CN111081444B - R-t-b系烧结磁体及其制备方法 - Google Patents

R-t-b系烧结磁体及其制备方法 Download PDF

Info

Publication number
CN111081444B
CN111081444B CN202010016222.8A CN202010016222A CN111081444B CN 111081444 B CN111081444 B CN 111081444B CN 202010016222 A CN202010016222 A CN 202010016222A CN 111081444 B CN111081444 B CN 111081444B
Authority
CN
China
Prior art keywords
content
temperature
sintered magnet
percentage
hydrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010016222.8A
Other languages
English (en)
Other versions
CN111081444A (zh
Inventor
施尧
蓝琴
黄佳莹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Jinlong Rare Earth Co ltd
Original Assignee
Xiamen Tungsten Co Ltd
Fujian Changting Jinlong Rare Earth Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Tungsten Co Ltd, Fujian Changting Jinlong Rare Earth Co Ltd filed Critical Xiamen Tungsten Co Ltd
Publication of CN111081444A publication Critical patent/CN111081444A/zh
Priority to US17/784,996 priority Critical patent/US20230021772A1/en
Priority to EP20909158.6A priority patent/EP4086924A4/en
Priority to JP2022539202A priority patent/JP7312916B2/ja
Priority to PCT/CN2020/100575 priority patent/WO2021135143A1/zh
Priority to TW109145204A priority patent/TWI738592B/zh
Application granted granted Critical
Publication of CN111081444B publication Critical patent/CN111081444B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/02Making ferrous alloys by powder metallurgy
    • C22C33/0257Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047Alloys characterised by their composition
    • H01F1/053Alloys characterised by their composition containing rare earth metals
    • H01F1/055Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0577Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/1017Multiple heating or additional steps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/023Hydrogen absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/04Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/005Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/10Ferrous alloys, e.g. steel alloys containing cobalt
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273Imparting anisotropy
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0293Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • B22F2003/248Thermal after-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/04Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/043Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/04Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/044Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by jet milling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/04Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/048Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by pulverising a quenched ribbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00Aspects linked to processes or compositions used in powder metallurgy

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)

Abstract

本发明公开了R‑T‑B系烧结磁体及其制备方法。该R‑T‑B系烧结磁体包含:R、B、Ti、Ga、Al、Cu和T,其含量如下:R的含量为29.0~33%;B的含量为0.86~0.93%;Ti的含量为0.05~0.25%;Ga的含量为0.3~0.5%,但不为0.5%;Al的含量为0.6~1%,但不为0.6%;Cu的含量为0.36~0.55%;所述百分比为质量百分比。本发明通过采用低B技术,在不添加或少量添加重稀土的情况下,既提高了R‑T‑B系烧结磁体的剩磁性能,也保证了磁体的矫顽力和方形度。

Description

R-T-B系烧结磁体及其制备方法
本申请要求申请日为2019年12月31日的中国专利申请CN201911423952.3的优先权。本申请引用上述中国专利申请的全文。
技术领域
本发明涉及R-T-B系烧结磁体及其制备方法。
背景技术
R-T-B系烧结磁铁(R指稀土元素,T指过渡金属元素及第三主族金属元素,B指硼元素)由于其优异的磁特性而被广泛应用于电子产品、汽车、风电、家电、电梯及工业机器人等领域,例如硬盘、手机、耳机、和电梯曳引机、发电机等永磁电机中作为能量源等,其需求日益扩大,且各产商对于磁铁性能例如剩磁、矫顽力性能的要求也逐步提升。
实验中发现,在R-T-B系烧结磁体制备的过程中容易析出R2Fe17相,进而使得磁体的矫顽力性能劣化。现有技术中,有通过添加重稀土元素例如Dy、Tb、Gd等,以提高材料的矫顽力以及改善温度系数,但重稀土价格高昂,采用这种方法提高R-T-B系烧结磁体产品的矫顽力,会增加原材料成本,不利于R-T-B系烧结磁体的应用。
因此,需要在不添加或少量添加重稀土的情况下,制备得到高矫顽力的R-T-B系烧结磁铁。例如专利CN106128673A,制备了烧结钕铁硼磁体(剩磁12.77kGs、矫顽力22.42kOe)。但是其B含量较高,会生成较多的富B相,进而影响到产品的剩磁性能。该现状亟待解决。
发明内容
本发明所要解决的技术问题在于解决现有技术中在不添加或少量添加重稀土(重稀土RH添加量≤1)的情况下,难以制备得到高矫顽力且高剩磁的R-T-B系烧结磁铁的问题,而提供了R-T-B系烧结磁体及其制备方法。本发明在不添加或少量添加重稀土的情况下,通过微量的Ti、以及Ga、Al、Cu和Co的联合添加,抑制R2Fe17相的析出,并在时效过程中在晶界生成高Cu低Al相Rx-(Cua-Gab-Alc)y,大幅提升了磁体的矫顽力。
本发明通过以下技术方案解决上述技术问题。
本发明公开了R-T-B系烧结磁体,其包含:R、B、Ti、Ga、Al、Cu和T,其含量如下:
R的含量为29.0~33%;
B的含量为0.86~0.93%;
Ti的含量为0.05~0.25%;
Ga的含量为0.3~0.5%,但不为0.5%;
Al的含量为0.6~1%,但不为0.6%;
Cu的含量为0.36~0.55%;
其中,R为至少含有Nd的稀土元素,B为硼,Ti为钛,Ga为镓,Al为铝,Cu为铜,T包含Fe和Co;所述百分比为质量百分比。
本发明中,所述R的含量可为本领域常规。较佳地,所述R的含量为30.2~33%,例如为30.2%、31.5%、33%;所述百分比为质量百分比。
本发明中,所述R为包含重稀土元素RH的稀土元素。较佳地,所述R中,RH的含量为0或不大于1%,例如为0%、0.5%;所述百分比为质量百分比。
本发明中,采用低B技术,可有效地实现在无重稀土或重稀土添加量(RH=0或RH≤1)较少的情况下,得到高性能R-T-B系烧结磁体。本发明中,B的含量在0.86~0.93%之间,若B含量小于0.86%的话,磁体的方形度会变的较差;B含量大于0.93%的话,达不到高性能。
较佳地,所述B的含量为0.915~0.93%,例如为0.915%、0.92%、0.93%;所述百分比为质量百分比。
本发明中,较佳地,所述R-T-B系烧结磁体包含主相和晶界相;其中,所述主相包含R2T14B,所述晶界相包含Rx-(Cua-Gab-Alc)y和稀土氧化相;
其中,x/y=1.5~3;a/b=2~5;(a+b)/c=30~70;
所述主相的含量为94~98%;所述Rx-(Cua-Gab-Alc)y的含量为1~3.5%;所述稀土氧化相的含量为1~2.5%,所述百分比为体积百分比。
更佳地,所述晶界相Rx-(Cua-Gab-Alc)y中,x/y=1.5~3,a:b:c=(10~40):(6~19):1。
本发明中,通过Ti、Ga、Al、Cu的适量添加,有效地抑制了R2T17的析出。发明人发现,虽然加入了较多的Al,但由于微量的Ti的一同添加,制得的R-T-B系烧结磁体在晶界并没有形成高Al的晶界相,而是形成了高Cu低Al的晶界相Rx-(Cua-Gab-Alc)y,该相的生成可起到修饰晶界的作用,改善晶界相的浸润角以及流动性,使得晶界相在主相之间流动更为容易,进而晶界相变得轻薄连续,既起到去磁耦合的作用又增加了主相的体积分数,得到了Br与Hcj均优异的磁体。其中,所述氧化稀土相,本领域技术人员知晓,是由于不可避免的氧化反应而得。
较佳地,所述Ti的含量为0.15~0.25%,例如为0.15%、0.2%、0.25%;所述百分比为质量百分比。
较佳地,所述Ga的含量为0.3~0.455%,例如为0.3%、0.4%、0.455%;所述百分比为质量百分比。
较佳地,所述Al的含量为0.65~1%,但不为1%,例如为0.65%、0.7%、0.8%、0.9%;所述百分比为质量百分比。
较佳地,所述Cu的含量为0.45~0.55%,例如为0.45%、0.5%、0.55%;所述百分比为质量百分比。
本发明中,所述Fe和Co的含量为本领域常规。
较佳地,所述Fe和Co的含量为占100%质量百分比的余量;所述百分比为质量百分比。
更佳地,所述Co的含量为0.5~3%,例如为0.5%、1.5%、3.0%;所述百分比为质量百分比。
更佳地,所述Fe的含量为60~68%;所述百分比为质量百分比。
本发明中,所述R-T-B系烧结磁体包含不可避免的杂质以及制备过程中引入的O、N或C。
较佳地,所述R-T-B系烧结磁体中C、N和O的含量总和为1000ppm~3500ppm。
在本发明一优选实施方式中,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,B的含量为0.92%,Co的含量为0.5%;Al的含量为0.9%,Cu的含量为0.45%,Ga的含量为0.455%,Ti的含量为0.2%,Fe为余量;所述百分比为质量百分比。
在本发明一优选实施方式中,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,B的含量为0.92%,Co的含量为0.5%;Al的含量为1.0%,Cu的含量为0.5%,Ga的含量为0.455%,Ti的含量为0.2%,Fe为余量;所述百分比为质量百分比。
在本发明一优选实施方式中,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,Dy的含量为0.5%;B的含量为0.915%,Co的含量为0.5%;Al的含量为0.7%,Cu的含量为0.55%,Ga的含量为0.455%,Ti的含量为0.25%,Fe为余量;所述百分比为质量百分比。
在本发明一优选实施方式中,所述R-T-B系烧结磁体,其包含:Nd的含量为30.2%,B的含量为0.93%,Co的含量为1.5%;Al的含量为0.65%,Cu的含量为0.4%,Ga的含量为0.3%,Ti的含量为0.15%,Fe为余量;所述百分比为质量百分比。
在本发明一优选实施方式中,所述R-T-B系烧结磁体,其包含:Nd的含量为33%,B的含量为0.86%,Co的含量为3.0%;Al的含量为0.8%,Cu的含量为0.36%,Ga的含量为0.4%,Ti的含量为0.05%,Fe为余量;所述百分比为质量百分比。
本发明还提供了R-T-B系烧结磁体,其特征在于,其包含主相和晶界相;其中,所述主相包含R2T14B,所述晶界相包含Rx-(Cua-Gab-Alc)y和稀土氧化相;
其中,x/y=1.5~3;a/b=2~5;(a+b)/c=30~70;
所述主相的含量为94~98%;所述Rx-(Cua-Gab-Alc)y的含量为1~3.5%;所述稀土氧化相的含量为1~2.5%,所述百分比为体积百分比。
较佳地,所述晶界相Rx-(Cua-Gab-Alc)y中,x/y=1.5~3,a:b:c=(10~40):(6~19):1。
本发明还公开了一种如前所述的R-T-B系烧结磁体的制备方法,其步骤包括:将R-T-B系烧结磁体的原料依次进行熔炼、铸造、氢破、气流磨、成型、烧结和时效,即可。
本发明中,所述R-T-B系烧结磁体的原料,本领域技术人员知晓为满足如前所述R-T-B系烧结磁体的元素含量质量百分比的原料。
本发明中,所述熔炼的操作和条件可为本领域常规。
较佳地,在高频真空熔炼炉中,将所述原料熔炼。
较佳地,所述熔炼炉的真空度小于0.1Pa。
更佳地,所述熔炼炉的真空度小于0.02Pa。
较佳地,所述熔炼的温度为1450~1550℃。
更佳地,所述熔炼的温度为1500~1550℃。
本发明中,所述铸造的操作和条件可为本领域常规,一般在惰性气氛中进行,得到R-T-B合金铸片。
较佳地,所述铸造在Ar气氛条件下进行。
较佳地,所述铸造的气氛压力为20~70kPa。
更佳地,所述铸造的气氛压力为30~50kPa。
较佳地,所述铸造的铜辊转速为0.4~2m/s,例如为1m/s。
较佳地,所述铸造得到的R-T-B合金铸片的厚度为0.15~0.5mm。
更佳地,所述铸造得到的R-T-B合金铸片的厚度为0.2~0.35mm,例如为0.25mm。
本发明中,所述氢破的操作和条件可为本领域常规。一般情况下,所述氢破包括氢吸附过程和脱氢过程,可将所述R-T-B合金铸片进行氢破处理,获得R-T-B合金粉体。
较佳地,所述氢破的吸氢温度为20~300℃,例如为25℃。
较佳地,所述氢破的吸氢压力为0.12~0.19MPa,例如为0.19MPa。
较佳地,所述氢破的脱氢时间为0.5~5h,例如为2h。
较佳地,所述氢破的脱氢温度为450~600℃,例如为550℃。
本发明中,所述气流磨的操作和条件可为本领域常规。较佳地,所述气流磨为将所述R-T-B合金粉体送入气流磨机进行气流磨继续破碎,得到细粉。
更佳地,所述气流磨的研磨压力为0.3~0.5MPa,例如为0.4MPa。
更佳地,所述细粉的中值粒径D50为3~5.5μm,例如为4μm。
本发明中,所述成型的操作和条件可为本领域常规。
较佳地,所述成型在1.8T以上的,例如为1.8T的磁场强度和氮气气氛保护下进行。
本发明中,所述烧结的操作和条件可为本领域常规。
较佳地,所述烧结分为四步:
(1)升高温度至150~300℃,保温时间为1~4h;
(2)升高温度至400~600℃,保温时间为1~4h;
(3)升高温度至800~900℃,保温时间为1~4h;
(4)升高温度至1000~1090℃,保温时间大于3h。
本发明一优选实施例中,由于Ti的微量添加,可抑制晶粒长大,可一定程度上的扩大烧结的温度范围。
本发明中,所述时效的操作和条件可为本领域常规。
较佳地,所述时效包含一级时效和二级时效。
更佳地,所述一级时效的温度为850℃~950℃,例如为900℃。
更佳地,所述二级时效温度为440℃~540℃,例如为480℃。
本发明一优选实施例中,由于Al的添加量较高,使得该成分下的磁体二级时效温度范围可为440℃~540℃,可100℃的波动空间,利于量产。
本发明还提供了一种R-T-B系烧结磁体,其由如前所述的制备方法制备得到。
本发明还提供了一种如前所述的R-T-B系烧结磁体在电机中作为电机转子磁钢的应用。
在符合本领域常识的基础上,上述各优选条件,可任意组合,即得本发明各较佳实例。
本发明所用试剂和原料均市售可得。
本发明的积极进步效果在于:
本发明通过采用低B技术,在不添加或少量添加重稀土(重稀土RH添加量≤1)的情况下,对成分中的Ti、Ga、Al、Cu和Co的比列调整,其协同作用以及时效过程中形成高Cu低Al的晶界相Rx-(Cua-Gab-Alc)y,调节了晶界相的结构,大幅提升了矫顽力和剩磁。
附图说明
图1为实施例1的R-T-B系烧结磁体的EPMA图谱。
具体实施方式
下面通过实施例的方式进一步说明本发明,但并不因此将本发明限制在所述的实施例范围之中。下列实施例中未注明具体条件的实验方法,按照常规方法和条件,或按照商品说明书选择。
各实施例1~5和对比例6~12中的R-T-B系烧结磁体中的元素质量百分比和磁性能如下表1所示。
表1 R-T-B系烧结磁体中的元素质量百分比和磁性能
Figure BDA0002358970980000071
Figure BDA0002358970980000081
实施例1
R-T-B系烧结磁体制备方法如下:
(1)熔炼:按表1所示的各实施例和对比例的元素质量百分比,配置满足该元素质量百分比的原料配方。
将原料于高频真空熔炼炉中进行熔炼,熔炼炉的真空度小于0.02Pa,熔炼的温度为1500~1550℃。
(2)铸造:在Ar中进行,得到R-T-B合金铸片。
铸造的气氛压力为30~50kPa,铸造的铜辊转速为1m/s。
铸造得到的R-T-B合金铸片的厚度为0.25mm。
(3)氢破:R-T-B合金铸片的氢吸附过程的吸氢温度为25℃;吸氢压力为0.19MPa。
氢破的脱氢时间为2h。脱氢温度为550℃,获得R-T-B合金粉体。
(3)气流磨:将所述R-T-B合金粉体送入气流磨机进行气流磨继续破碎,得到细粉。
气流磨的研磨压力为0.4MPa。
得到的细粉的中值粒径D50为4μm。
(4)成型:细粉在一定磁场强度下经取向成型得到压坯。
成型在1.8T的磁场强度和氮气气氛保护下进行。
(5)烧结,分为四步(本批次样品量为10公斤):
①升高温度至150~300℃,保温时间为2h;
②升高温度至400~600℃,保温时间为2h;
③升高温度至800~900℃,保温时间为4h;
④升高温度至1000~1090℃,保温时间为5h。
(6)时效
一级时效的温度为900℃;二级时效的温度为480℃。
实施例2~5和对比例6~12制备工艺除选用的原料配方不同以外,制备工艺中的参数与实施例1的制备工艺相同。
效果实施例1
图1为实施例1的EPMA微观分析结果。
实施例1~5和对比例8中的R-T-B系烧结磁体的微观分析结果如表2所示。
表2 R-T-B系烧结磁体的微观分析结果
Figure BDA0002358970980000091
Figure BDA0002358970980000101

Claims (11)

1.一种R-T-B系烧结磁体,其特征在于,其包含:R、B、Ti、Ga、Al、Cu和T,其含量如下:
R的含量为29.0~33%;
所述R中,RH的含量为0或不大于1%;
B的含量为0.86~0.93%;
Ti的含量为0.05~0.25%;
Ga的含量为0.3~0.5%,但不为0.5%;
Al的含量为0.6~1%,但不为0.6%;
Cu的含量为0.36~0.55%;
其中,R为至少含有Nd的稀土元素,B为硼,Ti为钛,Ga为镓,Al为铝,Cu为铜,T包含Fe和Co;所述百分比为质量百分比;
所述Fe和Co的含量为占100%质量百分比的余量;
所述R-T-B系烧结磁体中C、N和O的含量总和为1000ppm~3500ppm;
所述R-T-B系烧结磁体包含主相和晶界相;其中,所述主相包含R2T14B,所述晶界相包含Rx-(Cua-Gab-Alc)y和稀土氧化相;
其中,x/y=1.5~3;a/b=2~5;(a+b)/c=30~70;
所述主相的含量为94~98%;所述Rx-(Cua-Gab-Alc)y的含量为1~3.5%;所述稀土氧化相的含量为1~2.5%,所述百分比为体积百分比。
2.如权利要求1所述的R-T-B系烧结磁体,其特征在于,所述晶界相Rx-(Cua-Gab-Alc)y中,x/y=1.5~3,a:b:c=(10~40):(6~19):1。
3.如权利要求1所述的R-T-B系烧结磁体,其特征在于,所述R的含量为30.2~33%;
和/或,所述R中,RH的含量为0%、0.5%;
和/或,所述B的含量为0.915~0.93%;
和/或,所述Ti的含量为0.15~0.25%;
和/或,所述Ga的含量为0.3~0.455%;
和/或,所述Al的含量为0.65~1%,但不为1%;
和/或,所述Cu的含量为0.45~0.55%;
和/或,所述Co的含量为0.5~3%;
和/或,所述Fe的含量为60~68%;
所述百分比为质量百分比。
4.如权利要求3所述的R-T-B系烧结磁体,其特征在于,所述R的含量为30.2%、31.5%、33%;
和/或,所述B的含量为为0.915%、0.92%、0.93%;
和/或,所述Ti的含量为0.15%、0.2%、0.25%;
和/或,所述Ga的含量为0.3%、0.4%、0.455%;
和/或,所述Al的含量为0.65%、0.7%、0.8%、0.9%;
和/或,所述Cu的含量为0.45%、0.5%、0.55%;
和/或,所述Co的含量为0.5%、1.5%、3.0%;
所述百分比为质量百分比。
5.如权利要求1所述的R-T-B系烧结磁体,其特征在于,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,B的含量为0.92%,Co的含量为0.5%;Al的含量为0.9%,Cu的含量为0.45%,Ga的含量为0.455%,Ti的含量为0.2%,Fe为余量;所述百分比为质量百分比;
或者,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,B的含量为0.92%,Co的含量为0.5%;Al的含量为1.0%,Cu的含量为0.5%,Ga的含量为0.455%,Ti的含量为0.2%,Fe为余量;所述百分比为质量百分比;
或者,所述R-T-B系烧结磁体,其包含:Nd的含量为31.5%,Dy的含量为0.5%;B的含量为0.915%,Co的含量为0.5%;Al的含量为0.7%,Cu的含量为0.55%,Ga的含量为0.455%,Ti的含量为0.25%,Fe为余量;所述百分比为质量百分比;
或者,所述R-T-B系烧结磁体,其包含:Nd的含量为30.2%,B的含量为0.93%,Co的含量为1.5%;Al的含量为0.65%,Cu的含量为0.4%,Ga的含量为0.3%,Ti的含量为0.15%,Fe为余量;所述百分比为质量百分比;
或者,所述R-T-B系烧结磁体,其包含:Nd的含量为33%,B的含量为0.86%,Co的含量为3.0%;Al的含量为0.8%,Cu的含量为0.36%,Ga的含量为0.4%,Ti的含量为0.05%,Fe为余量;所述百分比为质量百分比。
6.一种如权利要求1~5任一项所述的R-T-B系烧结磁体的制备方法,其特征在于,其步骤包括:将R-T-B系烧结磁体的原料依次进行熔炼、铸造、氢破、气流磨、成型、烧结和时效,即可。
7.如权利要求6所述的制备方法,其特征在于,所述熔炼为在高频真空熔炼炉中进行;
和/或,所述熔炼的温度为1450~1550℃;
和/或,所述铸造在Ar气氛条件下进行;
和/或,所述铸造的气氛压力为20~70kPa;
和/或,所述铸造的铜辊转速为0.4~2m/s;
和/或,所述铸造得到的R-T-B合金铸片的厚度为0.15~0.5mm;
和/或,所述氢破的吸氢温度为20~300℃;
和/或,所述氢破的吸氢压力为0.12~0.19MPa;
和/或,所述氢破的脱氢时间为0.5~5h;
和/或,所述氢破的脱氢温度为450~600℃;
和/或,所述气流磨为将所述R-T-B合金粉体送入气流磨机进行气流磨继续破碎,得到细粉;
和/或,所述成型在1.8T以上的磁场强度和氮气气氛保护下进行;
和/或,所述烧结分为四步:(1)升高温度至150~300℃,保温时间为1~4h;(2)升高温度至400~600℃,保温时间为1~4h;(3)升高温度至800~900℃,保温时间为1~4h;(4)升高温度至1000~1090℃,保温时间大于3h;
所述时效包含一级时效和二级时效。
8.如权利要求7所述的制备方法,其特征在于,
所述熔炼炉的真空度小于0.1Pa;
和/或,所述熔炼的温度为1500~1550℃;
和/或,所述铸造的气氛压力为30~50kPa;
和/或,所述铸造的铜辊转速为1m/s;
和/或,所述铸造得到的R-T-B合金铸片的厚度为0.2~0.35mm;
和/或,所述氢破的吸氢温度为25℃;
和/或,所述氢破的吸氢压力为0.19MPa;
和/或,所述氢破的脱氢时间为2h;
和/或,所述氢破的脱氢温度为550℃;
和/或,所述细粉的中值粒径D50为3~5.5μm;
和/或,所述气流磨的研磨压力为0.3~0.5Mpa;
和/或,所述成型在1.8T的磁场强度和氮气气氛保护下进行;
和/或,所述一级时效的温度为850℃~950℃;
和/或,所述二级时效温度为440℃~540℃。
9.如权利要求8所述的制备方法,其特征在于,
所述熔炼炉的真空度小于0.02Pa;
和/或,所述铸造得到的R-T-B合金铸片的厚度为0.25mm;
和/或,所述细粉的中值粒径D50为4μm;
和/或,所述气流磨的研磨压力为0.4Mpa;
和/或,所述一级时效的温度为900℃;
和/或,所述二级时效的温度为480℃。
10.一种R-T-B系烧结磁体,其特征在于,其由如权利要求6~9任一项所述的制备方法制备得到。
11.一种如权利要求1~5任一项所述的R-T-B系烧结磁体在电机中作为电机转子磁钢的应用。
CN202010016222.8A 2019-12-31 2020-01-08 R-t-b系烧结磁体及其制备方法 Active CN111081444B (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US17/784,996 US20230021772A1 (en) 2019-12-31 2020-07-07 R-t-b-based sintered magnet and preparation method therefor
EP20909158.6A EP4086924A4 (en) 2019-12-31 2020-07-07 SINTERED MAGNET BASED ON R-T-B AND PREPARATION METHOD THEREFOR
JP2022539202A JP7312916B2 (ja) 2019-12-31 2020-07-07 R-t-b系焼結磁石及びその製造方法
PCT/CN2020/100575 WO2021135143A1 (zh) 2019-12-31 2020-07-07 R-t-b系烧结磁体及其制备方法
TW109145204A TWI738592B (zh) 2019-12-31 2020-12-21 R-t-b系燒結磁體及其製備方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2019114239523 2019-12-31
CN201911423952 2019-12-31

Publications (2)

Publication Number Publication Date
CN111081444A CN111081444A (zh) 2020-04-28
CN111081444B true CN111081444B (zh) 2021-11-26

Family

ID=70322737

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010016222.8A Active CN111081444B (zh) 2019-12-31 2020-01-08 R-t-b系烧结磁体及其制备方法

Country Status (6)

Country Link
US (1) US20230021772A1 (zh)
EP (1) EP4086924A4 (zh)
JP (1) JP7312916B2 (zh)
CN (1) CN111081444B (zh)
TW (1) TWI738592B (zh)
WO (1) WO2021135143A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111081444B (zh) * 2019-12-31 2021-11-26 厦门钨业股份有限公司 R-t-b系烧结磁体及其制备方法
CN111180159B (zh) * 2019-12-31 2021-12-17 厦门钨业股份有限公司 一种钕铁硼永磁材料、制备方法、应用
CN113241231A (zh) * 2021-04-30 2021-08-10 江西金力永磁科技股份有限公司 一种含钛烧结钕铁硼磁体及其制备方法
CN114373593B (zh) * 2022-03-18 2022-07-05 宁波科宁达工业有限公司 一种r-t-b磁体及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101981634A (zh) * 2008-03-31 2011-02-23 日立金属株式会社 R-t-b系烧结磁体及其制造方法
CN106158204A (zh) * 2016-06-16 2016-11-23 宁波雄海稀土速凝技术有限公司 一种钕铁硼永磁材料及其制备方法
JP2017045828A (ja) * 2015-08-26 2017-03-02 日立金属株式会社 R−t−b系焼結磁石
CN108597707A (zh) * 2018-04-08 2018-09-28 天津三环乐喜新材料有限公司 一种含Ce烧结磁体及制备方法
CN110444360A (zh) * 2019-07-19 2019-11-12 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备方法
CN110473682A (zh) * 2019-07-19 2019-11-19 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备工艺

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4318204B2 (ja) 2003-05-12 2009-08-19 昭和電工株式会社 希土類含有合金薄片の製造方法、希土類磁石用合金薄片、希土類焼結磁石用合金粉末、希土類焼結磁石、ボンド磁石用合金粉末、及びボンド磁石
EP1675133B1 (en) * 2004-12-27 2013-03-27 Shin-Etsu Chemical Co., Ltd. Nd-Fe-B rare earth permanent magnet material
CN101256859B (zh) 2007-04-16 2011-01-26 有研稀土新材料股份有限公司 一种稀土合金铸片及其制备方法
JP5115511B2 (ja) 2008-03-28 2013-01-09 Tdk株式会社 希土類磁石
JP2011258935A (ja) 2010-05-14 2011-12-22 Shin Etsu Chem Co Ltd R−t−b系希土類焼結磁石
WO2015129861A1 (ja) * 2014-02-28 2015-09-03 日立金属株式会社 R-t-b系焼結磁石およびその製造方法
CN103996475B (zh) 2014-05-11 2016-05-25 沈阳中北通磁科技股份有限公司 一种具有复合主相的高性能钕铁硼稀土永磁体及制造方法
CN105321647B (zh) 2014-07-30 2018-02-23 厦门钨业股份有限公司 稀土磁铁用急冷合金和稀土磁铁的制备方法
JP6489201B2 (ja) * 2015-02-18 2019-03-27 日立金属株式会社 R−t−b系焼結磁石の製造方法
CN106160849B (zh) 2015-04-15 2018-12-28 富士通株式会社 功率估计装置、频谱特征监测装置和光接收机
US10923256B2 (en) * 2015-06-25 2021-02-16 Hitachi Metals, Ltd. R-T-B-based sintered magnet and method for producing same
JP6493138B2 (ja) 2015-10-07 2019-04-03 Tdk株式会社 R−t−b系焼結磁石
US11557411B2 (en) 2016-01-28 2023-01-17 Noveon Magnetics Inc. Grain boundary engineering of sintered magnetic alloys and the compositions derived therefrom
US10943717B2 (en) * 2016-02-26 2021-03-09 Tdk Corporation R-T-B based permanent magnet
JP6541038B2 (ja) 2016-03-28 2019-07-10 日立金属株式会社 R−t−b系焼結磁石
CN106128673B (zh) 2016-06-22 2018-03-30 烟台首钢磁性材料股份有限公司 一种烧结钕铁硼磁体及其制备方法
CN110619984B (zh) 2018-06-19 2021-12-07 厦门钨业股份有限公司 一种低B含量的R-Fe-B系烧结磁铁及其制备方法
JP7314513B2 (ja) 2018-07-09 2023-07-26 大同特殊鋼株式会社 RFeB系焼結磁石
CN108831657B (zh) * 2018-08-16 2023-10-24 烟台首钢磁性材料股份有限公司 一种提高烧结钕铁硼磁体性能的方法和专用装置
CN111081444B (zh) * 2019-12-31 2021-11-26 厦门钨业股份有限公司 R-t-b系烧结磁体及其制备方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101981634A (zh) * 2008-03-31 2011-02-23 日立金属株式会社 R-t-b系烧结磁体及其制造方法
JP2017045828A (ja) * 2015-08-26 2017-03-02 日立金属株式会社 R−t−b系焼結磁石
CN106158204A (zh) * 2016-06-16 2016-11-23 宁波雄海稀土速凝技术有限公司 一种钕铁硼永磁材料及其制备方法
CN108597707A (zh) * 2018-04-08 2018-09-28 天津三环乐喜新材料有限公司 一种含Ce烧结磁体及制备方法
CN110444360A (zh) * 2019-07-19 2019-11-12 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备方法
CN110473682A (zh) * 2019-07-19 2019-11-19 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备工艺

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Aru Yan,et al.Characterization of microstructure and coercivity of NdÐFeÐB magnets with Ti and Al or Cu addition.《Journal of Magnetism and Magnetic Materials》.1998,第185卷 *
添加Ti对烧结NdFeB磁体微观组织和性能的影响;俞珺等;《稀有金属与硬质合金》;20171231;第45卷(第6期);44-47 *

Also Published As

Publication number Publication date
EP4086924A4 (en) 2024-04-03
WO2021135143A1 (zh) 2021-07-08
TW202126832A (zh) 2021-07-16
JP7312916B2 (ja) 2023-07-21
US20230021772A1 (en) 2023-01-26
EP4086924A1 (en) 2022-11-09
TWI738592B (zh) 2021-09-01
JP2023504931A (ja) 2023-02-07
CN111081444A (zh) 2020-04-28

Similar Documents

Publication Publication Date Title
CN111081444B (zh) R-t-b系烧结磁体及其制备方法
JP7214041B2 (ja) 高Cu高Alネオジム鉄ホウ素磁石及びその製造方法
JP7470804B2 (ja) ネオジム鉄ホウ素磁石材料、原料組成物、及び製造方法
TWI770730B (zh) 釹鐵硼永磁材料、製備方法、應用
CN111223627B (zh) 钕铁硼磁体材料、原料组合物、制备方法、应用
TWI751843B (zh) R-t-b系永磁材料及其製備方法和應用
TWI569291B (zh) Neodymium rare earth permanent magnet and its manufacturing method
JP2015023285A (ja) R−t−m−b系焼結磁石とその製造方法
CN109859922B (zh) 一种低重稀土含量的R-Fe-B类磁体的制备方法
CN111383808B (zh) 高剩磁高矫顽力钕铁硼磁体的制备方法
WO2021031724A1 (zh) 一种钕铁硼永磁材料及其原料组合物、制备方法和应用
CN111261355B (zh) 钕铁硼磁体材料、原料组合物、制备方法、应用
TW202305841A (zh) 一種釹鐵硼磁體材料及其製備方法和應用
CN110648813A (zh) 一种r-t-b系永磁材料、原料组合物、制备方法、应用
TW202305842A (zh) 一種釹鐵硼磁體材料及其製備方法和應用
TWI806462B (zh) 一種r-t-b磁體及其製備方法
CN113205939B (zh) 一种含锆烧结钕铁硼磁体及其制备方法
CN112735717B (zh) 一种钕铁硼材料及其制备方法
CN111261356B (zh) 一种r-t-b系永磁材料及其制备方法和应用
EP2721618A1 (en) Neodymium/iron/boron-based permanent magnet
CN113012925B (zh) 一种高磁性低稀土含量的钕铁硼磁体的制备方法
CN112768168B (zh) 一种钕铁硼材料及其制备方法
WO2023207021A1 (zh) 钕铁硼磁体材料及其制备方法、应用、电机
CN114974777A (zh) 一种钕铁硼磁体及其制备方法
CN117995545A (zh) 一种钕铁硼磁体的制备方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20220629

Address after: 366300 new industrial zone, Changting Economic Development Zone, Longyan City, Fujian Province

Patentee after: FUJIAN CHANGTING GOLDEN DRAGON RARE-EARTH Co.,Ltd.

Address before: 361000 Ke Gang, Haicang District, Fujian, Xiamen

Patentee before: XIAMEN TUNGSTEN Co.,Ltd.

Patentee before: FUJIAN CHANGTING GOLDEN DRAGON RARE-EARTH Co.,Ltd.

TR01 Transfer of patent right
CP01 Change in the name or title of a patent holder

Address after: 366300 new industrial zone, Changting Economic Development Zone, Longyan City, Fujian Province

Patentee after: Fujian Jinlong Rare Earth Co.,Ltd.

Address before: 366300 new industrial zone, Changting Economic Development Zone, Longyan City, Fujian Province

Patentee before: FUJIAN CHANGTING GOLDEN DRAGON RARE-EARTH Co.,Ltd.

CP01 Change in the name or title of a patent holder