JPS6348807B2 - - Google Patents
Info
- Publication number
- JPS6348807B2 JPS6348807B2 JP53046770A JP4677078A JPS6348807B2 JP S6348807 B2 JPS6348807 B2 JP S6348807B2 JP 53046770 A JP53046770 A JP 53046770A JP 4677078 A JP4677078 A JP 4677078A JP S6348807 B2 JPS6348807 B2 JP S6348807B2
- Authority
- JP
- Japan
- Prior art keywords
- silicon
- graphite
- zirconium
- molded body
- layer
- 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.)
- Expired
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910002804 graphite Inorganic materials 0.000 claims description 19
- 239000010439 graphite Substances 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910026551 ZrC Inorganic materials 0.000 claims description 8
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920001568 phenolic resin Polymers 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 6
- 239000010419 fine particle Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005536 corrosion prevention Methods 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 12
- 239000011241 protective layer Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- C04B35/522—Graphite
-
- 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
-
- 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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
- C04B41/5057—Carbides
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Ceramic Products (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は、結合剤を塗布されたグラフアイト
−、人造グラフアイト微粒子または人造グラフア
イトに類似の材料で造られた微粒子を用いて形成
され且つ腐蝕防止層を有する成形体並びに焼結さ
れたかまたは熱処理されたグラフアイト成形体か
ら出発する、その製造方法にある。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a molded article formed using graphite coated with a binder, artificial graphite fine particles, or fine particles made of a material similar to artificial graphite, and having a corrosion-inhibiting layer. The invention consists in a process for producing the same, starting from a body and a sintered or heat-treated graphite shaped body.
グラフアイトより成る成形体は、化学工業に於
いて反応を高温で実施することを必要とする場合
に、るつぼまたはその他の容器として広く用いら
れている。 Shaped bodies made of graphite are widely used as crucibles or other containers in the chemical industry where reactions need to be carried out at high temperatures.
しかしながら炭素材で造られた器具は、酸素の
影響下に用いたりまたは例えば反応の際に水蒸気
が形成される場合に腐蝕し易いという欠点を有し
ている。かゝる不利な結果を避ける為に、炭素ま
たはグラフアイトで製造されたるつぼまたはその
他の器具を保護するべく耐腐蝕性物質で被覆する
試みが既に行われて来た。これを達成しようとす
る公知の従来技術に属する一つの方法は、成形体
の腐蝕作用を受ける表面に被覆層をもたらすもの
である。公知のこの方法によれば、該被覆層は成
形体の表面で炭化珪素または炭化ジルコニウムを
沈積することによつて形成される。他の公知の方
法では、プラズマを用いて炭化珪素または炭化ジ
ルコニウムを液化しそして反応容器または−器具
の保護すべき表面に吹きつけるものである。しか
しこの公知の方法には、非常に費用がかゝるとい
う欠点がある。更に重大な欠点は、この様に造ら
れた層が即ちるつぼまたはその他の器具の材料と
して用いられた炭素またはグラフアイトと形成さ
れた層の炭化珪素または炭化ジルコニウムとが異
なる熱膨脹係数を有していることである。例え
ば、一般に用いられる炭素材料の熱膨脹係数は室
温のもとで１・10-5〜１・10-6の大きさであり、
一方SiCのそれは6.6・10-6である。かゝる異なつ
た挙動が、SiC−層を既に塗布後の冷却の際に
度々破裂させてしまい、それ故に器具が所定の用
途に於いて非常に僅かの寿命しか有さないという
不利な原因に成つている。 However, devices made of carbon materials have the disadvantage that they are susceptible to corrosion when used under the influence of oxygen or when, for example, water vapor is formed during the reaction. To avoid such adverse consequences, attempts have already been made to coat crucibles or other instruments made of carbon or graphite with corrosion-resistant materials to protect them. One method known in the prior art for achieving this is to provide a coating layer on the corrosive surface of the molded body. According to this known method, the covering layer is formed by depositing silicon carbide or zirconium carbide on the surface of the molded body. Another known method uses a plasma to liquefy silicon carbide or zirconium carbide and spray it onto the surface of the reaction vessel or equipment to be protected. However, this known method has the disadvantage that it is very expensive. A further serious drawback is that the layers produced in this way, i.e. the carbon or graphite used as the material of the crucible or other device, and the silicon carbide or zirconium carbide of the formed layer have different coefficients of thermal expansion. It is that you are. For example, the coefficient of thermal expansion of commonly used carbon materials is in the range of 1·10 -5 to 1·10 -6 at room temperature.
On the other hand, that of SiC is 6.6・10 -6 . Such a different behavior has the disadvantage that the SiC layer often ruptures even during cooling after application and therefore the device has a very short service life in a given application. It is completed.
本発明の課題は、高い負荷のもとでも長い寿命
を有する塗布層を持つた、グラフアイト製成形体
並びにその製造方法を見出すことにある。更にこ
の方法は大きな成形体を造る為にも用いることが
できるべきである。 An object of the present invention is to find a molded article made of graphite and a method for producing the same, which has a coating layer that has a long service life even under high loads. Furthermore, the method should also be able to be used for producing large molded bodies.
この課題は、初めに述べた種類の成形体に、内
側の層から外側の層へ０原子％から（即ち、成形
体から）50原子％へ増加する珪素−またはジルコ
ニウム含有量で珪素またはジルコニウムが混入さ
れた上記成形体の材質より成る多種類の層を被覆
することによつて解決される。 The task is to apply silicon or zirconium to a shaped body of the type mentioned at the beginning with a silicon- or zirconium content that increases from 0 at. % to 50 at. % (i.e. from the shaped body) from the inner layer to the outer layer. This problem is solved by coating with multiple layers of mixed materials of the molded body.
この被覆され、保護層を有する成形体は以下の
方法で製造できる：
即ち、珪素−またはジルコニウム粉末をグラフ
アイト粉末含有のフエノールホルムアルデヒド樹
脂溶液中に懸濁させて95原子％〜50原子％の炭素
含有量を有する珪素−またはジルコニウム粉末の
多種類の懸濁液を造り、そして次いで成形体を最
初に最も少ない珪素−またはジルコニウム含有量
で且つ最も多い炭素含有量の懸濁液浴中に入れそ
して順次に続いて少ない炭素含有量の浴中に浸漬
し−その際成形体を各浸漬の後に乾燥しそして前
に浸漬した層の結合剤を乾燥する為に熱処理に委
ね−、その上で成形体を他の方法段階で粘結化す
る為に保護ガス雰囲気下に650〜850℃の間の温度
に加熱し、次いで炭化珪素または炭化ジルコニウ
ムを形成する為に速い加熱速度で1550〜1800℃の
温度に加熱しそして最後に室温に冷却することに
よつて製造される。 This coated shaped body with a protective layer can be produced in the following way: by suspending silicon or zirconium powder in a phenol formaldehyde resin solution containing graphite powder, containing 95 at. % to 50 at. % carbon. A variety of suspensions of silicon- or zirconium powder with a content of The shaped body is subsequently immersed in a bath with a low carbon content, with the shaped body being dried after each dipping and subjected to a heat treatment in order to dry the binder of the previously soaked layer. in another process step to a temperature between 650 and 850 °C under a protective gas atmosphere for caking, and then at a rapid heating rate to a temperature between 1550 and 1800 °C to form silicon carbide or zirconium carbide. and finally cooled to room temperature.
複数の保護層を有する本発明の成形体は、最も
外側の炭化珪素−または炭化ジルコニウム保護層
とグラフアイト成形体との間に炭化珪素−または
炭化ジルコニウム含有量が内側に徐々に減少して
行く各層を有しているので、その結果負荷および
寿命に関して所期の要求全てに叶い且つ激しい熱
交換の際にも全ての炭化珪素−または炭化ジルコ
ニウム保護層がグラフアイト成形体にしつかりと
付着されている。 In the molded article of the present invention having multiple protective layers, the silicon carbide or zirconium carbide content gradually decreases toward the inside between the outermost silicon carbide or zirconium carbide protective layer and the graphite molded article. As a result of the individual layers, all the intended requirements with respect to load and service life are met and even during intense heat exchange, all silicon carbide or zirconium carbide protective layers remain firmly attached to the graphite shaped body. There is.
実施例
最初にグラフアイト−および珪素粉末をフエノ
ール−ホルムアルデヒド樹脂のアルコール溶液に
種々の量で懸濁させる。その際溶液は以下の含有
物を有している：
懸濁物１：（Si：Ｃ＝0.2：１）
珪素量 278.4ｇ
フエノールホルムアルデヒド樹脂量 250.0ｇ
グラフアイト量 471.6ｇ
懸濁物２：（Si：Ｃ＝0.4：１）
珪素量 422.4ｇ
フエノールホルムアルデヒド樹脂量 250.0ｇ
グラフアイト量 327.6ｇ
懸濁物３：（Si：Ｃ＝0.6：１）
珪素量 510.4ｇ
フエノールホルムアルデヒド樹脂量 250.0ｇ
グラフアイト量 239.6ｇ
懸濁物４：（Si：Ｃ＝0.8：１）
珪素量 569.8ｇ
フエノールホルムアルデヒド樹脂量 250.0ｇ
グラフアイト量 180.2ｇ
懸濁物５：（Si：Ｃ＝１：１）
珪素量 612.5ｇ
フエノールホルムアルデヒド樹脂量 250.0ｇ
グラフアイト量 137.5ｇ
グラフアイト製成形体を最初に珪素の少ない懸
濁液に浸漬し、そこから引出しそして乾燥する。
その後に、最初に塗布された層の結合剤を硬化さ
せる為に、その成形体を熱処理に委ねる。かゝる
浸漬−、乾燥−および熱処理を、他の懸濁液を用
いて繰り返す。懸濁液の珪素含有量が徐々に増加
するので、被覆中の珪素含有量も増加する。この
増加は、外側層に於ける珪素含有量が、化学量論
量に相当する珪素：炭素の割合に成るまでであ
る。最後の層を塗布した後に、層状に被覆された
成形体を、結合剤を粘結化する為に、保護ガス雰
囲気中で約700℃に加熱し、次いで珪素と成形体
の炭素とを反応させ炭化珪素とする為に約1800℃
の温度にする。Examples Graphite and silicon powders are first suspended in varying amounts in an alcoholic solution of phenol-formaldehyde resin. The solution then contains the following: Suspension 1: (Si:C=0.2:1) Silicon content 278.4g Phenol formaldehyde resin content 250.0g Graphite content 471.6g Suspension 2: (Si :C=0.4:1) Amount of silicon 422.4g Amount of phenol formaldehyde resin 250.0g Amount of graphite 327.6g Suspension 3: (Si:C=0.6:1) Amount of silicon 510.4g Amount of phenol formaldehyde resin 250.0g Amount of graphite 239.6 g Suspension 4: (Si:C=0.8:1) Amount of silicon 569.8g Amount of phenol formaldehyde resin 250.0g Amount of graphite 180.2g Suspension 5: (Si:C=1:1) Amount of silicon 612.5g Phenol formaldehyde Amount of resin: 250.0 g Amount of graphite: 137.5 g A graphite molding is first immersed in a silicon-poor suspension, withdrawn from there and dried.
Thereafter, the molded body is subjected to a heat treatment in order to harden the binder of the first applied layer. Such soaking, drying and heat treatment are repeated with other suspensions. As the silicon content of the suspension increases gradually, the silicon content in the coating also increases. This increase is until the silicon content in the outer layer reaches a stoichiometric silicon:carbon ratio. After the application of the last layer, the layered shaped body is heated to approximately 700° C. in a protective gas atmosphere in order to caking the binder and then to cause the silicon to react with the carbon of the shaped body. Approximately 1800℃ to make silicon carbide
temperature.
珪素の替わりにジルコニウムを使用した場合に
も、上記の珪素の場合とまつたく同様な操作およ
びその条件にて実施できる。 Even when zirconium is used instead of silicon, it can be carried out under exactly the same operations and conditions as in the case of silicon.
Claims (1)
フアイト微粒子または人造グラフアイトに類似の
材料から造られた微粒子を用いて成形され且つ腐
蝕防止層を有する成形体において、成形体が、内
側の層から外側の層へ０原子％から（即ち、成形
体から）50原子％へ増加する珪素−またはジルコ
ニウム含有量に珪素またはジルコニウムを混入し
た成形体の材質より成る多種類の層によつて被覆
されていることを特徴とする、上記腐蝕防止層を
有するグラフアイト成形体。 ２ 珪素−またはジルコニウム粉末をグラフアイ
ト粉末含有のフエノールホルムアルデヒド樹脂溶
液中に懸濁させて95原子％〜50原子％の炭素含有
量を有する珪素−またはジルコニウム粉末の多種
類の懸濁液を造り、そして次いで成形体を最切に
最も少ない珪素−またはジルコニウム含有量で且
つ最も多い炭素含有量の懸濁液浴中に入れそして
順次に続いて少ない炭素含有量の浴中に浸漬し−
その際成形体を各浸漬の後に乾燥しそして前に浸
漬した層の結合剤を乾燥する為に熱処理に委ね
−、その上で成形体を他の方法段階で粘結化する
為に保護ガス雰囲気下に650〜850℃の間の温度に
加熱し、次いで炭化珪素または炭化ジルコニウム
を形成する為に速い加熱速度で1550〜1800℃の温
度に加熱しそして最後に室温に冷却することを特
徴とする、結合剤を塗布したグラフアイト−、人
造グラフアイト微粒子または人造グラフアイトに
類似の材料から造られた微粒子を用いて形成され
且つ腐蝕防止層を有する成形体であつて、成形体
が内側の層から外側の層へ０原子％から（即ち、
成形体から）50原子％へ増加する珪素−またはジ
ルコニウム含有量で珪素またはジルコニウムを混
入した成形体の材質より成る多種類の層によつて
被覆されている上記成形体の製造方法。[Scope of Claims] 1. A molded body formed using graphite coated with a binder, artificial graphite fine particles, or fine particles made from a material similar to artificial graphite, and having a corrosion-preventing layer. multiple layers of molded body materials with silicon or zirconium incorporated therein, with a silicon- or zirconium content increasing from 0 at. % to 50 at. % (i.e. from the molded body) from the inner layer to the outer layer. A graphite molded article having the above-mentioned corrosion prevention layer, characterized in that the graphite molded article is coated with. 2. Suspending silicon or zirconium powder in a phenol formaldehyde resin solution containing graphite powder to produce various suspensions of silicon or zirconium powder having a carbon content of 95 at % to 50 at %; The shaped body is then placed first in a suspension bath with the lowest silicon or zirconium content and the highest carbon content, and then immersed in succession in a bath with the lowest carbon content.
The shaped body is then dried after each immersion and subjected to a heat treatment in order to dry the binder of the previously dipped layer - and then subjected to a protective gas atmosphere for caking the shaped body in a further process step. characterized by heating to a temperature between 650-850℃, then heating to a temperature between 1550-1800℃ at a fast heating rate to form silicon carbide or zirconium carbide, and finally cooling to room temperature. , graphite coated with a binder, artificial graphite fine particles or fine particles made from a material similar to artificial graphite, and a molded body having a corrosion-preventing layer, the molded body having an inner layer. from 0 atomic % to the outer layer (i.e.
A process for the production of a molded body as described above, which is coated with multiple layers of silicon- or zirconium-doped molded body material with a silicon- or zirconium content increasing to 50 atom % (from the molded body).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772718142 DE2718142C3 (en) | 1977-04-23 | 1977-04-23 | Process for the production of shaped bodies formed from graphite or from a graphite-like material with a protective layer made of carbide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53133209A JPS53133209A (en) | 1978-11-20 |
| JPS6348807B2 true JPS6348807B2 (en) | 1988-09-30 |
Family
ID=6007097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4677078A Granted JPS53133209A (en) | 1977-04-23 | 1978-04-21 | Graphite moldings with anticorrosive layer and method of their manufacture |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS53133209A (en) |
| BE (1) | BE866311A (en) |
| DE (1) | DE2718142C3 (en) |
| FR (1) | FR2387923A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0009148B1 (en) * | 1978-09-02 | 1983-03-02 | Schunk & Ebe GmbH | Joint endoprosthesis |
| DE2852410C2 (en) * | 1978-12-04 | 1981-12-03 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | Process and device for the production of silicon carbide molded bodies |
| DE3005587A1 (en) * | 1980-02-15 | 1981-08-20 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | METHOD FOR PRODUCING MOLDED BODIES |
| JPS63175745A (en) * | 1987-01-16 | 1988-07-20 | Mitsubishi Pencil Co Ltd | Production of carbon furnace for atomic absorption analysis |
| GB2432830A (en) | 2005-12-02 | 2007-06-06 | Morganite Elect Carbon | Formation of thermally anisotropic carbon material |
| FR2935636B1 (en) * | 2008-09-05 | 2011-06-24 | Commissariat Energie Atomique | MATERIAL WITH MULTILAYER ARCHITECTURE, DEDICATED TO CONTACT WITH LIQUID SILICON |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5346769A (en) * | 1976-10-08 | 1978-04-26 | Ocean Cable Co Ltd | Automatic measuring apparatus for powdered substance |
-
1977
- 1977-04-23 DE DE19772718142 patent/DE2718142C3/en not_active Expired
-
1978
- 1978-04-19 FR FR7811530A patent/FR2387923A1/en active Granted
- 1978-04-21 JP JP4677078A patent/JPS53133209A/en active Granted
- 1978-04-24 BE BE187060A patent/BE866311A/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5346769A (en) * | 1976-10-08 | 1978-04-26 | Ocean Cable Co Ltd | Automatic measuring apparatus for powdered substance |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2718142A1 (en) | 1978-11-16 |
| BE866311A (en) | 1978-08-14 |
| DE2718142B2 (en) | 1979-03-08 |
| DE2718142C3 (en) | 1979-10-31 |
| FR2387923B1 (en) | 1984-01-27 |
| JPS53133209A (en) | 1978-11-20 |
| FR2387923A1 (en) | 1978-11-17 |
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