JPH0240021B2 - - Google Patents
Info
- Publication number
- JPH0240021B2 JPH0240021B2 JP61222932A JP22293286A JPH0240021B2 JP H0240021 B2 JPH0240021 B2 JP H0240021B2 JP 61222932 A JP61222932 A JP 61222932A JP 22293286 A JP22293286 A JP 22293286A JP H0240021 B2 JPH0240021 B2 JP H0240021B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- powder
- firing
- ceramic
- melting point
- 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
- 239000000919 ceramic Substances 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 28
- 238000010304 firing Methods 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 17
- 230000008018 melting Effects 0.000 claims description 17
- 239000011247 coating layer Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007610 electrostatic coating method Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 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
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
（産業上の利用分野）
本発明はアルミナ基板のようなセラミツク製品
を焼成する際に各セラミツク製品間の融着を防止
するために用いられるセラミツク製品焼成用シー
トの改良に関するものである。
（従来の技術）
セラミツク製品を焼成する際の相互の融着防止
のためには、特公昭60−8991号公報に示されるよ
うに紙やプラスチツクシートの内部にアルミナや
ジルコニアの粉体を分散させた敷粉含有シートが
従来から用いられているが、焼成時にシート全体
が大幅に収縮して周縁部においてセラミツク製品
どうしが融着する等の問題があつた。
そこで本発明者等はシートの表面にアルミナや
ジルコニア等のセラミツク粉体とカーボン粉体と
からなるコーテイング層を形成することにより焼
成時の収縮を防止したセラミツク製品焼成用シー
トを発明し、特願昭60−182727号として先に提案
したところである。ところがこの先願のものは25
〜90％（重量％、以下同じ）という多量のセラミ
ツク粉体をコーテイング層中に含有するものであ
るため、シートの表面にセラミツク粉体が複数段
積重さなつた状態となり、切断時等にはコーテイ
ング層が割れることがあること、カツターの摩耗
が激しく切断が困難であること、セラミツク製品
焼成後に多量のセラミツク粉体が基板上に残りそ
の除去に手数を要すること等の問題があることが
分かつた。
（発明が解決しようとする問題点）
本発明は上記のような従来の問題点を解決して
焼成時にほとんど収縮することがなく、またコー
テイング層に割れが生じにくいうえ切断及び焼成
後のセラミツク粉体の除去が容易なセラミツク製
品焼成用シートを目的として完成されたものであ
る。
（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、0.5〜25％
（重量％、以下同じ）の高融点粉体と、５〜90％
のカーボン粉体と、0.1〜８％の分散剤と、残部
を占めるバインダとからなる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。
次に本発明を図面を参照しつつ詳細に説明する
と、１は紙等の可燃性のシートであり、焼成時に
完全に消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。２はシート１の表面に例えば40μｍ程度の厚
さに形成されたコーテイング層であり、このコー
テイング層２は上記のように高融点粉体３と、カ
ーボン粉体４と、分散剤とバインダとを適宜に組
み合わせ含浸コート法、静電塗装法または流動浸
漬法によつて塗布し乾燥させたものである。高融
点粉体３としては平均粒径が30〜40μｍ程度のア
ルミナ、ジルコニア、炭化珪素、窒化珪素、窒化
アルミニウム、窒化硼素のような高融点のセラミ
ツク粉体を用いるのが普通であるが、マンガン−
亜鉛、ニツケル−亜鉛等のフエライト粉体を用い
ることもできる。カーボン粉体４としては、例え
ば粒径が0.6μｍ程度の微粉を用いるものとする。
また分散剤としてはふつ素系、ノニオン系、アニ
オン系等の界面活性剤が用いられ、バインダとし
てはアクリル樹脂系バインダ、エポキシ樹脂系バ
インダのような合成樹脂系のものが用いられる。
このような分散剤を用いることにより高融点粉
体３の分散を良化させ、シート１の表面に高融点
粉体３を単層あるいはこれに近い状態で付着させ
た点に本発明の特徴があり、このために各成分の
含有率が前記のとおり決定されているのである
が、各成分の数値限定の理由は次のとおりであ
る。
まず高融点粉体３はセラミツク製品が相互に融
着することを防止する役割を果すものであり、そ
の含有率が0.5％未満ではこの効果が不十分であ
り、25％を越えるとコーテイング層２の平滑度が
失われるのみならずカーボン粉体４の含有率が相
対的に低下して次に述べるカーボン粉体４による
効果が不十分となる。カーボン粉体４は焼成時に
シート１を蒸し焼き状態で炭化させることにより
その収縮を防止するためのもので、５％未満では
その効果が不十分であり、90％を越えると、高融
点粉体３の分散が均一に行われにくくなる。分散
剤はコーテイング層２中に高融点粉体３及びカー
ボン粉体４を均一に分散させるためのもので、
0.1％未満では分散不十分となつて部分的にクラ
ツクが発生したりする原因となり、８％を越える
と分散剤過多のため却つて分散性が悪化するうえ
にセラミツク製品にも悪影響を及ぼす。
（作用）
このように構成されたものは、グリーンシート
やセラミツク粉末成形品等のセラミツク製品を焼
成する際にセラミツク製品相互間やセラミツク製
品と台板との間等に挟んで用いられるものであ
り、シート１の表面に形成されたコーテイング層
２中のカーボン粉体４の作用によりシート１は蒸
し焼き状態でほとんど収縮することなく炭化され
るとともに、その内部の高融点粉体３がグリーン
シート等の相互間に残つて相互の融着を防止する
ものである。特に本発明においては可燃性のシー
ト１の表面に形成されたコーテイング層(2)に分散
剤を含有させるとともに高融点粉体３の含有率を
0.5〜25％としたので、図示のように高融点粉体
３は単層に近い状態でシート１の表面に均等に分
散することとなり、クラツクの発生がないこと、
切断が容易でカツターの摩耗が少ないこと、セラ
ミツク製品焼成後の基板上に残留する高融点粉体
の量が少なくその除去作業が容易であること等の
利点がある。このように本発明のシートはその全
体が極めて均質なものとなり、本発明のシートを
用いてグリーンシートを焼成した場合には焼成さ
れたセラミツク基板もうねりやピンホールのない
極めて平滑性に優れたものとなる。また本発明の
シートは、セラミツク粉末成形品の焼成の際にも
同様に用いられ、優れた融着防止効果を発揮する
ことができる。
（実施例）
厚さ40μｍのパルプ紙からなるシート１の両表
面に、次表の組成のコーテイング層２を片側40μ
ｍの厚さとなるように含浸コート法により塗布、
乾燥して形成した。このようにして得られた各実
施例のセラミツク製品焼成用シートを厚さ1.2mm
のアルミナグリーンシートの間に挟みながら８段
積層して焼成を行い、得られた焼成品のうねりを
測定したところ同表に記したとおりの良好な結果
が得られた。
なおデータはいずれも測定長80mmについてのも
のである。
(Field of Industrial Application) The present invention relates to an improvement in a sheet for firing ceramic products, which is used to prevent fusion between ceramic products when firing ceramic products such as alumina substrates. (Prior art) In order to prevent ceramic products from adhering to each other when fired, alumina or zirconia powder is dispersed inside paper or plastic sheets, as shown in Japanese Patent Publication No. 8991/1983. Sheets containing ceramic powder have been used in the past, but there have been problems such as the sheet as a whole shrinks significantly during firing, causing the ceramic products to fuse together at the periphery. Therefore, the present inventors invented a sheet for firing ceramic products that prevents shrinkage during firing by forming a coating layer on the surface of the sheet consisting of ceramic powder such as alumina or zirconia and carbon powder. This was previously proposed as No. 182727, 1983. However, this earlier application is 25
Since the coating layer contains a large amount of ceramic powder, up to 90% (by weight, the same applies hereafter), the ceramic powder is piled up in multiple layers on the surface of the sheet, causing damage during cutting, etc. There are problems such as the coating layer may crack, the cutter is severely worn and difficult to cut, and a large amount of ceramic powder remains on the substrate after firing the ceramic product, which requires time and effort to remove. I understand. (Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, so that there is almost no shrinkage during firing, the coating layer is less likely to crack, and the ceramic powder after cutting and firing is This sheet was developed for the purpose of producing a sheet for firing ceramic products that can be easily removed. (Means for Solving the Problems) The present invention provides 0.5 to 25%
(wt%, same below) high melting point powder and 5 to 90%
The present invention is characterized by forming a coating layer consisting of carbon powder, 0.1 to 8% of a dispersant, and the remainder of the binder. Next, the present invention will be explained in detail with reference to the drawings. 1 is a flammable sheet such as paper, and the most preferable is pulp paper, which completely disappears when fired, but combustible sheets such as polyvinyl alcohol It is also possible to use sheets of plastic. 2 is a coating layer formed on the surface of the sheet 1 to a thickness of, for example, about 40 μm, and this coating layer 2 contains the high melting point powder 3, carbon powder 4, dispersant, and binder as described above. It is applied by an appropriate combination impregnation coating method, electrostatic coating method or fluidized dipping method and dried. As the high melting point powder 3, high melting point ceramic powder such as alumina, zirconia, silicon carbide, silicon nitride, aluminum nitride, and boron nitride with an average particle size of about 30 to 40 μm is usually used, but manganese −
Ferrite powders such as zinc and nickel-zinc may also be used. As the carbon powder 4, for example, fine powder with a particle size of about 0.6 μm is used.
Further, as the dispersant, a fluorine-based, nonionic-based, or anionic-based surfactant is used, and as the binder, a synthetic resin-based one such as an acrylic resin binder or an epoxy resin-based binder is used. A feature of the present invention is that by using such a dispersant, the dispersion of the high melting point powder 3 is improved, and the high melting point powder 3 is adhered to the surface of the sheet 1 in a single layer or a state close to this. Therefore, the content of each component is determined as described above, and the reason for limiting the numerical value of each component is as follows. First, the high melting point powder 3 plays a role in preventing ceramic products from fusing together, and if its content is less than 0.5%, this effect is insufficient, and if it exceeds 25%, the coating layer 2 Not only is the smoothness of the carbon powder 4 lost, but also the content of the carbon powder 4 is relatively reduced, making the effect of the carbon powder 4, which will be described below, insufficient. The carbon powder 4 is used to prevent shrinkage of the sheet 1 by carbonizing it in a steamed state during firing, and if it is less than 5%, the effect is insufficient, and if it exceeds 90%, the high melting point powder 3 becomes difficult to disperse uniformly. The dispersant is for uniformly dispersing the high melting point powder 3 and carbon powder 4 in the coating layer 2,
If it is less than 0.1%, dispersion will be insufficient, causing cracks to occur in some areas, and if it exceeds 8%, the dispersion will not only worsen due to too much dispersant, but it will also have a negative effect on ceramic products. (Function) The device configured as described above is used by being sandwiched between ceramic products or between a ceramic product and a base plate when firing ceramic products such as green sheets and ceramic powder molded products. Due to the action of the carbon powder 4 in the coating layer 2 formed on the surface of the sheet 1, the sheet 1 is carbonized in a steamed state with almost no shrinkage, and the high melting point powder 3 inside the sheet 1 is carbonized into a green sheet or the like. They remain between each other to prevent mutual fusion. In particular, in the present invention, the coating layer (2) formed on the surface of the combustible sheet 1 contains a dispersant and the content of the high melting point powder 3 is increased.
Since the content is 0.5 to 25%, the high melting point powder 3 is evenly dispersed on the surface of the sheet 1 in a state close to a single layer as shown in the figure, and no cracks occur.
It has advantages such as ease of cutting, less wear on the cutter, and ease of removal since the amount of high melting point powder remaining on the substrate after firing the ceramic product is small. In this way, the sheet of the present invention is extremely homogeneous throughout, and when a green sheet is fired using the sheet of the present invention, the fired ceramic substrate also has excellent smoothness with no waviness or pinholes. Become something. The sheet of the present invention can also be used in the same way when firing ceramic powder molded products, and can exhibit excellent adhesion prevention effects. (Example) A coating layer 2 having the composition shown in the table below is applied on both surfaces of a sheet 1 made of pulp paper with a thickness of 40 μm.
Apply by impregnation coating method to a thickness of m.
Dry and form. The sheets for firing ceramic products of each example obtained in this way were heated to a thickness of 1.2 mm.
When the fired product was laminated in 8 layers and sandwiched between alumina green sheets and the waviness of the obtained fired product was measured, good results were obtained as shown in the table. All data are for a measurement length of 80 mm.
【表】
（発明の効果）
本発明は以上の説明からも明らかなように、焼
成時に不均一な収縮を生ずることがなく、平滑性
にすぐれたセラミツク製品を得ることができるう
え、コーテイング層に含まれる高融点粉体が単層
あるいはこれに近い状態にあるのでコーテイング
層に割れを生じにくく、また切断も容易でカツタ
ーの摩耗も少なくすることができる。しかも焼成
後に基台上に残留する高融点粉体の最も従来品よ
りもはるかに少なくできるので、その除去作業も
容易である。よつて本発明は従来のこの種のセラ
ミツク製品焼成用シートの問題点を解消したもの
として、業界に寄与するところは極めて大であ
る。[Table] (Effects of the Invention) As is clear from the above description, the present invention does not cause uneven shrinkage during firing and can provide ceramic products with excellent smoothness. Since the high melting point powder contained is in a single layer or a state close to this, the coating layer is less likely to crack, and it is also easy to cut, reducing wear on the cutter. Furthermore, since the amount of high melting point powder remaining on the base after firing is much less than that of most conventional products, its removal work is also easy. Therefore, the present invention makes an extremely large contribution to the industry by solving the problems of conventional sheets for firing ceramic products of this type.
図面は本発明のセラミツク製品焼成用シートを
示す断面図である。
１：シート、２：コーテイング層、３：高融点
粉体、４：カーボン粉体。
The drawing is a sectional view showing a sheet for firing ceramic products of the present invention. 1: sheet, 2: coating layer, 3: high melting point powder, 4: carbon powder.
Claims (1)
量％、以下同じ）の高融点粉体３と、５〜90％の
カーボン粉体４と、0.1〜８％の分散剤と、残部
を占めるバインダとからなるコーテイング層２を
形成したことを特徴とするセラミツク製品焼成用
シート。 ２ 分散剤が界面活性剤であり、バインダが合成
樹脂系のものである特許請求の範囲第１項記載の
セラミツク製品焼成用シート。[Claims] 1. On the surface of a combustible sheet 1, 0.5 to 25% (by weight, the same applies below) of high melting point powder 3, 5 to 90% of carbon powder 4, and 0.1 to 8% of carbon powder 4. A sheet for firing a ceramic product, characterized in that a coating layer 2 is formed of a dispersant and a binder occupying the remainder. 2. A sheet for firing ceramic products according to claim 1, wherein the dispersant is a surfactant and the binder is a synthetic resin type.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61222932A JPS6379764A (en) | 1986-09-20 | 1986-09-20 | Sheet for burning ceramic products |
| 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 |
|---|---|---|---|
| JP61222932A JPS6379764A (en) | 1986-09-20 | 1986-09-20 | Sheet for burning ceramic products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6379764A JPS6379764A (en) | 1988-04-09 |
| JPH0240021B2 true JPH0240021B2 (en) | 1990-09-10 |
Family
ID=16790127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61222932A Granted JPS6379764A (en) | 1986-02-20 | 1986-09-20 | Sheet for burning ceramic products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6379764A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728819U (en) * | 1993-11-05 | 1995-05-30 | 株式会社ソフト九九コーポレーション | Product dividers for boxes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03242381A (en) * | 1990-02-20 | 1991-10-29 | Ishizuka Glass Co Ltd | Sheet for burning |
-
1986
- 1986-09-20 JP JP61222932A patent/JPS6379764A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728819U (en) * | 1993-11-05 | 1995-05-30 | 株式会社ソフト九九コーポレーション | Product dividers for boxes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6379764A (en) | 1988-04-09 |
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