NO320124B1 - Magnetiske materialer - Google Patents
Magnetiske materialer Download PDFInfo
- Publication number
- NO320124B1 NO320124B1 NO19982865A NO982865A NO320124B1 NO 320124 B1 NO320124 B1 NO 320124B1 NO 19982865 A NO19982865 A NO 19982865A NO 982865 A NO982865 A NO 982865A NO 320124 B1 NO320124 B1 NO 320124B1
- Authority
- NO
- Norway
- Prior art keywords
- magnetic
- materials
- magnetic materials
- rare earth
- iron
- Prior art date
Links
- 239000000696 magnetic material Substances 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims 1
- 230000005291 magnetic effect Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910001329 Terfenol-D Inorganic materials 0.000 description 2
- -1 Terphenol compound Chemical class 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- 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
- H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
- H01F1/0306—Metals or alloys, e.g. LAVES phase alloys of the MgCu2-type
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N35/00—Magnetostrictive devices
- H10N35/80—Constructional details
- H10N35/85—Magnetostrictive active materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
- Valve Device For Special Equipments (AREA)
Description
Foreliggende oppfinnelse vedrører generelt magnetiske materialer og spesielt magnetiske materialer som utviser magnetostriktive egenskaper.
En kjent form for et slikt magnetisk materiale er et magnetisk jem-basert materiale som i tillegg til jern i kombinasjon innbefatter sjeldne jordarts-elementer i forskjellige meng-der. Jerninnholdet til materialet er ansvarlig for den høyere Curie-temperaturen til materialet. Magnetostriksjon kommer fra de sjeldne jordatrsmetallene. Sjeldne jordartsmetaller er ferromagnetiske ved meget lave temperaturer, d.v.s. 4K.
Et eksempel på slike materialer er materialer av Terfenol-typen som for eksempel er kjent fra: S.C. Busbridge, A.R. Piercy, "Domain configurations in the giant magneto-strictive TbxHolxFel.9 system in different easy axis regimes", Journal of Applied Physics, 1993, vol 73, nr. 10 Pt2A, side 5354-5356.
S.C. Busbridge, A.R. Piercy, "Magnetostriction and magnetization processes in TbxHolxFel.9", Journal of Magnetism and Magnetic materials, 1995, vol. 144, nr, Pt2, side 817-818.
S.C. Busbridge, A.R.Piercy, "Magnetomechanical properties and anisotropy compensa-tion in quaternary rare earth-iron materials of the type TbxDyyHozFe2", IEEE transac-tions on Magnetics, 1995, vol. 31, nr. 6Pt2, side 4044-4046.
EP 0 509 628 beskriver en magnetostriktiv legering av formelen TbxRyDyi.x.y(Fei. zMnz)w hvor x + y er mindre enn 1, 0,005<y<0,9,0,005<z<0,5, l,5^w^2,5 og R er minst en av Y, Ln, Ce, Pr, Nd og Sm.
Al-Jiboory M. et al., J. Appl. Phys., bind 73, nr. 10,1993, s. 6168-6170 omhandler Terfenol-D som har formelen Tbo,3Dyo,7Fe2.
I henhold til oppfinnelsen er det tilveiebragt et magnetisk materiale med formelen:
hvor 0<x<0.05,
Med henvisning til figuren, er det vist magnetisk induserte påkjenninger i materialene av den ovenfor beskrevne type, over et temperaturområde fra ca. 20°C til ca. 270°C. Den magnetiske påkjenningen er indusert av et forspenningsfelt på 120 A/m påført over materialet. Påkjenningen måles med påkjenningsmålere i enheter på ppm (parts per million). X\ i og Xi angir påkjenningen målt parallelt og loddrett på den magnetiske felt-retningen. Det ble undersøkt seks materialer, alle med generell formel:
Med x = 0.025, 0.050, 0.075, 0.100, 0.125 og 0.150.
For sammenligning ble det også undersøkt to materialer som ikke inneholdt serium
Det vil sees at når x = 0.025 og 0.050 hadde materialene en økt magnetisk indusert på-kjenning over det meste av det undersøkte temperaturområdet. Dette var spesielt tilfelle for materialet x = 0.025.
Den langtrekkende magnetiske ordenen i et materiale blir brutt ned ved Curie-temperaturen ved termisk energi. Desto sterkere utbytningsinteraksjonen er mellom de magnetiske momentene, jo mer termisk energi er nødvendig for å bryte opp den magnetiske ordenen. I det vesentlige betyr dette at det er nødvendig med en høyere temperatur. Over sin Curi-temperatur blir materialene paramagnetiske, det vil si ikke-magnetiske. Magnetostriktive egenskaper oppstår fra avhengigheten av endringshastig-heten til de magnetiske egenskapene som er tilstede i materialet. Dersom det ikke er noen magnetisering, er det heller ingen magnetostriksjon.
Tilsettingen av små menger serium opprettholder den magnetisk induserte påkjenningen i materialet, i det vesentlige over verdiene for den opprinnelige Terfenolforbindelsen for temperaturer opptil 250°C. Dette er overraskende siden konvensjonell teori forutsier at erstatning av jern med ioner av sjeldne jordartsmetaller kan medføre et fall i Curie-temperaturen og derved en ødeleggelse av de magnetostriktive egenskaper ved høyere temperaturer.
Claims (1)
- Magnetisk materiale, karakterisert ved at materialet har en kjemisk formel:hvor 0<x<0.05.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9526177A GB2308384B (en) | 1995-12-21 | 1995-12-21 | Magnetic materials |
PCT/GB1996/003118 WO1997023913A1 (en) | 1995-12-21 | 1996-12-17 | Magnetic materials |
Publications (3)
Publication Number | Publication Date |
---|---|
NO982865D0 NO982865D0 (no) | 1998-06-19 |
NO982865L NO982865L (no) | 1998-08-19 |
NO320124B1 true NO320124B1 (no) | 2005-10-31 |
Family
ID=10785830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO19982865A NO320124B1 (no) | 1995-12-21 | 1998-06-19 | Magnetiske materialer |
Country Status (9)
Country | Link |
---|---|
US (1) | US5997660A (no) |
EP (1) | EP0868754B1 (no) |
AU (1) | AU712526B2 (no) |
CA (1) | CA2240958C (no) |
DE (1) | DE69604422T2 (no) |
GB (1) | GB2308384B (no) |
NO (1) | NO320124B1 (no) |
WO (1) | WO1997023913A1 (no) |
ZA (1) | ZA9610779B (no) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1322599C (zh) * | 2003-09-28 | 2007-06-20 | 北京航空航天大学 | 新型宽温域巨磁致伸缩材料及其制备方法 |
GB0519843D0 (en) * | 2005-09-29 | 2005-11-09 | Univ Cambridge Tech | Magnetocaloric refrigerant |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1513298A (en) * | 1975-09-05 | 1978-06-07 | Furukawa Electric Co Ltd | Wear-resisting high permeability alloy |
US4152178A (en) * | 1978-01-24 | 1979-05-01 | The United States Of America As Represented By The United States Department Of Energy | Sintered rare earth-iron Laves phase magnetostrictive alloy product and preparation thereof |
US4308474A (en) * | 1979-11-14 | 1981-12-29 | The United States Of America As Represented By The Secretary Of The Navy | Rare earth-iron magnetostrictive materials and devices using these materials |
GB2093480B (en) * | 1981-02-25 | 1984-10-17 | Nippon Steel Corp | Non-oriented silicon steel sheet |
EP0144112B1 (en) * | 1983-10-26 | 1989-09-27 | General Motors Corporation | High energy product rare earth-transition metal magnet alloys containing boron |
EP0338597B1 (en) * | 1984-02-28 | 1995-01-11 | Sumitomo Special Metals Co., Ltd. | Permanent magnets |
US5125988A (en) * | 1987-03-02 | 1992-06-30 | Seiko Epson Corporation | Rare earth-iron system permanent magnet and process for producing the same |
DE3883038T2 (de) * | 1987-03-23 | 1994-01-05 | Tokin Corp | Verfahren zur Herstellung eines anisotropen seltene Erden-Eisen-Bor-Verbundmagneten mit Hilfe von bandähnlichen Spänen aus einer seltene Erden-Eisen-Bor-Legierung. |
US5336337A (en) * | 1991-02-05 | 1994-08-09 | Kabushiki Kaisha Toshiba | Magnetrostrictive materials and methods of making such materials |
-
1995
- 1995-12-21 GB GB9526177A patent/GB2308384B/en not_active Revoked
-
1996
- 1996-12-17 AU AU11853/97A patent/AU712526B2/en not_active Ceased
- 1996-12-17 WO PCT/GB1996/003118 patent/WO1997023913A1/en active IP Right Grant
- 1996-12-17 EP EP96942475A patent/EP0868754B1/en not_active Expired - Lifetime
- 1996-12-17 CA CA002240958A patent/CA2240958C/en not_active Expired - Fee Related
- 1996-12-17 DE DE69604422T patent/DE69604422T2/de not_active Expired - Fee Related
- 1996-12-17 US US09/091,637 patent/US5997660A/en not_active Expired - Fee Related
- 1996-12-20 ZA ZA9610779A patent/ZA9610779B/xx unknown
-
1998
- 1998-06-19 NO NO19982865A patent/NO320124B1/no unknown
Also Published As
Publication number | Publication date |
---|---|
NO982865L (no) | 1998-08-19 |
WO1997023913A1 (en) | 1997-07-03 |
DE69604422D1 (de) | 1999-10-28 |
EP0868754A1 (en) | 1998-10-07 |
CA2240958C (en) | 2003-09-30 |
AU1185397A (en) | 1997-07-17 |
AU712526B2 (en) | 1999-11-11 |
GB2308384B (en) | 1999-09-15 |
EP0868754B1 (en) | 1999-09-22 |
GB9526177D0 (en) | 1996-02-21 |
CA2240958A1 (en) | 1997-07-03 |
GB2308384A (en) | 1997-06-25 |
ZA9610779B (en) | 1998-06-22 |
NO982865D0 (no) | 1998-06-19 |
US5997660A (en) | 1999-12-07 |
DE69604422T2 (de) | 2000-05-11 |
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