DE202008007224U1 - Filter device for removing particles from a gas stream - Google Patents
Filter device for removing particles from a gas stream Download PDFInfo
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- DE202008007224U1 DE202008007224U1 DE202008007224U DE202008007224U DE202008007224U1 DE 202008007224 U1 DE202008007224 U1 DE 202008007224U1 DE 202008007224 U DE202008007224 U DE 202008007224U DE 202008007224 U DE202008007224 U DE 202008007224U DE 202008007224 U1 DE202008007224 U1 DE 202008007224U1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/478—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on aluminium titanates
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
- C04B2235/3248—Zirconates or hafnates, e.g. zircon
- C04B2235/3249—Zirconates or hafnates, e.g. zircon containing also titanium oxide or titanates, e.g. lead zirconate titanate (PZT)
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
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Abstract
Filtereinrichtung (14) zur Entfernung von Partikeln aus einem Gasstrom, insbesondere von Partikeln aus einem Abgasstrom einer Verbrennungskraftmaschine, mit einem Filterelement (18), wobei das Filterelement aus Aluminiumtitanat besteht, dem eine Mineralphase zugegeben ist, dadurch gekennzeichnet, dass die Mineralphase aus Alkalifeldspäten und Mullit und/oder Spinellen und/oder Zirkontitanat besteht.Filter device (14) for removing particles from a gas stream, in particular particles from an exhaust gas stream of an internal combustion engine, with a filter element (18), wherein the filter element consists of aluminum titanate to which a mineral phase is added, characterized in that the mineral phase of alkali feldspar and Mullite and / or spinels and / or zirconium titanate exists.
Description
Technisches GebietTechnical area
Die Erfindung betrifft allgemein eine Filtereinrichtung zur Entfernung von Partikeln aus einem Gasstrom. Insbesondere betrifft die Erfindung eine solche Filtereinrichtung zur Entfernung von Rußpartikeln aus einem Abgasstrom einer Brennkraftmaschine. Ganz speziell betrifft die Erfindung eine solche Filtereinrichtung auf der Basis von Aluminiumtitanat.The The invention generally relates to a filter device for removal of particles from a gas stream. In particular, the invention relates Such a filter device for removing soot particles from an exhaust gas stream of an internal combustion engine. Especially concerned the invention such a filter device based on aluminum titanate.
Derartige Filter werden zum Beispiel bei der Abgasnachbehandlung selbstentzündender Verbrennungskraftmaschinen, insbesondere in dieselbetriebenen Kraftfahrzeugen eingesetzt. Üblicherweise sind solche Filter aus einem keramischen Material, zum Beispiel Cordierit oder Siliziumcarbid gefertigt. Keramische Körper aus Cordierit finden Verwendung in einer Vielzahl von Hochtemperatur-Anwendungen, wie zum Beispiel katalytischen Konvertern, NOx-Adsorbern, elektrisch geheizten Katalysatoren, chemischen Prozesssubstraten und eben auch Dieselpartikelfilter.Such filters are used, for example, in the exhaust gas aftertreatment of self-igniting internal combustion engines, in particular in diesel-powered motor vehicles. Usually, such filters are made of a ceramic material, for example cordierite or silicon carbide. Cordierite ceramic bodies are used in a variety of high temperature applications, such as catalytic converters, NO x adsorbers, electrically heated catalysts, chemical process substrates, and even diesel particulate filters.
Bei der Filtration von Dieselabgasen war Cordierit als kostengünstiges Material, das einen niedrigen thermischen Ausdehnungskoeffizienten aufweist, lange das Material der Wahl. Poröse Cordierit-Keramikfilter wurden in Form von Wandflussfiltern seit den frühen 80er Jahren zur Entfernung von Partikeln im Abgasstrom von Dieselmotoren verwendet.at The filtration of diesel exhaust was cordierite as cost effective Material that has a low thermal expansion coefficient, long the material of choice. Porous cordierite ceramic filter have been in the form of Wandflussfiltern since the early 80s Years to remove particles in the exhaust stream of diesel engines used.
Wandflussfilter besitzen in der Regel eine zylindrische Form mit zwei Stirnflächen und einer Mantelfläche und werden von der ersten Stirnfläche zur zweiten Stirnfläche von einer Vielzahl von im Wesentlichen parallel zur Zylinderachse liegenden Strömungskanälen für die Abgase von Dieselmotoren durchzogen. Die Querschnittsform der Wandflussfilter hängt von den Einbauerfordernissen am Kraftfahrzeug ab. Weit verbreitet sind Filterkörper mit rundem, elliptischem oder dreiecksförmigem Querschnitt. Die Strömungskanäle weisen meist einen quadratischen oder hexagonalen Querschnitt auf und sind in einem engen Raster über den gesamten Querschnitt der Filterkörper angeordnet.Wall-flow filter usually have a cylindrical shape with two end faces and a lateral surface and are from the first end face to the second end face of a plurality of substantially parallel to the cylinder axis lying flow channels traversed by the exhaust gases of diesel engines. The cross-sectional shape the wall flow filter depends on the installation requirements on the motor vehicle. Widely used are filter bodies with a round, elliptical or triangular cross-section. The flow channels usually have a square or hexagonal cross section and are in a tight grid over arranged the entire cross section of the filter body.
Ein Dieselpartikelfilter (DPF) vereint idealerweise einen niedrigen thermischen Ausdehnungskoeffizienten, einen geringen Druckabfall, hohe Festigkeit und geringe Kosten. Probleme, die bei der Verwendung von Cordierit auftauchen können, umfassen sowohl eine niedrige volumetrische Wärmekapazität und niedrige thermische Leitfähigkeit, was zu nicht akzeptablen hohen Temperaturen oder Temperaturspitzen während des Betriebs führen kann, als auch eine geringe thermische Beständigkeit. Des weiteren können im Dieselabgas vorhandene anorganische Partikel mit dem Cordierit reagieren und Filterausfälle hervorrufen.One Diesel Particulate Filter (DPF) ideally combines a low one coefficient of thermal expansion, a low pressure drop, high strength and low cost. Problems in use of cordierite may include both a low one volumetric heat capacity and low thermal Conductivity, resulting in unacceptable high temperatures or temperature peaks during operation can, as well as a low thermal resistance. Furthermore can be present in diesel exhaust inorganic particles react with the cordierite and cause filter failures.
Ein alternatives Material zu Cordierit bei der Herstellung von Diesel-Partikelfiltern ist Siliciumcarbid (SiC). Obwohl dieses Material sowohl eine hohe volumetrische Wärmekapazität als auch eine hohe thermische Leit fähigkeit aufweist, besitzt es, als Ergebnis einer relativ hohen Wärmeausdehnung und eines hohen Elastizitätsmoduls auch eine schlechte Temperaturwechselbeständigkeit. Dies macht es notwendig, SiC-Filter zu segmentieren, um bei der Verwendung Ausfälle zu verhindern. Auch resultieren die Verarbeitungserfordernisse (d. h., hohe Temperaturen, Inertatmosphäre und Segmentation) in hohen Herstellungskosten.One alternative material to cordierite in the manufacture of diesel particulate filters is silicon carbide (SiC). Although this material is both a high volumetric Heat capacity as well as a high thermal conductivity it has, as a result, a relatively high thermal expansion and a high modulus of elasticity also a poor thermal shock resistance. This makes it necessary to segment SiC filters to be used in the Use to prevent failures. Also, the processing requirements result (i.e., high temperatures, inert atmosphere, and segmentation) in high production costs.
In neuerer Zeit sind keramische Filterelemente auf der Basis von Aluminiumtitanat bekannt geworden, die geeignete Eigenschaften zur Anwendung bei hohen Temperaturen, wie z. B. Fahrzeug-Abgaskontrolle und Dieselabgas-Nachbehandlungssysteme wie DPFs, aufweisen. Aluminiumtitanat ist die stöchiometrische Mischphase von Aluminiumoxid und Titandioxid. Es zeichnet sich aus durch eine niedrige Wärmeleitfähigkeit, einen sehr niedrigen Wärmeausdehnungskoeffizienten und eine damit verbundene sehr hohe Temperaturwechselbeständigkeit.In More recently, ceramic filter elements are based on aluminum titanate become known, the appropriate properties for use in high temperatures, such. B. vehicle exhaust control and diesel exhaust aftertreatment systems like DPFs. Aluminum titanate is the stoichiometric Mixed phase of alumina and titania. It stands out through a low thermal conductivity, a very low thermal expansion coefficient and one with it associated very high thermal shock resistance.
Stand der TechnikState of the art
Aus
Die
Schließlich
offenbart die
Der Erfindung liegt die Aufgabe zugrunde, ein Filter zur Entfernung von Partikeln aus einem Gasstrom, insbesondere ein Dieselpartikelfilter auf der Basis von Aluminiumtitanat bereit zu stellen, das bei höheren Temperaturen einsetzbar ist, und bei dem eine bessere Beeinflussung der Materialeigenschaften möglich ist und die Gefügeeigenschaften gut einstellbar sind. Weitere Aufgaben liegen in der Bereitstellung einer höheren mechanischen Festigkeit und einer niedrigeren Wärmedehnung.Of the Invention is based on the object, a filter for removal of particles from a gas stream, in particular a diesel particulate filter on the basis of aluminum titanate to provide at higher Temperatures can be used, and in which a better influence the material properties is possible and the structural properties are good are adjustable. Other tasks are in the provision a higher mechanical strength and a lower Thermal expansion.
Offenbarung der ErfindungDisclosure of the invention
Die vorliegende Erfindung löst diese Aufgabe durch Bereitstellen eines Filters zur Entfernung von Partikeln aus einem Gasstrom, insbesondere von Partikeln aus einem Abgasstrom einer Verbrennungskraftmaschine, wobei der Filter aus Aluminiumtitanat besteht, dem eine Mineralphase zugegeben ist, und die Mineralphase aus Alkalifeldspäten und Mullit und/oder Spinellen und/oder Zirkontitanat besteht. Optional kann das Filterelement zusätzlich eine Glasphase von < 5 Gew.-% enthalten.The The present invention solves this problem by providing a filter for removing particles from a gas stream, in particular of Particles from an exhaust stream of an internal combustion engine, wherein the filter is made of aluminum titanate, which is a mineral phase is added, and the mineral phase of Alkalifeldspäten and mullite and / or spinels and / or zirconium titanate. optional the filter element may additionally contain a glass phase of <5 wt .-%.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die einzige Figur zeigt eine schematische Darstellung einer Verbrennungskraftmaschine mit einer erfindungsgemäßen Filtereinrichtung.The single figure shows a schematic representation of an internal combustion engine with a filter device according to the invention.
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
Die
Figur zeigt eine schematische Darstellung einer Verbrennungskraftmaschine
mit einer erfindungsgemäßen Filtereinrichtung.
Die Verbrennungskraftmaschine
Die
Filtereinrichtung
Bisher wurden bei Dieselpartikelfiltern auf Aluminiumtitanatbasis ausschließlich Calcium-, Barium- und Strontium-Feldspäte als zusätzliche Phasen und eine Glasphase in einer Menge von > 5 Gew.-% verwendet. Die erfindungsgemäß verwendeten Feldspäte bieten geeignetere Werkstoffeigenschaften im Hinblick auf das Wärmeausdehnungsverhalten und die Lebensdauer des Filters. Gleichzeitig sind nur sehr geringe Mengen an Glasphase im Gefüge vorhanden (< 5 Gew.-%), was zu einem wesentlich verbesserten Wärmedehnungsverhalten führt. Die Wärmekapazität ist durch diese Kombination der Rohstoffe beeinflussbar.So far were exclusive to aluminum titanate based diesel particulate filters Calcium, barium and strontium feldspars as additional Phases and a glass phase in an amount of> 5 wt .-% used. The inventively used Feldspäte offer more suitable material properties with regard to on the thermal expansion behavior and the life of the Filter. At the same time, only very small amounts of glass phase present in the structure (<5 Wt .-%), resulting in a significantly improved thermal expansion behavior leads. The heat capacity is through this Combination of raw materials influenced.
Aus den verwendeten Feldspäten lassen sich gezielt verschiedene Mineralphasen erzeugen, was mit den herkömmlichen Barium-, Calcium- und Strontiumfeldspäten nicht gelingt. Diese werden als Einzelkomponenten (Barium-, Calcium-, Strontiumverbindungen, Al2O3 und SiO2 oder andere Al2O3- bzw. SiO2-haltige Verbindungen), meist als Oxide oder Carbonate, zugeführt und reagieren dann während des Sinterns zu den Feldspäten. Bei den erfindungsgemäßen Lithium-, Natrium- und Kaliumfeldspäten findet diese Reaktion aus den Einzelkomponenten nicht statt. Es besteht die Möglichkeit, direkt Feldspäte einzusetzen oder Einzelkomponenten zu verwenden, welche über den Zwischenschritt einer Glasphase zu den geforderten Mineralphasen gesintert werden. Diese Variante bietet die Möglichkeit, Gefüge und Werkstoffeigenschaften gezielt einzustellen, da das Verhältnis Glasphase; entstehende Mineralphase, sowie Mineralart, Mineralzusammensetzung und damit Eigenschaften wie Wärmedehnung in einem bereich von 0–2 × 10–6 Km–1 oder die Wärmekapazität verändert werden können.From the feldspars used, it is possible to generate different mineral phases, which is not possible with the conventional barium, calcium and strontium feldspars. These are supplied as individual components (barium, calcium, strontium compounds, Al 2 O 3 and SiO 2 or other Al 2 O 3 or SiO 2 -containing compounds), usually as oxides or carbonates, and then react during sintering the feldspars. In the case of the lithium, sodium and potassium feldspars according to the invention, this reaction does not take place from the individual components. It is possible to use feldspars directly or to use individual components which are sintered via the intermediate step of a glass phase to the required mineral phases. This variant offers the possibility of selectively adjusting microstructures and material properties, since the ratio glass phase; resultant mineral phase, as well as mineral species, mineral composition and properties such as thermal expansion of 0-2 × 10 -6 km -1 or the heat capacity can be changed in a range.
Spinelle verbessern die mechanischen Eigenschaften speziell der Festigkeit. Aluminiumtitanat-Spinell-Werkstoffe eignen sich für den Einsatz bei sehr hohen Temperaturen. Außerdem lassen sich gezielt Gefügeeigenschalten beeinflussen. Spinelle besitzen als Werkstoffe eine hohe mechanische Festigkeit. Durch geeignete Sinterbedingungen kann der Spinell als Zusatz die Festigkeit in anderen Werkstoffen erhöhen. Dies geschieht durch Einstellung der Sinterbedingungen, die das Wachstum von Kristallnadeln erzeugt. Dies wiederum führt zu einer Verfilzung des Gefüges, was die Festigkeit erhöhen kann.Spinels improve the mechanical properties especially of the strength. Aluminum titanate spinel materials are suitable for use at very high temperatures. In addition, you can specifically influence structural self-switching. Spinels have a high mechanical strength as materials. By suitable sintering conditions, the spinel can increase the strength in other materials as an additive. This is done by adjusting the sintering conditions, which generates the growth of crystal needles. This in turn leads to a felting of the structure, which can increase the strength.
In einer ersten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 35–90 Gew.-% Aluminiumtitanat; 1–60 Gew.-% Mineralphase. Die Mineralphase besteht dabei aus einem oder mehreren der folgenden Stoffe in den angegebenen Mengenverhältnissen: 10–80 Gew.-% Mullit; 0–80 Gew.-% Zirkontitanat; 0–50 Gew.-% Alkalifeldspäte und 0–80 Gew.-% Spinelle.In In a first embodiment, the filter element comprises the following composition: 35-90% by weight of aluminum titanate; 1-60 wt .-% mineral phase. The mineral phase exists from one or more of the following substances as indicated Proportions: 10-80% by weight of mullite; 0-80 % By weight zirconium titanate; 0-50% by weight alkali feldspars and 0-80 wt% spinels.
In einer zweiten Ausführungsform kann das Filterelement zusätzlich eine Glasphase in einer Menge von <5 Gew.-% aufweisen.In In a second embodiment, the filter element can additionally a glass phase in an amount of <5 % By weight.
Die erfindungsgemäß vorhandenen Feldspäte sind ausgewählt aus der Gruppe bestehend aus Lithium-, Natrium-, Kaliumfeldspat. Außerdem kann das Filterelement Zirkontitanat enthalten.The Inventive feldspars according to the invention are selected from the group consisting of lithium, Sodium, potassium feldspar. In addition, the filter element Containing zirconium titanate.
Das Gefüge kann auch zwei oder mehr Mineralphasen enthalten. In diesem Fall kann auf die Glasphase verzichtet werden. Werden Mineralpha sen eingesetzt, die das gesamte ATi-Gefüge stabilisieren und gleichzeitig niedrige Wärmedehnung haben, so kann auf die Glasphase vollständig verzichtet werden, da diese aufgrund höherer Wärmedehnung von Nachteil für das Gefüge wäre.The Structure can also contain two or more mineral phases. In this case, can be dispensed with the glass phase. Become Mineral phases are used, which stabilize the entire ATi microstructure and at the same time have low thermal expansion, so on the glass phase are completely dispensed with as this is due to higher thermal expansion of disadvantage for the structure would be.
Die erfindungsgemäße Filtereinrichtung besteht aus einem temperaturbeständigen Material und ist daher für den Einsatz als Dieselpartikelfilter geeignet. Durch die Auswahl der erfindungsgemäßen Mineralphase lassen sich die Materialeigenschaften besser beeinflussen und die Gefügeeigenschalten besser einstellen. Die erfindungsgemäße Filtereinrichtung zeigt eine gute Temperaturwechselbeständigkeit und eine niedrige Wärmeausdehnung.The Filter device according to the invention consists of a temperature resistant material and is therefore for suitable for use as a diesel particulate filter. By selection the mineral phase of the invention can be better influence the material properties and the structural properties are better to adjust. The filter device according to the invention shows a good thermal shock resistance and a low thermal expansion.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 60217084 T2 [0008] - DE 60217084 T2 [0008]
- - DE 102006040739 A1 [0009] DE 102006040739 A1 [0009]
- - WO 2005/046840 [0010] WO 2005/046840 [0010]
Claims (10)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202008007224U DE202008007224U1 (en) | 2008-05-29 | 2008-05-29 | Filter device for removing particles from a gas stream |
PCT/EP2009/056495 WO2009144262A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from a gas stream |
PCT/EP2009/056493 WO2009144260A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from flowing gas |
PCT/EP2009/056494 WO2009144261A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from a gas stream |
EP09753917A EP2300392A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from a gas stream |
EP09753915A EP2291340A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from flowing gas |
EP09753916A EP2291339A1 (en) | 2008-05-29 | 2009-05-28 | Filter device for removing particles from a gas stream |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202008007224U DE202008007224U1 (en) | 2008-05-29 | 2008-05-29 | Filter device for removing particles from a gas stream |
Publications (1)
Publication Number | Publication Date |
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DE202008007224U1 true DE202008007224U1 (en) | 2009-10-29 |
Family
ID=41254266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202008007224U Expired - Lifetime DE202008007224U1 (en) | 2008-05-29 | 2008-05-29 | Filter device for removing particles from a gas stream |
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DE (1) | DE202008007224U1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015144909A1 (en) * | 2014-03-28 | 2015-10-01 | Imerys | Ceramic structures |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0210813A2 (en) * | 1985-07-22 | 1987-02-04 | Ngk Insulators, Ltd. | Aluminum titanate.-mullite base ceramics |
WO2005046840A1 (en) | 2003-11-04 | 2005-05-26 | Corning Incorporated | Ceramic body based on aluminum titanate |
DE102005027649A1 (en) * | 2005-06-15 | 2006-12-21 | Robert Bosch Gmbh | Exhaust after-treatment arrangement and method for producing an exhaust aftertreatment arrangement |
DE102006035052A1 (en) * | 2005-11-17 | 2007-05-24 | Robert Bosch Gmbh | Filter element and filter for exhaust aftertreatment |
DE60217084T2 (en) | 2001-04-03 | 2007-07-12 | Ngk Insulators, Ltd., Nagoya | WAVE STRUCTURE AND ITS ARRANGEMENT |
DE102006040739A1 (en) | 2006-08-31 | 2008-03-06 | Robert Bosch Gmbh | Filter for the removal of particles from a gas stream and process for its preparation |
DE602004011997T2 (en) * | 2003-06-05 | 2009-02-26 | Ibiden Co., Ltd., Ogaki | HONEYCOMB BODY STRUCTURE |
EP1484482B1 (en) * | 2002-03-13 | 2009-04-15 | Ngk Insulators, Ltd. | Exhaust gas purifying filter |
-
2008
- 2008-05-29 DE DE202008007224U patent/DE202008007224U1/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0210813A2 (en) * | 1985-07-22 | 1987-02-04 | Ngk Insulators, Ltd. | Aluminum titanate.-mullite base ceramics |
DE60217084T2 (en) | 2001-04-03 | 2007-07-12 | Ngk Insulators, Ltd., Nagoya | WAVE STRUCTURE AND ITS ARRANGEMENT |
EP1484482B1 (en) * | 2002-03-13 | 2009-04-15 | Ngk Insulators, Ltd. | Exhaust gas purifying filter |
DE602004011997T2 (en) * | 2003-06-05 | 2009-02-26 | Ibiden Co., Ltd., Ogaki | HONEYCOMB BODY STRUCTURE |
WO2005046840A1 (en) | 2003-11-04 | 2005-05-26 | Corning Incorporated | Ceramic body based on aluminum titanate |
DE102005027649A1 (en) * | 2005-06-15 | 2006-12-21 | Robert Bosch Gmbh | Exhaust after-treatment arrangement and method for producing an exhaust aftertreatment arrangement |
DE102006035052A1 (en) * | 2005-11-17 | 2007-05-24 | Robert Bosch Gmbh | Filter element and filter for exhaust aftertreatment |
DE102006040739A1 (en) | 2006-08-31 | 2008-03-06 | Robert Bosch Gmbh | Filter for the removal of particles from a gas stream and process for its preparation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015144909A1 (en) * | 2014-03-28 | 2015-10-01 | Imerys | Ceramic structures |
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