DE4041962A1 - Polymer-bonded anisotropic magnet materials - contain 80-95 wt. per cent strontium and/or barium hexa:ferrite, in polymer matrix obtd. by poly addn. of di:epoxide and amine - Google Patents
Polymer-bonded anisotropic magnet materials - contain 80-95 wt. per cent strontium and/or barium hexa:ferrite, in polymer matrix obtd. by poly addn. of di:epoxide and amineInfo
- Publication number
- DE4041962A1 DE4041962A1 DE19904041962 DE4041962A DE4041962A1 DE 4041962 A1 DE4041962 A1 DE 4041962A1 DE 19904041962 DE19904041962 DE 19904041962 DE 4041962 A DE4041962 A DE 4041962A DE 4041962 A1 DE4041962 A1 DE 4041962A1
- Authority
- DE
- Germany
- Prior art keywords
- polymer
- dgeba
- magnetic material
- material according
- benzylamine
- 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.)
- Withdrawn
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Classifications
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- 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
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
Die Erfindung betrifft ein polymergebundenes anisotropes Magnetma terial, welches bei der Entwicklung und Herstellung von elektri schen Geräten (Unterhaltungs- und Kommunikationselektronik, Haus haltgeräte) angewendet werden kann. Plastgebundene Dauermagnete auf der Basis von Hexaferritpulvern und einer breiten Palette von organischen Polymeren sind bekannt. Kompositmaterialien dieser Art besitzen schlechtere magnetische Kennwerte als herkömmliche gesin terte Magnete, zeichnen sich jedoch durch Vorteile, wie leichte Formgebung und Verarbeitbarkeit, sowie die Möglichkeit der Präzi sionsherstellung von kleinen und komplizierten Teilen aus.The invention relates to a polymer-bound anisotropic magnet material that is used in the development and manufacture of electri devices (entertainment and communication electronics, home holding devices) can be used. Plastic bonded permanent magnets based on hexaferrite powders and a wide range of organic polymers are known. Composite materials of this type have poorer magnetic characteristics than conventional Gesin tert magnets, but are characterized by advantages such as light Shape and processability, as well as the possibility of precision production of small and complicated parts.
Je nach Art der Polymerkomponente werden thermoplast-, elastomer- oder duroplastgebundene Magnete produziert. Es zeichnet sich dabei der Trend ab, daß für hart-zähe Materialien vorwiegend Polyamide (Nylon 6, Nylon 11, Nylon 12) sowie isotaktisches Polypropylen (JP 61/1 79 258 A, JP 61/1 79 506 A2, JP 63/1 53 866 A2, JP 01/1 37 604 A2) und für weich-zähe Materialien verschiedenste Kautschuktypen, Ethylen-Vinylacetatcopolymere, chlorierte bzw. sulfochlorierte Polyolefine, Polyester und Polyacetale sowie deren Blends eingesetzt werden (JP 59/1 66 549 A2, JP 60/2 06 110 A2, JP 62/1 16 647 A2, JP 01/1 31 259 A2, JP 01/1 31 260 A2).Depending on the type of polymer component, thermoplastic, elastomer or thermoset-bonded magnets. It stands out the trend starts that for hard-tough materials mainly polyamides (Nylon 6, nylon 11, nylon 12) and isotactic polypropylene (JP 61/1 79 258 A, JP 61/1 79 506 A2, JP 63/1 53 866 A2, JP 01/1 37 604 A2) and various for soft-tough materials Rubber types, ethylene-vinyl acetate copolymers, chlorinated or sulfochlorinated polyolefins, polyesters and polyacetals and their Blends can be used (JP 59/1 66 549 A2, JP 60/2 06 110 A2, JP 62/1 16 647 A2, JP 01/1 31 259 A2, JP 01/1 31 260 A2).
Als Zusatzstoffe dienen in den meisten Fällen Weichmacher wie z. B. Polyisobuten oder niedermolekulare organische Verbindungen, Stabi lisatoren, Gleitmittel (JP 59/1 42 252 A2, JP 60/0 40 144 A2, JP 61/1 54 113 A2, JP 63/2 18 759 A2, JP 01/1 31 259 A2, JP 01/1 31 260 A2) und Haftvermittler. Insbesondere der Einsatz von Haftvermittlern ist aufgrund der Unverträglichkeit zwischen Ferrit oberfläche und jeweiliger Polymermatrix für das Erreichen von sehr hohen Füllgraden (95 Ma.-%) unerläßlich. Verwendete Haftvermittler sind dabei vorrangig Silane (JP 60/2 23 859 A2, JP 62/1 06 604 A2, JP 62/1 06 605 A2), Titanate (JP 6/1 71 101 A2, JP 62/2 59 404 A2, JP 63/1 61 054 A2, JP 63/1 61 055 A2) und langkettige aliphatische Carbonsäuren bzw. deren Derivate (JP 62/0 30 14 484, JP 64/0 00 157).In most cases, additives such as plasticizers are used as additives. B. Polyisobutene or low molecular weight organic compounds, stabilizers lisators, lubricants (JP 59/1 42 252 A2, JP 60/0 40 144 A2, JP 61/1 54 113 A2, JP 63/2 18 759 A2, JP 01/1 31 259 A2, JP 01/1 31 260 A2) and adhesion promoter. In particular the use of Adhesion promoter is due to the intolerance between ferrite surface and respective polymer matrix for achieving very high fill levels (95% by mass) are indispensable. Adhesion promoters used are primarily silanes (JP 60/2 23 859 A2, JP 62/1 06 604 A2, JP 62/1 06 605 A2), Titanate (JP 6/1 71 101 A2, JP 62/2 59 404 A2, JP 63/1 61 054 A2, JP 63/1 61 055 A2) and long-chain aliphatic Carboxylic acids or their derivatives (JP 62/0 30 14 484, JP 64/0 00 157).
Der Haftvermittler hat dabei im wesentlichen folgende Funktionen zu erfüllen:The adhesion promoter essentially has the following functions to fulfill:
- - Erniedrigung der Oberflächenenergie des Füllstoffes und Verbes serung der Wechselwirkung zur Polymermatrix,- Lowering the surface energy of the filler and verb interaction with the polymer matrix,
- - Erhöhung der Dispersität der Füllstoffteilchen in der Polymer matrix,- Increase the dispersity of the filler particles in the polymer matrix,
- - Ausbildung einer optimalen Adhäsion zum Füllstoff,Formation of an optimal adhesion to the filler,
- - Gewährleistung einer ausreichenden Materialflexibilität.- Ensuring sufficient material flexibility.
Wünschenswert wären Matrixpolymere, die aufgrund ihrer Eigenschaf ten oben genannte Funktionen bei sehr hohen Füllstoffgehalten ohne Einsatz von Haftvermittlern garantieren und die Ausrichtung der Ferritpartikel im Herstellungsprozeß begünstigen. Geeignet er scheinen hierfür von Hörhold et al. entwickelte hochmolekulare thermoplastische Epoxid-Amin-Additionspolymere auf Basis von Diep oxiden und primären Monoaminen (DD 1 54 985) sowie aus disekundären Diaminen (DD 1 41 677, DD 1 49 534, DD 2 11 799, DD 2 31 079).Matrix polymers would be desirable because of their properties ten above functions at very high filler contents without Use of adhesion promoters to guarantee and align the Favor ferrite particles in the manufacturing process. Suitable he seem to be from Hörhold et al. developed high molecular weight thermoplastic epoxy-amine addition polymers based on Diep oxides and primary monoamines (DD 1 54 985) as well as from secondary ones Diamines (DD 1 41 677, DD 1 49 534, DD 2 11 799, DD 2 31 079).
Es ist Aufgabe der Erfindung, ein polymergebundenes anisotropes Magnetmaterial zur Verfügung zu stellen, das sich durch eine unkomplizierte Herstellung und sehr gute mechanische und magneti sche Eigenschaften auszeichnet.It is an object of the invention to provide a polymer-bound anisotropic To provide magnetic material that is characterized by a uncomplicated manufacture and very good mechanical and magneti features.
Erfindungsgemäß wird die Aufgabe gelöst durch ein polymergebunde nes anisotropes Magnetmaterial auf Basis feinteiliger Hexaferrite, dadurch gekennzeichnet, daß es Strontium- und/oder Bariumhexafer rite mit einem mittleren Teilchendurchmesser von 0,5 bis 5 µm in einem Anteil von 80 bis 95 Ma.-% enthält, die in eine durch Poly addition entstandene Polymermatrix aus einem Diepoxid und einem Amin mit zwei oder mehreren an Stickstoff gebundenen H-Atomen eingelagert sind.According to the invention the object is achieved by a polymer-bound anisotropic magnetic material based on finely divided hexaferrites, characterized in that it is strontium and / or barium hexafer rite with an average particle diameter of 0.5 to 5 µm in contains a proportion of 80 to 95% by mass, which in a by poly addition resulting polymer matrix from a diepoxide and a Amine with two or more nitrogen atoms bound to nitrogen are stored.
Als Komponenten der polymerisationsfähigen organischen Matrix wer den neben Diepoxiden, insbesondere Bisphenol-A-diglycidylether oder Bisphenol-F-diglycidether (Isomerengemisch) araliphatische oder aromatische primäre Monoamine, Oligoetherdiamine sowie aus der Epoxidharzchemie bekannte mehrfunktionelle Härteramine einge setzt.As components of the polymerizable organic matrix who those in addition to diepoxides, especially bisphenol A diglycidyl ether or bisphenol-F-diglycidyl ether (mixture of isomers) araliphatic or aromatic primary monoamines, oligoether diamines as well known multi-functional hardener amines used in epoxy resin chemistry puts.
Geeignete Amine sind Ethanolamin, Benzylamin, Anilin, N,N′-Di benzyl-5-oxanonan-diamin-1,9 (OPC 91), N,N-Dibenzylethylendiamin, N,N′-Dibenzyl-3,6-dioxaoctandiamin-1,8, N,N-Dipropylentriamin (H3) oder 4,4′-Diaminodiphenylmethan (MDA). Die Härtung des polymerge bundenen anisotropen Magnetmaterials erfolgt bei Temperaturen von 80 bis 120°C in einem Magnetfeld der Feldstärke von 3 bis 15 KOe. Epoxid-Amin Additionspolymere auf der Basis der beschriebenen Monomeren enthalten eine Häufung periodisch wiederkehrender Amin-, Ether- und Hydroxylgruppen in der Polymerhauptkette, die aufgrund ihrer Anordnung in der Lage sind, eine Vielzahl von zwei- und dreiwertigen Metallionen zu komplexieren. Dieses Phänomen ist als Ursache für die hervorragende Adhäsion dieser Additionspolymeren auf anorganischen Oberflächen anzusehen und ermöglicht in dem erfindungsgemäßen polymergebundenen anisotropen Magnetmaterial Füllstoffgehalte bis zu 95 Ma.-% ohne den Einsatz von herkömmli chen Haftvermittlern. Hervorzuheben ist, daß die mechanischen Eigenschaften des erfindungsgemäßen polymergebundenen anisotropen Magnetmaterials durch die gezielte Kombination der einzelnen Aminkomponenten in weiten Grenzen variiert werden können. Bei Verwendung von polymerisationsfähigen Aminkomponenten mit nur zwei aktiven NH-Funktionen sind thermoplastisch verarbeitbare Magnetma terialien erhältlich.Suitable amines are ethanolamine, benzylamine, aniline, N, N'-di benzyl-5-oxanonanediamine-1,9 (OPC 91), N, N-dibenzylethylenediamine, N, N'-dibenzyl-3,6-dioxaoctanediamine 1,8, N, N-dipropylenetriamine (H 3 ) or 4,4'-diaminodiphenylmethane (MDA). The polymer-bound anisotropic magnetic material is cured at temperatures of 80 to 120 ° C in a magnetic field with a field strength of 3 to 15 KOe. Epoxy-amine addition polymers based on the monomers described contain an accumulation of periodically recurring amine, ether and hydroxyl groups in the main polymer chain, which due to their arrangement are able to complex a large number of divalent and trivalent metal ions. This phenomenon is to be regarded as the cause of the excellent adhesion of these addition polymers to inorganic surfaces and enables filler contents of up to 95% by mass in the polymer-bound anisotropic magnetic material according to the invention without the use of conventional adhesion promoters. It should be emphasized that the mechanical properties of the polymer-bound anisotropic magnetic material according to the invention can be varied within wide limits by the targeted combination of the individual amine components. When using polymerizable amine components with only two active NH functions, thermoplastically processable magnetic materials are available.
In den nachfolgend aufgeführten Ausführungsbeispielen wird das erfindungsgemäße polymergebundene anisotrope Magnetmaterial näher beschrieben.In the exemplary embodiments listed below, this is polymer-bound anisotropic magnetic material according to the invention described.
13,5 g eines Strontiumhexaferrites (σ=65 Gcm3 g-1; IHc=3320 Oe)
werden mit einer flüssigen Monomerenmischung, bestehend aus 1,159
g 2,2-Bis[4-(2,3-epoxypropoxy)phenyl]-propan (DGEBA), 0,183 g Ben
zylamin und 0,158 g Anilin innig vermischt. Das pastenartige Mate
rial wird anschließend zu Probekörpern mit einem Durchmesser von
35 mm verpreßt. Die Aushärtung der Probe erfolgt in einem Zeitraum
von 1 h bei einer Temperatur von 100°C in einem Magnetfeld der
Stärke von 3 KOe. Das erhaltene Material besitzt folgende mechani
sche und magnetische Kennwerte:
Biegefestigkeit: 52,3 MPa
maximales Energieprodukt: B.Hmax=0,38 MGOe
13.5 g of a strontium hexaferrite (σ = 65 Gcm 3 g -1 ; I H c = 3320 Oe) are mixed with a liquid monomer mixture consisting of 1.159 g of 2,2-bis [4- (2,3-epoxypropoxy) phenyl] -propane (DGEBA), 0.183 g ben cylamine and 0.158 g aniline mixed intimately. The paste-like material is then pressed into test specimens with a diameter of 35 mm. The sample is cured over a period of 1 h at a temperature of 100 ° C in a magnetic field of 3 KOe. The material obtained has the following mechanical and magnetic characteristics:
Flexural strength: 52.3 MPa
maximum energy product: BH max = 0.38 MGOe
13,5 g eines Bariumhexaferrites σ=64,2 Gcm3 g-1; IHc=3560 Oe)
werden nach dem Zugeben von 1,117 g DGEBF und 0,383 g Benzylamin
miteinander vermischt und wie unter Ausführungsbeispiel 1 be
schrieben, weiter behandelt.
Eigenschaftsparameter:
Biegefestigkeit: 55,7 MPa
B.Hmax=0,81 MGOe13.5 g of a barium hexaferrite σ = 64.2 Gcm 3 g -1 ; I H c = 3560 Oe) are mixed together after the addition of 1.117 g DGEBF and 0.383 g benzylamine and are further treated as described in Example 1.
Property parameters: Flexural strength: 55.7 MPa
BH max = 0.81 MGOe
Zu einer flüssigen Monomerenmischung, bestehend aus 1,141 g DGEBA und 0,359 g Benzylamin werden 13,5 g eines Bariumhexaferrites σ=64,2 Gcm3 g-1; IHc=3560 Oe) hinzugefügt und innig zu einer Paste vermischt. Nach dem Aushärten dieser Paste bei 90°C (1 h) wird das gebildete Granulat bei 120°C verpreßt und in der Form bis zum Abkühlen auf 40°C im Magnetfeld (15 KOe) gelagert. Das Material zeigt folgende Eigenschaften: Biegefestigkeit: 60,0 MPa maximales Energieprodukt: 0,78 MGOeTo a liquid monomer mixture consisting of 1.141 g DGEBA and 0.359 g benzylamine, 13.5 g of a barium hexaferrite σ = 64.2 Gcm 3 g -1 ; I H c = 3560 Oe) and mixed intimately into a paste. After this paste has hardened at 90 ° C. (1 h), the granules formed are pressed at 120 ° C. and stored in the mold until they cool to 40 ° C. in a magnetic field (15 KOe). The material shows the following properties: Flexural strength: 60.0 MPa maximum energy product: 0.78 MGOe
13,5 g eines Bariumhexaferrites (σ=64,2 Gcm3 g-1; IHc=3560 Oe)
werden nach dem Zugeben von 0,905 g DGEBA, 0,142 g Benzylamin und
0,453 g N,N′-Dibenzyl-5-oxanonandiamin-1,9 (OPC 91) miteinander
vermischt und wie unter Ausführungsbeispiel 3 beschrieben, weiter
behandelt.
Eigenschaftsparameter:
Biegefestigkeit: 70,8 MPa
B.Hmax=0,82 MGOe13.5 g of a barium hexaferrite (σ = 64.2 Gcm 3 g -1 ; I H c = 3560 Oe) are after adding 0.905 g DGEBA, 0.142 g benzylamine and 0.453 g N, N'-dibenzyl-5-oxanonane diamine -1.9 (OPC 91) mixed together and treated as described in Example 3 .
Property parameters: Flexural strength: 70.8 MPa
BH max = 0.82 MGOe
In eine Lösung, bestehend aus 1,300 g DGEBA und 0,200 g N,N-Dipro
pylentriamin werden 13,5 g eines Strontiumhexaferrites eingearbei
tet. Die entstehende Paste wird nach dem Pressen im Magnetfeld
(3 KOe) bei 80°C (1 h) ausgehärtet.
Biegefestigkeit: 75,2 MPa
B.Hmax=0,39 MGOe
13.5 g of a strontium hexaferrite are incorporated into a solution consisting of 1,300 g of DGEBA and 0.200 g of N, N-dipropylenetriamine. The resulting paste is cured after pressing in a magnetic field ( 3 KOe) at 80 ° C (1 h).
Flexural strength: 75.2 MPa
BH max = 0.39 MGOe
13,5 g Bariumhexaferrit werden mit 1,162 g DGEBA und 0,338 g 4,4′-
Diaminodiphenylmethan (DMA) innig vermischt und verpreßt. Nach dem
Aushärten im Magnetfeld (15 KOe) bei 100° C (1 h) zeigt das Mate
rial folgende Eigenschaften:
Biegefestigkeit: 80,2 MPa
B.Hmax=0,80 MGOe13.5 g of barium hexaferrite are intimately mixed with 1.162 g of DGEBA and 0.338 g of 4,4'-diaminodiphenylmethane (DMA) and pressed. After curing in a magnetic field (15 KOe) at 100 ° C (1 h) the material shows the following properties:
Flexural strength: 80.2 MPa
BH max = 0.80 MGOe
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904041962 DE4041962A1 (en) | 1990-12-24 | 1990-12-24 | Polymer-bonded anisotropic magnet materials - contain 80-95 wt. per cent strontium and/or barium hexa:ferrite, in polymer matrix obtd. by poly addn. of di:epoxide and amine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904041962 DE4041962A1 (en) | 1990-12-24 | 1990-12-24 | Polymer-bonded anisotropic magnet materials - contain 80-95 wt. per cent strontium and/or barium hexa:ferrite, in polymer matrix obtd. by poly addn. of di:epoxide and amine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4041962A1 true DE4041962A1 (en) | 1992-06-25 |
Family
ID=6421545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19904041962 Withdrawn DE4041962A1 (en) | 1990-12-24 | 1990-12-24 | Polymer-bonded anisotropic magnet materials - contain 80-95 wt. per cent strontium and/or barium hexa:ferrite, in polymer matrix obtd. by poly addn. of di:epoxide and amine |
Country Status (1)
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DE (1) | DE4041962A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1112582A1 (en) * | 1998-09-11 | 2001-07-04 | Durakool Incorporated | Resin ceramic compositions having magnetic properties |
EP1981044A3 (en) * | 2007-03-30 | 2008-11-05 | Toda Kogyo Corporation | Ferrite particles for bonded magnet resin composition for bonded magnet and molded products using the same |
DE102007026503A1 (en) | 2007-06-05 | 2008-12-11 | Bourns, Inc., Riverside | Process for producing a magnetic layer on a substrate and printable magnetizable paint |
US20170299659A1 (en) * | 2014-11-26 | 2017-10-19 | Toyo Tire & Rubber Co., Ltd. | Sensor for monitoring sealed secondary battery, sealed secondary battery, and method for monitoring sealed secondary battery |
US20180038917A1 (en) * | 2014-07-10 | 2018-02-08 | Toyo Tire & Rubber Co., Ltd. | Sealed secondary battery deterioration diagnosis method and deterioration diagnosis system |
EP3748136A1 (en) * | 2019-06-04 | 2020-12-09 | Raytheon Technologies Corporation | Magnet for anti-ice system |
US11823823B2 (en) | 2013-10-02 | 2023-11-21 | Toda Kogyo Corporation | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
US11820055B2 (en) | 2013-04-03 | 2023-11-21 | Toda Kogyo Corp. | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
-
1990
- 1990-12-24 DE DE19904041962 patent/DE4041962A1/en not_active Withdrawn
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1112582A1 (en) * | 1998-09-11 | 2001-07-04 | Durakool Incorporated | Resin ceramic compositions having magnetic properties |
EP1112582A4 (en) * | 1998-09-11 | 2003-04-23 | Dana Corp | Resin ceramic compositions having magnetic properties |
US6818478B1 (en) | 1998-09-11 | 2004-11-16 | Dana Corporation | Resin ceramic compositions having magnetic properties |
US8741170B2 (en) | 2007-03-30 | 2014-06-03 | Toda Kogyo Corporation | Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same |
EP1981044A3 (en) * | 2007-03-30 | 2008-11-05 | Toda Kogyo Corporation | Ferrite particles for bonded magnet resin composition for bonded magnet and molded products using the same |
US9607741B2 (en) | 2007-03-30 | 2017-03-28 | Toda Kogyo Corporation | Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same |
DE102007026503A1 (en) | 2007-06-05 | 2008-12-11 | Bourns, Inc., Riverside | Process for producing a magnetic layer on a substrate and printable magnetizable paint |
DE102007026503B4 (en) * | 2007-06-05 | 2009-08-27 | Bourns, Inc., Riverside | Process for producing a magnetic layer on a substrate and printable magnetizable paint |
US11820055B2 (en) | 2013-04-03 | 2023-11-21 | Toda Kogyo Corp. | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
US11823823B2 (en) | 2013-10-02 | 2023-11-21 | Toda Kogyo Corporation | Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same |
US20180038917A1 (en) * | 2014-07-10 | 2018-02-08 | Toyo Tire & Rubber Co., Ltd. | Sealed secondary battery deterioration diagnosis method and deterioration diagnosis system |
US20170299659A1 (en) * | 2014-11-26 | 2017-10-19 | Toyo Tire & Rubber Co., Ltd. | Sensor for monitoring sealed secondary battery, sealed secondary battery, and method for monitoring sealed secondary battery |
US10094884B2 (en) * | 2014-11-26 | 2018-10-09 | Toyo Tire & Rubber Co., Ltd. | Sensor including a polymer matrix for monitoring sealed secondary battery, sealed secondary battery including the monitoring sensor, and method for monitoring sealed secondary battery |
EP3748136A1 (en) * | 2019-06-04 | 2020-12-09 | Raytheon Technologies Corporation | Magnet for anti-ice system |
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