JPH0565474B1 - - Google Patents
Info
- Publication number
- JPH0565474B1 JPH0565474B1 JP9690889A JP9690889A JPH0565474B1 JP H0565474 B1 JPH0565474 B1 JP H0565474B1 JP 9690889 A JP9690889 A JP 9690889A JP 9690889 A JP9690889 A JP 9690889A JP H0565474 B1 JPH0565474 B1 JP H0565474B1
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- sintering
- shaped
- rod
- straightening
- 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
- 239000000919 ceramic Substances 0.000 claims description 23
- 238000005245 sintering Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 8
- 229910010271 silicon carbide Inorganic materials 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-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
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、セラミツクス焼結体、特に棒状又は
板状のものの曲がり又はそりの矯正方法に関し、
形状の良好な棒状又は板状セラミツクス焼結体を
安定に、容易に矯正するための方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for correcting bending or warping of ceramic sintered bodies, particularly rod-shaped or plate-shaped ones.
The present invention relates to a method for stably and easily straightening a rod-shaped or plate-shaped ceramic sintered body having a good shape.
従来の技術
焼結により直ちに真直性の良好なセラミツク
ス、特に棒状や板状のものを得ることが困難であ
つたため、通常焼結後、研削加工等の機械的な手
段を用いて真直性の良好な棒状、管状や板状等の
セラミツクス製品を製造していた。Conventional technology Because it is difficult to immediately obtain ceramics with good straightness through sintering, especially rod-shaped or plate-shaped ceramics, mechanical means such as grinding are usually used to obtain good straightness after sintering. The company manufactured ceramic products in the form of rods, tubes, and plates.
発明が解決しようとする課題
近年セラミツクスの優れた特性が着目され、各
種分野にセラミツクス部品が使用されている。Problems to be Solved by the Invention In recent years, the excellent properties of ceramics have attracted attention, and ceramic parts have been used in various fields.
棒、管状や板状等の形状の実用化に対しては、
真直性が良好であることが要求され、その対処と
して焼結後の研削加工によるとその加工費が高
く、量産性に欠け、又特に炭化ケイ素焼結体等の
場合は硬度が高く、ダイヤモンド砥石を用いても
容易に研削することができず、製造に長時間を要
した。 For the practical use of shapes such as rods, tubes, and plates,
Good straightness is required, and as a solution to this problem, grinding after sintering is expensive and difficult to mass-produce, and especially in the case of silicon carbide sintered bodies, the hardness is high and diamond grinders are not suitable. However, it was not easy to grind even when using a grinder, and manufacturing took a long time.
課題を解決するための手段
本発明者は、焼結体の矯正方法として次の方法
すなわち、セラミツクス焼結体の曲がり又はそり
を矯正する方法において、セラミツクス焼結体
を、互いに向き合つた側に、焼結体の目的の形状
に合わせた矯正溝が設けられた１対の焼結冶具間
に配置し、焼結冶具同志は接しないように間隙を
設け、焼結冶具の自重又は加圧によつて焼結体に
圧力をかけながら再度、焼結温度で加熱処理する
ことを特徴とするセラミツクス焼結体の矯正方法
を見出した。Means for Solving the Problems The present inventor proposed the following method for straightening a sintered body, that is, a method for straightening the bending or warping of a ceramic sintered body. , it is placed between a pair of sintering jigs that are provided with a correction groove that matches the desired shape of the sintered body, and a gap is provided so that the sintering jigs do not touch each other. Therefore, we have discovered a method for straightening a ceramic sintered body, which is characterized by heat-treating the sintered body again at the sintering temperature while applying pressure to the sintered body.
本発明について、セラミツクス焼結体として炭
化ケイ素を例として、又その形状として棒状のも
のについて詳細に説明する。 The present invention will be described in detail using silicon carbide as an example of the ceramic sintered body and a rod-shaped ceramic sintered body.
まず、本発明が使用される焼結体について述べ
る。セラミツクス焼結体原料である炭化ケイ素微
粉末に、メチルセルローズ、ポリビニルアルコー
ル等の結合剤、グリセリン等の分散剤、Ｂおよび
Ｃ等の焼結助剤を所定量加え、更に水を加えて、
混練機等により十分に混練してペーストを造る。 First, the sintered body to which the present invention is used will be described. Add a predetermined amount of a binder such as methylcellulose or polyvinyl alcohol, a dispersant such as glycerin, and a sintering aid such as B and C to fine silicon carbide powder that is a raw material for a ceramic sintered body, and then add water.
Thoroughly knead with a kneader or the like to make a paste.
次にこのペーストを真空押出機等にて、押出成
形して棒状の成形体を得る。 Next, this paste is extruded using a vacuum extruder or the like to obtain a rod-shaped molded body.
必要に応じてこの成形体を切断し、アルゴン雰
囲気中又は真空中に1900〜2100℃にて焼結する。 This molded body is cut as necessary and sintered at 1900 to 2100°C in an argon atmosphere or vacuum.
このようにして得られた棒状炭化ケイ素焼結体
に本発明が適用される。 The present invention is applied to the rod-shaped silicon carbide sintered body thus obtained.
本発明を第１図を用いて説明する。第１図は矯
正時の棒状焼結体の配置図で、１は前述の未矯正
の曲がつた棒状焼結体で、２，３は互いに向き合
つた側にセラミツクス焼結体の形状に合わせた曲
がり矯正溝４，５を設けた焼結冶具で、焼結冶具
２，３同志が接しないように間隔６を設けてあ
る。 The present invention will be explained using FIG. Figure 1 shows the layout of the rod-shaped sintered body during straightening, where 1 is the unstraightened bent rod-shaped sintered body mentioned above, and 2 and 3 are the sides facing each other that match the shape of the ceramic sintered body. This sintering jig is provided with curved straightening grooves 4 and 5, and a gap 6 is provided so that the sintering jigs 2 and 3 do not touch each other.
この焼結冶具２，３の曲がり矯正溝４，５にセ
ラミツクス焼結体１を挟み、焼結冶具の自重によ
りセラミツクス焼結体の外径方向に圧力が加わる
ように配設する。 The ceramic sintered body 1 is sandwiched between the bend correction grooves 4 and 5 of the sintering jigs 2 and 3, and the sintering jigs 2 and 3 are arranged so that pressure is applied in the outer diameter direction of the ceramic sintered body by the weight of the sintering jig.
このようにして配設された棒状炭化ケイ素焼結
体を再度1900〜2100℃の焼結温度で２〜３時間加
熱することにより、真直性の良好な棒状炭化ケイ
素焼結体を得ることができる。 By heating the rod-shaped silicon carbide sintered body arranged in this way again at a sintering temperature of 1900 to 2100°C for 2 to 3 hours, a rod-shaped silicon carbide sintered body with good straightness can be obtained. .
本発明の適用できるセラミツクスとしては炭化
ケイ素、アルミナ、窒化ケイ素、窒化アルミナ等
であり、矯正する形状にしても棒状、管状、板状
等のものに使用しうる。 Ceramics to which the present invention can be applied include silicon carbide, alumina, silicon nitride, alumina nitride, etc., and can be used in straightened shapes such as rods, tubes, and plates.
実施例 以下、本発明を実施例にて詳細に説明する。Example Hereinafter, the present invention will be explained in detail with reference to Examples.
実施例 １
径30mmφ、長さ600mm、曲がりの最大値が５mm
の棒状炭化ケイ素焼結体および黒鉛製焼結冶具を
第１図に示すように配設し、焼結炉に設置した。
その後、炉内を加熱し、アルゴンガス雰囲気中に
て1980℃、３時間再焼結を行なつた。この再焼結
体の曲がりは0.5mmと矯正された。Example 1 Diameter 30mmφ, length 600mm, maximum bending value 5mm
A rod-shaped silicon carbide sintered body and a graphite sintering jig were arranged as shown in FIG. 1 and placed in a sintering furnace.
Thereafter, the inside of the furnace was heated and re-sintering was performed at 1980° C. for 3 hours in an argon gas atmosphere. The bending of this resintered body was corrected to 0.5 mm.
比較例 １
実施例１において溝のない黒鉛焼結冶具に30mm
φ×600mmの棒状焼結体１を載せて、実施例１と
同様に再焼結処理を行なつた。その結果、その曲
がりは2.5mmであつた。Comparative example 1 In Example 1, a graphite sintering jig with no grooves had a diameter of 30 mm.
A rod-shaped sintered body 1 with a diameter of 600 mm was placed thereon, and re-sintering treatment was performed in the same manner as in Example 1. As a result, the bend was 2.5 mm.
発明の効果
棒状又は板状セラミツクス焼結体の本発明の方
法による加熱によつて得られた棒状又は板状セラ
ミツクスは真直性がきわめて高く、通常何らの機
械加工を必要としない。Effects of the Invention The rod-shaped or plate-shaped ceramics obtained by heating the rod-shaped or plate-shaped ceramic sintered bodies by the method of the present invention have extremely high straightness and usually do not require any machining.
しかも手段が簡単であるため簡便に迅速に、且
つ大量に、棒状又は板状セラミツクスの曲がりを
矯正することができる。 Moreover, since the method is simple, the bending of rod-shaped or plate-shaped ceramics can be straightened simply, quickly, and in large quantities.
第１図は、矯正時の棒状セラミツクス焼結体の
配置図である。
１……棒状焼結体、２，３……焼結冶具、４，
５……曲がり矯正溝、６……間隙。
FIG. 1 is a layout diagram of a rod-shaped ceramic sintered body during straightening. 1... Rod-shaped sintered body, 2, 3... Sintering jig, 4,
5...Bending correction groove, 6...Gap.
Claims (1)
する方法において、セラミツクス焼結体を、互い
に向き合つた側に、焼結体の目的の形状に合わせ
た矯正溝が設けられた１対の焼結冶具間に配置
し、焼結治具同志は接しないように間隙を設け、
焼結治具の自重又は加圧によつて焼結体に圧力を
かけながら再度、焼結温度で加熱処理することを
特徴とするセラミツクス焼結体の矯正方法。1. In a method for straightening bending or warping of a ceramic sintered body, a pair of sintering jigs are provided on opposite sides of the ceramic sintered body with straightening grooves that match the desired shape of the sintered body. A gap is provided so that the sintering jigs do not touch each other.
A method for straightening a ceramic sintered body, which comprises heat-treating the sintered body again at a sintering temperature while applying pressure to the sintered body using the weight of a sintering jig or pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9690889A JPH02275785A (en) | 1989-04-17 | 1989-04-17 | Rectifying method of ceramic sintered material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9690889A JPH02275785A (en) | 1989-04-17 | 1989-04-17 | Rectifying method of ceramic sintered material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02275785A JPH02275785A (en) | 1990-11-09 |
| JPH0565474B1 true JPH0565474B1 (en) | 1993-09-17 |
Family
ID=14177462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9690889A Pending JPH02275785A (en) | 1989-04-17 | 1989-04-17 | Rectifying method of ceramic sintered material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02275785A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4955864B2 (en) * | 2001-05-31 | 2012-06-20 | 日本碍子株式会社 | Method for producing silicon nitride strip |
| CN111747755A (en) * | 2020-07-13 | 2020-10-09 | 无锡英罗唯森科技有限公司 | Preparation method of thin-walled tube |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125241A (en) * | 1974-08-26 | 1976-03-01 | Yamaha Motor Co Ltd | Jidonirinshano dendosochi |
| JPS6041026B2 (en) * | 1978-05-18 | 1985-09-13 | 日本特殊陶業株式会社 | Ceramic substrate firing method |
| JPS62100479A (en) * | 1985-10-29 | 1987-05-09 | 電気化学工業株式会社 | Manufacture of aluminum nitride sintered sheet |
-
1989
- 1989-04-17 JP JP9690889A patent/JPH02275785A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02275785A (en) | 1990-11-09 |
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