WO2006002727A1 - Keramischer formkörper - Google Patents
Keramischer formkörper Download PDFInfo
- Publication number
- WO2006002727A1 WO2006002727A1 PCT/EP2005/006023 EP2005006023W WO2006002727A1 WO 2006002727 A1 WO2006002727 A1 WO 2006002727A1 EP 2005006023 W EP2005006023 W EP 2005006023W WO 2006002727 A1 WO2006002727 A1 WO 2006002727A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaped body
- binder
- body according
- refractory
- offset
- Prior art date
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Classifications
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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
- 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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
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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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/401—Alkaline earth metals
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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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
-
- 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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/424—Carbon black
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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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
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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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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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
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B2235/483—Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
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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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Definitions
- the invention relates to a ceramic molding for refractory applications.
- Refractory ceramic moldings have long been state of the art. They serve, for example, the lining or equipment of furnace installations, for example furnaces, in which metallurgical melts are created or treated.
- the invention relates to the group of moldings produced from an offset containing a chemical binder.
- Such chemically bonded refractory products have different properties depending on the type of chemical binder.
- a binder pitch matrix is formed.
- the secondary carbon formed in this case is responsible for the strength of the product at the operating temperature.
- the formation of the binder pitch matrix is dependent on the presence of aromatic compounds in the starting binder. In the case of coal tar, these are condensed polycyclic aromatic compounds that are considered carcinogenic.
- phosphine is liberated in sulfate-bound materials SO 2 . Both are undesirable.
- Another disadvantage of these binder systems is that the strength is significantly reduced by the decomposition of the sulfate or phosphate and thus, for example, the hot erosion strength decreases.
- the invention is therefore based on the object to display a possibility for producing refractory ceramic molded parts, which gives the corresponding products, especially stones, even at temperatures below the application temperature high strength.
- a binder having a SiO 2 content above 70% by weight in particular a silicone resin.
- any organic ingredients that may be useful to achieve green strength of a molded article are completely removed at temperatures above about 100 ° Celsius.
- the binder is transformed at the same time with a corresponding Thermal treatment (e.g., 100-600 ° C) into a three-dimensional - Si-O network - which binds adjacent particles of the refractory base components to a level significantly above that achieved with known binder systems.
- a very important aspect is that the desired bond is achieved at temperatures well below the sintering temperature, so that it is no longer necessary to burn the moldings before their use (for example in an electric oven). Rather, it is sufficient to anneal the moldings in the specified temperature interval. This saves considerable energy costs.
- the chemical bond is converted into a ceramic compound in the later application, in which the moldings are heated to temperatures above the sintering temperature.
- the special feature of the method mentioned is that the strength curve over the entire temperature range below the sintering temperature is almost constant, namely constant at a consistently high level, for example> 20 N / mm 2 .
- the decrease in strength observed in tar-bound products can be avoided.
- the invention relates to a ceramic molding for refractory applications
- the result is a new product, which is characterized, among other things, in that it is merely tempered (ie not fired) and in which the particles of the refractory components of the matrix material are connected to one another via a SiO 2 bonding scaffold.
- Suitable refractory base materials include, among others, magnesia, for example fused magnesia or sintered magnesia, doloma or mixtures thereof. These are basic substances in each case. Likewise, however, it is also possible to use non-basic refractory components, for example based on aluminum oxide, as a refractory basic component.
- the offset in addition to the usually oxidic refractory base component also contain other components such as silicon carbide and / or metal powder (Al, Si, AlMg, Mg).
- a carbon component preferably in finely divided form, can be present as graphite (for example up to 25% by weight, based on the total offset) and / or in the form of carbon black (for example in a total amount up to 5% by weight, based on the total offset). be used.
- the bonding effect of the binder initiated during the tempering process can be increased with higher SiO 2 contents of the binder, which is why, according to embodiments, at least one binder having an SiO 2 content of more than 75% by weight and, according to a further embodiment, more than 80% by weight is proposed becomes.
- This value is determined by thermogravimetric analysis under oxidizing conditions (DIN 51006).
- Such a silicone resin can be used as a liquid (for example as an aqueous suspension) or as a powder (for example ⁇ 300 ⁇ m).
- the resin is mixed with the refractory base materials and shaped into stones or other bodies in the usual way, for example in presses.
- the resin introduced in solid form melts and distributes evenly between the grains of the refractory matrix.
- the tempering can be carried out or initiated at least partially during mixing or during shaping.
- the binder content can be limited to values of ⁇ 4% by weight or ⁇ 3% by weight.
- the bulk density does not change during the annealing treatment and even at temperatures up to 1,000 ° C. After temperature treatment at 1000 ° Celsius, the product has a high cold compressive strength (> 50 N / mm 2 ). The hot bending strength at 1,400 ° Celsius is also satisfactory.
- the refractory basic component of all offsets consists of enamel magnesia with a grain size of ⁇ 6 mm.
- the offsets contain not only the refractory base component but also graphite, in some cases soot.
- the amount of carbon was chosen so that a residual carbon content of 10.5 wt .-% was achieved in all samples after temperature treatment.
- the binder used in the inventive samples 1, 2 is a silicone resin (3.5 wt .-% active ingredient, based on the above offset), the SiO 2 content (determined according to DIN 51006) is 80 wt .-%, while the Binding of the comparative samples A, B, C by other binder systems (see table) takes place.
- Sample 2 according to the invention additionally contains-like sample C-3% by weight of metallic aluminum (corresponding to 3% by weight less fused magnesia in comparison to the further sample according to the invention).
- Residual carbon content ASTM C831.
- the products of the invention have a high density, which is otherwise achieved only with a pitch bond. Their strength, especially in the temperature range up to 1,000 ° C, is achieved in the prior art only with a synthetic resin bond. However, the products according to the invention are as far as possible free of harmful substances in their preparation and use.
- a pollutant free can be achieved in the prior art only with an offset B (according to DE 42 07 249 Cl). Compared with these known stones, the significantly higher cold-crushing strength and hot bending strength are noticeable.
- Sample A gave a weight loss of 4.6%.
- the weight loss for the sample according to the invention was only 3.2%. This is evidence of the improved oxidation resistance of the products produced according to the invention.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410029752 DE102004029752A1 (de) | 2004-06-19 | 2004-06-19 | Verfahren zur Herstellung eines keramischen Formkörpers |
DE102004029752.5 | 2004-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006002727A1 true WO2006002727A1 (de) | 2006-01-12 |
Family
ID=35501733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/006023 WO2006002727A1 (de) | 2004-06-19 | 2005-06-04 | Keramischer formkörper |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102004029752A1 (de) |
WO (1) | WO2006002727A1 (de) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3804650A (en) * | 1970-06-12 | 1974-04-16 | Corning Glass Works | Silicate binders |
JPS57160957A (en) * | 1981-03-25 | 1982-10-04 | Nippon Steel Corp | Refractories for converter |
JPH03109253A (ja) * | 1989-09-19 | 1991-05-09 | Kawasaki Refract Co Ltd | カーボン含有不焼成れんがの製造方法 |
JPH03118953A (ja) * | 1989-09-29 | 1991-05-21 | Kawasaki Refract Co Ltd | スライディングノズル用プレートれんが |
JPH0421558A (ja) * | 1990-05-12 | 1992-01-24 | Kawasaki Refract Co Ltd | スライディングノズル用プレートれんが |
JPH06135765A (ja) * | 1991-07-18 | 1994-05-17 | Kurosaki Refract Co Ltd | 耐火物の製造方法 |
JPH06172020A (ja) * | 1992-12-07 | 1994-06-21 | Kurosaki Refract Co Ltd | マグネシア成分を含む耐火材料 |
DE4336269A1 (de) * | 1993-10-23 | 1995-04-27 | Veitsch Radex Ag | Feuerfeste keramische Masse und deren Verwendung |
US5807798A (en) * | 1996-12-20 | 1998-09-15 | E. I. Du Pont De Nemours And Company | Refractory compositions for use in fluid bed chlorinators |
JP2000103682A (ja) * | 1998-09-29 | 2000-04-11 | Kurosaki Refract Co Ltd | スライディングノズル装置用れんが |
US20040249038A1 (en) * | 2001-10-15 | 2004-12-09 | Airy-Pierre Lamaze | Coating precursor and method for coating a substrate with a refractory layer |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HUT71991A (en) * | 1992-03-08 | 1996-03-28 | Veitsch Radex Ag | Process for producing fireproof compounds and fireproof moulding from this compounds |
DE19828257A1 (de) * | 1998-06-25 | 1999-12-30 | Bayer Ag | Werkstoffe zur Konstruktion und Isolation, ein Verfahren zur Herstellung und deren Verwendung sowie ein Bindemittel zur Herstellung von Werkstoffen |
-
2004
- 2004-06-19 DE DE200410029752 patent/DE102004029752A1/de not_active Ceased
-
2005
- 2005-06-04 WO PCT/EP2005/006023 patent/WO2006002727A1/de active Application Filing
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3804650A (en) * | 1970-06-12 | 1974-04-16 | Corning Glass Works | Silicate binders |
JPS57160957A (en) * | 1981-03-25 | 1982-10-04 | Nippon Steel Corp | Refractories for converter |
JPH03109253A (ja) * | 1989-09-19 | 1991-05-09 | Kawasaki Refract Co Ltd | カーボン含有不焼成れんがの製造方法 |
JPH03118953A (ja) * | 1989-09-29 | 1991-05-21 | Kawasaki Refract Co Ltd | スライディングノズル用プレートれんが |
JPH0421558A (ja) * | 1990-05-12 | 1992-01-24 | Kawasaki Refract Co Ltd | スライディングノズル用プレートれんが |
JPH06135765A (ja) * | 1991-07-18 | 1994-05-17 | Kurosaki Refract Co Ltd | 耐火物の製造方法 |
JPH06172020A (ja) * | 1992-12-07 | 1994-06-21 | Kurosaki Refract Co Ltd | マグネシア成分を含む耐火材料 |
DE4336269A1 (de) * | 1993-10-23 | 1995-04-27 | Veitsch Radex Ag | Feuerfeste keramische Masse und deren Verwendung |
US5807798A (en) * | 1996-12-20 | 1998-09-15 | E. I. Du Pont De Nemours And Company | Refractory compositions for use in fluid bed chlorinators |
JP2000103682A (ja) * | 1998-09-29 | 2000-04-11 | Kurosaki Refract Co Ltd | スライディングノズル装置用れんが |
US20040249038A1 (en) * | 2001-10-15 | 2004-12-09 | Airy-Pierre Lamaze | Coating precursor and method for coating a substrate with a refractory layer |
Non-Patent Citations (8)
Title |
---|
ARTIKEL VON J.ULBRICHT ET AL: "Seiten 51-58;", May 2005, XV. CONFERENCE ON REFRACTORY CASTABLES, PRAQUE, XP002344949 * |
DATABASE WPI Section Ch Week 198245, Derwent World Patents Index; Class L02, AN 1982-96506E, XP002345007 * |
PATENT ABSTRACTS OF JAPAN vol. 015, no. 297 (C - 0854) 29 July 1991 (1991-07-29) * |
PATENT ABSTRACTS OF JAPAN vol. 015, no. 318 (M - 1146) 14 August 1991 (1991-08-14) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 180 (C - 0935) 30 April 1992 (1992-04-30) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 437 (C - 1238) 16 August 1994 (1994-08-16) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 506 (C - 1252) 22 September 1994 (1994-09-22) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07 29 September 2000 (2000-09-29) * |
Also Published As
Publication number | Publication date |
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DE102004029752A1 (de) | 2006-01-12 |
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