JPH0365580A - Composite heat-insulation material - Google Patents
Composite heat-insulation materialInfo
- Publication number
- JPH0365580A JPH0365580A JP19878989A JP19878989A JPH0365580A JP H0365580 A JPH0365580 A JP H0365580A JP 19878989 A JP19878989 A JP 19878989A JP 19878989 A JP19878989 A JP 19878989A JP H0365580 A JPH0365580 A JP H0365580A
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- insulation material
- heat
- felt
- iron core
- 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
- 239000002131 composite material Substances 0.000 title claims description 5
- 239000012774 insulation material Substances 0.000 title abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 95
- 239000010439 graphite Substances 0.000 claims abstract description 92
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 92
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 239000011810 insulating material Substances 0.000 claims description 7
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 16
- 230000006698 induction Effects 0.000 abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007770 graphite material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Chemical Vapour Deposition (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は炭素繊維断熱材の片面に炭素を浸透析出させた
複合体断熱材に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a composite insulation material in which carbon is immersed and dialyzed on one side of a carbon fiber insulation material.
炭素繊維断熱材は高温度域での使用を目的として黒鉛化
されたものも多く、黒鉛繊維断熱材とも呼ばれている。Many carbon fiber insulation materials are graphitized for use in high temperature ranges, and are also called graphite fiber insulation materials.
これには黒鉛繊維をニードルプレスした黒鉛繊維フェル
トと、この黒鉛繊維フェルトを積層し、これに樹脂含浸
を行い、成形焼成した黒鉛成形フェルトとがある。炉の
断熱材としては黒鉛焼成フェルトのみか、これと黒鉛繊
維フェルト（以下黒鉛フェルトと称す）の組み合わせた
ものが用いられている。These include graphite fiber felt made by needle pressing graphite fibers, and graphite molded felt made by laminating these graphite fiber felts, impregnating them with resin, shaping and firing them. As the heat insulating material for the furnace, graphite calcined felt alone or a combination of graphite fiber felt (hereinafter referred to as graphite felt) is used.
黒鉛繊維断熱材と黒鉛発熱体を用いた炉はセラミックス
や金属系の焼結炉としてその用途は広い。Furnaces using graphite fiber insulation and graphite heating elements have a wide range of uses as sintering furnaces for ceramics and metals.
しかしながら、黒鉛繊維断熱材はその物性上、次の如き
欠点がある。However, graphite fiber insulation has the following drawbacks due to its physical properties.
（１）黒鉛繊維の小片が炉内に飛び、炉内部を汚したり
、発熱体の短絡事故の原因となる。(1) Small pieces of graphite fiber fly into the furnace, contaminating the inside of the furnace, and causing a short circuit in the heating element.
（２）黒鉛繊維は直径が１０μｍ程度であり、黒鉛フェ
ルトや黒鉛成形フェルトにしても表面積が非常に大きく
炉中の０２やＨ２Ｏ、その他黒鉛と反応するガスと
は容易に反応し、消耗する。(2) Graphite fibers have a diameter of about 10 μm, and even graphite felt or graphite molded felt have a very large surface area.They easily react with O2, H2O, and other gases that react with graphite in the furnace, and are consumed.
（３）機械的強度が低く、機械的に損傷しやすい。(3) It has low mechanical strength and is easily damaged mechanically.
従って、従来この黒鉛繊維断熱材の欠点を種々の方法で
補っている。Therefore, various methods have been used to compensate for the drawbacks of graphite fiber insulation materials.
すなわち、上記（１）の欠点に対しては（１−１）黒鉛
成形フェルトの表面に有機溶剤にまぜた黒鉛粉を塗布し
て焼成する。That is, to solve the above drawback (1), (1-1) graphite powder mixed with an organic solvent is applied to the surface of graphite molded felt and fired.
（１−２）黒鉛成形フェルトの表面に黒鉛繊維で織った
黒鉛クロスを張り付ける。(1-2) Attach a graphite cloth woven from graphite fibers to the surface of the graphite molded felt.
などの方法を採用している。Methods such as these are adopted.
また上記（２）の欠点に対しては
（２−１）黒鉛繊維断熱材の炉内画側に黒鉛板を張り付
けて反応性ガスの黒鉛繊維への直接の接触を抑える。In addition, to address the drawback of (2) above, (2-1) a graphite plate is pasted on the furnace interior side of the graphite fiber insulation material to suppress direct contact of the reactive gas with the graphite fibers.
（２−２）炉内に黒鉛のケースを置き、その中に試料を
置くことにより、試料から発生する黒鉛との反応性のガ
スが直接黒鉛ｍ維に接触するのを避け、黒鉛１１１１と
反応させずに黒鉛ケースと反応させる。(2-2) By placing a graphite case in the furnace and placing the sample inside, the gas that is reactive with graphite generated from the sample is prevented from coming into direct contact with the graphite fibers, and reacts with graphite 1111. React with the graphite case without letting it react.
また上記（３）の欠点に対しては （３−１）黒鉛材で補強する。Also, regarding the drawback of (3) above, (3-1) Reinforce with graphite material.
等の方法が採用されている。The following methods have been adopted.
黒鉛繊維断熱材の物性上の欠点を補う従来の方法ではさ
らに種々の問題がある。Conventional methods for compensating for the deficiencies in physical properties of graphite fiber insulation materials have various problems.
即ち、前記（１−１）項に記載の方法においては黒鉛粉
膜が薄＜ （１００μｍオーダー）消耗しやすく、かつ
この膜が剥離しやすいものであり、また（１−２）項に
記載の方法においては黒鉛クロスが薄く、またポーラス
であるため消耗や剥離等で黒鉛クロスの効果が発揮され
る期間が極めて短いものである。That is, in the method described in item (1-1) above, the graphite powder film is thin < (on the order of 100 μm) and is easily consumed, and this film is easily peeled off. In this method, since the graphite cloth is thin and porous, the period during which the graphite cloth is effective due to wear and tear is extremely short.
さらに（２−１）項に記載の方法においては黒鉛板で黒
鉛繊維断熱材の表面を完全に覆うことは困難で、かつ黒
鉛板の熱容量が大きく、炉の熱効率、稼働率が悪くなる
。Furthermore, in the method described in item (2-1), it is difficult to completely cover the surface of the graphite fiber insulation material with the graphite plate, and the heat capacity of the graphite plate is large, resulting in poor thermal efficiency and operation rate of the furnace.
また（２−２）項記載の方法では、黒鉛ケースの熱容量
が大きく、炉の熱効率、稼働率が悪くなる。Furthermore, in the method described in item (2-2), the heat capacity of the graphite case is large, resulting in poor thermal efficiency and operating rate of the furnace.
本発明は、上述の如き欠点を解消すべく黒鉛繊維の飛散
を防止し、かつ断熱材の寿命を大幅に向上させることを
目的としてなしたものである。The present invention has been made with the object of preventing the scattering of graphite fibers and significantly improving the life of the heat insulating material in order to eliminate the above-mentioned drawbacks.
〔課題を解決するための手段）
本発明は上記目的を達成するためになしたもので、黒鉛
成形フェルト（或いは黒鉛フェルト）の少なくとも片面
にＣＶＤ法により析出した黒鉛を浸透させて一体となす
。[Means for Solving the Problems] The present invention has been made to achieve the above object, and is made by infiltrating at least one side of a graphite molded felt (or graphite felt) with graphite deposited by a CVD method.
以下本発明を図示の実施例にもとづいて説明する。 The present invention will be explained below based on the illustrated embodiments.
第１図は従来の黒鉛成形フェルトを示す外観図で、これ
は厚みｔの黒鉛成形フェルトを角形に切断したもので、
所要の繊維径、長さ、断面形状を有する黒鉛繊維をもっ
て各繊維を互いに絡めて厚さｔを有する板状の所要の大
きさに形成される。この各繊維間は互いに絡めているが
、その成形のために成形材である樹脂を炭化させて各繊
維の交点部分を接合して一体としている。Figure 1 is an external view showing a conventional graphite molded felt, which is a graphite molded felt with a thickness of t cut into squares.
Graphite fibers having a required fiber diameter, length, and cross-sectional shape are entwined with each other to form a plate-like sheet having a thickness t and a desired size. These fibers are entwined with each other, and in order to form the fibers, the resin used as the molding material is carbonized and the intersections of the fibers are joined to form a single body.
従って黒鉛成形フェルトｌはその表面、内部ともに均質
となしたもの、すなわち黒鉛繊維はＸ。Therefore, the graphite molded felt l is homogeneous both on the surface and inside, that is, the graphite fiber is X.
Ｙ、 Ｚの三方向に均質に配された集合成形体となっ
ている。It is an aggregate molded body uniformly arranged in three directions, Y and Z.
このようにして得た黒鉛成形フェルト１の片面、すなわ
ちこれを使用したとき、炉の内側となる面に黒鉛成形フ
ェルト１の表面から予め定めた適当な深さａまでＣＶＤ
法（Ｃｈｅｓ＋１ｃａｌ Ｖａｐｏｕｒ Ｄｅｐｏｓｉ
ｔｉｏｎ）で析出した黒鉛を黒鉛繊維間に浸透させ一体
とする。従ってこの黒鉛の含浸透により黒鉛成形フェル
トの炉の内側となる表面は黒鉛材のようになり、その反
対側面すなわち炉の外側にあたる側は従来の黒鉛成形フ
ェルトのままとなっている。従ってこの黒鉛を含浸透さ
せる深さａは黒鉛繊維と黒鉛との複合体となっている。One side of the graphite molded felt 1 thus obtained, that is, the surface that will be inside the furnace when used, is subjected to CVD to a predetermined appropriate depth a from the surface of the graphite molded felt 1.
Ches+1cal Vapor Deposit
The graphite precipitated in the process of ion) is infiltrated between the graphite fibers and integrated. Therefore, due to this impregnation of graphite, the surface of the graphite molded felt that will be inside the furnace becomes like a graphite material, and the opposite side, that is, the side that is outside the furnace, remains like a conventional graphite molded felt. Therefore, the depth a to which graphite is impregnated is a composite of graphite fibers and graphite.
上記ＣＶＤ法による黒鉛を析出する方法はメタンガス（
ＣＨ４）の熱分解が一般的に用いられる。黒鉛成形フェ
ルト表面をメタンガスの熱分解温度まで加熱してこれに
メタンガスを流すことにより黒鉛繊維内に黒鉛を析出す
ることができるものである。The method of depositing graphite by the above CVD method is methane gas (
Thermal decomposition of CH4) is commonly used. By heating the surface of the graphite molded felt to the thermal decomposition temperature of methane gas and flowing methane gas therethrough, graphite can be precipitated within the graphite fibers.
さらに、この黒鉛を析出する方法として抵抗加熱方式、
誘導加熱方式とがある。第３図は誘導加熱方式により本
発明複合体断熱材を製造する装置の一例を示すものであ
る。Furthermore, resistance heating method is used as a method to precipitate this graphite.
There is an induction heating method. FIG. 3 shows an example of an apparatus for producing the composite heat insulating material of the present invention using an induction heating method.
これは真空容器２内に黒鉛成形フェルト１を挿入し、上
下の支持体３．４にて支持させる。In this case, a graphite molded felt 1 is inserted into a vacuum container 2 and supported by upper and lower supports 3.4.
この時、支持される黒鉛成形フェル）１は筒状となし、
かつこの筒状に支持された黒鉛成形フェルトにて囲周さ
れた内部空間Ｒへ下部の支持体４を介してメタンガスを
供給し、真空容器２の一部例えば周側部に設けた排気口
５より排気する。At this time, the supported graphite molded fer) 1 is cylindrical,
Methane gas is supplied to the internal space R surrounded by the graphite molded felt supported in a cylindrical shape via the lower support 4, and an exhaust port 5 provided in a part of the vacuum container 2, for example, on the peripheral side. Exhaust more.
また上下の支持体３．４間においてかつこれに支持され
た黒鉛成形フェルト１の内側面と対向するようにして中
央に誘導コイル６を備えたリング状の鉄芯７を配設し、
この鉄芯７を上下両支持体３．４間を昇降移動させるよ
うになっている。勿論誘導コイル６には高周波電源に接
続されている。Further, a ring-shaped iron core 7 having an induction coil 6 at the center is disposed between the upper and lower supports 3.4 and facing the inner surface of the graphite molded felt 1 supported by the upper and lower supports 3.4,
This iron core 7 is moved up and down between the upper and lower supports 3.4. Of course, the induction coil 6 is connected to a high frequency power source.
このように構成された誘導炉を用いて黒鉛成形フェルト
表面に黒鉛を析出させるには、黒鉛成形フェルトを容器
内所定位置に支持し、かつ高周波電流を誘導コイルに流
すとリング状の誘導コイルにて励磁される磁気は鉄芯に
て集束され、誘導コイルと鉄芯と相対する黒鉛成形フェ
ルトの内面が加熱される。この状態でメタンガスを流下
させると成形フェルト内に黒鉛が析出される。この時、
高周波電流の強さ、通電時間、メタンガス流量等を調整
することにより、黒鉛を析出含浸される層１１の深さａ
が定められるものである。In order to deposit graphite on the surface of graphite molded felt using an induction furnace configured in this way, the graphite molded felt is supported at a predetermined position in the container, and when a high frequency current is passed through the induction coil, a ring-shaped induction coil is formed. The magnetism excited by the magnet is focused on the iron core, and the inner surface of the graphite molded felt facing the induction coil and the iron core is heated. When methane gas is allowed to flow down in this state, graphite is precipitated within the formed felt. At this time,
The depth a of the layer 11 where graphite is precipitated and impregnated can be determined by adjusting the intensity of the high-frequency current, the current application time, the methane gas flow rate, etc.
is determined.
このようにして誘導コイル、鉄芯を黒鉛成形フェルトの
上下方向に移動させることによりフェルト片面において
その全面に黒鉛析出含浸層が形成されるものである。In this way, by moving the induction coil and the iron core in the vertical direction of the graphite molded felt, a graphite precipitated impregnated layer is formed on the entire surface of one side of the felt.
なお、黒鉛繊維表面に黒鉛を析出させても同様の効果を
得ることができる。Note that the same effect can be obtained by depositing graphite on the surface of graphite fibers.
本発明によるときは、黒鉛成形フェルトの表面にＣＶＤ
法にて析出しに黒鉛を浸透させた層を所定深さにして一
体に成形しているため、これを炉内の断熱材として使用
しても、炉の内側表面よりの黒鉛繊維片の飛散を防止す
ると共に、断熱材の寿命を大幅に延ばすことができる等
の利点を有する。According to the present invention, CVD is applied to the surface of graphite molded felt.
Since the layer in which graphite is precipitated and penetrated by the method is integrally molded to a predetermined depth, even if this layer is used as a heat insulating material inside the furnace, graphite fiber pieces will not scatter from the inner surface of the furnace. It has the advantage of not only preventing this, but also greatly extending the life of the heat insulating material.
第１図は従来の黒鉛成形フェルトの外観図、第２図は本
発明の黒鉛成形フェルトの外観図、第３図は黒鉛成形フ
ェルト表面に析出黒鉛を含浸させる装置の一例を示す断
面説明図である。
ｌは黒鉛繊維フェルト、１１は黒鉛含浸透層、２は真空
容器、３，４は支持体、６は誘導コイル、 ７は鉄芯。Fig. 1 is an external view of a conventional graphite molded felt, Fig. 2 is an external view of the graphite molded felt of the present invention, and Fig. 3 is a cross-sectional explanatory diagram showing an example of a device for impregnating the surface of the graphite molded felt with precipitated graphite. be. 1 is a graphite fiber felt, 11 is a graphite impregnated layer, 2 is a vacuum container, 3 and 4 are supports, 6 is an induction coil, and 7 is an iron core.
Claims (1)
なくとも片面にＣＶＤ法により析出した黒鉛を浸透させ
て一体となしたことを特徴とする複合体断熱材。(1) A composite heat insulating material comprising a graphite fiber heat insulating material (for example, graphite molded felt) in which at least one side is impregnated with graphite precipitated by a CVD method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19878989A JPH0365580A (en) | 1989-07-31 | 1989-07-31 | Composite heat-insulation material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19878989A JPH0365580A (en) | 1989-07-31 | 1989-07-31 | Composite heat-insulation material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365580A true JPH0365580A (en) | 1991-03-20 |
Family
ID=16396935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19878989A Pending JPH0365580A (en) | 1989-07-31 | 1989-07-31 | Composite heat-insulation material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365580A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073243A1 (en) * | 1999-05-26 | 2000-12-07 | Kureha Kagaku Kogyo K. K. | Composite carbonaceous heat insulator |
| WO2023008392A1 (en) * | 2021-07-29 | 2023-02-02 | イビデン株式会社 | Thermal insulation material and method for producing thermal insulation material |
-
1989
- 1989-07-31 JP JP19878989A patent/JPH0365580A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073243A1 (en) * | 1999-05-26 | 2000-12-07 | Kureha Kagaku Kogyo K. K. | Composite carbonaceous heat insulator |
| WO2023008392A1 (en) * | 2021-07-29 | 2023-02-02 | イビデン株式会社 | Thermal insulation material and method for producing thermal insulation material |
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