EP2158595A1 - Verfahren zur herstellung einer magnetschicht auf einem substrat und druckbarer magnetisierbarer lack - Google Patents

Verfahren zur herstellung einer magnetschicht auf einem substrat und druckbarer magnetisierbarer lack

Info

Publication number
EP2158595A1
EP2158595A1 EP08749496A EP08749496A EP2158595A1 EP 2158595 A1 EP2158595 A1 EP 2158595A1 EP 08749496 A EP08749496 A EP 08749496A EP 08749496 A EP08749496 A EP 08749496A EP 2158595 A1 EP2158595 A1 EP 2158595A1
Authority
EP
European Patent Office
Prior art keywords
weight
matrix
substrate
mixture
powder
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Withdrawn
Application number
EP08749496A
Other languages
German (de)
English (en)
French (fr)
Inventor
Oliver Senkel
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.)
Bourns Inc
Original Assignee
Bourns Inc
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 Bourns Inc filed Critical Bourns Inc
Publication of EP2158595A1 publication Critical patent/EP2158595A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus 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
    • H01F41/14—Apparatus 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 applying magnetic films to substrates
    • H01F41/16—Apparatus 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 applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/45—Anti-settling agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • 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
    • H01F1/0027—Thick magnetic films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • 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
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Definitions

  • the invention relates to a method for producing a magnetic layer on a substrate and to a printable magnetizable lacquer.
  • Non-contact sensors are used to measure the position, orientation, rotation angle or the like of a component.
  • Examples in automobile technology include linear displacement sensors on shock absorbers, rotation angle sensors for determining the steering angle or throttle position sensors, to name just a few examples.
  • Non-contact sensors have, among other things, the significant advantage compared to potentiometers with a wiper tap, that they are practically free of wear and substantially less susceptible to mechanical shock. They are therefore far more reliable and have a longer life.
  • Non-contact sensors uses magnetic sensor layers, which are scanned by magnetic field-sensitive sensors. Examples of this are described in DE 100 38 296 A1, DE 195 36 433 C2 or DE 10 2004 057 901.
  • Magnetically active sensor layers made of a substrate can be applied in various ways.
  • DE 199 11 186 A1 proposes to apply a magnetic layer to a substrate by electroplating. For high current densities and disposal costs of the electrolyte used after use are necessary.
  • DE 39 15 446 A1 proposes the use of a neodymium-iron-boron permanent magnet in which the magnet is provided with an ⁇ -Fe 2 O 3 coating to prevent corrosion, the magnet being subjected to an annealing treatment in an oxidizing atmosphere at temperatures between 600 0 C and the sintering temperature is exposed.
  • DE 10 038 296 A1 and DE 10 309 027 A1 propose magnetically hard magnetic powders with the highest possible remanence and high coercive field strength, for which Sr hexaferrite powders and NdFeB powders are investigated.
  • the Sr hexaferrite is preferred over the neodymium iron boron.
  • the commercially available NdFeB powders have an average particle size of 200 ⁇ m. They are therefore too coarse-grained and must be ground before use, so that average particle diameter can be achieved by l ⁇ m. It is therefore proposed a complex pretreatment of the powders, which are then bonded in a polymer matrix for the production of printing paste, are proposed for the predominantly amine-curing epoxides based on bisphenol-F.
  • DE 39 211 46 A1 proposes a highly coercive magnetic strip in which a magnetic layer of a dispersion of magnetizable particles based on hexagonal ferrites is applied to a carrier film by casting.
  • magnetoresistive materials are also described, which are characterized by a nanoscale
  • Layer structure are marked.
  • GMR GMR, AMR or TMR components among the known materials, at where the distance between the individual layers is smaller than the mean free path of the electrons.
  • a coupling effect of the electrons is achieved in the neighboring layer and thus the electrical resistance of the material changed (see DE 38 20 475 Cl).
  • This effect can also be used for measuring the distance or angle (compare DE 10 108 760 A1, DE 10 214 946 A1, DE 10 22 67 A1).
  • DE 697 20 206 T2 (WO 97/03842; EP 0 898 778 B1) describes a bonded magnet made of a magnetic powder and a binder, wherein essentially a neodymium-iron-boron powder and as a binder epoxide is used.
  • Other additions include niobium or other metals such as tungsten, chromium, nickel aluminum, copper, magnesium and manganese, gallium, vanadium, molybdenum, titanium, tantalum, zirconium and tin, as well as additions of carbon, calcium, silicon, oxygen and tin Nitrogen.
  • DE 40 41 962 A1 also describes a polymer-bound anisotropic magnetic material based on finely divided hexaferrites and an epoxy-amine addition polymer.
  • Strontium hexaferrite powder is also disclosed in EP 0 351 775 B1 (DE 689 052 51 T2) and DE 39 21 146 Al described.
  • the problem of the invention is to provide a method for producing a magnetic layer on a substrate as well as a printable magnetizable varnish which fulfill the following criteria as well as possible:
  • the cured lacquer should have good magnetic properties, in particular high coercivity and high remanence; the paint should be as homogeneous as possible; the lacquer should be storable for a longer period of time, - the lacquer should be able to be applied with well-known application methods even in high layer thickness with precise contours; and the paint should be inexpensive to produce.
  • the paint When referring to "the paint”, it means the paint before curing; If statements relate to the cured paint, this is always explicitly mentioned.
  • the paint according to the invention is composed as follows:
  • neodymium-iron-boron powder about 10% by weight ferrite powder, preferably strontium-hexaferrite powder; about 1.4% by weight of a catalyst; about 1.1% by weight of a dispersing aid;
  • Remainder of a matrix preferably an epoxy-polyol matrix.
  • ferrite powder preferably strontium hexaferrite powder
  • a matrix preferably an epoxy-polyol matrix.
  • the paint contains in the matrix a solvent which evaporates on curing.
  • the cured paint therefore has a lower percentage of the matrix and a higher proportion of the neodymium-iron-boron powder because of the then missing solvent of the matrix, wherein its proportion in the cured paint can be up to 70% by weight.
  • the saturation polarization of the hardened and magnetic was found to be 202mT at 43OmT, the coercive force at 625 KA / m, and the energy product (B x H) at 6.78 mJ / cm 3 , with magnetized strips having a pole width of 2.5 mm and a layer thickness of 25 ⁇ m were applied.
  • the thus prepared not yet cured lacquer was also excellent storage for several weeks after cooling and excellent printability after storage. There were no segregations or sedimentation.
  • the method according to the invention for producing a magnetic layer on a substrate comprises the following successive steps:
  • step b) a reworking of the rolled mixture may still be required by once again adding dispersion auxiliaries, depending on the viscosity, and carrying out a repeated rolling.
  • the rolling after step b) and optionally re-rolling takes place vozugêt on a three-roll mill.
  • a mechanical reworking of the cured layer can still take place, which is preferably done by milling or grinding, if the printed image does not meet the precision requirements.
  • the pre-cure is carried out for six to twelve hours and allows for controlled evaporation of the solvent of the matrix, thus avoiding the presence of solvent inclusions and a density gradient in the material.
  • a non-cured layer is obtained, which can still be easily deformed.
  • the pre-hardening with subsequent hardening results in a smooth layer, which no longer shows any holes or inclusions even when gradual milling.
  • the neodymium-iron-boron powder is an alloy of the type Nd 2 Fe 14 B in spherical form, available from Magnequench under the name MQP-S-11-9. This mixture has a particle diameter of 40 ⁇ m with a distribution of 35-55 ⁇ m.
  • the ferrite powder is mixed in the specified amount, wherein in a concrete embodiment, strontium hexaferrite powder (Sr-Fe 3 O 4 ) is added in the form of sintered particles having a particle size of 5 .mu.m.
  • the mixture was rolled in the concrete embodiment in a three-roll mill.
  • the particles were split due to deagglomeration of larger clusters. After rolling, no sedimentation of the metal particles was found even after a long storage time, the paint was still flowable and thus processable even after 12 hours of service in a refrigerator. In the cool storage thus no crosslinking occurred.
  • the magnetic layer applied to the substrate was subjected to a moisture storage of 100 hours, at a Temperature of 40 0 C and 95% humidity.
  • the moisture absorption was less than 0.1%. Also, no optical changes could be detected on the magnetic layers.
  • the magnetic layer is also resistant to corrosion.
  • polymer matrix a commercially available synthetic resin such as epoxy, polyester or polyurethane with an amine or phenolic hardener can be used. In the specific embodiment, epoxy was used.
  • the matrix contains even more additives for accelerating the reaction in the form of a catalyst and dispersing agents for which commercially available surfactants are used.
  • solvents such as alcohols or ketones, are added to the mixture.
  • Al 2 O 3 ceramics or commercially available plastics such as laminated epoxy / glass fabric plates are preferably used as the substrate.
  • the layer thickness is to be selected for practical applications of sensors at least 200 ⁇ m and can go up to lOOO ⁇ m. These layer thicknesses can best be realized in stencil printing.
  • precuring is carried out for six to twelve hours at 80-120 0 C. Shorter drying times or higher temperatures lead to undesirable cavitation or bubble formation. It is achieved a controlled evaporation of the solvent. The subsequent curing, which causes a complete crosslinking of the substances takes place for one to three hours at 200-220 0 C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Thin Magnetic Films (AREA)
EP08749496A 2007-06-05 2008-05-23 Verfahren zur herstellung einer magnetschicht auf einem substrat und druckbarer magnetisierbarer lack Withdrawn EP2158595A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007026503A DE102007026503B4 (de) 2007-06-05 2007-06-05 Verfahren zur Herstellung einer Magnetschicht auf einem Substrat und druckbarer magnetisierbarer Lack
PCT/EP2008/004108 WO2008148467A1 (de) 2007-06-05 2008-05-23 Verfahren zur herstellung einer magnetschicht auf einem substrat und druckbarer magnetisierbarer lack

Publications (1)

Publication Number Publication Date
EP2158595A1 true EP2158595A1 (de) 2010-03-03

Family

ID=39735461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08749496A Withdrawn EP2158595A1 (de) 2007-06-05 2008-05-23 Verfahren zur herstellung einer magnetschicht auf einem substrat und druckbarer magnetisierbarer lack

Country Status (8)

Country Link
US (1) US20100129540A1 (enrdf_load_stackoverflow)
EP (1) EP2158595A1 (enrdf_load_stackoverflow)
JP (1) JP2010529661A (enrdf_load_stackoverflow)
KR (1) KR20100018492A (enrdf_load_stackoverflow)
CN (1) CN101711418A (enrdf_load_stackoverflow)
DE (1) DE102007026503B4 (enrdf_load_stackoverflow)
MX (1) MX2009012852A (enrdf_load_stackoverflow)
WO (1) WO2008148467A1 (enrdf_load_stackoverflow)

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DE102009010248A1 (de) 2009-02-24 2010-09-02 Dürr Systems GmbH Beschichtungsvorrichtung und Beschichtungsverfahren zur Beschichtung eines Werkstücks
RU2476939C1 (ru) * 2011-08-30 2013-02-27 Учреждение Российской академии наук Институт металлургии и материаловедения им. А.А. Байкова РАН Способ получения текстурированных покрытий с анизотропной коэрцитивной силой на основе магнитных соединений
KR101376076B1 (ko) * 2012-08-09 2014-03-19 한국수력원자력 주식회사 노외 노심용융물 냉각설비 희생 콘크리트 조성물 및 이의 제조방법
US9596755B2 (en) * 2014-10-15 2017-03-14 Rogers Corporation Magneto-dielectric substrate, circuit material, and assembly having the same
MX2018001620A (es) * 2015-08-07 2018-06-11 Evolva Sa Produccion de glucosidos de esteviol en hospedadores recombinantes.
GB2585601B (en) 2018-04-12 2023-04-26 Rogers Corp Textured planar M-type hexagonal ferrites and methods of use thereof
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Also Published As

Publication number Publication date
WO2008148467A1 (de) 2008-12-11
JP2010529661A (ja) 2010-08-26
CN101711418A (zh) 2010-05-19
DE102007026503A1 (de) 2008-12-11
US20100129540A1 (en) 2010-05-27
DE102007026503B4 (de) 2009-08-27
KR20100018492A (ko) 2010-02-17
MX2009012852A (es) 2009-12-11

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