WO2015018725A1 - Particules à noyau-enveloppe contenant de l'oxyde de fer et du dioxyde de silicium présentant une vitesse de chauffage améliorée - Google Patents

Particules à noyau-enveloppe contenant de l'oxyde de fer et du dioxyde de silicium présentant une vitesse de chauffage améliorée Download PDF

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Publication number
WO2015018725A1
WO2015018725A1 PCT/EP2014/066458 EP2014066458W WO2015018725A1 WO 2015018725 A1 WO2015018725 A1 WO 2015018725A1 EP 2014066458 W EP2014066458 W EP 2014066458W WO 2015018725 A1 WO2015018725 A1 WO 2015018725A1
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Prior art keywords
core
oxide
shell particles
shell
particles according
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PCT/EP2014/066458
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German (de)
English (en)
Inventor
Stipan Katusic
Harald Herzog
Peter Kress
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Evonik Industries Ag
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Publication of WO2015018725A1 publication Critical patent/WO2015018725A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • 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
    • 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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/02—Polysilicates
    • 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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/34—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 soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—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 soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/78—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by stacking-plane distances or stacking sequences
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/33—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 soft-magnetic materials mixtures of metallic and non-metallic particles; metallic particles having oxide skin

Definitions

  • Iron oxide and silica containing core-shell particles with improved heating rate Iron oxide and silica containing core-shell particles with improved heating rate
  • the invention relates to iron oxide and silica-containing core-shell particles with improved heating rate in the magnetic field, their preparation and their use.
  • WO03 / 042315 describes the use of iron-silicon oxide particles for inductive heating of adhesive composites.
  • the particles can be obtained either via sol-gel routes or by flame pyrolysis.
  • iron-silicon oxide particles which can be used for inductive heating.
  • the particles have a core-shell structure, with the iron oxide phases hematite, magnetite and maghemite as the core and an amorphous shell of silicon dioxide.
  • the particles are prepared by reacting a mixture of silicon compounds, one of which is a monosilane, and an iron compound in a hydrogen / oxygen flame.
  • EP-A-2000439 discloses doped iron-silicon oxide particles having a core-shell structure, the choice of doping components being limited to those having magnetic properties. In addition, the particles have a fairly high chloride content. The particles are going through
  • iron oxide particles which may be doped with P, Si, Al, Mg, Co, K or Cr. There are no quantities and no information on the
  • the doping serves to influence the particle size and shape. It is not known in which chemical form and at which point of the particle, core and / or shell, the doping component is incorporated.
  • Heating times could be significantly improved, it remains the goal to further reduce the heating times. It was therefore the object of the present invention to provide a material with which this goal can be achieved.
  • the invention relates to core-shell particles whose core magnetic, crystalline iron oxide and the shell contains amorphous silica, wherein a) the shell additionally contains at least one non-magnetic metal oxide or
  • the shell and the core additionally each contain at least one non-magnetic metal oxide.
  • the sum of the proportions of iron oxide, silicon dioxide and nonmagnetic metal oxide is generally at least 98% by weight, preferably at least 99 wt .-%, particularly preferably at least 99.5 wt .-%, each based on the core-shell particles.
  • the nonmagnetic metal oxide is preferably selected from the group consisting of aluminum oxide, calcium oxide, cerium oxide, chromium oxide, copper oxide,
  • both the core and the shell contain nonmagnetic metal oxides
  • the nonmagnetic metal oxide may be the same or different in core and shell.
  • the proportions of non-magnetic metal oxide may be the same or different in core and shell.
  • Metal oxides be the same or different.
  • the non-magnetic metal oxide is present in a proportion of 0.5 to 10 wt .-%, based on the core-shell particles.
  • the distribution of this proportion to the core and the shell is not critical. Particularly preferred is a
  • Embodiment in which the proportion of non-magnetic metal oxide is 1.5 to 7.5% by weight.
  • the proportion of non-magnetic metal oxide in the core and shell is in each case from 0.5 to 5% by weight, based on the core-shell particles.
  • the proportion of silicon dioxide in the core-shell particles according to the invention is preferably 5 to 40 wt .-%, particularly preferably 10 to 20 wt .-%.
  • the amount of silicon dioxide in the shell of the particles according to the invention is preferably from 95 to 99.5% by weight.
  • the particles according to the invention are largely isolated in form
  • the individual particles have a largely spherical to bulbous form.
  • the mean diameter of the individual particles is generally from 5 to 500 nm, preferably from 50 to 200 nm.
  • Noble-shaped particles are not found.
  • three-dimensional aggregates of these particles can also be present. In these aggregates, the individual particles are firmly grown together.
  • the proportion of aggregates is less than 50 wt .-%, preferably less than 20 wt .-%, based on the sum of individual particles and aggregates.
  • the determination can be carried out, for example, by image evaluation of TEM images by means of suitable software, as is already known for other magnetic core-shell particles.
  • the BET surface area of the particles according to the invention is generally 5 to 40 m 2 / g, preferably 10 to 25 m 2 / g.
  • the proportion of silicon dioxide in the core-shell particles according to the invention is preferably from 5 to 40% by weight of silica, more preferably from 8 to 25% by weight and most preferably from 10 to 20% by weight.
  • the proportion of silicon dioxide in the shell is preferably from 70 to 95% by weight, based on the sum of silicon dioxide and metal oxide.
  • the case is a tight shell. Under dense is to understand that with 12 hours contact of the particle with 60 ° C with hydrochloric acid less than 300 ppm iron, hydrogen peroxide less than 10 ppm iron or a NaCl / CaC solution less than 50 ppm iron are detectable.
  • the thickness of the shell is preferably 1 to 40 nm, more preferably 5 to 20 nm. The thickness of the shell can be determined, for example, by evaluating HR-TEM images.
  • the proportion of iron oxide in the core-shell particles of the invention is preferably 60 to 95 wt .-%, more preferably 75 to 90 wt .-% and most preferably 70 to 80 wt .-%.
  • the proportion of iron oxide in the core is preferably 90 to 100 wt .-%, based on the sum of
  • the crystalline iron oxide present in the core of the particles according to the invention may be magnetite, maghemite and hematite
  • Lattice plane spacing of 0.20 nm and 0.29 nm maghemite and magnetite, while the interplanar spacing of 0.25 nm corresponds to maghemite, magnetite and hematite. There are no lattice plane distances detected in the HR-TEM that would have to be assigned to the doping component.
  • the core of the core-shell particles according to the invention preferably has a ratio (magnetite + maghemite) / hematite of 70:30 to 95: 5, particularly preferably 80:20 to 90:10, and a ratio of magnetite / maghemite of preferably 50: 50 to 90:10, more preferably 60:40 to 70:30. With these conditions, the best heating times are achieved.
  • the composition of the core based on maghemite, magnetite and hematite can be determined This can be done by X-ray diffractometry using Co-Ka radiation in an angular range 2 ⁇ of 10 - 100 °.
  • Maghemit is significantly on the basis of the reflexes (1 10) and (21 1) in the front
  • Angular range detectable.
  • the hematite is clearly identifiable because of the freestanding reflexes.
  • the quantitative phase analysis is carried out using the Rietveld method, error about 10% relative.
  • the core-shell particles according to the invention may contain, in a boundary layer between core and shell, one or more compounds containing iron, silicon and oxygen, which in HR-TEM have a spacing of the lattice planes of 0.31 +/- 0.01 nm exhibit.
  • XPS-ESCA X-ray photoelectron spectroscopy
  • TEM-EDX TEM-EDX
  • the core-shell particles according to the invention also have hydroxyl groups on their surface. These can react with inorganic and organic surface modification agents to form a Van der Waals interaction, ionic or covalent bond.
  • Suitable surface modification agents may be, for example
  • Alkoxysilanes carboxylic acids, nucleic acids or polysaccharides.
  • Another object of the invention is a process for the preparation of the core-shell particles in which
  • each one or more iron compounds and metal compounds a12) each one or more iron compounds and metal compounds, a2) one or more hydrogen-containing fuel gases and
  • iron compound, silicon compound and metal compound are oxidizable and / or hydrolyzable.
  • the iron compound and the metal compound are preferably introduced as aerosol in the first zone.
  • the aerosol formation can be carried out in each case from a solution, a dispersion or the substance itself in the form of a liquid in each case using a sputtering gas such as air or nitrogen and a two- or multi-component nozzle. It is also possible to generate the aerosol from a solution containing both the iron compound and the metal compound.
  • the silicon compound and the metal compound may also be introduced into the second zone as an aerosol together or separately. It has also proven to be the silicon compound as vapor in the second zone
  • the mean droplet diameter of the aerosols is preferably less than 100 ⁇ , particularly preferably less than 50 ⁇ .
  • the iron compound used is preferably iron (II) chloride.
  • the silicon compound is preferably selected from the group consisting of SiCl 4 , CH 3 SiCl 3 , (CH 3 ) 2 SiCl 2 , (CH 3 ) 3 SiCl, HSiCl 3 , (CH 3 ) 2 HSiCl and CH 3 C 2 H 5 SiCl 2, H 4 Si, Si (OC 2 H 5 ) 4 and / or Si (OCH 3 ) 4 . Particular preference is given to using SiCl 4 and / or Si (OC 2 H 5 ) 4 .
  • the metal compound is converted to the non-magnetic metal oxide during the process.
  • Suitable metal compounds are especially salts in the form of nitrates, chlorides and octoates, such as 2-ethylhexanoates.
  • organometallic compounds such as alkoxides or Acetylacetonates are used.
  • the metal component is preferably selected from the group consisting of aluminum, calcium, cerium, chromium, copper, magnesium, silver, titanium, tungsten, yttrium, zinc, tin and zirconium.
  • Explicit examples are: aluminum isopropylate, aluminum sec-butoxide, aluminum nitrate, copper nitrate, yttrium nitrate, silver nitrate, zinc nitrate, zirconium nitrate, calcium chloride, magnesium chloride, titanium tetrachloride,
  • Titanium isopropylate, zinc octoate and zirconium octoate Titanium isopropylate, zinc octoate and zirconium octoate.
  • water or steam can additionally be introduced into the second zone.
  • the water or the steam is introduced separately from the silicon compound and the metal compound.
  • a molar excess of water or water vapor is used.
  • Particularly preferred may be a molar ratio of water / silicon compound of 10 to 100.
  • hydrogen, methane, ethane and / or propane can preferably be used. Particularly preferred is hydrogen.
  • the oxygen-containing gas used is mainly air or oxygen-enriched air. As a rule, an excess of oxygen is compared
  • Amount of oxygen is preferably 1, 05 -1, 50th
  • the reaction conditions may preferably be selected so that in the first zone, the mean residence time of 10 ms to 1 s, more preferably 300 to 600 ms, and the temperature preferably 800 to 1300 ° C, more preferably 950 to 1 100 ° C, and in the second zone the mean residence time 0.1 to 10 s, more preferably 1 to 3 seconds and the temperature is preferably 400 to 900 ° C, particularly preferably 700 to 850 ° C, is.
  • the mean residence time 10 ms to 1 s, more preferably 300 to 600 ms, and the temperature preferably 800 to 1300 ° C, more preferably 950 to 1 100 ° C
  • the mean residence time 0.1 to 10 s more preferably 1 to 3 seconds and the temperature is preferably 400 to 900 ° C, particularly preferably 700 to 850 ° C, is.
  • the mean residence time of 10 ms to 1 s, more preferably 300 to 600 ms, and the temperature preferably 800 to 1300 ° C, more preferably 950 to
  • Suitable surface modification agents are organosilanes, silazanes or polysiloxanes. Usually these agents are sprayed onto the core-shell particles and then treated at temperatures of 120 to 200 ° C, preferably under a protective gas atmosphere, over a period of 1 to 5 hours.
  • Another object of the invention is a silicone rubber containing the core-shell particles according to the invention.
  • the proportion of these particles is preferably 0.5 to 15 wt .-% and particularly preferably 3 to 6 wt .-%.
  • Another object of the invention is the use of the
  • Core-shell particles according to the invention as a constituent of
  • Rubber compounds, of polymer preparations, of adhesives, obtained by welding in electromagnetic alternating field Rubber compounds, of polymer preparations, of adhesives, obtained by welding in electromagnetic alternating field
  • the sample was homogenized in the laboratory mill and determined titrimetrically after melt digestion.
  • the Fe (III) content is determined by means of manganometry.
  • the content of Si and the further metal oxide components is determined by means of ICP-OES and
  • the BET surface area is determined according to DIN 66131.
  • the determination of the core components is done by X-ray diffractometry.
  • the thickness of the shell is determined by high-resolution transmission electron microscopy (HR-TEM).
  • the heating time from 20 ° C to 200 ° C is determined in a silicone composition.
  • the silicone composition is obtained by adding 33 g ELASTOSIL® E50, from Momentive Performance Materials, 13 g silicone oil type M 1000, from Momentive Performance Materials, 4 g AEROSIL® 150 from Evonik and 2.5 g, corresponding to 4, 76% by weight, mixed core-shell particles by means of a SpeedMixer 2 ⁇ 30 s and 2 ⁇ 45 s at 3000 U / min. Subsequently, the silicone composition is applied in a thickness of about 1 mm on a glass slide.
  • the energy input is made by induction by means of a water-cooled coil with a diameter of 80 mm.
  • the frequency is 510 KHz, the power about 12 KW, Fives Celes GTMC 25 KW, France.
  • a part of the solution is subsequently analyzed for iron by means of suitable analysis techniques, for example ICP (inductively coupled plasma spectroscopy).
  • ICP inductively coupled plasma spectroscopy
  • Examples 1 to 10 show the preparation of core-shell particles according to the invention, in which both core and shell are non-magnetic
  • Example 1 Figure 1 shows the preparation of core-shell particles according to the invention, in which only the shell contains a nonmagnetic metal oxide.
  • Example 1 An aerosol obtained by atomizing 4500 g / h of an aqueous solution consisting of 26.1 g of iron (II) chloride, 1.3 g of zinc nitrate and 72.6 g of water, in each case per 100 g of solution, and 3.0 kg / h nitrogen are atomized by means of a two-fluid nozzle.
  • an aqueous solution consisting of 26.1 g of iron (II) chloride, 1.3 g of zinc nitrate and 72.6 g of water, in each case per 100 g of solution, and 3.0 kg / h nitrogen are atomized by means of a two-fluid nozzle.
  • the aerosol thus obtained is reacted with 8.8 Nm 3 / h of hydrogen and 19 Nm 3 / h of air, of which 15 Nm 3 / h of primary air and 4 Nm 3 / h of secondary air, in a first zone.
  • the mean residence time of the reaction mixture in the first zone is about 540 ms.
  • the temperature in the first zone is 979 ° C.
  • the mean residence time of the reaction mixture in the second zone is
  • the temperature in the second zone is 808 ° C.
  • reaction mixture is cooled and the resulting solid is deposited on a filter of the gaseous substances.
  • Examples 2 to 1 1 are carried out analogously to Example 1.
  • the starting materials are shown in Table 1.
  • aqueous solutions of the metal compounds are used in the first and second zones.
  • an organometallic compound is used as the metal compound in the second zone.
  • the octoates are used in the form of 2-ethylhexanoates dissolved in 2-ethylhexanoic acid, the content of octoate in the solution in each case being 50 ⁇ 2% by weight.
  • Titanium (IV) isopropylate and aluminum tri-sec-butylate are used as the substance.
  • the starting materials are also shown in Table 1.
  • Table 2 shows the average residence times t and the temperature T in the first and second zones.
  • the physicochemical properties of the core-shell particles are given in Table 3.
  • Example 6 As a comparative example, the powder of Example 6 from EP-A-2000439 is used. This is an iron-silicon mixed oxide powder doped with 1.8% by weight of manganese. The heating time from 20 ° C to 200 ° C is 15 s.
  • Example 10 the powder of Example 10 from WO 2012/048985 is used. This is an iron-silicon mixed oxide powder doped with 1.8% by weight of phosphorus.
  • the heating time from 20 ° C to 200 ° C is 17 s.
  • the core-shell particles of the invention have significantly shorter

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Compounds Of Iron (AREA)

Abstract

L'invention concerne des particules à noyau-enveloppe, dont le noyau contient de l'oxyde de fer cristallin magnétique et dont l'enveloppe contient du dioxyde de silicium amorphe, l'enveloppe contenant en outre au moins un oxyde de métal non magnétique ou l'enveloppe et le noyau contenant en plus respectivement au moins un oxyde de métal non magnétique.
PCT/EP2014/066458 2013-08-07 2014-07-31 Particules à noyau-enveloppe contenant de l'oxyde de fer et du dioxyde de silicium présentant une vitesse de chauffage améliorée WO2015018725A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215498.4A DE102013215498A1 (de) 2013-08-07 2013-08-07 Eisenoxid und Siliciumdioxid enthaltende Kern-Hülle-Partikel mit verbesserter Aufheizgeschwindigkeit
DE102013215498.4 2013-08-07

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Publication Number Publication Date
WO2015018725A1 true WO2015018725A1 (fr) 2015-02-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1243552A1 (fr) * 2001-03-24 2002-09-25 Degussa AG Particules d'oxydes revetus contenant un dopant
EP2000439A1 (fr) * 2007-06-06 2008-12-10 Evonik Degussa GmbH Poudre de mélange d'oxyde silicium/fer
WO2010103974A1 (fr) * 2009-03-12 2010-09-16 ブラザー工業株式会社 Dispositif d'affichage d'image
WO2014023540A1 (fr) * 2012-08-07 2014-02-13 Evonik Industries Ag Particules d'oxyde de fer et de silicium ayant une vitesse d'échauffement améliorée
WO2014037208A1 (fr) * 2012-09-10 2014-03-13 Evonik Industries Ag Mélange de caoutchouc contenant des particules d'oxydes de fer et de silicium avec une vitesse de montée en température améliorée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1444306B1 (fr) 2001-11-13 2007-04-04 Degussa GmbH Assemblages colles durcissables et dissociables
DE102008044384A1 (de) 2008-12-05 2010-06-10 Evonik Degussa Gmbh Eisen-Silicium-Oxidpartikel mit einer Kern-Hülle-Struktur
WO2012048985A1 (fr) 2010-10-15 2012-04-19 Evonik Degussa Gmbh Particules d'oxyde de fer enrobées

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1243552A1 (fr) * 2001-03-24 2002-09-25 Degussa AG Particules d'oxydes revetus contenant un dopant
EP2000439A1 (fr) * 2007-06-06 2008-12-10 Evonik Degussa GmbH Poudre de mélange d'oxyde silicium/fer
WO2010103974A1 (fr) * 2009-03-12 2010-09-16 ブラザー工業株式会社 Dispositif d'affichage d'image
WO2014023540A1 (fr) * 2012-08-07 2014-02-13 Evonik Industries Ag Particules d'oxyde de fer et de silicium ayant une vitesse d'échauffement améliorée
WO2014037208A1 (fr) * 2012-09-10 2014-03-13 Evonik Industries Ag Mélange de caoutchouc contenant des particules d'oxydes de fer et de silicium avec une vitesse de montée en température améliorée

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