JPH0427189B2 - - Google Patents
Info
- Publication number
- JPH0427189B2 JPH0427189B2 JP61036147A JP3614786A JPH0427189B2 JP H0427189 B2 JPH0427189 B2 JP H0427189B2 JP 61036147 A JP61036147 A JP 61036147A JP 3614786 A JP3614786 A JP 3614786A JP H0427189 B2 JPH0427189 B2 JP H0427189B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- powder
- fired
- ceramic
- coating 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 - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 24
- 238000010304 firing Methods 0.000 claims description 20
- 239000000919 ceramic Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 11
- 229910000859 α-Fe Inorganic materials 0.000 claims description 10
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229910018605 Ni—Zn Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 8
- 239000011521 glass Substances 0.000 description 7
- 230000004927 fusion Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- -1 cermets Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は各種セラミツクス、粉体ガラス、金属
等を焼成する際に、被焼成物相互間あるいは被焼
成物と基台との間の滑性を向上させて融着や表面
傷の発生を防止するために用いられる焼成時の滑
性向上用シートに関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is aimed at improving the slipperiness between the objects to be fired or between the objects to be fired and the base when firing various ceramics, powder glass, metals, etc. The present invention relates to a sheet for improving lubricity during firing, which is used to improve lubricity and prevent the occurrence of fusion and surface scratches.
（従来の技術）
従来からアルミナ基板のようなセラミツクス板
を焼成する際には、相互間の融着を防止するため
にアルミナ粉末を人手により散布しつつセラミツ
クス板を積層する方法が採られているが、散布の
不均一に起因する基板のうねりやピンホール等が
発生し易いうえ、焼成時に被焼成物が収縮するた
めに被焼成物の下面が基台表面により擦れ、放射
状の擦り傷が生じ易い欠点があつた。またサーメ
ツト、超硬合金のような粉末プレスされた金属体
を焼結する場合にも上記と同様にセツターと称さ
れる基台上に敷粉等を散布しているが、被焼成物
の下面と基台との間に大きい摩擦が生じて被焼成
物が反り易く、研削加工によつて反り部を除去し
なければならず歩留りが低下するうえ製造コスト
上昇の原因となつていた。そこでこれらの欠点を
解決するために、紙やプラスチツクシートの内部
にAl2O3粉体やZrO2粉体を分散させた敷粉含有シ
ートが発明され、特公昭60−8991号として公告さ
れているが、焼成時にシート全体が大幅に収縮し
て周縁部においてはセラミツクス基板どうしが融
着することがあるうえ、滑性向上効果が不充分で
特に金属質のような密度の大きい被焼成物の焼成
には役に立たない欠点があつた。(Prior art) Conventionally, when firing ceramic plates such as alumina substrates, a method has been adopted in which the ceramic plates are stacked while manually scattering alumina powder to prevent mutual fusion. However, undulations and pinholes are likely to occur in the substrate due to uneven distribution, and as the object shrinks during firing, the bottom surface of the object is likely to rub against the base surface, resulting in radial scratches. There were flaws. Also, when sintering a powder-pressed metal body such as cermet or cemented carbide, powder, etc. is sprinkled on a base called a setter in the same way as above, but the bottom surface of the object to be fired is A large amount of friction occurs between the sintered material and the base, and the object to be fired tends to warp, and the warped portion must be removed by grinding, which lowers the yield and causes an increase in manufacturing costs. In order to solve these drawbacks, a bed powder-containing sheet was invented in which Al 2 O 3 powder or ZrO 2 powder was dispersed inside a paper or plastic sheet, and it was published as Japanese Patent Publication No. 8991/1989. However, during firing, the entire sheet may shrink significantly and the ceramic substrates may fuse together at the periphery, and the lubricity improvement effect is insufficient, especially for materials with high density such as metals. Firing had some disadvantages that made it useless.
（発明が解決しようとする問題点）
本発明はこのような従来の問題点を解決して、
焼成時に過大な収縮を生ずることがなく、セラミ
ツクス質のみならずガラス質や金属質からなる被
焼成物の焼結時の反りや融着や傷つきをも有効に
防止することができる焼成時の滑性向上用シート
を目的として完成されたものである。(Problems to be solved by the invention) The present invention solves these conventional problems,
Slip during firing, which does not cause excessive shrinkage during firing, and can effectively prevent warping, fusion, and scratches during sintering of materials made of not only ceramics but also glass and metals. It was developed for the purpose of being used as a sex-enhancing sheet.
（問題点を解決するための手段）
本発明は可燃性のシートの表面にBN，AIN，
Si3N4からなる窒化物、SiCからなる炭化物、お
よびMn−Zn系フエライト、Ni−Zn系フエライ
トからなるフエライトの群から選択された１種又
は２種以上のセラミツクス粉体とカーボン粉体と
を含むコーテイング層を形成したことを特徴とす
るものである。(Means for solving the problem) The present invention provides BN, AIN, and
One or more ceramic powders selected from the group of nitrides made of Si 3 N 4 , carbides made of SiC, and ferrites consisting of Mn-Zn ferrites and Ni-Zn ferrites, and carbon powder. It is characterized by forming a coating layer containing.
本発明において用いられる可燃性のシート１と
しては、焼成時に完全に焼失するパルプ紙が最も
好ましいものであるが、ポリビニルアルコールの
ような可燃性のプラスチツクからなるシートを用
いることもできる。このシート１の片側又は両側
の表面にはセラミツクス粉体２と、カーボン粉体
３とを有機バインダと混合したうえで塗布したコ
ーテイング層４が形成されている。コーテイング
層４に含有させるセラミツクス粉体２としては
BN，AIN，Si3N4からなる窒化物系のもの、SiC
からなる炭化物系のもののほかMn−Zn系フエラ
イト、Ni−Zn系フエライトからなるフエライト
系のものであつてもよく、これらの群から選択れ
た１種又は２種以上の粉体が用いられる。一般に
セラミツクスの耐熱性については炭化物＞窒化物
＞酸化物の傾向があり、これらのセラミツクス粉
体はAl2O3のような酸化物よりも更に優れた耐熱
性を有する。またBNは特にガラスの離型材とし
ても使用されているようにガラスに対する滑性に
優れており、粉体ガラスの焼成用として好適であ
る。 The combustible sheet 1 used in the present invention is most preferably pulp paper, which is completely burnt out during firing, but a sheet made of combustible plastic such as polyvinyl alcohol can also be used. A coating layer 4 is formed on one or both surfaces of the sheet 1 by coating a mixture of ceramic powder 2 and carbon powder 3 with an organic binder. As the ceramic powder 2 to be contained in the coating layer 4,
Nitride type consisting of BN, AIN, Si 3 N 4 , SiC
In addition to carbide-based powders consisting of the following, ferrite-based powders may include Mn--Zn-based ferrites and Ni--Zn ferrites, and one or more powders selected from these groups are used. In general, the heat resistance of ceramics tends to be carbide > nitride > oxide, and these ceramic powders have even better heat resistance than oxides such as Al 2 O 3 . Furthermore, BN has excellent lubricity to glass, as it is particularly used as a mold release material for glass, and is suitable for firing powdered glass.
コーテイング層４は25〜95％（重量％、以下同
じ）のセラミツクス粉体２と３〜70％のカーボン
粉体３とを３〜30％の有機バインダと混合したも
のとすることが好ましい。セラミツクス粉体２は
被焼成物が相互に融着することを防止するととも
に滑性を付与する役割を果たすものであり、その
含有率が25％以下ではこの効果が不十分であり、
95％以上とするとコーテイング層４の平滑度が失
われるのみならずカーボン粉体３の含有率が相対
的に低下して次に述べるカーボン粉体３により効
果が不十分となる。カーボン粉体３は焼成時にお
ける焼成用シート全体の収縮を抑制するとともに
被焼成物の表面の滑性を向上させる役割を果たす
ものであり、３％未満では収縮抑制効果が不足
し、70％を越えると次第にシート１の表面へのコ
ーテイングを行うことが困難化する。 The coating layer 4 is preferably made of a mixture of 25-95% (by weight, the same applies hereafter) of ceramic powder 2 and 3-70% of carbon powder 3 with 3-30% of an organic binder. The ceramic powder 2 plays the role of preventing the objects to be fired from fusing together and imparting lubricity, and if its content is less than 25%, this effect is insufficient.
If it exceeds 95%, not only will the smoothness of the coating layer 4 be lost, but also the content of the carbon powder 3 will be relatively reduced, resulting in insufficient effects due to the carbon powder 3 described below. The carbon powder 3 plays the role of suppressing the shrinkage of the entire baking sheet during baking and improving the surface slipperiness of the object to be baked. If it is less than 3%, the shrinkage suppressing effect is insufficient; If it exceeds this limit, it becomes increasingly difficult to coat the surface of the sheet 1.
なお、有機バインダとしては例えばアクリル樹
脂系のものを使用することができるが、焼成時に
被焼成物に悪影響を及ぼすことなく焼失するもの
であれば、任意の種類のものを用いることができ
る。またセラミツクス粉体中には上記のもののほ
か、Al2O3やZrO2のような酸化物系のものを付加
的に添加してもよい。 As the organic binder, for example, an acrylic resin-based binder can be used, but any type of binder can be used as long as it is burned out without adversely affecting the object to be fired during firing. Further, in addition to the above-mentioned materials, oxide-based materials such as Al 2 O 3 and ZrO 2 may be additionally added to the ceramic powder.
（作用）
このように構成されたものは、アルミナ基板に
代表されるセラミツクス材、粉末ガラスのプリフ
オーム材、サーメツト、超硬合金のような粉末プ
レス材等の被焼成物を焼成する際にそれらの相互
間及びそれらと基台（セツター）との間に挟んで
用いられるものであり、焼成時の高温によつて可
燃性のシート１は焼失するが高融点のセラミツク
ス粉体２がカーボン粉体３とともに残つて被焼成
物相互間及び被焼成物と基台との間に融着を防止
し、同時に滑性を高めて焼結時の収縮による被焼
成物表面の傷付きを防止するものである。しかも
本発明のシートは可燃性のシート１の表面にコー
テイング層４を形成したものであるからその製造
が容易でコストが安いものであるうえに、コーテ
イング層４には好ましくは３〜70％のカーボン粉
体３を含有させてあるので焼成時の収縮が小さ
く、従来のように周縁部において被焼成物どうし
が融着することがない。また、本発明のシートは
表面が平滑なものであるから、これを用いてセラ
ミツクス基板等を焼成した場合にもその表面は平
滑性に優れたものとなり、うねりやピンホール等
の発生を有効に防止することができるものであ
る。次に本発明の好ましい実施例を示す。(Function) The device configured in this way can be used when firing materials such as ceramic materials such as alumina substrates, powdered glass preform materials, cermets, and powder pressed materials such as cemented carbide. The combustible sheet 1 is burned out due to the high temperature during firing, but the ceramic powder 2 with a high melting point is used as a carbon powder 3. It remains together with the sintering material to prevent fusion between the objects to be fired and between the objects to be fired and the base, and at the same time increases the lubricity and prevents scratches on the surface of the objects to be fired due to shrinkage during sintering. . Moreover, since the sheet of the present invention has the coating layer 4 formed on the surface of the combustible sheet 1, it is easy to manufacture and low in cost. Since the carbon powder 3 is contained, the shrinkage during firing is small, and the objects to be fired do not fuse together at the peripheral edges, unlike in the conventional case. Furthermore, since the sheet of the present invention has a smooth surface, even when ceramic substrates, etc. are fired using the sheet, the surface will be excellent in smoothness, and the generation of waviness and pinholes will be effectively prevented. It is something that can be prevented. Next, preferred embodiments of the present invention will be shown.
（実施例）
実施例 １
平均粒度10μmのBN粉体60（重量）部と平均粒
度3μmのカーボン粉体３５部とを有機バインダ５
部とともに混合し、可燃性のプラスチツクシート
の片面に塗布してコーテイング層とした。このシ
ートをガラス粉体をバインダとともにプレス成形
したプリフオーム体を焼成する際にセツターの上
面に敷いて使用したところ、焼成品の裏面には従
来は避けることができなかつた熱収縮による放射
状の擦り傷が全く発生せず、勿論融着も生じなか
つた。(Example) Example 1 60 parts (by weight) of BN powder with an average particle size of 10 μm and 35 parts of carbon powder with an average particle size of 3 μm were combined with an organic binder 5.
The mixture was mixed with the following ingredients and applied to one side of a flammable plastic sheet to form a coating layer. When this sheet was used by laying it on the top of a setter when firing a preform body made by press-molding glass powder together with a binder, radial scratches due to heat shrinkage, which could not be avoided in the past, were found on the back side of the fired product. This did not occur at all, and of course, no fusion occurred.
実施例 ２
平均粒度5μmのNi−Zn系フエライト粉体８０
部を１０部のカーボン粉体とともに１０部の有機
バインダに混合し、厚さ0.3mmの紙製シートの両
面に塗布してコーテイング層を形成した。このシ
ートを粉末プレスされた超硬合金の焼成時にセツ
ターの上面に敷いて使用したところ、熱収縮によ
る擦り傷が全く発生せず、また熱収縮による反り
も従来の1/3以下に減少した。Example 2 Ni-Zn ferrite powder 80 with an average particle size of 5 μm
1 part was mixed with 10 parts of organic binder together with 10 parts of carbon powder, and the mixture was applied to both sides of a paper sheet having a thickness of 0.3 mm to form a coating layer. When this sheet was used by laying it on the top of a setter during firing of powder-pressed cemented carbide, there were no scratches caused by heat shrinkage, and warping caused by heat shrinkage was reduced to less than 1/3 of that of conventional sheets.
（発明の効果）
本発明は以上の説明からも明らかなように、可
燃性のシートの表面に、前記のような特殊なセラ
ミツクス粉体とカーボン粉体とを含むコーテイン
グ層を形成したことを特徴とするものであつて、
焼成時に過大な収縮を生ずることがなく、また被
焼成物表面の滑性を向上させ焼成収縮による被焼
成物の擦り傷を完全に防止することができるうえ
に被焼成物の融着を確実に防止することができる
ものである。しかも本発明は製造が容易でコスト
が安く、しかも焼成物のうねりやピンホールを防
止することができるものであるから、従来の問題
点を解消した焼成時の滑性向上用シートとして、
業界に寄与するところは極めて大である。(Effects of the Invention) As is clear from the above description, the present invention is characterized in that a coating layer containing the above-mentioned special ceramic powder and carbon powder is formed on the surface of a combustible sheet. and
It does not cause excessive shrinkage during firing, improves the lubricity of the surface of the fired object, completely prevents scratches on the fired object due to firing shrinkage, and reliably prevents fusion of the fired objects. It is something that can be done. Moreover, the present invention is easy to manufacture, is inexpensive, and can prevent waviness and pinholes in the fired product, so it can be used as a sheet for improving lubricity during firing that solves the conventional problems.
The contribution to the industry is extremely large.
図面は本発明のシートを示す断面図である。
１……シート、２……セラミツクス粉体、３…
…カーボン粉体、４……コーテイング層。
The drawing is a sectional view showing the sheet of the present invention. 1...Sheet, 2...Ceramics powder, 3...
...Carbon powder, 4...Coating layer.
Claims (1)
N4からなる窒化物、SiCからなる炭化物、および
Mn−Zn系フエライト、Ni−Zn系フエライトか
らなるフエライトの群から選択された１種又は２
種以上のセラミツクス粉体２とカーボン粉体３と
を含むコーテイング層４を形成したことを特徴と
する焼成時の滑性向上用シート。1 BN, AIN, Si 3 on the surface of combustible sheet 1
Nitride consisting of N4 , carbide consisting of SiC, and
One or two selected from the group of ferrites consisting of Mn-Zn ferrite and Ni-Zn ferrite.
A sheet for improving lubricity during firing, characterized in that a coating layer 4 containing at least one ceramic powder 2 and a carbon powder 3 is formed.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61036147A JPS62193825A (en) | 1986-02-20 | 1986-02-20 | Sheet for improving sliding property on baking |
| EP19870301370 EP0236006B1 (en) | 1986-02-20 | 1987-02-18 | Sheet for use in firing base plates |
| DE8787301370T DE3775793D1 (en) | 1986-02-20 | 1987-02-18 | PLATE FOR USE IN BURNING BASE PANELS. |
| US07/016,288 US4756959A (en) | 1986-02-20 | 1987-02-19 | Sheet for use in firing base plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61036147A JPS62193825A (en) | 1986-02-20 | 1986-02-20 | Sheet for improving sliding property on baking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62193825A JPS62193825A (en) | 1987-08-26 |
| JPH0427189B2 true JPH0427189B2 (en) | 1992-05-11 |
Family
ID=12461678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61036147A Granted JPS62193825A (en) | 1986-02-20 | 1986-02-20 | Sheet for improving sliding property on baking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62193825A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02305416A (en) * | 1989-05-19 | 1990-12-19 | Hitachi Ferrite Ltd | Ferrite sheet |
-
1986
- 1986-02-20 JP JP61036147A patent/JPS62193825A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62193825A (en) | 1987-08-26 |
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