JPH0486543A - Measuring method for density of green sheet - Google Patents
Measuring method for density of green sheetInfo
- Publication number
- JPH0486543A JPH0486543A JP19900190A JP19900190A JPH0486543A JP H0486543 A JPH0486543 A JP H0486543A JP 19900190 A JP19900190 A JP 19900190A JP 19900190 A JP19900190 A JP 19900190A JP H0486543 A JPH0486543 A JP H0486543A
- Authority
- JP
- Japan
- Prior art keywords
- density
- slurry
- green sheet
- ceramic
- volume ratio
- 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
Landscapes
- Ceramic Capacitors (AREA)
- Compositions Of Oxide Ceramics (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】
〔概 要〕
グリーンシートの密度測定方法に係り、特にグリーンシ
ート作成の生産ラインにおいてそのグリーンシートの密
度を推定する方法に関し、グリーンシート成形工程をス
トップせずに行うグリーンシートの密度測定（推定）方
法を提供することを目的とし、
グリーンシートの密度の測定に際し、特定のセラミック
原料粉末と特定の溶剤とを含んでなるスラリーを、上部
を除いて同一断面積を有するスラリー容器内に収納し、
該スラリー容器を遠心分離器にかけ前記スラリー容器内
でセラミ・７り分層と、溶剤分層とに分離させ、それぞ
れの層高さから溶剤分／セラミック分の体積比を一方で
求めておき、他方、前記スラリーを用いて得られたグリ
ーンシートの一部の体積とその重量から密度を求めるこ
とによって前記体積比と密度の関係を複数対求めて検量
線を作成し、次に求める前記と同材料からなるスラリー
の前記体積比を前記と同様にして求め前記検量線からグ
リーンシートの密度を推定することを構成とする。[Detailed Description of the Invention] [Summary] This relates to a method for measuring the density of a green sheet, particularly a method for estimating the density of a green sheet in a production line for producing a green sheet, and a method for measuring the density of a green sheet without stopping the green sheet forming process. The purpose is to provide a method for measuring (estimating) the density of a green sheet, and when measuring the density of a green sheet, a slurry containing a specific ceramic raw material powder and a specific solvent is mixed with a slurry having the same cross-sectional area except for the upper part. Store in a slurry container,
The slurry container is centrifuged to separate a ceramic layer and a solvent layer in the slurry container, and the volume ratio of the solvent/ceramic portion is determined from the height of each layer. On the other hand, by determining the density from the volume of a portion of the green sheet obtained using the slurry and its weight, a calibration curve is created by determining multiple pairs of relationships between the volume ratio and the density, and then the same relationship as described above is determined. The volume ratio of the slurry made of the material is determined in the same manner as described above, and the density of the green sheet is estimated from the calibration curve.
本発明はグリーンシートの密度測定方法に係り、特にグ
リーンシート作成の生産ラインにおいてそのグリーンシ
ートの密度を推定する方法に関するものである。The present invention relates to a method for measuring the density of a green sheet, and more particularly to a method for estimating the density of a green sheet in a production line for producing the green sheet.
ガラスセラミック等から多層セラミック基板を製造する
前段階で例えばアルミナとガラスをボールミルで整粒し
、混練した後、脱泡粘調工程を経てドクターブレード法
によりグリーンシートに成形する。Before manufacturing a multilayer ceramic substrate from glass ceramic or the like, for example, alumina and glass are sized in a ball mill, kneaded, and then formed into a green sheet by a doctor blade method after a defoaming and viscosity process.
グリーンシートの密度は板厚の均一化を図るための乾燥
工程に大きな影響を与える。The density of the green sheet has a large effect on the drying process to achieve uniform board thickness.
〔従来の技術］
従来グリーンシートの密度測定はドクターブレードによ
りグリーンシートに成形した後に一定面積（一定体積）
分をその都度抜き取り、その重量を測定してグリーンシ
ートの密度を算出していた。[Conventional technology] Conventionally, the density of green sheets was measured using a fixed area (fixed volume) after forming the green sheets with a doctor blade.
The density of the green sheet was calculated by extracting a portion each time and measuring its weight.
上記の如くグリーンシート成形後、その都度測定してい
たのでは生産ラインがストップし、生産能率の低下を招
く。しかもたとえその密度が異常であったとしてもグリ
ーンシートの原材料スラリーをコントロールして密度の
改善を図れず、歩留低下をも招く。If measurements were taken each time after forming a green sheet as described above, the production line would stop, leading to a decrease in production efficiency. Moreover, even if the density is abnormal, it is impossible to control the raw material slurry of the green sheet to improve the density, resulting in a decrease in yield.
本発明はグリーンシート成形工程をストップせずに行う
グリーンシートの密度測定（推定）方法を提供すること
を目的とする。An object of the present invention is to provide a method for measuring (estimating) the density of a green sheet without stopping the green sheet forming process.
上記課題は、本発明によればグリーンシートの密度ノ測
定に際し、特定のセラミック原料粉末と特定の溶剤とを
含んでなるスラリーを、上部を除いて同一断面積を有す
るスラリー容器内に収納し、該スラリー容器を遠心分離
器にかけ前記スラリー容器内でセラミック分層と、溶剤
分層とに分離させ、それぞれの層高さから溶剤分／セラ
ミック分の体積比を一方で求めておき、他方、前記スラ
リーを用いて得られたグリーンシートの一部の体積とそ
の重量から密度を求めることによって前記体積比と密度
の関係を複数対求めて検量線を作成し、次に求める前記
と同材料からなるスラリーの前記体積比を前記と同様に
して求め前記検量線からグリーンシートの密度を推定す
ることを特徴とするグリーンシートの密度測定方法によ
って解決される。According to the present invention, when measuring the density of a green sheet, a slurry containing a specific ceramic raw material powder and a specific solvent is stored in a slurry container having the same cross-sectional area except for the upper part, The slurry container is centrifuged to separate a ceramic layer and a solvent layer in the slurry container, and the volume ratio of solvent/ceramic is determined from the height of each layer. By determining the density from the volume of a part of the green sheet obtained using the slurry and its weight, a calibration curve is created by determining multiple pairs of relationships between the volume ratio and density, and then a calibration curve made of the same material as above is determined. The problem is solved by a green sheet density measuring method characterized in that the volume ratio of the slurry is determined in the same manner as described above and the density of the green sheet is estimated from the calibration curve.
［作 用］
本発明によれば、予め同一材料のグリーンシートの密度
が検量線によりスラリーの溶剤分とセラミック分の体積
比に関連させであるので、上記と同一材料からなるスラ
リーの上記体積比を抜き取り調査すればグリーンシート
の密度が推定され、その差異を後工程の板厚、密度均一
化のための乾燥工程にフィードバックすることが可能と
なる。[Function] According to the present invention, since the density of the green sheet made of the same material is related to the volume ratio of the solvent content and the ceramic content of the slurry in advance using a calibration curve, the above volume ratio of the slurry made of the same material as above is By conducting a sampling survey, the density of the green sheet can be estimated, and the difference can be fed back to the subsequent drying process to equalize the board thickness and density.
〔実施例］ 以下本発明の実施例を図面に基づいて説明する。〔Example] Embodiments of the present invention will be described below based on the drawings.
アルミナ粉末１、ホウ珪酸ガラス１、石英ガラス１を公
知のボールミルで整粒し、そして混練しメチルエチルケ
トン（ＭＥＫ） 、アセトンの溶剤、ＰＭ？ＩＡ等のア
クリル樹脂のバインダー、ジブチルフタレートの可望剤
を含んだスラリーを作製した。Alumina powder (1), borosilicate glass (1), and quartz glass (1) were sized using a known ball mill, and then kneaded and mixed with methyl ethyl ketone (MEK), an acetone solvent, and PM? A slurry containing an acrylic resin binder such as IA and a dibutyl phthalate stabilizer was prepared.
このスラリーを１部（５０ｍ）を第１図に示した容器ｌ
内にサンプリングした。２はスラリーを示す。One part (50 m) of this slurry was placed in the container l shown in Figure 1.
sampled within. 2 indicates slurry.
次に上記容器缶遠心分離器にかけスラリーの溶剤分とセ
ラミック分に分離させる。第２図は遠心分離によって得
られたスラリーを示す模式断面図である。スラリー２は
上が溶剤分層３下がセラミック分層４に分けられる。遠
心分離条件は３０００ｒｐｍ、１０分とした。Next, the slurry is passed through the container centrifuge to separate it into a solvent component and a ceramic component. FIG. 2 is a schematic cross-sectional view showing a slurry obtained by centrifugation. The slurry 2 is divided into an upper solvent layer 3 and a lower ceramic layer 4. The centrifugation conditions were 3000 rpm and 10 minutes.
スラリーの容器１は上方を除いて水平断面積が一定であ
るのを用いているので溶剤分３とセラミック分４のそれ
ぞれの高さ比が体積比となる。本実施例では第３図に示
す如き、グリーンシート密度と溶剤分／セラミック分体
積比の関係（検量線）が得られた。Since the slurry container 1 has a constant horizontal cross-sectional area except for the upper part, the height ratio of the solvent component 3 and the ceramic component 4 is the volume ratio. In this example, a relationship (calibration curve) between green sheet density and solvent/ceramic volume ratio as shown in FIG. 3 was obtained.
上記検量線を作成した後、同種のセラミック溶剤を用い
る何種のセラミックからなるグリーンシートの密度はス
ラリー状で溶剤分／セラミック分の体積比を求めたとこ
ろは−０，５であった。従って第３図検量線からグリー
ンシートの密度は約１．４であることがわかる。従って
このような方法で例えば同一ロソトのスラリーを何回か
抜き取りサンプリングを行いグリーンシートの密度の異
同が推定でき、セラミック分あるいは溶剤分のいずれか
を増加あるいは減少させることによってグリーンシート
の密度をコントロールできるし、また後工程の乾燥条件
を変更させ板厚、密度の均一化を図れた。After creating the above calibration curve, the density of green sheets made of several types of ceramics using the same type of ceramic solvent was determined as a slurry, and the volume ratio of solvent/ceramic was determined to be -0.5. Therefore, it can be seen from the calibration curve in Figure 3 that the density of the green sheet is approximately 1.4. Therefore, using this method, it is possible to estimate the difference in the density of the green sheets by sampling the same slurry several times, and by increasing or decreasing either the ceramic content or the solvent content, the density of the green sheets can be controlled. Moreover, by changing the drying conditions in the post-process, we were able to make the board thickness and density more uniform.
〔発明の効果］
以上説明した様に本発明によれば、グリーンシート成形
時のグリーンシートの密度を成形前のスラリー状で測定
（推定）することが出来、板厚、密度の均一化生産性向
上に寄与する。[Effects of the Invention] As explained above, according to the present invention, the density of the green sheet during green sheet molding can be measured (estimated) in the slurry state before molding, and the productivity of uniform plate thickness and density can be improved. Contribute to improvement.
第１図はスラリーの遠心分離前の状態を示す概略断面図
であり、
第２図は第１図のスラリーを遠心分離した後の状態を示
す概略断面図であり、
第３図はグリーンシート密度とスラリーの溶剤分／セラ
ミック分の体積比との関係を示す検量線である。
１・・・容器、 ２・・・スラリー３・・−
溶剤分層、 ４・・・セラミック分層。Figure 1 is a schematic sectional view showing the state of the slurry before centrifugation, Figure 2 is a schematic sectional view showing the state of the slurry in Figure 1 after centrifugation, and Figure 3 is the green sheet density. This is a calibration curve showing the relationship between the volume ratio of the solvent component to the ceramic component of the slurry. 1... Container, 2... Slurry 3...-
Solvent layer, 4...Ceramic layer.
Claims (1)
ック原料粉末と特定の溶剤とを含んでなるスラリーを、
上部を除いて同一断面積を有するスラリー容器内に収納
し、該スラリー容器を遠心分離器にかけ前記スラリー容
器内でセラミック分層と、溶剤分層とに分離させ、それ
ぞれの層高さから溶剤分／セラミック分の体積比を一方
で求めておき、他方、前記スラリーを用いて得られたグ
リーンシートの一部の体積とその重量から密度を求める
ことによって前記体積比と密度の関係を複数対求めて検
量線を作成し、次に求める前記と同材料からなるスラリ
ーの前記体積比を前記と同様にして求め前記検量線から
グリーンシートの密度を推定することを特徴とするグリ
ーンシートの密度測定方法。1. When measuring the density of green sheets, a slurry containing a specific ceramic raw material powder and a specific solvent,
The slurry container is placed in a slurry container having the same cross-sectional area except for the upper part, and the slurry container is centrifuged to separate the ceramic layer and the solvent layer in the slurry container. /The volume ratio of the ceramic component is determined on the one hand, and on the other hand, the density is determined from the volume of a part of the green sheet obtained using the slurry and its weight, thereby determining a plurality of relationships between the volume ratio and the density. A method for measuring the density of a green sheet, characterized in that a calibration curve is created, and then the volume ratio of the slurry made of the same material is determined in the same manner as described above, and the density of the green sheet is estimated from the calibration curve. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19900190A JPH0778465B2 (en) | 1990-07-30 | 1990-07-30 | Green sheet density measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19900190A JPH0778465B2 (en) | 1990-07-30 | 1990-07-30 | Green sheet density measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0486543A true JPH0486543A (en) | 1992-03-19 |
| JPH0778465B2 JPH0778465B2 (en) | 1995-08-23 |
Family
ID=16400451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19900190A Expired - Lifetime JPH0778465B2 (en) | 1990-07-30 | 1990-07-30 | Green sheet density measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0778465B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014163759A (en) * | 2013-02-22 | 2014-09-08 | Land Craft Co Ltd | Soil sedimentation analytic method |
-
1990
- 1990-07-30 JP JP19900190A patent/JPH0778465B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014163759A (en) * | 2013-02-22 | 2014-09-08 | Land Craft Co Ltd | Soil sedimentation analytic method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0778465B2 (en) | 1995-08-23 |
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