JPH0226821A - Spherical graphite fine powder and its manufacture - Google Patents
Spherical graphite fine powder and its manufactureInfo
- Publication number
- JPH0226821A JPH0226821A JP63173961A JP17396188A JPH0226821A JP H0226821 A JPH0226821 A JP H0226821A JP 63173961 A JP63173961 A JP 63173961A JP 17396188 A JP17396188 A JP 17396188A JP H0226821 A JPH0226821 A JP H0226821A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- fine powder
- fine
- organic carbon
- spherical graphite
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000000843 powder Substances 0.000 title claims abstract description 34
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 13
- 239000010439 graphite Substances 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000001257 hydrogen Substances 0.000 claims abstract description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 150000001722 carbon compounds Chemical class 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- 150000002894 organic compounds Chemical class 0.000 claims description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 239000002245 particle Substances 0.000 abstract description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 4
- 150000001412 amines Chemical class 0.000 abstract description 2
- 239000008246 gaseous mixture Substances 0.000 abstract 2
- 238000000197 pyrolysis Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 4
- 235000019241 carbon black Nutrition 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005087 graphitization Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000976 ink Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は例えば、ビデオテープのバックコート等に使用
して、潤滑性や導電性を付与したり、さらに着色用とし
て用いられる表面に実質的に凹凸のない黒鉛微粉および
その製造法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention can be used, for example, as a back coat for video tapes, to impart lubricity and conductivity, and to add substantial color to the surface used for coloring. The present invention relates to a fine graphite powder with no irregularities and a method for producing the same.
〈従来の技術）
黒鉛微粉の製造方法としては主として次の二方法がある
。(Prior art) There are two main methods for producing fine graphite powder:
１、黒鉛粉の粉砕
数十〜数百μｍの黒鉛粒をボールミル等で粉砕する方法
がある。黒鉛はすべり易い性質をもっており、粉砕効率
が悪く、また粉砕の際の雰囲気の制御が難しく、さらに
粉砕に要するエネルギーも大である。そして実際に粉砕
によって得られる黒鉛の粉の径には限度があり、ｌｐｍ
以下のものをうることは難しい、又、粉砕によって得ら
れる黒鉛粉は表面に凹凸があり、実質的に表面が平滑な
球状粒を得ることはできない。1. Grinding of graphite powder There is a method of grinding graphite particles with a size of several tens to hundreds of micrometers using a ball mill or the like. Graphite has slippery properties, has poor pulverization efficiency, is difficult to control the atmosphere during pulverization, and requires a large amount of energy for pulverization. There is a limit to the diameter of graphite powder that can actually be obtained by crushing, and lpm
It is difficult to obtain the following, and the graphite powder obtained by pulverization has an uneven surface, making it impossible to obtain spherical particles with a substantially smooth surface.
２、カーボンブラックの黒鉛化
カーボンブラックは例えば炭化水素の不完全燃焼によっ
て得られ、ゴム製品、顔料、インク等の配合剤に用いら
れる乱層構造の無定形炭素であり、その径は数１０〜１
０００人と小さい、したがってこのものを黒鉛化できれ
ば、はＣ球形の黒鉛粒をうることができるが、実際上は
、カーボンブラックはハードカーボンであり、このもの
を熱処理しても黒鉛化することは実際的に不可能である
。2. Graphitization of carbon black Carbon black is an amorphous carbon with a turbostratic structure obtained by incomplete combustion of hydrocarbons and used in compounding agents for rubber products, pigments, inks, etc., and its diameter is several tens to 1
If this material can be graphitized, it is possible to obtain C spherical graphite grains, but in reality, carbon black is hard carbon, and even if this material is heat treated, it cannot be graphitized. Practically impossible.
〈発明が解決しようとする課題〉
黒鉛微粉に対する需要が増加し、特に従来は製造不能で
あったほぐ球状で凹凸が表面に殆ど存在せず、しかもそ
の径が０．１〜２４ｍと極めて小さくかつ粒度分布幅が
狭い黒鉛微粉の開発が強く望まれている。<Problem to be solved by the invention> The demand for fine graphite powder has increased, and in particular, it has been found that graphite powder has a loose spherical shape, which has been impossible to produce in the past, has almost no irregularities on its surface, and has an extremely small diameter of 0.1 to 24 m. The development of fine graphite powder with a narrow particle size distribution is strongly desired.
〈課題を解決するための手段〉
前記要望に応するため本発明は有機炭素化合物と水素と
の混合ガスを１１００℃〜１４００℃に加熱して有機化
合物を熱分解させ、得られた炭素質微粉を２０００℃以
上で熱処理することを特徴とする球状黒鉛微粉の製造方
法に関する。<Means for Solving the Problems> In order to meet the above-mentioned needs, the present invention heats a mixed gas of an organic carbon compound and hydrogen to 1100°C to 1400°C to thermally decompose the organic compound, and produces carbonaceous fine powder obtained. The present invention relates to a method for producing spherical graphite fine powder, which comprises heat-treating spherical graphite fine powder at 2000°C or higher.
そして本発明方法により製造される球状黒鉛微粉は直径
が０．１〜２ｐｍであり、しかもその表面は球面で実質
的に凹凸のない新規の球状微粉である。この球状黒鉛微
粉は、例えばビデオテープのバックコート用として特に
好適である。The spherical graphite fine powder produced by the method of the present invention has a diameter of 0.1 to 2 pm, and is a novel spherical fine powder with a spherical surface and substantially no irregularities. This fine spherical graphite powder is particularly suitable for use as a back coat for video tapes, for example.
次に本発明の製造方法について詳述する。Next, the manufacturing method of the present invention will be explained in detail.
原料として、有機炭素化合物と水素を使用する。Organic carbon compounds and hydrogen are used as raw materials.
有機炭素化合物としては、ベンゼン、トルエン、キシレ
ン、ヘキサン、プロパン、メタン、エタン等の炭化水素
；アルコール、アセトン等ノ酸素含有の有機炭素化合物
；アミン類等の窒素含有の有機炭素化合物等が用いられ
る。そして特に炭化水素がそのうちでも特にベンゼンが
得られた微粉の結晶性が良いという理由で好ましい。な
お有機炭素化合物と水素とはモル比で即ち有機炭素化合
物／水素＝ ０．０５〜０．５の範囲が好ましい、水素
が多すぎると効率が悪く、また水素が少なすぎると凹凸
の多い欠陥の含まれたものになる。Examples of organic carbon compounds used include hydrocarbons such as benzene, toluene, xylene, hexane, propane, methane, and ethane; oxygen-containing organic carbon compounds such as alcohol and acetone; and nitrogen-containing organic carbon compounds such as amines. . Hydrocarbons are particularly preferred, especially benzene, because the resulting fine powder has good crystallinity. The molar ratio of the organic carbon compound and hydrogen is preferably in the range of organic carbon compound/hydrogen = 0.05 to 0.5. Too much hydrogen leads to poor efficiency, and too little hydrogen leads to uneven defects. It becomes included.
なお有機炭素化合物と水素との外にさらにアルゴン等の
不活性ガスを最大５０％混合してもよい。In addition to the organic carbon compound and hydrogen, an inert gas such as argon may be mixed at a maximum of 50%.
前記の混合ガスを１１００℃〜１４００℃に加熱された
空間に供給する。そうすると反応空間において黒鉛構造
に近い表面をもつ炭素質微粉をうることができる。The above-mentioned mixed gas is supplied to a space heated to 1100°C to 1400°C. In this way, carbonaceous fine powder having a surface close to a graphite structure can be obtained in the reaction space.
この場合反応条件によって、生成物は繊維状となるが、
本発明方法においては、特に水素と有機化合物とのモル
比、温度を前記の範囲とし、さらには反応に際して不活
性表面をもつ微細な核を存在させることにより、目的と
する球状黒鉛微粉をうることができる。In this case, depending on the reaction conditions, the product becomes fibrous, but
In the method of the present invention, the desired spherical graphite fine powder can be obtained by specifically adjusting the molar ratio of hydrogen and organic compound and the temperature within the above-mentioned ranges, and further by allowing the presence of fine nuclei with inert surfaces during the reaction. I can do it.
核としては、Ｆｅ、 Ｃｏ、 ８４又はそれらの酸化物
等の化合物の島微粉（３０λ〜３００人程度）であって
、その表面が不活性であるものを前記混合ガスに対して
０．０００１〜０．０１ｗｔ％添加しておくとよい。The core is an island fine powder (approximately 30λ to 300 particles) of a compound such as Fe, Co, 84, or an oxide thereof, whose surface is inert, at a rate of 0.0001 to 0.0001 to the above-mentioned mixed gas. It is preferable to add 0.01 wt%.
酸化物は不活性であるが、金属微粉はその表面を酸化す
ることによって不活性となる。活性のものを用いると析
出する炭素が繊維状となる。Oxides are inactive, but fine metal powder becomes inactive by oxidizing its surface. When an active material is used, the precipitated carbon becomes fibrous.
この反応により炭素質の微粉が生成する。この微粉を捕
集し、さらに少なくとも２０００℃以上で熱処理するこ
とにより、該微粒子中で炭素原子の整列が進行し、黒鉛
化され、最終的に黒鉛微粉が生成する。なお本発明にお
いて、黒鉛微粉は必ずしも微粉の全構造が黒鉛化される
ことを要しない。This reaction produces carbonaceous fine powder. By collecting this fine powder and further heat-treating it at a temperature of at least 2000° C. or higher, the carbon atoms in the fine particle proceed to be aligned, graphitized, and finally graphite fine powder is produced. In the present invention, the entire structure of the fine graphite powder does not necessarily need to be graphitized.
その目的により適宜黒鉛化されればよい１例えば特にす
ぐれた潤滑性を有する微粉の生成のためには、２８００
℃程度に熱処理温度を高め、核粒の黒鉛化度を高めるこ
とにより目的を達成しうる。即ち、微粉の用途に応じて
適宜加熱温度を制御すればよい、なお黒鉛化は、例えば
アルゴン等の不活性ガス下で行ってもよい、なお本発明
の黒鉛微粒の黒鉛化についてはＸ線回折により確認され
た。It may be graphitized as appropriate depending on the purpose. For example, in order to produce fine powder with particularly excellent lubricity, 2800
The purpose can be achieved by increasing the heat treatment temperature to about ℃ and increasing the degree of graphitization of the core grains. That is, the heating temperature may be controlled as appropriate depending on the use of the fine powder. Graphitization may be performed under an inert gas such as argon. Graphitization of the graphite fine particles of the present invention may be performed by X-ray diffraction. Confirmed by.
〈発明の効果）
本発明により従来は製造できなかった表面が平滑で径が
０．１〜２ＪＬｍの球状黒鉛微粉の供給が可能となった
。この黒鉛微粉は潤滑性、導電性、熱伝導性にすぐれ、
ビデオテープのバックコート、導電性インキ、トナー等
各種の用途に好適である。<Effects of the Invention> According to the present invention, it has become possible to supply fine spherical graphite powder with a smooth surface and a diameter of 0.1 to 2 JLm, which could not be produced conventionally. This fine graphite powder has excellent lubricity, electrical conductivity, and thermal conductivity.
Suitable for various uses such as back coats for video tapes, conductive inks, and toners.
実施例：
ヒーターで外部より１３００℃に加熱された内径１００
躊／１１、長さｌｏｏｏｍ／鵬の加熱管に、次の条件に
よりベンゼンと水素ガスを１時間噴霧導入した。Example: Inner diameter 100 heated to 1300℃ from the outside with a heater
Benzene and hydrogen gas were sprayed into a heating tube with a length of 11 mm and a length of 10 mm for 1 hour under the following conditions.
ＣｂＨｂ ３０ｇ／分
水素 ３０９／分
Ｃ６Ｈ６と水素との接触時間 ３秒
その結果加熱管の後にもうけた捕集管に８００ｇの炭素
微粉を得た。この炭素微粉を高純度アルゴン通気下、２
５００℃に加熱して、本発明の球状黒鉛微粉を得た。得
られた炭素微粉および球状黒鉛微粉の特性を表に示す。CbHb 30 g/min Hydrogen 309/min Contact time between C6H6 and hydrogen 3 seconds As a result, 800 g of fine carbon powder was obtained in a collecting tube placed after the heating tube. This fine carbon powder was heated under high-purity argon gas for 2 hours.
The mixture was heated to 500°C to obtain fine spherical graphite powder of the present invention. The properties of the obtained carbon fine powder and spherical graphite fine powder are shown in the table.
（１： １）の混合ガスにより１時間噴霧導入した。A mixed gas of (1:1) was sprayed for 1 hour.
０６Ｈｂ １０ｇ／分水素とＣ
Ｈ４との混合ガス ３０ｐ／分その結果捕集管に７５０
ｇの炭素微粉を得た。この炭素微粉を実施例１と同様に
処理して球状黒鉛化微粉を得た。炭素微粉および球状黒
鉛化微粉の特性を表に示す。06Hb 10g/min Hydrogen and C
Mixed gas with H4 30p/min resulting in 750p in the collection tube
g of fine carbon powder was obtained. This fine carbon powder was treated in the same manner as in Example 1 to obtain a spheroidal graphitized fine powder. The properties of the carbon fine powder and the spheroidal graphitized fine powder are shown in the table.
実施例２：
実施例１において、０６Ｈ６にその０．００１重量％の
表面が酸化された鉄微粉（粒径５０〜１５０人）を添加
した以外、実施例１と同様に処理して最初の加熱におい
て１０００ｇの炭素微粉を、さらに炭素微粉の加熱によ
り球状黒鉛化微粉を得た。それぞれの特性を表に示す。Example 2: The first heating was performed in the same manner as in Example 1, except that 0.001% by weight of surface-oxidized iron fine powder (particle size 50-150) was added to 06H6. 1000 g of carbon fine powder was further heated to obtain spheroidal graphitized fine powder. The characteristics of each are shown in the table.
実施例３：
実施例１と同様の加熱管に、次の条件により鉄微粉０．
０１重量％を含むベンゼンを水素と（Ｈ４宍
応用例１：
実施例２で得られた黒鉛化微粉５０重量部にフェノール
樹脂（カネポー製ベルパール５８９０） ５０重量部を
混合後混練し、これをポリエステルフィルム上に塗布後
、乾燥して厚さ２０．ｕ、ｍの導電性塗膜を作成した。Example 3: A heating tube similar to that of Example 1 was coated with 0.0% fine iron powder under the following conditions.
01% by weight of benzene with hydrogen (H4 Shishi Application Example 1: 50 parts by weight of graphitized fine powder obtained in Example 2 was mixed with 50 parts by weight of phenol resin (Bell Pearl 5890 manufactured by Kanepo), then kneaded, and this was mixed to form polyester. After coating on the film, it was dried to form a conductive coating film with a thickness of 20.m.
得られた膜の面積抵抗は２０Ω／口（ｃｍｚ）であった
。The sheet resistance of the obtained membrane was 20 Ω/mouth (cmz).
参考
カーボンブラックで最も導電性のあるケッチエンブラッ
ク（ライオンアクゾＥＣＤＪ−６００）をいれた塗膜の
抵抗値は２０〜２５Ω／口であった。The resistance value of the coating film containing Ketchien Black (Lion Akzo ECDJ-600), which is the most conductive of the reference carbon blacks, was 20 to 25 Ω/mouth.
※粒径は走査型電子顕微鏡による観察により判定。*Particle size is determined by observation using a scanning electron microscope.
応用例２：
実施例２で得られた黒鉛化微粉５０重量部に、フェノー
ル樹脂（カネポー製ベルパール５８７０）５０重量部、
ＭＥＫ １００重量部を混合混練したのち、該混線物
をガラス板上に厚さｔｏｇ塗布した後、硬化させて塗膜
を作成した。この塗膜の摩擦係数を測定したところ、ｐ
＝ ０．３であった。Application example 2: To 50 parts by weight of the graphitized fine powder obtained in Example 2, 50 parts by weight of phenol resin (Bell Pearl 5870 manufactured by Kanepo),
After mixing and kneading 100 parts by weight of MEK, the mixture was coated on a glass plate to a thickness of tog, and then cured to form a coating film. When the friction coefficient of this coating film was measured, it was found that p
= 0.3.
参
考
平均径２ｐの黒鉛粉（粉砕品）を同じ条件でぃれたもの
の、Ｗは０．３５であった。When graphite powder (pulverized product) with a reference average diameter of 2p was dried under the same conditions, W was 0.35.
応用例３：
実施例１で得られた本発明の段状炭素微粉にフェノール
樹脂（カネポー製ベルパール５８９０）３０重量部、エ
タノール１５０重量部を加え、参考例１と同様にして厚
さ３ｆｉＬｍの塗膜を作成した。その結果、目視により
可視光を全く通さない炭素塗膜が得られた。Application Example 3: Add 30 parts by weight of phenol resin (Bell Pearl 5890 manufactured by Kanepo) and 150 parts by weight of ethanol to the stepped carbon fine powder of the present invention obtained in Example 1, and apply a coating with a thickness of 3 filLm in the same manner as in Reference Example 1. A membrane was created. As a result, a carbon coating film was obtained that did not transmit any visible light when visually observed.
Claims (2)
〜１４００℃で加熱して有機化合物を熱分解させ、得ら
れた炭素質微粉を２０００℃以上で熱処理することを特
徴とする球状黒鉛微粉の製造方法。(2) Mixed gas of organic carbon compound and hydrogen at 1100℃
A method for producing spherical graphite fine powder, which comprises heating at 1400°C to thermally decompose an organic compound, and heat-treating the obtained carbonaceous fine powder at 2000°C or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63173961A JPH0226821A (en) | 1988-07-14 | 1988-07-14 | Spherical graphite fine powder and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63173961A JPH0226821A (en) | 1988-07-14 | 1988-07-14 | Spherical graphite fine powder and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226821A true JPH0226821A (en) | 1990-01-29 |
Family
ID=15970252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63173961A Pending JPH0226821A (en) | 1988-07-14 | 1988-07-14 | Spherical graphite fine powder and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008189790A (en) * | 2007-02-05 | 2008-08-21 | Tokai Carbon Co Ltd | Manufacturing method for carbon minute sphere |
| WO2011078145A1 (en) * | 2009-12-24 | 2011-06-30 | 東レ株式会社 | Carbon microparticle and process for production thereof |
-
1988
- 1988-07-14 JP JP63173961A patent/JPH0226821A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008189790A (en) * | 2007-02-05 | 2008-08-21 | Tokai Carbon Co Ltd | Manufacturing method for carbon minute sphere |
| WO2011078145A1 (en) * | 2009-12-24 | 2011-06-30 | 東レ株式会社 | Carbon microparticle and process for production thereof |
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