JPH03208808A - Expanded graphite combined carbon material and production thereof - Google Patents
Expanded graphite combined carbon material and production thereofInfo
- Publication number
- JPH03208808A JPH03208808A JP2005546A JP554690A JPH03208808A JP H03208808 A JPH03208808 A JP H03208808A JP 2005546 A JP2005546 A JP 2005546A JP 554690 A JP554690 A JP 554690A JP H03208808 A JPH03208808 A JP H03208808A
- Authority
- JP
- Japan
- Prior art keywords
- expanded graphite
- molded body
- carbon material
- pitch
- resin
- 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 34
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 28
- 239000010439 graphite Substances 0.000 title claims abstract description 28
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 7
- 239000011295 pitch Substances 0.000 abstract description 10
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 4
- 239000004917 carbon fiber Substances 0.000 abstract description 4
- 239000011271 tar pitch Substances 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000007849 furan resin Substances 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 239000007770 graphite material Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011825 aerospace material Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000005545 pitch carbide Substances 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- 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、耐熱性、気密性、高熱伝導、軽量等の特性が
要求される分野の部材に用いられる膨張黒鉛複合炭素材
及びその製造法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an expanded graphite composite carbon material used for members in fields that require properties such as heat resistance, airtightness, high thermal conductivity, and light weight, and a method for manufacturing the same. Regarding.
（従来の技術）
コークス粉等の炭素骨材にタール、ピッチ等の結合剤を
加えて混練し、成形、焼成或いは更に黒鉛化した所謂人
造黒鉛材は、非酸化性雰囲気では約３０００℃付近まで
安定で高強度であり、かつ密度もＬ７〜２．１６／ａｎ
”と軽いため、高温で使用される各種部材に幅広く用い
られている。しかし開気孔が多数存在するため気密性に
問題があり。(Prior art) So-called artificial graphite material, which is made by adding binders such as tar and pitch to carbon aggregate such as coke powder, kneading it, forming it, firing it, or further graphitizing it, has a temperature up to around 3000°C in a non-oxidizing atmosphere. Stable, high strength, and density L7~2.16/an
Because it is light and light, it is widely used in various parts that are used at high temperatures.However, there are problems with airtightness because there are many open pores.
また材料中から各徨ガス等の不純物が出易いという欠点
があるため用途が制限されている。人造黒鉛材の曲げ強
度及び熱伝導度は９通常３０〜６０ＭＰａ及び８０〜１
３０Ｗ／ｍ−にであるが、よシ高い機械的強度及び熱伝
導性を要求される分野。In addition, there is a drawback that impurities such as various stray gases are easily released from the material, which limits its use. The bending strength and thermal conductivity of artificial graphite material are 9 usually 30 to 60 MPa and 80 to 1
30W/m-, but fields that require higher mechanical strength and thermal conductivity.
例えば宇宙航空材料や核融合炉の第一隔壁として好まし
くない。For example, it is undesirable as an aerospace material or the first partition of a nuclear fusion reactor.
そこで最近１機械的強度を大幅に向上できる材料として
、炭素繊維とピッチ炭化物等の炭素マトリックスとから
なる炭素繊維強化炭素複合材料（Ｃ／Ｃ複合材）が注目
されており９曲げ強度も１００〜２００ＭＰｇまでにな
っている。Recently, carbon fiber-reinforced carbon composite materials (C/C composites), which are made of carbon fibers and a carbon matrix such as pitch carbide, have been attracting attention as materials that can significantly improve mechanical strength. Up to 200MPg.
（発明が解決しようとする課題）
しかしながら、上記Ｃ／Ｃ複合材において、炭素繊維を
％に二次元的又は三次元的に織ったものは極めて高価で
あるという問題がある。また、かなり多数の開気孔が存
在するという欠点については改良されていない。熱伝導
度についても、Ｃ／Ｃ複合材では繊維よシもピッチ等の
マトリックスによる寄与が大きいため９機械的強度と共
に同時強度及び熱伝導度を有し、開気孔が殆んどなく気
密性に優れ、かつ高価な炭素繊維を用いることなく、安
価に製造可能な新たな炭素材及びその製造法を提供する
ことを目的とする。(Problems to be Solved by the Invention) However, in the above C/C composite material, there is a problem in that a material in which carbon fibers are woven two-dimensionally or three-dimensionally is extremely expensive. Furthermore, the disadvantage of the presence of a considerable number of open pores has not been improved. Regarding thermal conductivity, C/C composite materials have a large contribution from matrix such as fibers and pitch, so they have mechanical strength as well as simultaneous strength and thermal conductivity, and have almost no open pores and are airtight. The purpose of the present invention is to provide a new carbon material that is excellent and can be manufactured at low cost without using expensive carbon fibers, and a method for manufacturing the same.
（課題を解決するための手段）
本発明は、膨張黒鉛成形体にピッチ又は樹脂の炭化物を
含有させた膨張黒鉛複合炭素材及びその製造法に関する
。(Means for Solving the Problems) The present invention relates to an expanded graphite composite carbon material in which an expanded graphite molded body contains pitch or resin carbide, and a method for producing the same.
本発明において、膨張黒鉛は鱗状黒鉛やキッシュ黒鉛を
酸処理して層間化合物とし、これを急速加熱して得られ
る公知の粒子であり、その膨張倍率は８０以上、嵩密度
で１９／ｉ以下のものが好ましい。ピッチはタールピッ
チ、樹脂はフェノール樹脂、フラン樹脂のような炭化残
量の多いものが好ましい。In the present invention, expanded graphite is a known particle obtained by acid-treating scale graphite or quiche graphite to form an intercalation compound and rapidly heating it, and its expansion ratio is 80 or more and the bulk density is 19/i or less. Preferably. The pitch is preferably tar pitch, and the resin is preferably one with a large amount of carbonization, such as phenol resin or furan resin.
膨張黒鉛複合炭素材は、膨張黒鉛粒子を金型等に入れて
加圧して成形体とし、この成形体に液状にしたピッチ又
は樹脂を含浸し９次いで公知の方法で焼成炭化、更に必
要に応じて黒鉛化して得られる。含浸は公知の減圧含浸
法を複数回繰返して充分に膨張黒鉛粒子の間に浸透させ
るのが好ましい。必要に応じて更に加圧してもよい。含
浸量は膨張黒鉛成形体１００重量部に対して５〜１５０
重量部とされ、５重量未満では強度不足とな）。Expanded graphite composite carbon material is produced by placing expanded graphite particles in a mold etc. and pressurizing them to form a molded body, impregnating this molded body with liquid pitch or resin, followed by sintering and carbonization using a known method, and further, if necessary. It is obtained by graphitizing. For impregnation, it is preferable to repeat a known vacuum impregnation method multiple times to sufficiently penetrate between the expanded graphite particles. Further pressure may be applied if necessary. The amount of impregnation is 5 to 150 parts by weight per 100 parts by weight of the expanded graphite molded body.
If it is less than 5 parts by weight, the strength is insufficient).
１５０重量部を越えると熱伝導度が低下し９強度もそれ
以上向上しない。If it exceeds 150 parts by weight, the thermal conductivity will decrease and the strength will not improve any further.
（作用）
上記の構成とすることによ９９ミクロン以下の薄い黒鉛
粒子が成形加圧方向に揃って重なるので。(Function) With the above configuration, thin graphite particles of 99 microns or less are aligned and overlapped in the molding pressure direction.
成形面ではサブミクロンを越える開気孔は殆んどなく気
密性に優れる。成形方向と直角の方向には黒鉛結晶のａ
軸がきれいに揃うから熱伝導に優れたものになる。また
黒鉛粒子はピッチ又は樹脂の炭化物で結合され９人造黒
鉛材を凌駕する強度を保持する。There are almost no open pores larger than submicron on the molding surface, and the molding surface has excellent airtightness. In the direction perpendicular to the molding direction, there is a graphite crystal a.
Because the axes are neatly aligned, it has excellent heat conduction. In addition, the graphite particles are bonded with pitch or resin carbide and maintain strength that exceeds that of artificial graphite materials.
（実施例） 次に本発明の詳細な説明する。(Example) Next, the present invention will be explained in detail.
実施例１
平均膨張倍率１００の膨張黒鉛粒子１００重量部を金型
に入れて加圧成形し、１００ｍ角ＸＩＯ閣厚さでかさ密
度１．０ｇ／ａＩＩ８の成形体を得た。次にこの成形体
及び軟化点７０℃のタールピッチ５００重量部を容器に
入れ、真空ポンプでＩ Ｔｏｒｒ以下に減圧しながら２
５０℃に加熱して５分間保持後容器内を大気圧に戻した
。このＩ Ｔｏｒｒ以下に減圧保持して大気圧に戻す繰
作を更に２回繰返した後、容器内を２５０℃に保った状
態で成形体、を取出し冷却した。成形体にはピッチが約
５０重量部含浸されておシ、密度は約１．５９／−であ
つ九。Example 1 100 parts by weight of expanded graphite particles having an average expansion ratio of 100 were put into a mold and pressure-molded to obtain a molded article having a thickness of 100 m square and a bulk density of 1.0 g/aII8. Next, this molded body and 500 parts by weight of tar pitch with a softening point of 70°C were placed in a container, and the pressure was reduced to below I Torr using a vacuum pump, and the mixture was heated to 2 Torr or less.
After heating to 50°C and holding for 5 minutes, the inside of the container was returned to atmospheric pressure. After repeating this process of reducing the pressure to less than I Torr and returning it to atmospheric pressure two more times, the molded body was taken out and cooled while maintaining the inside of the container at 250°C. The molded body was impregnated with about 50 parts by weight of pitch and had a density of about 1.59/-.
このピッチ含浸膨張黒鉛成形体を周囲にコークス粉を充
填して炉内で１２００℃に焼成してピッチを炭化し、更
に２８００℃で黒鉛化処理し１曲げ強度１００ＭＰａ及
び熱伝導度３５０Ｗ／ｍ−Ｋを示す膨張黒鉛複合炭素材
を得た。This pitch-impregnated expanded graphite molded body was filled with coke powder around it, fired in a furnace at 1200°C to carbonize the pitch, and further graphitized at 2800°C to achieve a bending strength of 100 MPa and a thermal conductivity of 350 W/m- An expanded graphite composite carbon material exhibiting K was obtained.
実施例２
実施例１と同じ方法で同じ寸法及び密度の成形体を得、
この成形体とフラン樹脂としてフルフリルアルコール初
期縮合物（日立化成工業製、 ＶＦ３０２）の５００重
量部とを容器に入れ、ＩＴｏｒｒ以下に減圧しながら２
５０℃に加熱して５分間保持径大気圧に戻し、コンプレ
ッサによシ更に５に９／ｄの空気圧をかけて加圧する操
作を３回繰返した後成形体を取出した。成形体にはフラ
ン樹脂が約７０重量部含浸されており、密度祉約１．７
９／ｄで６つ九。このフラン樹脂含浸膨張黒鉛成形体を
実施例１と同様にして焼成炭化し９曲げ強度１８０ＭＰ
ａ及び熱伝導度１００Ｗ／ｍ−にの膨張黒鉛複合炭素材
を得た。Example 2 A molded body with the same dimensions and density was obtained by the same method as in Example 1,
This molded body and 500 parts by weight of furfuryl alcohol initial condensate (manufactured by Hitachi Chemical Co., Ltd., VF302) as a furan resin were placed in a container, and the mixture was heated at 2 Torr while reducing the pressure to below ITorr.
The molded product was heated to 50°C, returned to atmospheric pressure for 5 minutes, and then pressurized using a compressor by applying an air pressure of 5 to 9/d three times, and then the molded product was taken out. The molded body is impregnated with about 70 parts by weight of furan resin, and the density coefficient is about 1.7.
9/d with six nines. This furan resin-impregnated expanded graphite molded body was sintered and carbonized in the same manner as in Example 1 to obtain a bending strength of 180 MP.
An expanded graphite composite carbon material having a thermal conductivity of 100 W/m was obtained.
（発明の効果）
本発明によれば、従来の人造黒鉛材よシも機械的強度、
熱伝導性及び気密性に優れ、Ｃ／Ｃ複合材よシも安価な
膨張黒鉛複合炭素材が得られる。(Effects of the Invention) According to the present invention, mechanical strength and
An expanded graphite composite carbon material that has excellent thermal conductivity and airtightness and is cheaper than a C/C composite material can be obtained.
、、、 ７７Ｘ：。,,, 77X:.
Claims (2)
せた膨張黒鉛複合炭素材。1. An expanded graphite composite carbon material that contains pitch or resin carbide in an expanded graphite molded body.
脂５〜１５０重量部を含浸し，焼成炭化或いは更に黒鉛
化することを特徴とする請求項１記載の膨張黒鉛複合炭
素材の製造法。2. 2. The method for producing an expanded graphite composite carbon material according to claim 1, wherein 100 parts by weight of a molded body of expanded graphite particles is impregnated with 5 to 150 parts by weight of pitch or resin, and then sintered and carbonized or further graphitized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005546A JPH03208808A (en) | 1990-01-12 | 1990-01-12 | Expanded graphite combined carbon material and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005546A JPH03208808A (en) | 1990-01-12 | 1990-01-12 | Expanded graphite combined carbon material and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03208808A true JPH03208808A (en) | 1991-09-12 |
Family
ID=11614191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005546A Pending JPH03208808A (en) | 1990-01-12 | 1990-01-12 | Expanded graphite combined carbon material and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03208808A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016522151A (en) * | 2013-05-29 | 2016-07-28 | ジーティーエス カンパニー，リミテッド | Composite graphite heat dissipating material containing expanded graphite particles with high density compression processing and method for producing the same |
| CN110498685A (en) * | 2019-08-02 | 2019-11-26 | 中国航发北京航空材料研究院 | A kind of carbon fibre reinforced ceramics based composites preparation method |
-
1990
- 1990-01-12 JP JP2005546A patent/JPH03208808A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016522151A (en) * | 2013-05-29 | 2016-07-28 | ジーティーエス カンパニー，リミテッド | Composite graphite heat dissipating material containing expanded graphite particles with high density compression processing and method for producing the same |
| CN110498685A (en) * | 2019-08-02 | 2019-11-26 | 中国航发北京航空材料研究院 | A kind of carbon fibre reinforced ceramics based composites preparation method |
| CN110498685B (en) * | 2019-08-02 | 2021-12-03 | 中国航发北京航空材料研究院 | Preparation method of carbon fiber reinforced ceramic matrix composite |
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