JPS62213683A - Graphite crucible - Google Patents
Graphite crucibleInfo
- Publication number
- JPS62213683A JPS62213683A JP61055684A JP5568486A JPS62213683A JP S62213683 A JPS62213683 A JP S62213683A JP 61055684 A JP61055684 A JP 61055684A JP 5568486 A JP5568486 A JP 5568486A JP S62213683 A JPS62213683 A JP S62213683A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- graphite crucible
- silicon carbide
- aluminum
- 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.)
- Granted
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 25
- 229910002804 graphite Inorganic materials 0.000 title claims description 17
- 239000010439 graphite Substances 0.000 title claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 11
- 239000011819 refractory material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 229910052809 inorganic oxide Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はアルミニウム、銅などの非鉄金属溶湯およびフ
ラックスに対して耐用性の高い黒鉛坩堝に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a graphite crucible that is highly resistant to molten nonferrous metals such as aluminum and copper and flux.
（従来の技術）
従来、黒鉛坩堝は黒鉛、粘土からなるタレイボンド質と
、黒鉛、炭化珪素、珪素または珪素合金および低融無機
酸化物などの酸化防止剤に結合剤としてピッチ、タール
、フェノール樹脂などを配合したカーボンボンド質があ
る。(Prior art) Conventionally, graphite crucibles have been made using a clay bond material consisting of graphite and clay, an antioxidant such as graphite, silicon carbide, silicon or a silicon alloy, and a low melting inorganic oxide, and a binder such as pitch, tar, phenolic resin, etc. There is a carbon bond quality that contains
黒鉛坩堝はこれらの原料を混練し、成形し、還元性雰囲
気で焼成し、表面を酸化防止剤で被覆して製造したもの
であり、カーボンボンド質の方がタレイボンド質よりも
耐熱衝撃性および耐食性に優れている。しかしカーボン
ボンド質においてもアルミニウム合金などの溶解時に使
用するフラックスに対しては更に耐食性に優れることが
望まれている。アルミニウム合金等の溶解の際に使用す
る化学薬品は一般にフラックスと呼び、溶剤、融剤とも
いって融点が低い。フラックスは合金の脱ガス、酸化物
の除去、被覆による酸化防止、清浄、かす除去などを目
的として使用され、アルカリ金属やアルカリ土類金属の
ふっ素化合物、塩素化合物、炭酸塩、硝酸塩等を主成分
としているもので、融点の低い物質からなる（例えばふ
っ素化合物と塩素化合物を混合したものは５２０〜７８
０’Ｃ）。そのため坩堝の素地内に浸透して、素地を変
質し侵食していく。Graphite crucibles are manufactured by kneading these raw materials, molding them, firing them in a reducing atmosphere, and coating the surface with an antioxidant, and the carbon bond material has better thermal shock resistance and corrosion resistance than the tarley bond material. Excellent. However, even carbon bond materials are desired to have better corrosion resistance against fluxes used when melting aluminum alloys and the like. The chemical used to melt aluminum alloys and the like is generally called flux, which is also called a solvent or flux and has a low melting point. Flux is used for purposes such as degassing alloys, removing oxides, preventing oxidation by coating, cleaning, and removing residue.Fluxes are mainly composed of fluorine compounds, chlorine compounds, carbonates, nitrates, etc. of alkali metals and alkaline earth metals. It consists of substances with a low melting point (for example, a mixture of fluorine compounds and chlorine compounds has a temperature of 520 to 78
0'C). Therefore, it penetrates into the base material of the crucible, altering and eroding the base material.
本発明は以上述べた従来の黒鉛坩堝を改善したものであ
る。The present invention is an improvement over the conventional graphite crucible described above.
（本発明の構成）
本発明は酸窒化アルミニウム３〜６０重量部、炭素２０
〜７０重量部および炭化珪素３〜５０重川部に用部が他
の耐火性物質からなることを特徴とする黒鉛坩堝である
。(Structure of the present invention) The present invention consists of 3 to 60 parts by weight of aluminum oxynitride, 20 parts by weight of carbon
70 parts by weight of silicon carbide, 3 to 50 parts by weight of silicon carbide, and 3 to 50 parts by weight of another refractory material.
次に本発明を構成する原料とその使用割合について説明
する。Next, the raw materials constituting the present invention and their usage ratios will be explained.
酸窒化アルミニウムは窒化アルミニウムとアルミナとの
固溶体（ｍＡｌ□Ｏ，、ｎＡＩＮ）である。Aluminum oxynitride is a solid solution of aluminum nitride and alumina (mAl□O,, nAIN).
合成条件によって酸窒化アルミニウム中に金属アルミニ
ウム、アルミナ、窒化アルミニウムが随伴することがあ
る。酸窒化アルミニウムは良好な耐火性、耐熱性の他に
金属溶湯に対して優れた耐食性を有するので、殊に還元
性雰囲気中で安定して使用できるのである。使用中に酸
化したときはＡＩＺＯ，になる。Ａ１ｚ０３は炭化珪素
が酸化したときに生成するＳｉｎ、よりもフラックスに
対する耐食性は倭れている。本発明は酸窒化アルミニウ
ムを使用した黒鉛坩堝は酸窒化アルミニウムの酸化前に
おいても酸化後においても耐フラック性において従来の
黒鉛坩堝を改善したものが得られるという知見にもとづ
いてなされたものである。Depending on the synthesis conditions, metallic aluminum, alumina, or aluminum nitride may accompany aluminum oxynitride. Aluminum oxynitride has good fire resistance and heat resistance as well as excellent corrosion resistance against molten metal, so it can be used stably, especially in a reducing atmosphere. When it oxidizes during use, it becomes AIZO. A1z03 has lower corrosion resistance to flux than to Sin, which is produced when silicon carbide is oxidized. The present invention was made based on the knowledge that a graphite crucible using aluminum oxynitride can be improved in flux resistance over conventional graphite crucibles both before and after oxidation of aluminum oxynitride.
酸窒化アルミニウムの使用量は３〜６０重量部である。The amount of aluminum oxynitride used is 3 to 60 parts by weight.
３重量部以下では、この原料を添加した効果があられれ
ず、また６０重量部以上では他の構成原料の使用量が不
足するため、とくに耐熱衝撃性、耐酸化性、熱伝導性等
において満足なものが得られない。If it is less than 3 parts by weight, the effect of adding this raw material will not be achieved, and if it is more than 60 parts by weight, the amount of other constituent raw materials used will be insufficient, so it will not be possible to achieve satisfactory results, especially in terms of thermal shock resistance, oxidation resistance, thermal conductivity, etc. I can't get anything.
炭素は黒鉛坩堝に一般的に使用されている黒鉛を主原料
とし、結合剤の炭化によって生成される炭素も含まれる
。炭素は２０〜７０重量部使用する。The main raw material for carbon is graphite, which is commonly used in graphite crucibles, and also includes carbon produced by carbonization of binders. Carbon is used in an amount of 20 to 70 parts by weight.
２０重量部以下であると、耐熱衝撃性、熱伝導性等が不
足し、７０重量部以上であると耐酸化性が不足する。If it is 20 parts by weight or less, thermal shock resistance, thermal conductivity, etc. will be insufficient, and if it is 70 parts by weight or more, oxidation resistance will be insufficient.
炭化珪素は、耐熱性、耐食性、耐熱衝撃性、耐酸化性お
よび強度の付与剤として使用する。炭化珪素の骨材は黒
鉛坩堝の骨格として構造体の強度を保持する。炭化珪素
の微粉は急速な酸化によりシリカの保護膜を生成するの
で耐酸化性を付与させる。炭化珪素は３〜５０重量部使
用する。３重世部以下であると上記諸性質が不足し、５
０重量部以上であると耐熱衝撃性が不足する。Silicon carbide is used as an agent that imparts heat resistance, corrosion resistance, thermal shock resistance, oxidation resistance, and strength. The silicon carbide aggregate serves as the skeleton of the graphite crucible and maintains the strength of the structure. Fine powder of silicon carbide forms a protective film of silica through rapid oxidation, thereby imparting oxidation resistance. Silicon carbide is used in an amount of 3 to 50 parts by weight. If it is less than 3 layers, the above properties will be insufficient, and 5
If the amount is 0 parts by weight or more, thermal shock resistance will be insufficient.
以上の原料のほか、珪素または珪素合金、アルミニウム
粉末などの強度付与剤および酸化防止剤、炭化硼素や低
融無機酸化物などの酸化防止剤等を添加する。In addition to the above raw materials, silicon or a silicon alloy, a strength imparting agent such as aluminum powder, an antioxidant, an antioxidant such as boron carbide, a low melting inorganic oxide, etc. are added.
次に本発明の実施例について説明する。Next, examples of the present invention will be described.
実施例１
酸窒化アルミニウム１９重量部、炭素２９重量部、炭化
珪素３２重量部、その他２０重量部からなる組成の黒鉛
坩堝（３００番）を銅合金（ＢＣ−６）の溶解に使用し
た。従来品が７０回耐用に対して本発明品は８４回耐用
した。とくにフランクス接触面の耐食性向上が耐用向上
に寄与した。Example 1 A graphite crucible (No. 300) having a composition of 19 parts by weight of aluminum oxynitride, 29 parts by weight of carbon, 32 parts by weight of silicon carbide, and 20 parts by weight of other materials was used to melt a copper alloy (BC-6). The product of the present invention can be used 84 times, while the conventional product can be used 70 times. In particular, improved corrosion resistance on the Franks contact surface contributed to improved durability.
実施例２
酸窒化アルミニウム４１．５重量部、炭素３５重量部、
炭化珪素５．５重量部、その他１８重量部からなる組成
の黒鉛坩堝（１０００番）をアルミニウム合金（ＡＣ４
Ｇ）の溶解に使用した。従来品が３７０時間耐用に対し
本発明品は１１８０時間耐用し著しく向上した。Example 2 41.5 parts by weight of aluminum oxynitride, 35 parts by weight of carbon,
A graphite crucible (No. 1000) containing 5.5 parts by weight of silicon carbide and 18 parts by weight of other materials was placed in an aluminum alloy (AC4
G) was used for dissolving. While the conventional product lasted for 370 hours, the product of the present invention lasted for 1180 hours, which was a significant improvement.
実施例３
酸窒化アルミニウム２５．５重量部、炭素３０．１重歌
部、炭化珪素２５重量部、その他１９．４重量部からな
る組成の黒鉛坩堝（１０００番）をアルミニウム合金（
ＡＣ４Ｂ）の溶解に使用した。従来品が３１．５日耐用
であったのに対し本発明品は７０．３日耐用し著しく向
上した。Example 3 A graphite crucible (No. 1000) with a composition consisting of 25.5 parts by weight of aluminum oxynitride, 30.1 parts by weight of carbon, 25 parts by weight of silicon carbide, and 19.4 parts by weight of other materials was heated to an aluminum alloy (
AC4B). While the conventional product had a durability of 31.5 days, the product of the present invention had a durability of 70.3 days, which was a significant improvement.
以上示した通り、本発明品は従来の黒鉛坩堝の欠点を改
善し耐用が著しく向上するので産業上有用な発明である
。As shown above, the product of the present invention improves the drawbacks of conventional graphite crucibles and significantly improves durability, so it is an industrially useful invention.
Claims (1)
量部および炭化珪素３〜５０重量部に残部が他の耐火性
物質からなることを特徴とする黒鉛坩堝。1. A graphite crucible comprising 3 to 60 parts by weight of aluminum oxynitride, 20 to 70 parts by weight of carbon, 3 to 50 parts by weight of silicon carbide, and the balance consisting of other refractory materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61055684A JPH0635914B2 (en) | 1986-03-13 | 1986-03-13 | Graphite crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61055684A JPH0635914B2 (en) | 1986-03-13 | 1986-03-13 | Graphite crucible |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62213683A true JPS62213683A (en) | 1987-09-19 |
| JPH0635914B2 JPH0635914B2 (en) | 1994-05-11 |
Family
ID=13005726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61055684A Expired - Fee Related JPH0635914B2 (en) | 1986-03-13 | 1986-03-13 | Graphite crucible |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635914B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016003161A (en) * | 2014-06-17 | 2016-01-12 | 明智セラミックス株式会社 | Graphite crucible |
-
1986
- 1986-03-13 JP JP61055684A patent/JPH0635914B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016003161A (en) * | 2014-06-17 | 2016-01-12 | 明智セラミックス株式会社 | Graphite crucible |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0635914B2 (en) | 1994-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |