JPH024940A - Hard magnetic material and production thereof - Google Patents
Hard magnetic material and production thereofInfo
- Publication number
- JPH024940A JPH024940A JP63308974A JP30897488A JPH024940A JP H024940 A JPH024940 A JP H024940A JP 63308974 A JP63308974 A JP 63308974A JP 30897488 A JP30897488 A JP 30897488A JP H024940 A JPH024940 A JP H024940A
- Authority
- JP
- Japan
- Prior art keywords
- hard magnetic
- magnetic material
- iron
- carbon
- neodymium
- 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.)
- Pending
Links
- 239000000696 magnetic material Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 18
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 14
- 238000001953 recrystallisation Methods 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 13
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets 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
- H01F1/04—Magnets 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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/058—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
Abstract
Description
【発明の詳細な説明】
本発明はネオジム、鉄および炭素からなる硬質磁性材料
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hard magnetic material consisting of neodymium, iron and carbon.
このタイプの既知材料としては正方晶系構造を有するＮ
ｄｚＦｅ＋Ｊがある。この化合物において、ＢをＣで置
換することによって異方性を高めることは知られている
（例えば、ｒＪｏｕｒｎａｌ ｄｅ Ｐｈｙｓｉｑｕｅ
Ｃｏｌｌｏｑｕｅ Ｃ６」増販Ｎｏ、９（１９８５年９
月）、ページＣ６３０５／３０８ ：題目［炭素ドープ
ドＮｄｚＦｅ＋Ｊの磁気異方性」ボルゾニー、レカビュ
ー、パレティおよびサンチェズ氏による）。この文献の
第３０６ページには、化合物ＮｄｚＦｅＩ４Ｂにおいて
バリウムを炭素で完全に置換した場合に、正方晶系相を
得ることができないことが報告されている。また、この
事についてはｒｓｏｌｉｄ ５ｔａｔｅ Ｃｏｍｍｕｎ
ｉｃａｔｉｏｎｓＪＶｏｌ、６４゜Ｎｏ、５．６３９〜
６４４ページ（１９８７）に記載されている。Known materials of this type include N, which has a tetragonal structure;
There is dzFe+J. In this compound, it is known to increase the anisotropy by replacing B with C (for example, in rJournal de Physique
Colloque C6” increased sales No. 9 (September 1985
), page C6305/308: Title [Magnetic anisotropy of carbon-doped NdzFe+J] by Bolzony, Recabu, Paletti and Sanchez). On page 306 of this document, it is reported that when carbon is completely substituted for barium in the compound NdzFeI4B, a tetragonal phase cannot be obtained. Also, regarding this matter, see rsolid 5tate Common
cationsJVol, 64°No, 5.639~
It is described on page 644 (1987).
この文献の６４０ページの題目「三元炭化物の合成およ
び磁性」には、他の材料Ｒ−ネオジムにおける正方晶系
構造が再結晶化アニールによっては確認されていないこ
とが報告されている。On page 640 of this document, entitled "Synthesis and Magnetism of Ternary Carbides", it is reported that the tetragonal structure in other materials R-neodymium has not been confirmed by recrystallization annealing.
本発明の目的は、ホウ素の代りに炭素だけおよび比較的
高い含有量のネオジムからなる高い結晶異方性を有する
硬質磁性材料を提供することである。The object of the invention is to provide a hard magnetic material with high crystalline anisotropy consisting only of carbon and a relatively high content of neodymium instead of boron.
本発明の硬質磁性材料は正方品系構造を有し、かつ化学
量論的組成ＮｄｚＦｅ１４Ｃから逸脱しないかまたはほ
とんど逸脱しない組成を有する再結晶化アニール注型材
料（ｒｅｃｒｙｓｔａｌｌｉｚａｔｉｏｎ ａｎｎｅａ
ｌｅｄｃａｓｔｍａｔｅｒｉａｌ）からなることを特徴
とする。この組成において、ＦｅをＣＯで全組成に対し
て計算して最大で６原子％まで置換するこ七ができる。The hard magnetic material of the present invention has a tetragonal structure and is a recrystallization annealed casting material having a composition that does not deviate or hardly deviate from the stoichiometric composition NdzFe14C.
It is characterized by being made of ledcast material). In this composition, it is possible to replace Fe with CO up to a maximum of 6 atomic % calculated based on the total composition.
６原子％以上のＦｅをＣｏで置換する場合には、アニー
ル処理において得ることのできる正方品系構造を有する
硬質磁性材料の量が有意に減少する。When replacing 6 atomic % or more of Fe with Co, the amount of hard magnetic material with a tetragonal structure that can be obtained in the annealing process is significantly reduced.
本発明の硬質磁性材料は次のようにして作ることができ
る：出発材料ネオジム、鉄、（必要に応じて）コバルト
および炭素を実質的に化学量論的割合で、好ましくはア
ルゴンのような不活性ガス雰囲気下で融解する。融成物
を型に注入する。材料はＮｄｚＦｅ＋ｗ構造を有するが
、硬質磁性でなく、炭素が格子に溶解している。格子中
の炭素は１または２個以上の鉄原子を置換することがで
きる。The hard magnetic material of the invention can be made as follows: starting materials neodymium, iron, (optionally) cobalt and carbon in substantially stoichiometric proportions, preferably with an impurity such as argon. Melts under active gas atmosphere. Pour the melt into a mold. Although the material has a NdzFe+w structure, it is not hard magnetic and carbon is dissolved in the lattice. Carbon in the lattice can replace one or more iron atoms.
構造は斜方晶系である。必要に応じて、得られた注型体
（Ｃａｓｔｉｎｇ）を９００℃またはこれより高い温度
で均質にアニールすることができる。材料がネオジム、
鉄および炭素のみからなる場合には、８４０〜８９０℃
の範囲の温度でアニールし、このために再結晶化が生ず
る。再結晶化はこの温度の範囲内で生じ、これによって
正方品系Ｎｄ２Ｆｅ１４Ｇ相が形成する。驚くべきこと
に、出発材料を秤量する際に、相当するホウ素化合物の
場合に要求されるように、化学量論的組成から明らかに
逸脱することは望ましくないことを確めた。しかしなが
ら、化学量論的組成に関してネオジムおよび／または炭
素の量を２０％以下に、および鉄の量を１５％で僅かに
逸脱させることは許容できることを確めた。正方晶系相
は指示温度範囲（８９０℃以上）外では形成しなく、ま
たこの相が形成するとしても、主としてＮｄｚＦｅ＋ｑ
構造を有する第２相が正方晶系相（８４０℃以下）のほ
かに残留する。アニールを指示温度範囲で行う場合には
、正方晶系相が主として形成する。最適な磁性を有する
実質的単一相材料は、アニールを８５０〜８８０℃の範
囲の温度、好ましくば８７０℃で行う場合に得ることが
できる。また、材料がＧ。The structure is orthorhombic. If desired, the resulting casting can be homogeneously annealed at a temperature of 900° C. or higher. The material is neodymium,
When consisting only of iron and carbon, 840-890°C
annealing at a temperature in the range of , which causes recrystallization. Recrystallization occurs within this temperature range, thereby forming a tetragonal Nd2Fe14G phase. Surprisingly, it was found that when weighing the starting materials, it was not desirable to deviate significantly from the stoichiometric composition, as required in the case of the corresponding boron compounds. However, it has been determined that slight deviations with respect to the stoichiometry in the amount of neodymium and/or carbon up to 20% and the amount of iron at 15% are acceptable. The tetragonal phase does not form outside the indicated temperature range (above 890°C), and even if this phase does form, it is mainly due to NdzFe+q
A second phase having a structure remains in addition to the tetragonal phase (840° C. or lower). When annealing is carried out in the indicated temperature range, the tetragonal phase is predominantly formed. Substantially single-phase materials with optimal magnetic properties can be obtained if the annealing is carried out at a temperature in the range of 850-880<0>C, preferably 870<0>C. Also, the material is G.
を含む場合には、再結晶化を生ずるアニール プロセス
は約８５０℃の温度で行うのが好ましい。コバルトは、
硬質磁性材料のキューリー温度を著しく高くするから、
ある用途には望ましいことを確めた。本発明によるＣｏ
含有硬質磁性材料の製造において、個々の元素を秤量す
る際に、化学量論的組成からの僅かな逸脱は必要としな
いが、しかし僅か程度の逸脱は許容することができる。, the annealing process that causes recrystallization is preferably carried out at a temperature of about 850°C. Cobalt is
Because it significantly increases the Curie temperature of hard magnetic materials,
It has been confirmed that it is desirable for certain uses. Co according to the present invention
When weighing the individual elements in the production of the hard magnetic material containing it, small deviations from the stoichiometric composition are not required, but small deviations can be tolerated.
ネオジムおよび／または炭素の量における２０％の逸脱
および鉄および／またはコバルトの量における１５％の
逸脱は許容される。また、本発明を実施する実験をネオ
ジムの代りにプラセオジムを用いて行った所、正方品系
構造を有する実質的単一相材籾を得ることかできないこ
とを確めた。A deviation of 20% in the amount of neodymium and/or carbon and a deviation of 15% in the amount of iron and/or cobalt is allowed. Furthermore, when experiments were carried out to implement the present invention using praseodymium instead of neodymium, it was confirmed that it was only possible to obtain substantially single-phase rice having a tetragonal structure.
次に、本発明を実施例に基づいて説明する。Next, the present invention will be explained based on examples.
実１１」１
上述するように、全組成Ｎｄ２Ｆｅ、４Ｃを有する注型
体を作った。注型後、材料はＮｄ２Ｐｅ＋ｖ構造（斜方
晶系）を有していた。前均質化アニールをしないで、得
られた注型体を８７０℃で５００時間にわたって直接に
再結晶化アニールを行った。材料は単一相であり、正方
晶系構造を有していた。次いで、格子定数を測定した。Example 11''1 As described above, a cast body having the total composition of Nd2Fe and 4C was made. After casting, the material had a Nd2Pe+v structure (orthorhombic). The obtained cast body was directly subjected to recrystallization annealing at 870° C. for 500 hours without pre-homogenization annealing. The material was single phase and had a tetragonal structure. Then, the lattice constant was measured.
Ａ＝８．８１４人およびＣ＝１２．０１５人であること
を確めた。本発明の材料は５３５にのキューリー温度を
有していた。２０“Ｃでの飽和磁化はＣ＝ １３０１Ｅ
ＭＵ／ｇであった。正方品系構造を有する単一相材料は
、全組成Ｎｄ＋ｚ、 ＋Ｐｅｅ＋、 ８ｃｂおよびＮｄ
＋＋、ａＦｅ［ｌ＋、 ＩＣ７，１を有する材料を用い
、同様にして得た。It was confirmed that A=8.814 people and C=12.015 people. The material of the invention had a Curie temperature of 535. The saturation magnetization at 20"C is C = 1301E
It was MU/g. A single phase material with a tetragonal structure has a total composition of Nd+z, +Pee+, 8cb and Nd
++, aFe[l+, IC7,1 was used and obtained in the same manner.
磁石は、材料を所望の形状に直接注型して作った。注型
および再結晶化アニール後、材料を粉砕し、次いで磁界
において所望の形状に焼結し、または合成樹脂と混合し
、所望形状に加圧した。The magnets were made by directly casting the material into the desired shape. After casting and recrystallization annealing, the material was ground and then sintered in a magnetic field to the desired shape or mixed with synthetic resin and pressed into the desired shape.
この材料において、鉄の１部を他の３ｄ金属および／ま
たはアルミニウム、ガリウム、シリコンなどで置換する
ことができる。ネオジムの１部を１または２種以上の希
土類金属で置換することができる。In this material, part of the iron can be replaced by other 3D metals and/or aluminum, gallium, silicon, etc. A portion of the neodymium can be replaced with one or more rare earth metals.
実謝ｌ朋り
組成が式ＮｄｚＦｅ＋ ３ＣｏＣに相当する注型体を作
った。A cast body having a composition corresponding to the formula NdzFe+3CoC was prepared.
次いで、この注型体を、予め均質化アニールすることな
く８５０℃で１５０時間にわたって再結晶化アニール
プロセスを直接に行った。かようにして得られた材料は
実質的に単一相であり、正方品系構造を有していた。材
料は６２０ Ｋのキューリー温度を有していた。Next, this cast body was subjected to recrystallization annealing at 850° C. for 150 hours without homogenization annealing in advance.
I went through the process directly. The material thus obtained was substantially single-phase and had a tetragonal structure. The material had a Curie temperature of 620 K.
特許出願人 エヌ・ベー・フィリップス・フルーイラ
ンペンファブリケン
代理人弁理士 杉 村 暁 査問Patent applicant N.B.Philips Fluiranpenfabriken Patent attorney Akira Sugimura Interviewer
Claims (9)
Ｆｅ＿１＿４Ｃから逸脱しないか、またはほとんど逸脱
しない組成を有する再結晶化アニール注型材料からなる
ことを特徴とする希土類金属、鉄および炭素からなる硬
質磁性材料。1. Has a tetragonal structure and has a stoichiometric composition Nd_2
Hard magnetic material consisting of rare earth metals, iron and carbon, characterized in that it consists of a recrystallized annealed casting material with a composition that does not deviate or hardly deviates from Fe_1_4C.
るＦｅの最大で６原子％をＣｏで置換した請求項１記載
の硬質磁性材料。2. 2. A hard magnetic material according to claim 1, wherein at most 6 at.% of the Fe present in the hard magnetic material is replaced by Co, calculated on the total composition.
の組成逸脱を２０％を超えないようにし、および鉄に対
しての逸脱を１５％を超えないようにした請求項１記載
の硬質磁性材料。3. 2. A hard magnetic material according to claim 1, having a compositional deviation of not more than 20% from the stoichiometric composition for neodymium and carbon and not more than 15% for iron.
逸脱を２０％を超えないようにし、および鉄およびコバ
ルトに対して、逸脱を１５％を超えないようにした請求
項３記載の硬質磁性材料。4. Hard magnetic material according to claim 3, characterized in that for Nd and C the compositional deviation from the stoichiometric composition does not exceed 20% and for iron and cobalt the deviation does not exceed 15%. material.
５Åにした請求項３記載の硬質磁性材料。5. The lattice constants are A=8.814 Å and C=12.01
The hard magnetic material according to claim 3, having a thickness of 5 Å.
的割合Ｎｄ＿２Ｆｅ＿１＿４Ｃから僅かに逸脱する量で
融解し、型に注入し、しかる後に注型体を８４０〜８９
０℃の範囲の温度で再結晶化アニールすることを特徴と
するネオジム、鉄および炭素からなる硬質磁性材料の製
造方法。6. The starting materials neodymium, iron and carbon are melted together in amounts slightly deviating from the stoichiometric proportion Nd_2Fe_1_4C and poured into a mold, after which the cast body is 840-89
A method for producing a hard magnetic material consisting of neodymium, iron and carbon, characterized by recrystallization annealing at a temperature in the range of 0°C.
る請求項６記載の方法。7. 7. The method of claim 6, wherein the material is annealed at a temperature in the range of 850-880<0>C.
、化学量論的割合Ｎｄ＿２Ｆｅ＿１＿４＿−＿ｘＣｏ＿
ｘＣ（ここにｘ＜１．０２）から僅かに逸脱する量で融
解し、型に注入し、しかる後に注型体を約８５０℃の範
囲の温度で再結晶化アニールすることを特徴とするネオ
ジム、鉄、コバルトおよび炭素からなる硬質磁性材料の
製造方法。8. Starting materials neodymium, iron, cobalt and carbon together in stoichiometric proportions Nd_2Fe_1_4_−_xCo_
Neodymium, characterized in that it is melted in an amount slightly deviating from xC (where x<1.02), poured into a mold, and the cast body is then recrystallized annealed at a temperature in the range of about 850°C. , a method for producing a hard magnetic material consisting of iron, cobalt and carbon.
性材料および／または請求項６〜８のいずれか一つの項
に記載する方法で得た磁性注型体からなる磁性注型体。9. A magnetic cast body made of a hard magnetic material according to any one of claims 1 to 5 and/or a magnetic cast body obtained by the method according to any one of claims 6 to 8.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8702991 | 1987-12-11 | ||
| NL8702991A NL8702991A (en) | 1987-12-11 | 1987-12-11 | Boron-free hard magnetic material comprising a tetragonal phase - by annealing castings of an alloy contg. neodymium, iron and carbon and having a specific stoichiometric compsns. |
| NL8800740 | 1988-03-24 | ||
| NL8800740A NL8800740A (en) | 1987-12-11 | 1988-03-24 | HARD-MAGNETIC MATERIAL FROM A RARE NATURAL METAL, IRON AND CARBON. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH024940A true JPH024940A (en) | 1990-01-09 |
Family
ID=26646321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63308974A Pending JPH024940A (en) | 1987-12-11 | 1988-12-08 | Hard magnetic material and production thereof |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0320064A1 (en) |
| JP (1) | JPH024940A (en) |
| KR (1) | KR890010944A (en) |
| CN (1) | CN1033494A (en) |
| NL (1) | NL8800740A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8901168A (en) * | 1989-05-10 | 1990-12-03 | Philips Nv | HARD-MAGNETIC MATERIAL AND MAGNET MADE FROM THIS HARD-MAGNETIC MATERIAL. |
| DE3928389A1 (en) * | 1989-08-28 | 1991-03-14 | Schramberg Magnetfab | PERMANENT MAGNET |
| US5300156A (en) * | 1990-07-24 | 1994-04-05 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Bonded rare earth magnet and a process for manufacturing the same |
| CA2047592C (en) * | 1990-07-24 | 1996-10-15 | Fumihito Mohri | Bonded rare earth magnet and a process for manufacturing the same |
| US5240627A (en) * | 1990-07-24 | 1993-08-31 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Bonded rare earth magnet and a process for manufacturing the same |
| US5478411A (en) * | 1990-12-21 | 1995-12-26 | Provost, Fellows And Scholars Of The College Of The Holy And Undivided Trinity Of Queen Elizabeth Near Dublin | Magnetic materials and processes for their production |
| DE4242839A1 (en) * | 1992-12-17 | 1994-06-23 | Siemens Ag | Mfr. of magnetic anisotropic power of rare earth based compound |
| DE4243048A1 (en) * | 1992-12-18 | 1994-06-23 | Siemens Ag | Manufacturing hard magnetic materials using Sm Fe C system |
| CN105603296A (en) * | 2015-12-23 | 2016-05-25 | 桂林电子科技大学 | Rare earth Fe-based electromagnetic shielding material and preparation method thereof |
-
1988
- 1988-03-24 NL NL8800740A patent/NL8800740A/en not_active Application Discontinuation
- 1988-12-05 EP EP88202784A patent/EP0320064A1/en not_active Withdrawn
- 1988-12-08 JP JP63308974A patent/JPH024940A/en active Pending
- 1988-12-08 KR KR1019880016298A patent/KR890010944A/en not_active Application Discontinuation
- 1988-12-08 CN CN88108583A patent/CN1033494A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR890010944A (en) | 1989-08-11 |
| EP0320064A1 (en) | 1989-06-14 |
| NL8800740A (en) | 1989-07-03 |
| CN1033494A (en) | 1989-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0521218A (en) | Production of rare-earth permanent magnet | |
| US3947295A (en) | Hard magnetic material | |
| JPWO2002103719A1 (en) | Rare earth permanent magnet material | |
| EP0506412B1 (en) | Magnetic material | |
| JPH024940A (en) | Hard magnetic material and production thereof | |
| JP2006183151A (en) | Method for producing magnetic material powder and method for producing bond magnet | |
| JPH01219143A (en) | Sintered permanent magnet material and its production | |
| WO2003003386A1 (en) | R-t-b-c based rare earth magnetic powder and bonded magnet | |
| JP2948223B2 (en) | High performance permanent magnet with excellent corrosion resistance and method of manufacturing the same | |
| JP2002531701A (en) | High performance rare earth transition metal magnetostrictive materials with increased impurities | |
| JPH06235051A (en) | Magnetic material | |
| JP3135665B2 (en) | Magnetic materials and bonded magnets | |
| GB2095699A (en) | Magnetic metallic glass alloy | |
| JP3151087B2 (en) | Method for producing raw material powder for R-Fe-B-based permanent magnet and alloy powder for adjusting raw material powder | |
| JP3312908B2 (en) | Iron-rare earth-nitrogen permanent magnet material | |
| JPH11340020A (en) | Magnet material, its manufacture, and bonded magnet using the same | |
| JPS6052556A (en) | Permanent magnet and its production | |
| JPH05267027A (en) | Manufacture of raw material powder for r-fe-b group permanent magnet and alloy powder for adjusting raw material powder | |
| JPS6052555A (en) | Permanent magnet material and its production | |
| JPH0526858B2 (en) | ||
| JP2643329B2 (en) | Rare earth-cobalt sintered magnet with excellent magnetic properties and mechanical strength | |
| JPH05500134A (en) | permanent magnet | |
| JPH06204016A (en) | Manufacture of rare earth intermetallic compound magnetic material composed of rare earth compound | |
| JPH07226310A (en) | Magnetic material | |
| JP3009804B2 (en) | Method for producing raw material powder for R-Fe-B-based permanent magnet |