WO1980001683A1 - Procede de preparation d'un materiau a base de carbone et de graphite a haute densite et a haute resistance - Google Patents

Procede de preparation d'un materiau a base de carbone et de graphite a haute densite et a haute resistance Download PDF

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Publication number
WO1980001683A1
WO1980001683A1 PCT/JP1980/000018 JP8000018W WO8001683A1 WO 1980001683 A1 WO1980001683 A1 WO 1980001683A1 JP 8000018 W JP8000018 W JP 8000018W WO 8001683 A1 WO8001683 A1 WO 8001683A1
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WO
WIPO (PCT)
Prior art keywords
temperature
firing
raw
coke
pitch
Prior art date
Application number
PCT/JP1980/000018
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English (en)
Japanese (ja)
Inventor
H Fukuda
M Nakagawa
S Okada
H Morijiri
K Ozaki
Original Assignee
Maruzen Petrochem Co Ltd
H Fukuda
M Nakagawa
S Okada
H Morijiri
K Ozaki
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Maruzen Petrochem Co Ltd, H Fukuda, M Nakagawa, S Okada, H Morijiri, K Ozaki filed Critical Maruzen Petrochem Co Ltd
Publication of WO1980001683A1 publication Critical patent/WO1980001683A1/fr

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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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/521—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained by impregnation of carbon products with a carbonisable material
    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder

Definitions

  • the present invention relates to a method for producing high-density, high-strength carbon and graphite materials using raw coke as a raw material.
  • a general carbon material is usually pulverized into coke that has been calcined at 1,200 to 1,500 ° C, and a binder such as bite is added thereto. It is manufactured through a series of processes such as re-crushing, molding, and firing.
  • a substantial part of the used underpitch for example, 1Z5 or more, is decomposed and volatilized during firing, and the remaining carbon content is reduced at the firing temperature. Since the carbon material shrinks as the temperature rises, many pores remain in the carbon material after firing, and the carbon material cannot be sufficiently densified, and usually has a bulk density even if it is graphitized; ⁇ 1.70 to 1.759 It is only possible to obtain something less than / d.
  • a molded body once fired (referred to as a primary fired product) ⁇ immersed in a melting bite under reduced pressure
  • a method of impregnating and depositing a pitch into carbon and then carbonizing by firing at a temperature of 100 O'G or more at high temperature has been carried out.]
  • this firing-impregnation of pitch Repeat! Is required to be returned.
  • the primary baking temperature is determined so that the carbon content derived from the bizoda pitch is sufficiently shrunk and a large amount of the pitch is impregnated in the subsequent pitch impregnation step. Above 750 ° C,
  • reactor graphite material usually, 800 or more is required. When producing reactor graphite material, it may be fired at around 1500'C.
  • the purpose of the present invention is usually easily available, such as in a commercial raw mix.
  • a carbon and graphite material having a higher strength than the proposed self-sintering method and a conventional method using calcined coke as a raw material can be used.
  • the aim is to provide a method that is simple and easy to manufacture.
  • Another object of the present invention is to select high-purity raw petroleum coke as raw coke.] 3 Extremely high purity suitable for semiconductors or reactor core materials, etc. It is an object of the present invention to provide a method for economically producing a high-purity graphite material without going through a “high-purification treatment” that was indispensable in the conventional method.
  • the present invention relates to a raw pulverized raw coke that sinters without being melted during firing, or a mixture of the ground pulverized material and the neutral bite. , And press the molded body to 45 Or!
  • a high-density, high-strength carbon material that can be primarily baked at a temperature of up to 700 ° C, then impregnated with pitch under pressure, and then carbonized by high-temperature secondary calcination in a conventional manner. It provides a method for manufacturing.
  • the present invention provides a method for producing a high-density and high-strength graphite material, which comprises a step of graphitizing the carbon material thus obtained in a conventional manner.
  • the raw material used in the present invention may be any raw coke that is sintered without being melted at the time of firing such as commercially available raw petroleum coke or raw pitch coke. Is. Of course, high-purity raw material with few impurities — If carefully treated with grease, it is possible to obtain high quality carbon and graphite materials.
  • raw raw coke is finely pulverized using a pulverizer such as a grinding method or an impact method.
  • a pulverizer such as a grinding method or an impact method.
  • powder having a mean particle size of 20 A or less can be applied, but the effect of the present invention is more remarkable especially when a powder having a mean particle size of 1 O A ′ or less is used.
  • the thus obtained raw coke fine powder has a self-sintering property, so that a high density and high strength carbon material which is intended by the method of the present invention by blending with a pitch of pitch is used. Can be led to.
  • raw material having a low volatile content that is, raw coke having a volatile content of about 7% or less
  • the self-sintering property of the raw material is small.
  • a small amount of binder pitch should be blended because the compact may be destroyed during the impregnation.
  • a more homogeneous carbon material can be obtained. .
  • the blending amount of binder bite is 100 parts by weight of core, and usually about 25 to 40 parts by weight.
  • the amount is about 0 to ⁇ parts, preferably about 2 to 4 parts.
  • the molded body obtained in this way is subjected to pitch impregnation after the primary firing, and the primary firing temperature is set at 450-
  • the calcination temperature is 70 OtJ or more, no further improvement in the strength of the carbon material due to pitch impregnation is observed, and the strength decreases despite the increase in bitumen impregnation. Show a tendency to.
  • the temperature is 45 O'C or less, the primary fired body may be broken during the pitch impregnation treatment because the volatile components of the raw coke are not sufficiently decomposed and the bonding force between the particles is weak. ]), How can I prevent the destruction of octopus?] It is not preferable because it requires a long firing time, for example, 48 hours or more.
  • the primary baking temperature needs to be at least 75 ° C or more, and usually 800 ° C or more. It has been said that the higher the height, the more the bitches are sufficiently impregnated, so that a high-density carbon material can be obtained.
  • the present invention using raw mix, 45 O'C! ⁇
  • the conventional method] 3 also achieved satisfactory high-strength carbon material by primary firing in a much lower temperature range! )
  • an extremely high-strength carbon material can be obtained despite the low primary firing temperature.
  • the decomposition of the raw coke begins to occur around 550 ° C.
  • the rapid weight loss ends at a temperature of 0 to 0.50 ° ⁇ .
  • this is the volume shrinkage due to molding sintering D.) It starts gradually from around 450 ° C, which is as high as 100 ° C], and starts from around 500 ° C. It becomes noticeable up to around 0 0.
  • the porosity is high at a low temperature around 500 ° C., and the amount of impregnated bite is large.
  • the porosity gradually decreases due to shrinkage of the molded product! ),
  • the amount of pitch to be impregnated is reduced.
  • the temperature exceeds 700 ° C, the amount of bite that is impregnated again increases, but this does not mean that the shrinkage of the whole compact decreases, but the coke particles that compose it This is probably due to the remarkable shrinkage of the pores, which increases the number of pores.
  • the primary firing is carried out at a temperature of 100 ° C. or more, the amount of bitches to be impregnated is large, but the shrinkage of the compact itself during the secondary firing is small. Due to the large shrinkage of the carbon generated from this, pores and defects increase.
  • the primary calcination temperature range that is advantageous for significantly increasing the impregnation effect is as follows.
  • the abrupt change in the volumetric shrinkage of the compact ends. 1) In the low temperature range], especially in the range where the porosity increases due to the temperature difference between thermal decomposition and volumetric shrinkage. It can be said that the thermal decomposition of raw raw coke does not end, leaving a part that is organic.
  • pitch for impregnation use is made of a coal pitch, an asphalt pitch, "ethylene", a pitch pitch, and the like. It is also possible to use a mixture of dianthus and diluent, such as tar.
  • the impregnation temperature is low enough that the molten bite 'can penetrate into the pores of the primary fired product, but it is not easily decomposed or volatilized. ] To 250 ° C. If the bite is mostly soluble in the diluent, such as an ethylene bite, dilute it with the diluent and place it around 100 ° G. It can be impregnated at a low temperature.
  • the diluent such as an ethylene bite
  • the high-temperature secondary baking of the primary-baked product thus impregnated and, if necessary, the subsequent graphitization step can be carried out by a conventional method in the prior art.
  • secondary firing is generally 1 0 0 0 ⁇ above temperature, divided Gyoru in example 1 2 0 0 ⁇ 1 4 0 0 ° C a temperature of approximately.
  • Graphitization is usually performed at a temperature of about 240 to 500 O'C, but depending on the intended use of the graphite material, it may be possible to partially graphitize at a lower temperature. You can do it.
  • the raw coke is usually used as raw material without using a limited raw coke or a specially treated carbonaceous raw material.
  • the cost is cheap.
  • a preferred embodiment of the present invention for producing a high-purity graphite material is to pulverize a high-purity raw petroleum coke having an ash content of 500 ppm or less, and to use this as a binder. Press molding without compounding and press the molded body at 450 ° C! Low temperature at a temperature of up to 700 ° G-next firing, then impregnated with high-purity pitch under pressure, high temperature secondary at over 1200 ° C, preferably over 150 ° C Baking, and baking the same fired body. High-purity crude petroleum oil with an ash content of 500 ppm or less
  • the ash content is 2 (less than about 3 ppm, the boron content is about 0.1 to about 2 ppm, and the purity of high-purity, high-density, high-strength graphite material is about 2 ppm). And can be manufactured economically.
  • a high-purity crude petroleum coke with an ash content of 500 ppm or less which is useful as a raw material for this purpose, for example, when cracking ethylene such as naphtha and kerosene oil
  • ethylene pyrolysis tar
  • the crude petroleum coss or the heavy oil, which has a large amount of impurities, obtained in this manner is lightly pyrolyzed in advance, and the components rich in the impurities are polycondensed and removed as bits. It is a raw petroleum coke obtained by converting the remaining fraction into a delayed coke.
  • OiVPI A particularly preferred example of the last-mentioned coke making method is described in US Pat. No. 4,177,155.
  • the calcined coke used as the impregnating pitch and the packing in the graphitization process is also of high purity. Should be used.
  • a pyrolysis tarbit by-produced during the decomposition of ethylen such as naphtha, kerosene oil, etc.
  • a finely pulverized powder of calcined coke obtained by calcining the same high-purity crude petroleum coke as used as a raw material in this method.
  • This primary fired product is placed in a pressure-resistant container containing a coal tar pitch having a softening point of 87 ° G, and gradually heated to 250 ° C under a reduced pressure of 10 to 2 D ⁇ Hg. After being heated for 1 hour, it was kept under a pressure of 10 / ⁇ for 1 hour to impregnate the bite, and then fired with 1400'G in the same manner as in the primary firing (called secondary fired product). .
  • the secondary fired product was further graphitized at 2,400'C. Table 1 shows the physical properties of the secondary fired product and the graphitized product. For comparison, the results of molding and graphitization without pit impregnation and the physical properties of commercial graphitized products are also shown for comparison.
  • Example 2 The same crude petroleum mixture as in Example 1 was pulverized by the same method to an average particle size of 5.4 A, and this was rubberized under a pressure of 1000 z. Then, a molded body of 17.5 ⁇ 10.5 ⁇ 4.0 cm was manufactured. After sintering the compact at 550 ° C for 3 hours, it was impregnated with pitch in the same manner as in Example 1, subjected to secondary calcination, and graphitized at 260 ° C ( however, primary The heating rate during secondary firing was 7.5 ⁇ ⁇ GZ, and the retention time during pitch impregnation was 5 hours.
  • Table 2 shows the bulk density and flexural strength of the secondary fired product and the graphitization. For comparison, the results of molding in the same manner as above, firing and graphitizing without impregnating the pitch are also shown as reference examples. Table 2
  • Example 2 The same raw petroleum coextruded as in Example 1 was pulverized with an impact pulverizer to an average particle size of 4.5; ".
  • a compact having a diameter of S cm and a height was manufactured by pressure molding at each pressure of 2, 000. This was subjected to primary firing, bite impregnation, secondary firing, and the like as in Example 1. And 2,200 "2, did. However, primary firing was performed at 550 ° C for 5 hours.
  • Table S shows the physical properties of the secondary fired product and the blackened product.
  • This molded body was subjected to primary firing, pitch impregnation, secondary firing, and graphitization at 2,500 ° C. in the same manner as in Example 2.
  • Table 4 shows the physical properties of the secondary fired product and the graphitized product.
  • Table 5 shows the physical properties of the graphitized product.
  • Raw petroleum coke with a volatile content of 14.5% is pulverized to an average particle size of 5.0 A by an dry runner without adding water to an average particle size of 5.5 A, and then to 55 mesh (JIS sieve) or more.
  • rubber press molding was performed at a pressure of 1000 to produce a molded article having a diameter of 14 CTI and a height of 1 cm.
  • Table 2 shows the physical properties of the graphitized product.
  • Example 7 The same method as in Example 5 was used to classify the raw stone oil mixture that had been finely pulverized to an average particle size of 0.1 ⁇ "by air classification, and the average particle size was 3.9 A with a yield of about 50%.
  • This graphite material was cut into 2.5 X 2.5 X 5 cm and used as an electrode.
  • An electric discharge machining test was performed.
  • the work material was alloy steel for molds, and the bottom was machined to a depth of 1 to 2 haze.
  • the electrode polarity was set to low polarity (+), low wear conditions, the pulse width and the pause width were set to 5 OA seconds, and the peak current was set to 25 amperes.
  • the machining surface roughness was about 7 (the electrode length consumption was 2.5 to 5.8% for the first-class commercial product, and the machining surface roughness was 8 to 15 mm).
  • ⁇ ⁇ Used as raw raw mix. This was ground with an edge runner for 2 hours, and then passed through a mesh under a mesh (a Japanese standard sieve). To produce a formed body having a diameter of 12 cm and a height of 1 and was subjected to primary firing at various primary firing temperatures in the range of 400 ° C. to 90 O′C. At that time, the temperature rise of the firing atmosphere is from 15 ° CZ from room temperature to 560 ° C, from 100 ° C to 40 ° C from 56D′C, and from 40D ° C. Ra ⁇ 0 [! In the meantime, the temperature was maintained at the same temperature for a predetermined time after reaching the predetermined temperature.
  • the ethylene bite was impregnated for 8 hours.
  • the ethylene bite is obtained by distilling naphtha ethylene to remove a boiling point fraction of 55 ° C or lower, and has a softening point of 150 ° C ( Ring-and-ball method), with a fixed carbon content of 5 to 5.3%.
  • the bite-impregnated primary fired product was similarly subjected to secondary firing up to 130 O'C.
  • the temperature rise is the same as above when the temperature rises below 40 O'C] 3, 5'0 / h from 400 * 0 to 750'0, and from 75 ° C to 900 ° C In this case, the temperature was kept at 20 ° C, from 900 ° C to 150 ° C, at 50 ° C, and at 15D0 ° 0 for 3 hours.
  • the obtained secondary fired product is filled with the same raw petroleum coke as the raw material in a calcined powder that has been calcined at 150 ° C, and is directly energized in a normal graphite furnace.)) 2 It was graphitized by heating to 800'C.
  • Table 8 shows the relationship between the primary firing temperature and the bitch impregnation rate, and the characteristics of the secondary fired product and the graphitized product.
  • Raw crude oil coke and 550 The impurity content of the graphite material obtained in the experimental example of primary calcination with C and the same Table 9 compares the characteristics of graphite materials with those of typical commercial graphite materials for nuclear reactors and semiconductor manufacturing.
  • the obtained crude petroleum coke was pulverized to an average particle size of ⁇ 5 with an impact crusher, then crushed with an edge runner for ⁇ 0 minutes, and passed through a mesh screen. Forming was performed with 100 ⁇ 0> ⁇ to obtain a formed form of 20X12X0CK. This was primarily fired in exactly the same manner as in Example 8, impregnated with the same pitch, secondary fired, and then graphitized. The impregnation amount of the bitite was 21.9 weight based on the primary fired product], and the dimensions of the graphite material were 17.5 ⁇ 10.4 ⁇ 5.2 cm. The characteristics and impurities of the obtained graphite material The weight is shown in Table 10 Table 10
  • Direct desulfurized oil of 0.52%, specific gravity 0.9188 and residual carbon of 5.9% Conradon was obtained from Middle Eastern mixed crude oil.
  • the carbonaceous materials (secondary fired products) and graphite materials (graphitized products) produced by the method of the present invention are very high-density and high-strength materials.
  • materials especially sliding parts and electrodes for electrolysis, etc., as well as various materials for machinery, materials for metallurgy such as crucibles, various types of electric discharge machining electrodes, semiconductors, and materials for nuclear reactors. It can be widely used.
  • high-purity black material with a low ash content is useful as a semiconductor material and a reactor core material requiring strict standard values.

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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)
  • Ceramic Products (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

Procede de preparation d'un materiau a base de carbone et de graphite a haute densite et a haute resistance a partir de coke brut. Le coke brut finement pulverise seul ou en combinaison avec un bitume de liaison, est moule sous pression, le produit moule obtenu est soumis a une cuisson primaire a des temperatures de 450-700 C qui sont inferieures a celles de la technique anterieure et le produit de cuisson est alors impregne de bitume et soumis a une cuisson secondaire a temperatures elevees de maniere conventionnelle. Le graphite est produit par la graphitisation du materiau a base de carbone de maniere conventionnelle. L'utilisation d'un coke brut de petrole possedant un contenu en cendres de 500 ppm, en tant que materiau de depart selon la mise en oeuvre preferee, sans l'utilisation de bitume de liaison fournit un graphite pur particulierement utile pour les semi-conducteurs et les materiaux de reacteurs nucleaires.
PCT/JP1980/000018 1979-02-09 1980-02-08 Procede de preparation d'un materiau a base de carbone et de graphite a haute densite et a haute resistance WO1980001683A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1326879A JPS55109214A (en) 1979-02-09 1979-02-09 Preparing high-density, high-strength carbonaceous material
JP79/13268 1979-02-09

Publications (1)

Publication Number Publication Date
WO1980001683A1 true WO1980001683A1 (fr) 1980-08-21

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JP (1) JPS55109214A (fr)
DE (1) DE3034359C2 (fr)
WO (1) WO1980001683A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144406A (en) * 1983-07-29 1985-03-06 American Telephone & Telegraph Production of an electrically conducting molding and device comprising such molding
US5069403A (en) * 1985-05-31 1991-12-03 Minnesota Mining And Manufacturing Company Drag reduction article
CN102583342A (zh) * 2012-02-05 2012-07-18 加拿大环球石墨有限公司 微晶石墨提纯方法
CN103130208A (zh) * 2013-03-21 2013-06-05 任利华 采用压球工艺生产炭素中间体的方法
CN108794011A (zh) * 2018-07-05 2018-11-13 自贡东新电碳有限责任公司 一种自烧结碳石墨密封材料的制备方法
CN113929461A (zh) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 一种各项同性碳材料制备方法

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JPS57205371A (en) * 1981-06-11 1982-12-16 Hitachi Maxell Carbon rod for dry battery
JPS57205370A (en) * 1981-06-11 1982-12-16 Hitachi Maxell Carbon rod for dry battery
JPS60181170U (ja) * 1984-05-12 1985-12-02 日立工機株式会社 電動機のカ−ボンブラシ摩耗検出回路
DE3509299A1 (de) * 1985-03-15 1986-09-25 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Einrichtung zur zustandserkennung von kohlebuersten bei antrieben, insbesondere bei antrieben an druckmaschinen
JPH01122966A (ja) * 1987-11-07 1989-05-16 Kobe Steel Ltd 炭素材の製造方法
US4963396A (en) * 1989-02-23 1990-10-16 Toshiba Ceramics Co., Ltd. Method for making an impregnated ceramic material
JPH07118066A (ja) * 1993-10-22 1995-05-09 Tokai Carbon Co Ltd 高強度等方性黒鉛材の製造方法
DE19838021C2 (de) * 1998-08-21 2002-07-18 Sintec Keramik Gmbh Kolben aus Feinstkornkohlenstoff, Verfahren zu seiner Herstellung und seine Verwendung
CN106276871B (zh) * 2016-07-28 2018-02-09 芜湖迈特电子科技有限公司 基于沥青焦与石油焦共混合制备导热石墨片的工艺

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JPS51150505A (en) * 1975-06-20 1976-12-24 Maruzen Sekiyu Kagaku Kk Manufacture of high density and isotropy carbon mold bodies
JPS5379789A (en) * 1976-12-24 1978-07-14 Maruzen Sekiyu Kagaku Kk Method of making high density carbon material

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JPS51150505A (en) * 1975-06-20 1976-12-24 Maruzen Sekiyu Kagaku Kk Manufacture of high density and isotropy carbon mold bodies
JPS5379789A (en) * 1976-12-24 1978-07-14 Maruzen Sekiyu Kagaku Kk Method of making high density carbon material

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Title
YOGYO KYOKAI-HEN: "Yogyo Kogyo Handbook", 25 December 1966, GIHODO, pages: 1743 - 1745 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144406A (en) * 1983-07-29 1985-03-06 American Telephone & Telegraph Production of an electrically conducting molding and device comprising such molding
US5069403A (en) * 1985-05-31 1991-12-03 Minnesota Mining And Manufacturing Company Drag reduction article
CN102583342A (zh) * 2012-02-05 2012-07-18 加拿大环球石墨有限公司 微晶石墨提纯方法
CN103130208A (zh) * 2013-03-21 2013-06-05 任利华 采用压球工艺生产炭素中间体的方法
CN108794011A (zh) * 2018-07-05 2018-11-13 自贡东新电碳有限责任公司 一种自烧结碳石墨密封材料的制备方法
CN113929461A (zh) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 一种各项同性碳材料制备方法

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Publication number Publication date
DE3034359C2 (de) 1986-02-27
JPS5725484B2 (fr) 1982-05-29
JPS55109214A (en) 1980-08-22
DE3034359A1 (en) 1981-04-09

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