CAJ | 학술논문

采用液相脉冲放电技术,在NiSO_4溶液中用NaH_2PO_2为还原剂,制备出了Ni-P合金超细粉体材料.将Ni-P合金粉在200～450℃下退火处理,并通过X射线衍射(XRD)、透射电镜(TEM)和场发射扫描电镜(FESEM)对退火前后Ni-P合金粉的结构、形貌进行了分析.用振动样品磁强计(VSM)对Ni-P合金粉进行了磁性能分析.结果表明所制备的超细Ni-P合金粉为非晶结构,颗粒直径在300～500nm之间,颗粒之间紧密结合成链枝状形貌.Ni-P合金粉在250～280℃退火后具有良好的软磁性能,250℃退火后矫顽力降低至0.437×10~(-4)T.
채용액상맥충방전기술,재NiSO_4용액중용NaH_2PO_2위환원제,제비출료Ni-P합금초세분체재료.장Ni-P합금분재200～450℃하퇴화처리,병통과X사선연사(XRD)、투사전경(TEM)화장발사소묘전경(FESEM)대퇴화전후Ni-P합금분적결구、형모진행료분석.용진동양품자강계(VSM)대Ni-P합금분진행료자성능분석.결과표명소제비적초세Ni-P합금분위비정결구,과립직경재300～500nm지간,과립지간긴밀결합성련지상형모.Ni-P합금분재250～280℃퇴화후구유량호적연자성능,250℃퇴화후교완력강저지0.437×10~(-4)T.
Ultrafine nickel-phosphorus powders were prepared by pulse discharging in NiSO_4 solution containing the reducing agent of NaH_2PO_2.The nickel-phosphorus powders were annealed at temperatures ranging from 200-450℃ and then analyzed by TEM,FESEM and XRD.The magnetic properties of the products was characterized by VSM.The results showed that the ultrafine nickel-phosphorus powders were amorphous.The grains with diameters between 300 and 500nm were linked tightly in the form of chain-liked structures.Excellent soft magnetic performance was obtained after annealing at a temperature of 250 or 280℃,and the coercivity of nickel-phosphorus powders was reduced to 0.437×10~(-4)T after annealing at the temperature of 250℃.