JP2642561B2 - Carbon jig for firing Si-SiC - Google Patents
Carbon jig for firing Si-SiCInfo
- Publication number
- JP2642561B2 JP2642561B2 JP4186711A JP18671192A JP2642561B2 JP 2642561 B2 JP2642561 B2 JP 2642561B2 JP 4186711 A JP4186711 A JP 4186711A JP 18671192 A JP18671192 A JP 18671192A JP 2642561 B2 JP2642561 B2 JP 2642561B2
- Authority
- JP
- Japan
- Prior art keywords
- jig
- sic
- firing
- carbon
- carbon jig
- 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 - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ｓｉ−ＳｉＣ質焼結体
を焼成する際に用いるカーボン製治具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon jig used for firing a Si--SiC sintered body.
【０００２】[0002]
【従来の技術】従来、炭化珪素（ＳｉＣ）質焼結体は、
その優れた耐熱性、耐火性から工業上重要な地位を占め
ており、例えば碍子、衛生陶器、食器、額縁および陶管
等の陶磁器や、タイルなどの焼成用棚板として多用され
ている。このようなＳｉＣ質焼結体の中で、ＳｉＣとＳ
ｉを構成成分として含むＳｉ−ＳｉＣ質焼結体が知られ
ており、上記したような陶磁器焼成用のローラー、ビー
ム等のバー材（棒状体）として用いられている。2. Description of the Related Art Conventionally, silicon carbide (SiC) -based sintered bodies have been
Due to its excellent heat resistance and fire resistance, it occupies an industrially important position, and is widely used, for example, as ceramics such as insulators, sanitary ware, tableware, picture frames and ceramic tubes, and as shelves for firing tiles and the like. Among such SiC-based sintered bodies, SiC and S
A Si-SiC sintered body containing i as a component is known, and is used as a bar material (rod-like body) such as a roller or a beam for firing ceramics as described above.
【０００３】このＳｉ−ＳｉＣ質焼結体は、ＳｉＣ粉
体、有機質バインダーおよび水分または有機溶剤を含有
し、要すればカーボン粉を更に含有した原料を用い、こ
れを混練して成形体を成形した後、成形体および金属Ｓ
ｉを、減圧の不活性ガス雰囲気又は真空中に置いて焼成
することにより、成形体中に金属Ｓｉが含浸し、製造さ
れる。[0003] This Si-SiC sintered body contains a SiC powder, an organic binder and water or an organic solvent, and if necessary, uses a raw material further containing carbon powder, and kneads the raw material to form a molded body. After forming, the compact and metal S
By sintering i in a reduced-pressure inert gas atmosphere or vacuum, the compact is impregnated with metallic Si to produce the compact.
【０００４】[0004]
【発明が解決しようとする課題】上記のようなＳｉ−Ｓ
ｉＣ質焼結体の製造に際しては、成形体の支持用あるい
は焼成用のルツボ保護を目的として、各種の治具、保護
シート治具が用いられている。しかしながら、このよう
な治具は高温下で使用されるため劣化し易いという問題
があった。特に使用の際、Ｓｉ−ＳｉＣ質焼結体および
金属Ｓｉ溶融物と接触するような治具の場合には、治具
の材質たるカーボン（Ｃ）とＳｉが反応することによっ
て治具がＳｉＣ化して劣化するため、１〜２回の使用で
治具にクラックが入り、使用できなくなるという問題が
あった。そこで、本発明者は、上記従来の問題を解決す
るため種々検討・実験を繰り返したところ、カーボン製
治具の特性のうち、嵩密度が関係することを見出し、本
発明に至ったものである。SUMMARY OF THE INVENTION The above-mentioned Si-S
In manufacturing an iC-based sintered body, various jigs and protection sheet jigs are used for the purpose of supporting a formed body or protecting a crucible for firing. However, there is a problem that such a jig is easily deteriorated because it is used at a high temperature. In particular, in the case of a jig which is in contact with the Si-SiC sintered body and the molten metal Si during use, the jig is converted into SiC by reacting carbon (C), which is a material of the jig, with Si. Therefore, there is a problem that the jig is cracked after being used once or twice and cannot be used. Therefore, the present inventor repeated various studies and experiments in order to solve the above-mentioned conventional problems, and found that among the characteristics of the carbon jig, the bulk density was involved, and reached the present invention. .
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明によれ
ば、Ｓｉ−ＳｉＣ質焼結体および金属Ｓｉ溶融物と接触
して使用される焼成用のカーボン製治具であって、嵩密
度が１．７５〜１．９０g/cm3 であることを特徴とする
Ｓｉ−ＳｉＣ焼成用カーボン製治具、が提供される。な
お、本発明では、治具がグラファイトからなっているこ
とが好ましく、また、ＣＩＰ成形または押出成形により
作製されたものであることが好ましい。That is, according to the present invention, there is provided a firing jig made of carbon which is used in contact with a Si-SiC sintered body and a molten metal Si, and has a bulk density. A carbon jig for firing Si—SiC, which is 1.75 to 1.90 g / cm 3 , is provided. In the present invention, the jig is preferably made of graphite, and is preferably made by CIP molding or extrusion molding.
【０００６】[0006]
【作用】本発明のＳｉ−ＳｉＣ焼成用カーボン製治具
は、Ｓｉ−ＳｉＣ質焼結体および金属Ｓｉ溶融物と接触
して使用されるもので、その嵩密度を１．７５〜１．９
０g/cm3 と特定したものである。このような治具は、Ｓ
ｉ−ＳｉＣ質焼結体の焼成の際、数十回繰り返し使用さ
れてもＣ−Ｓｉの反応によって治具が劣化することがな
い。The carbon jig for firing Si-SiC according to the present invention is used in contact with a Si-SiC sintered body and a molten metal Si, and has a bulk density of 1.75 to 1.9.
It is specified as 0 g / cm 3 . Such a jig is S
During firing of the i-SiC sintered body, the jig does not deteriorate due to the reaction of C-Si even if it is repeatedly used several tens of times.
【０００７】本発明のカーボン製治具の嵩密度が１．７
５g/cm3 未満の場合には、１〜２回の使用で治具が劣化
してクラックが入るなどの欠点がある。一方、嵩密度が
１．９０g/cm3 を超えると、大型のカーボン製治具が
作製困難となり、部位の密度差（例えば、ルツボの側
面と下面のわずかな密度差）に起因してクラックを生ず
る場合がある、等の問題がある。また、本発明の治具は
カーボンからなるものであるが、そのうちグラファイト
製が耐熱性、耐腐食性および加工の容易性により特に好
ましい。なお、カーボン製治具の表面に、反応防止用と
して窒化ホウ素（ＢＮ）粉等をコートしてもよい。The bulk density of the carbon jig of the present invention is 1.7.
If it is less than 5 g / cm 3 , there is a drawback that the jig deteriorates and cracks occur after one or two uses. On the other hand, if the bulk density exceeds 1.90 g / cm 3 , it becomes difficult to produce a large carbon jig, and cracks may occur due to the difference in density between portions (for example, a slight difference in density between the side and bottom surfaces of the crucible). May occur. The jig of the present invention is made of carbon. Of these, graphite is particularly preferable because of its heat resistance, corrosion resistance, and ease of processing. The surface of the carbon jig may be coated with boron nitride (BN) powder or the like for reaction prevention.
【０００８】本発明のカーボン製治具は、原料のカーボ
ンを所定の粒度に粉砕した後、結合材とともに混練し、
所定形状に成形することにより製造することができる。
成形方法としては特に限定されないが、ＣＩＰ成形、押
出成形が好ましい。即ち、ＣＩＰ成形の場合には、均質
かつ緻密で強度の大きな治具が作製でき、また押出成形
では、多少緻密性には欠けるものの耐熱衝撃性に優れた
治具が作製できる。[0008] The carbon jig of the present invention, after pulverizing the raw material carbon to a predetermined particle size, kneading with the binder,
It can be manufactured by molding into a predetermined shape.
The molding method is not particularly limited, but CIP molding and extrusion molding are preferred. That is, in the case of the CIP molding, a uniform, dense and high-strength jig can be manufactured, and in the extrusion molding, a jig excellent in thermal shock resistance, though somewhat lacking in the denseness, can be manufactured.
【０００９】[0009]
【実施例】以下、本発明を実施例に基づいて更に詳細に
説明するが、本発明はこれらの実施例に限られるもので
はない。 （実施例）原料のグラファイト、カーボンを微粉砕し、
結合材とともに混練した後、ＣＩＰ成形、型込成形およ
び押出成形により作製された日本カーボン（株）製の各
種カーボン成形品を用いて、図１の形状の治具を作成し
た。この治具に金属Ｓｉを配置し、真空中１８００℃ま
での加熱・冷却を２０回繰り返し、治具がＳｉと反応し
て劣化する状態を検査した。その結果を表１に示す。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples. (Example) Raw material graphite and carbon were finely pulverized,
After kneading with the binder, a jig having the shape shown in FIG. 1 was produced using various carbon molded products manufactured by Nippon Carbon Co., Ltd., which were produced by CIP molding, die molding and extrusion molding. Metallic Si was placed on this jig, and heating and cooling to 1800 ° C. in a vacuum were repeated 20 times, and the state in which the jig reacted with Si and deteriorated was inspected. Table 1 shows the results.
【００１０】[0010]
【表１】 [Table 1]
【００１１】表１から明らかなように、型込成形品は全
て１回の使用で治具にクラックが入ったのに対し、ＣＩ
Ｐ成形品および押出成形品はその嵩密度が１．７５g/cm
3 以上のもののみ２０回の繰り返し使用であっても、治
具にクラックは発生せず、耐久性に優れていることが判
明した。また、これら治具の表面にＢＮ等の反応防止剤
をコートしても使用上問題を生じず、同様に治具の長寿
命化の効果を得ることができる。As is clear from Table 1, all of the molded articles had cracks in the jig in a single use, whereas CI
P-molded product and extruded product have a bulk density of 1.75 g / cm
Even when only three or more of them were used repeatedly 20 times, no crack was generated in the jig, and it was found that the jig was excellent in durability. Even if the surface of these jigs is coated with a reaction inhibitor such as BN, there is no problem in use, and similarly, the effect of extending the life of the jig can be obtained.
【００１２】[0012]
【発明の効果】以上説明した通り、本発明の治具によれ
ば、Ｓｉ−ＳｉＣ質焼結体の焼成の際、数十回繰り返し
使用されても、劣化することがなく、耐久性に極めて優
れるという顕著な効果を奏する。As described above, according to the jig of the present invention, when the Si-SiC sintered body is fired, even if it is repeatedly used several tens of times, it does not deteriorate and has extremely high durability. It has a remarkable effect of being excellent.
【図１】実施例に用いた形状の治具を示す概要図であ
る。FIG. 1 is a schematic view showing a jig having a shape used in an embodiment.
Claims (3)
融物と接触して使用される焼成用のカーボン製治具であ
って、嵩密度が１．７５〜１．９０g/cm3 であることを
特徴とするＳｉ−ＳｉＣ焼成用カーボン製治具。1. A firing carbon jig used in contact with a Si—SiC sintered body and a molten metal Si, having a bulk density of 1.75 to 1.90 g / cm 3 . A carbon jig for firing Si-SiC, characterized in that:
記載のＳｉ−ＳｉＣ焼成用カーボン製治具。2. The method according to claim 1, wherein the carbon is graphite.
The carbon jig for firing Si-SiC according to the above.
れたものである請求項１記載のＳｉ−ＳｉＣ焼成用カー
ボン製治具。3. The carbon jig for firing Si—SiC according to claim 1, which is manufactured by CIP molding or extrusion molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4186711A JP2642561B2 (en) | 1992-07-14 | 1992-07-14 | Carbon jig for firing Si-SiC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4186711A JP2642561B2 (en) | 1992-07-14 | 1992-07-14 | Carbon jig for firing Si-SiC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0634278A JPH0634278A (en) | 1994-02-08 |
| JP2642561B2 true JP2642561B2 (en) | 1997-08-20 |
Family
ID=16193306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4186711A Expired - Lifetime JP2642561B2 (en) | 1992-07-14 | 1992-07-14 | Carbon jig for firing Si-SiC |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2642561B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2516048B1 (en) * | 2009-12-24 | 2019-10-02 | LG Innotek Co., Ltd. | Heat treatment container for vacuum heat treatment apparatus |
-
1992
- 1992-07-14 JP JP4186711A patent/JP2642561B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0634278A (en) | 1994-02-08 |
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