particles and combining MWCNTs.

关键词： Antimony Nanoparticles Carbon nanotubes Anode Sodium ion battery mechanical ball milling

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Synthesis of ZrSiO_4 and Coesite in SiO_2-ZrO_2 System Under High Pressure

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Chemical Research in Chinese Universities 2008年第2期24卷 135-137页

作者： XUE Yan-feng XU Da-peng ZHANG Guang-qiang ZHOU Xian-feng DING Zhan-hui LIU Xiao-mei SU Wen-hui College of Physics Jilin University Changchun 130012 P. R. China Center for the Condensed-MatterScience and Technology Harbin Institute of Technology Harbin 150001 P. R. China International Center for Materials Physics Chinese Academy of Sciences Shenyang 110015 P. R. China

ZrSiO4 and coesite were obtained under high-pressure and high-temperature from the nano precursor of a-SiO2 and ZrO2. XRD and Raman measurements indicate that ZrSiO4 was formed at a temperature higher than 920 ℃ under a pressure of 3.6 GPa. As the pressure increased to 3.9 GPa, the ZrSiO4 formation temperature was reduced to 815 ℃. The formation temperature for coesite was 990 ℃ under 3.9 GPa. The lower formation temperature for ZrSiO4, as compared to that for coesite, provided an experimental evidence that the coesite in the Earth＇s surface usually occurs as inclusions in ZrSiO4.

关键词： ZrSiO4 Coesite High pressure synthesis mechanical ball milling

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Study on Al-Li3AlH6-CaO Composite for Hydrogen Production Performance

Study on Al-Li3AlH6-CaO Composite for Hydrogen Production Pe...

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第七届中国储能与动力电池及其关键材料学术研讨与技术交流会

作者： Xiang-fei Zhang Fen Xu Li-xian Sun Fang Yu Chong Zhao Guangxi Key Laboratory of Information Laboratory Guangxi Collaborative InnovationCenter of Structure and Property for New Energy MaterialsFaculty of Material Science&EngineeringGuilin University of Electrical Technology

The Al-LiAlH composite as a promising hydrogen production material has attracted increasing ***,the poor stability limits practical *** this paper,the Al-LiAlH-CaO composite has been synthesized by ball *** results show that the increase of the amount of added CaO can enhance the rate of the hydrogen *** rate of the hydrogen generation reaches 40.1%when the amount of added CaO is 30 wt%,which is due to the fact that the added CaO can destroys the AlO *** influence of amount of added CaO on the corrosion resistant of the Al-LiAlH-CaO is also *** Al-LiAlH-CaO with 35 wt%CaO exhibits well corrosion resistant performance,and the hydrogen yield decreases by 22.65%in 30 days,while the hydrogen yield of the Al-LiAlH-CaO without CaO drops by 45.4%in 5 days.

关键词： Al-Li3AlH6-CaO composite Hydrogenproduction Corrosion resistance mechanical ball milling

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