WO2003066784A1 - Blended pitch/coal based carbon foams - Google Patents
Blended pitch/coal based carbon foams Download PDFInfo
- Publication number
- WO2003066784A1 WO2003066784A1 PCT/US2003/003218 US0303218W WO03066784A1 WO 2003066784 A1 WO2003066784 A1 WO 2003066784A1 US 0303218 W US0303218 W US 0303218W WO 03066784 A1 WO03066784 A1 WO 03066784A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bituminous coal
- high volatile
- carbon foam
- volatile bituminous
- coal
- Prior art date
Links
Classifications
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
Definitions
- the present invention relates to low density, high strength carbon foams prepared by the controlled foaming of petroleum pitch and coal particulate blends.
- 09/902,828 filed July 7, 2001 describes coal-based cellular or porous products having a density of preferably between about 0.1 g/cm 3 and about 0.8 g/cm 3 that are produced by the controlled heating of coal particulate preferably up to V* inch in diameter in a "mold" and under a non-oxidizing atmosphere.
- the starting material coal has a free swell index as determined by aforementioned ASTM D720 test of between about 3.5 and about 5.0.
- the porous product thereby produced preferably as a net shape or near net shape, can be machined, adhered and otherwise fabricated to produce a wide variety of low cost, low density products, or used in its preformed shape as a filter, heat or electrical insulator etc.
- Such cellular products without further treatment and/or the addition of strengthening additives have been shown to exhibit compressive strengths of up to about 4000 psi. Impregnation with appropriate materials or the incorporation of various strength improving additives can further increase the compressive, tensile and other properties of these cellular materials. Further treatment by carbonization or graphitization yields cellular products that can be used as electrical or heat conductors.
- carbon foams are produced largely in accordance with the methods described in foregoing U.S. Patent Application Serial No. 09/902,828, but with starting materials that comprise from about 10 to about 90% by weight of ground petroleum pitch and from about 90 to about 10% by weight of bituminous coal particulate exhibiting a free swell index of from about 3.5 to about 5.0.
- the relatively lower melting point of the petroleum coke permits this material to flow about the coal particulate thereby encapsulating the coal particulate prior to the onset of the foaming of the coal particulate thereby permitting the production of carbon foams that exhibit larger bubble or cell sizes and consequently are of lower density than those conventionally produced in accordance with solely coal particulate starting materials.
- the presence of the petroleum pitch permits the fabrication of carbon foams exhibiting enhanced thermal conductivity.
- the blending of varying relative amounts of petroleum pitch and coal particulate in the carbon foam production process permits the formulation of custom carbon foams that exhibit the appropriate balances between strength, as provided by the coal particulate, and thermal conductivity, as provided by the petroleum pitch in the starting material.
- a preformed, low density, i.e., from about 0.1 to about 0.5 g/cm 3 , and preferably from about 0.1 to about 0.4 g/cm 3 , cellular product is produced from a blend of a powdered coal particulate preferably less than about V* inch in diameter blended with from about 10 to about 90 weight percent of ground petroleum pitch (also preferably of a particle size of less than about l A inch in diameter) by the controlled heating of the powdered coal/petroleum pitch blend in a "mold" under a non-oxidizing atmosphere.
- the starting material coal may include bitumen, anthracite, or even lignite, or blends of these coals that exhibit a "free swell index" as determined by ASTM D720 of between about 3.5 and about 5.0, and preferably between about 3.75 and 4.5, but are preferably bituminous, agglomerating coals that have been comminuted to an appropriate particle size, preferably to a fine powder below about -60 to -80 mesh.
- the most preferred coal starting materials are so- called '"high volatile" bituminous coals as described below.
- the starting material coal exhibits one or more and preferably all of the following set of properties: 1) a volatile matter content (dry, ash-free basis) of between about 35 and about 35% as defined by ASTM D3175, "Test Method for Volatile Matter in the Analysis of Coal and Coke", so-called “high volatile” coals; 2) a fixed carbon (dry basis) between about 50 and about 60% as defined by ASTM D3172, “Practice for Proximate Analysis of Coal and Coke”; 3) a Gieseler initial softening temperature of between about 380°C and about 400°C as determined by ASTM D2639, Test Method for Plastic Properties of Coal by the Constant-Torque Gieseler Plastometer”; 4) a plastic temperature range above about 50° C as determined by ASTM D2639; 5) a maximum fluidity of at least 300 ddpm (dial divisions per minute) and preferably greater than about 2000 ddpm as determined by ASTM D2639; 6)
- the low softening point (380-400°C) is important so that the material softens and is . plastic before volatahzation and coking occur.
- the large plastic working range or “plastic range” is important in that it allows the coal to flow plastically while losing mass due to volatahzation and coking.
- Vitrinite reflectance, fixed carbon content and volatile matter content are important in classifying these coal starting materials as "high- volatile" bituminous coals that provide optimum results in the process of the present invention and thus, carbon foam materials that exhibit an optimum combination of properties when prepared in accordance with the process described and claimed herein. The presence of oxidation tends to hinder fluidity and consequently, foam formation.
- a coal particulate starting material characterized as a high- volatile bituminous coal containing from about 35%o to about 45%> by weight (dry, ash-free basis) volatile matter, as defined by ASTM D3175, is a basic requirement for obtaining optimum results in the form of optimum carbon foaming in accordance with the process of the present invention.
- the various parameters derived from the Gieseler plasticity evaluations form the second highly important set of characteristics of the starting material coal if optimum results are to be obtained.
- a softening point in the range of from about 380°C and about 400°C, a plastic range of at least about 50°C and preferably between about 75 and 100°C, and a maximum fluidity of at least several hundred and preferably greater than 2000 ddpm(dial divisions per minute) are highly important to the successful optimized practice of the present invention. Accordingly, in order to obtain the carbon foams exhibiting the superior properties described herein, it is important that the coal starting material be a high volatile bituminous coal having a softening point as just described and a plastic range on the order of above about 50°C all with the indicated Gieseler fluidity values described.
- Coals having free swell indices below these preferred ranges may not agglomerate properly leaving a powder mass or sinter even in the presence of the petroleum pitch, but not swell or foam, white coals exhibiting free swell indices above these preferred ranges may heave upon foaming and collapsed upon themselves leaving a dense compact.
- the petroleum pitch may be any suitable petroleum pitch that exhibits a melting point below that of the previously described particulate coal, i. e. generally between about 50 and about 300°C, and which will undergo foaming when subjected to the treatment conditions described hereinafter for the foaming of the coal/petroleum pitch blend.
- the petroleum pitch is similarly ground to a relatively fine particulate below about l ⁇ inch and blended with the coal particulate prior to the onset of processing to form the carbon foams of the present invention.
- the carbon foams described herein are semi-crystalline or more accurately turbostratically-ordered and largely isotropic i.e., demonstrating physical properties that are approximately equal in all directions.
- the cellular coal-based products of the present invention typically exhibit pore sizes on the order of 300 ⁇ or greater, although pore sizes of up to 500/x and greater are possible within the operating parameters of the process described.
- the thermal conductivities of the cellular coal-based products are generally greater than about 1.0 W/m/°K.
- the carbon foams of the present invention demonstrate compressive strengths on the order of from about 2000 to about 6000 psi at densities of from about 0.4 to about 0.5 g/cm 3 .
- the coal starting material exhibit the previously specified free swell index of between about 3.5 and about 5.0 and preferably between about 3.75 and about 4.5. Impregnation with appropriate materials or the incorporation of various strength improving additives can further increase the compressive, tensile and other properties of these cellular materials. Further treatment by carbonization or graphitization yields cellular products that can be used as electrical or heat conductors.
- the production method of the present invention comprises: 1) blending coal particulate and petroleum pitch particulate to form a coal particulate/ petroleum pitch particulate blend comprising from about 10 to about 90 weight percent petroleum pitch and the balance coal particulate each particulate being of preferably small size, i.e., less than about VA inch particles; 2) heating the coal particulate/petroleum pitch particulate blend to a temperature adequate to permit the petroleum pitch particulate to soften and "encapsulate' the coal particulate to form a "green blend", generally this temperature is between about 50 and 300°C and the time required for "encapsulation" is on the order of several minutes once softening occurs; 3) heating the "green blend" in a "mold” and under a non-oxidizing atmosphere at a heat up rate of from about 1 to about 20°C to a temperature of between about 300 and about 700°C; 4) soaking at a temperature of between about 300 and 700°C for from about 10 minutes up to about 12 hours to form a "green foam";
- the non-oxidizing atmosphere may be provided by the introduction of inert or non-oxidizing gas into the "mold" at a pressure of from about 0 psi, i.e., free flowing gas, up to about 500 psi.
- the inert gas used may be any of the commonly used inert or non-oxidizing gases such as nitrogen, helium, argon, C0 2 , etc.
- Blending of the coal and petroleum pitch particulates can be obtained using any conventional blending apparatus of the type generally applied in the art to obtain uniform blends of particulate materials.
- "Encapsulation” or the treatment of the coal/petroleum pitch particulate blend to achieve surrounding of the coal particulate with a "film” of softened petroleum pitch that softens at a temperature below that required for the onset of expansion is performed at a temperature within the softening range of the petroleum pitch. This is generally at a temperature of between about 50 and about 300°C depending upon the particular petroleum pitch utilized. Since at these temperatures, no expansion or foaming will have initiated, the heat up rate is not particularly critical.
- the period of soaking or retention of the particulate blend at or somewhat above the softening temperature of the petroleum pitch is similarly not of critical importance, so long as the "film" of softened petroleum pitch encapsulates the coal particulate. This will generally occur in a matter of minutes to a few hours and may be accelerated by providing a means of "tumbling” or otherwise increasing the contact that occurs between the coal particulate and the softened petroleum pitch.
- venting or leakage of non-oxidizing gas and generated volatiles is inhibited consistent with the production of an acceptable cellular product or foam. Additional more conventional blowing agents may be added to the particulate blend prior to expansion to enhance or otherwise modify the pore-forming operation.
- Cooling of the green foam after soaking is not particularly critical except as it may result in cracking of the green foam as the result of the development of undesirable thermal stresses. Cooling rates less than 10°C/mm to a temperature of about 100°C are typically used to prevent cracking due to thermal shock. Somewhat higher, but carefully controlled, cooling rates may however, be used to obtain a "sealed skin" on the open cell structure of the product as described below. The rate of cooling below 100°C is in no way critical.
- the porous or foamed product is an open celled material.
- Several techniques have been developed for "sealing" the surface of the open celled structure to improve its adhesive capabilities for further fabrication and assembly of a number of parts.
- a layer of a commercially available graphitic adhesive can be coated onto the surface and cured at elevated temperature or allowed to cure at room temperature to provide an adherent skin.
- the expansion operation can be modified by cooling the expanded coal product or preform rapidly, e.g., at a rate of 10°C/min or faster after expansion. It has been discovered that this process modification results in the formation of a more dense skin on the preform or product which presents a closed pore surface to the outside of the preform or product. At these cooling rates, care must be exercised to avoid cracking of the preform or product.
- the green foam produced in accordance with the present invention is readily machineable, sawable and otherwise readily fabricated using conventional fabrication techniques.
- the green foam as just described, it maybe subjected to carbonization and/or graphitization according to conventional processes to obtain particular properties desirable for specific applications of the type described hereinafter.
- Ozonation may also be performed, if activation of the green foam would be useful in a final product application such as in filtering of air.
- additives and structural reinforcers may be added to the coal petroleum pitch blend either before or after expansion to enhance specific mechanical properties such as fracture strain, fracture toughness and impact resistance.
- particles, whiskers, fibers, plates, etc. of appropriate carbonaceous or ceramic composition can be incorporated into the green foam to enhance its mechanical properties.
- the carbon foams, of the present invention can additionally be impregnated with, for example, additional petroleum pitch, epoxy resins or other polymers using a vacuum assisted resin transfer type of process.
- additional petroleum pitch for example, additional petroleum pitch, epoxy resins or other polymers using a vacuum assisted resin transfer type of process.
- the incorporation of such additives provides load transfer advantages similar to those demonstrated in carbon composite materials. In effect a 3-D composite is produced that demonstrates enhanced impact resistance and load transfer properties.
- the cooling step in the expansion process results in some relatively minimal shrinkage on the order of less than about 5% and generally in the range of from about 2% to about 3%. This shrinkage must be accounted for in the production of near net shape carbon foams of specific dimensions and is readily determinable through trial and enor with the particular coal/petroleum pitch starting materials being used.
- the shrinkage may be further minimized by the addition of some inert solid material such as coke particles, ceramic particles, ground waste from the coal expansion process etc. as is common practice in ceramic fabrication.
- Carbonization is conventionally performed by heating the green foam under an appropriate inert gas at a heat-up rate of less than about 5°C per minute to a temperature of between about 800°C and about 1200°C and soaking for from about 1 hour to about three or more hours.
- Appropriate inert gases are those described above that are tolerant of these high temperatures.
- the inert atmosphere is supplied at a pressure of from about 0 psi up to a few atmospheres.
- the carbonization calcination process serves to remove all of the non-carbon elements present in the green foam such as sulfur, oxygen, hydrogen, etc.
- Graphitization commonly involves heating the green foam either before or after carbonization at heat-up rate of less than about 10°C per minute, preferably from about 1°C to about 5°C per minute, to a temperature of between about 1700°C and about 3000°C in an atmosphere of helium or argon and soaking for a period of less than about one hour.
- the inert gas may be supplied at a pressure ranging from about 0 psi up to a few atmospheres.
- the simplest products that could be fabricated using the carbon foams of the present invention are various lightweight sheet products useful in the construction industry. Such products may involve the lamination of various facing materials to the surface of a planar sheet of the preform material using an appropriate adhesive. For example, a very light and relatively inexpensive wall board would simply have paper laminated to its opposing planar surfaces, while a more sophisticated curtain wall product might have aluminum sheet, polymer or fiber-reinforced polymer sheets or even stainless steel sheet laminated thereto.
- a wide variety of such products that have lightweight, low cost and adequate strength can easily be envisioned for wallboard, structural wallboard, bulkheads, etc. he materials of the present invention exhibit sound insulation and vibration resistance due to excellent sound and vibration damping properties. Controlled thermal conductivity may also be designed into the carbon foam due to the presence of the petroleum pitch in the initial particulate blend.
- Laminates of these materials may even be used to produce heating element incorporating members, since a graphitized core could serve as an electrical heating element when connected to an appropriate source of electrical energy.
- Yet another product application for the carbon foams of the present invention is as a replacement for the ceramic foam filters currently applied in the filtering of molten metal such as aluminum for the removal of contaminating particulates also called inclusions.
- the current ceramic foam materials are relatively expensive and extremely friable. It is easily possible to produce a carbon foam of the type described herein having an appropriate pore size and of the same size and shape as the ceramic foam filter using the above described fabrication process, to serve as a molten metal filter of this type. The cost of such a more robust, i.e., less friable, filter would be considerably less than that of a comparable ceramic foam filter.
- the carbon foams of the present invention can be produced in any solid geometric shape.
- Such production is possible using any number of modified conventional processing techniques such as extrusion, injection molding, etc.
- the process must, of course, be modified to accommodate the processing characteristics of the starting material coal.
- the coal powder starting material is fed by an auger into an expansion chamber where it is expanded and from which it is extruded while still viscous, i. e. within the "plastic range" of the particulate blend.
- the material Upon exiting the extrusion die, the material is cooled to provide a solid shape of the desired and precalculated dimensions.
- the "encapsulation” can be achieved by heating the green blend to a temperature below the expansion point, e.g., below about 300°C, feeding the "encapsulated blend” into the auger chamber where additional heat is imparted to the particulate blend to initiate expansion with final heating and expansion being achieved just before extrusion through the die.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
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- Ceramic Products (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020047012154A KR100989793B1 (en) | 2002-02-05 | 2003-02-05 | Blended pitch/coal based carbon foams |
EP03737598A EP1485451A4 (en) | 2002-02-05 | 2003-02-05 | Blended pitch/coal based carbon foams |
JP2003566136A JP2005516880A (en) | 2002-02-05 | 2003-02-05 | Blended pitch / charcoal based carbon foam |
AU2003210822A AU2003210822A1 (en) | 2002-02-05 | 2003-02-05 | Blended pitch/coal based carbon foams |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/068,075 US6656239B1 (en) | 2002-02-05 | 2002-02-05 | Blended pitch/coal based carbon foams |
US10/068,075 | 2002-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003066784A1 true WO2003066784A1 (en) | 2003-08-14 |
Family
ID=27732243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/003218 WO2003066784A1 (en) | 2002-02-05 | 2003-02-05 | Blended pitch/coal based carbon foams |
Country Status (7)
Country | Link |
---|---|
US (1) | US6656239B1 (en) |
EP (1) | EP1485451A4 (en) |
JP (1) | JP2005516880A (en) |
KR (1) | KR100989793B1 (en) |
CN (1) | CN1646668A (en) |
AU (1) | AU2003210822A1 (en) |
WO (1) | WO2003066784A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100374367C (en) * | 2003-11-07 | 2008-03-12 | 大连理工大学 | Technical method and schedule for preparation of foam carbon material used asphalt as raw material |
CN103131437A (en) * | 2011-11-25 | 2013-06-05 | 仇峰 | Manufacturing method of solid bamboo charcoal in compression molding mode |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US6814765B1 (en) * | 1999-12-02 | 2004-11-09 | Touchstone Research Laboratory, Ltd. | Cellular coal products and processes |
US6455804B1 (en) * | 2000-12-08 | 2002-09-24 | Touchstone Research Laboratory, Ltd. | Continuous metal matrix composite consolidation |
US6833012B2 (en) * | 2001-10-12 | 2004-12-21 | Touchstone Research Laboratory, Ltd. | Petroleum pitch-based carbon foam |
US7247368B1 (en) * | 2001-10-12 | 2007-07-24 | Touchstone Research Laboratory, Ltd. | Stealth foam and production method |
US7824645B2 (en) * | 2004-01-20 | 2010-11-02 | Touchstone Research Laboratory, Ltd. | High density carbon from coal |
US7316262B1 (en) * | 2004-01-26 | 2008-01-08 | Rini Technologies, Inc. | Method and apparatus for absorbing thermal energy |
US8631855B2 (en) * | 2008-08-15 | 2014-01-21 | Lighting Science Group Corporation | System for dissipating heat energy |
CN102219208B (en) * | 2011-03-28 | 2012-11-21 | 航天材料及工艺研究所 | Method for enhancing heat conduction performance of foamy carbon with high aperture ratio |
US9382721B2 (en) | 2013-07-29 | 2016-07-05 | Steven P. Morta | Modular security system for above-ground structures |
KR101627324B1 (en) * | 2014-08-28 | 2016-06-03 | 한국화학연구원 | Hydro-foam carbon materials and Manufacture Method thereof |
WO2016154289A1 (en) | 2015-03-25 | 2016-09-29 | Wichita State University | Carbon particulates and composites thereof for musculoskeletal and soft tissue regeneration |
US10941042B2 (en) * | 2018-04-06 | 2021-03-09 | West Virginia University | Processes and compositions for carbon foams and materials |
US11345598B2 (en) * | 2018-10-10 | 2022-05-31 | Cfoam Llc | Method for pore stabilized carbon foam |
US11858818B2 (en) | 2019-10-24 | 2024-01-02 | West Virginia University | Processes and compositions for carbon foam materials |
US11685662B2 (en) * | 2020-06-17 | 2023-06-27 | Touchstone Research Laboratory, Ltd. | Coal based silicon carbide foam |
US11685661B2 (en) * | 2020-06-17 | 2023-06-27 | Touchstone Research Laboratory, Ltd. | Carbon foam based silicon carbide |
WO2023167778A1 (en) * | 2022-03-01 | 2023-09-07 | Cfoam Llc | Continuous manufacturing of carbon foam structures at atmospheric pressure |
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2002
- 2002-02-05 US US10/068,075 patent/US6656239B1/en not_active Expired - Lifetime
-
2003
- 2003-02-05 WO PCT/US2003/003218 patent/WO2003066784A1/en not_active Application Discontinuation
- 2003-02-05 JP JP2003566136A patent/JP2005516880A/en active Pending
- 2003-02-05 EP EP03737598A patent/EP1485451A4/en not_active Withdrawn
- 2003-02-05 AU AU2003210822A patent/AU2003210822A1/en not_active Abandoned
- 2003-02-05 KR KR1020047012154A patent/KR100989793B1/en not_active IP Right Cessation
- 2003-02-05 CN CN03807818.XA patent/CN1646668A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6033506A (en) * | 1997-09-02 | 2000-03-07 | Lockheed Martin Engery Research Corporation | Process for making carbon foam |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100374367C (en) * | 2003-11-07 | 2008-03-12 | 大连理工大学 | Technical method and schedule for preparation of foam carbon material used asphalt as raw material |
CN103131437A (en) * | 2011-11-25 | 2013-06-05 | 仇峰 | Manufacturing method of solid bamboo charcoal in compression molding mode |
Also Published As
Publication number | Publication date |
---|---|
AU2003210822A1 (en) | 2003-09-02 |
KR20040106280A (en) | 2004-12-17 |
CN1646668A (en) | 2005-07-27 |
EP1485451A4 (en) | 2010-07-07 |
US6656239B1 (en) | 2003-12-02 |
EP1485451A1 (en) | 2004-12-15 |
KR100989793B1 (en) | 2010-10-29 |
JP2005516880A (en) | 2005-06-09 |
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