JPH04300235A - Production of ceramic body - Google Patents
Production of ceramic bodyInfo
- Publication number
- JPH04300235A JPH04300235A JP3086004A JP8600491A JPH04300235A JP H04300235 A JPH04300235 A JP H04300235A JP 3086004 A JP3086004 A JP 3086004A JP 8600491 A JP8600491 A JP 8600491A JP H04300235 A JPH04300235 A JP H04300235A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- defective
- ball mill
- raw
- ceramic material
- 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 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 230000002950 deficient Effects 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 7
- 239000011230 binding agent Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 239000000758 substrate Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000007606 doctor blade method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910002370 SrTiO3 Inorganic materials 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、例えば誘電体材料、
絶縁体材料、半導体材料または圧電体材料等として用い
られるセラミックス素地の製造方法に関するものである
。[Industrial Application Field] This invention is applicable to dielectric materials, for example.
The present invention relates to a method of manufacturing a ceramic base used as an insulator material, a semiconductor material, a piezoelectric material, or the like.
【０００２】0002
【従来の技術】一般に、セラミックス素地は次のように
して製造されている。まず、所定成分の各セラミックス
原料を秤量し、これらをボールミル、攪拌機または分散
機で湿式混合し、この湿式混合したものをその材料系の
適正条件で仮焼する。この仮焼によって各セラミックス
原料が反応し、セラミックス生原料（仮焼生成物）が生
成する。2. Description of the Related Art Ceramic bases are generally manufactured in the following manner. First, ceramic raw materials having predetermined components are weighed, wet-mixed using a ball mill, stirrer, or disperser, and the wet-mixed mixture is calcined under appropriate conditions for the material system. Through this calcination, each ceramic raw material reacts, and a raw ceramic raw material (calcined product) is generated.
【０００３】次に、このセラミックス生原料を再びボー
ルミル、攪拌機または分散機等で湿式粉砕し、乾燥させ
た後、有機バインダーを加えてスラリー化し、これをド
クターブレード法、押出成型法または乾式成型法でシー
ト化してグリーンシートを形成する。そして、このグリ
ーンシートを所定形状に成型し、この成型物を加熱炉内
においてこの材料系の適正条件で焼成してセラミックス
生原料の粒子を焼結させ、セラミックス素地を得る。Next, this raw ceramic raw material is wet-pulverized again using a ball mill, a stirrer, or a dispersion machine, dried, and then an organic binder is added to form a slurry, which is then processed by the doctor blade method, extrusion molding method, or dry molding method. to form a green sheet. Then, this green sheet is molded into a predetermined shape, and this molded product is fired in a heating furnace under appropriate conditions for this material system to sinter the particles of the ceramic raw material to obtain a ceramic base.
【０００４】0004
【発明が解決しようとする課題】しかし、上記のような
方法でセラミックス素地を製造する場合、焼成の段階で
セラミックス素地の一部に外観異常（素地の反りや融着
）を生じることがある。このような外観異常を生じた素
地は電極形成工程や仕上工程で不良品となるため、セラ
ミックス素地の段階で選別され、不良素地として破棄さ
れる。この不良率は材料系（誘電体、絶縁体、半導体又
は圧電体）によってまちまちであるが、製造されたセラ
ミックス素地全体の約１０〜１５％も有り、この不良素
地のためにセラミックス素地の製造コストが高くなって
いた。[Problems to be Solved by the Invention] However, when a ceramic base is manufactured by the above method, an abnormal appearance (warping or fusion of the base) may occur in a part of the ceramic base during the firing stage. A base material with such an abnormal appearance becomes a defective product in an electrode forming process or a finishing process, so it is selected at the ceramic base stage and discarded as a defective base material. This defective rate varies depending on the material type (dielectric, insulator, semiconductor, or piezoelectric), but it is about 10 to 15% of the total ceramic substrates manufactured, and the manufacturing cost of ceramic substrates increases due to this defective substrate. was rising.
【０００５】[0005]
【課題を解決するための手段】本発明は、外観不良のセ
ラミックス素地を粉砕し、所定粒度に精製したもの（不
良素地粉）をセラミックス生原料中へ適宜量混合して再
利用することにより上記課題を解決したものである。こ
こで、外観不良のセラミックス素地はその平均粒径が１
０〜２０μ以下となるように粉砕するのが好ましい。ま
た、セラミックス生原料中へ混合する不良素地粉の混合
量は１〜４ｗｔ％が好ましい。不良素地粉の混合量が４
ｗｔ％を越えると、セラミックス素地の電気的諸特性が
劣化するからである。[Means for Solving the Problems] The present invention achieves the above-described problems by pulverizing a ceramic base having poor appearance and refining it to a predetermined particle size (defective base powder) by mixing an appropriate amount into raw ceramic raw materials and reusing the powder. This is a solution to a problem. Here, the average grain size of the ceramic base with poor appearance is 1
It is preferable to grind the powder to a size of 0 to 20 μm or less. Further, the amount of the defective base powder mixed into the ceramic raw material is preferably 1 to 4 wt%. The mixed amount of defective base powder is 4
This is because, if it exceeds wt%, the electrical characteristics of the ceramic base will deteriorate.
【０００６】[0006]
【作用】本発明においては、外観不良のセラミックス素
地を粉砕、精製して得られた不良素地粉の平均粒径を１
０〜２０μ、セラミックス生原料への添加量を１〜４ｗ
ｔ％としたので、この不良素地粉をセラミックス生原料
へ混合すれば、セラミックス生原料の一部となる。[Operation] In the present invention, the average particle size of the defective base powder obtained by crushing and refining the ceramic base with poor appearance is reduced to 1
0~20μ, the amount added to ceramic raw materials is 1~4w
t%, so if this defective base powder is mixed into the raw ceramic raw material, it becomes a part of the raw ceramic raw material.
【０００７】[0007]
【実施例】実施例１及び比較例１
まず、複合セラミックス系材料（誘電体材料）を製造す
るための原料粉末を各々秤量し、これらをボールミルで
湿式混合した後、仮焼し、この仮焼によって得られたも
のをボールミルで湿式粉砕してセラミックス生原料を得
た。[Example] Example 1 and Comparative Example 1 First, raw material powders for producing a composite ceramic material (dielectric material) were each weighed, mixed wet in a ball mill, and then calcined. The obtained material was wet-pulverized in a ball mill to obtain a ceramic raw material.
【０００８】また、予め複合セラミックス系材料のセラ
ミックス素地の外観不良品を回収しておき、これらをら
いかい機により粗粉砕し、更にボールミルで平均粒径が
１０〜２０μ以下になるまで湿式粉砕して、不良素地粉
を得た。[0008] In addition, products with defective appearance of ceramic bases of composite ceramic materials are collected in advance, and these are coarsely pulverized using a grinder, and then wet-pulverized using a ball mill until the average particle size becomes 10 to 20 μm or less. A defective base powder was obtained.
【０００９】次に、この不良素地粉を前記のセラミック
ス生原料の中へ、０，１，２，３，４，５，１０及び２
０ｗｔ％の割合で添加し、ボールミルで混合し、乾燥さ
せ、有機バインダーを加えてスラリー化し、これをドク
ターブレード法によってグリーンシートとし、このグリ
ーンシートを円板状に打ち抜き、焼成してセラミックス
素地を得た。[0009] Next, this defective base powder was poured into the ceramic raw material mentioned above, and 0, 1, 2, 3, 4, 5, 10 and 2
It is added at a ratio of 0 wt%, mixed in a ball mill, dried, and an organic binder is added to form a slurry. This is made into a green sheet using the doctor blade method. This green sheet is punched into a disc shape and fired to form a ceramic base. Obtained.
【００１０】次に、これらのセラミックス素地の表裏面
に銀ペーストを印刷し、これを焼き付けて電極とし、こ
れらのセラミックス素地の電気的諸特性（誘電率ε、品
質係数（Ｑ）、絶縁抵抗［ＭΩ］、温度特性［−２５℃
／＋８５℃］ 、電気機械結合係数Ｋｐ）を測定した。
測定の結果、電気的諸特性は表１に示す通りとなった。[0010] Next, silver paste is printed on the front and back surfaces of these ceramic bases, and this is baked to form electrodes, and the electrical properties of these ceramic bases (dielectric constant ε, quality factor (Q), insulation resistance [ MΩ], temperature characteristics [-25℃
/+85°C], the electromechanical coupling coefficient Kp) was measured. As a result of the measurement, various electrical characteristics were as shown in Table 1.
【００１１】実施例２及び比較例２
ＢａＴｉＯ３ 系絶縁体材料を製造するための原料粉末
と、この絶縁体材料と同一材質のセラミックス素地の外
観不良品とを用い、実施例１と同様にして各セラミック
ス素地を形成し、それらの電気的諸特性（誘電率ε、ｔ
ａｎδ、絶縁抵抗［ＭΩ］、温度特性［−２５℃／＋８
５℃］ 、電気機械結合係数Ｋｐ ）を測定した。測定
の結果、電気的諸特性は表１に示す通りとなった。Example 2 and Comparative Example 2 Using raw material powder for producing a BaTiO3-based insulator material and a defective appearance product made of a ceramic base made of the same material as the insulator material, each sample was prepared in the same manner as in Example 1. A ceramic matrix is formed, and its electrical properties (permittivity ε, t
anδ, insulation resistance [MΩ], temperature characteristics [-25℃/+8
5° C.] and the electromechanical coupling coefficient Kp). As a result of the measurement, various electrical characteristics were as shown in Table 1.
【００１２】実施例３及び比較例３
ＳｒＴｉＯ３ 系半導体材料を製造するための原料粉末
と、この半導体材料と同一材質のセラミックス素地の外
観不良品とを用い、実施例１と同様にして各セラミック
ス素地を形成し、それらの電気的諸特性（誘電率ε、ｔ
ａｎδ、絶縁抵抗［ＭΩ］、温度特性［−２５℃／＋８
５℃］ 、電気機械結合係数Ｋｐ ）を測定した。電気
的諸特性は表１に示す通りとなった。Example 3 and Comparative Example 3 Each ceramic substrate was prepared in the same manner as in Example 1 using raw material powder for producing an SrTiO3-based semiconductor material and a defective appearance ceramic substrate made of the same material as the semiconductor material. and their electrical properties (permittivity ε, t
anδ, insulation resistance [MΩ], temperature characteristics [-25℃/+8
5° C.] and the electromechanical coupling coefficient Kp). The electrical characteristics were as shown in Table 1.
【００１３】実施例４及び比較例４
ＰＺＴ系圧電体材料を製造するための原料粉末と、この
圧電体材料と同一材質のセラミックス素地の外観不良品
とを用い、実施例１と同様にして各セラミックス素地を
形成し、それらの電気的諸特性（誘電率ε、ｔａｎδ、
絶縁抵抗［ＭΩ］、温度特性［−２５℃／＋８５℃］
、電気機械結合係数Ｋｐ ）を測定した。電気的諸特性
は表１に示す通りとなった。Example 4 and Comparative Example 4 Using raw material powder for producing a PZT piezoelectric material and a defective appearance product made of a ceramic base made of the same material as the piezoelectric material, each sample was prepared in the same manner as in Example 1. Form a ceramic matrix and improve its electrical properties (dielectric constant ε, tan δ,
Insulation resistance [MΩ], temperature characteristics [-25℃/+85℃]
, electromechanical coupling coefficient Kp) were measured. The electrical characteristics were as shown in Table 1.
【００１４】[0014]
【表１】[Table 1]
【００１５】表１に示された結果からみて、含有されて
いる不良素地粉の量が０〜４ｗｔ％の場合は所望の電気
的諸特性が得られるが、含有されている不良素地粉の量
が４ｗｔ％を越えると電気的特性が低下することがわか
る。従って、電気的諸特性の劣化を招かない添加範囲と
しては１〜４ｗｔ％が好ましい。[0015] From the results shown in Table 1, desired electrical properties can be obtained when the amount of defective base powder contained is 0 to 4 wt%, but the amount of defective base powder contained is It can be seen that when the amount exceeds 4 wt%, the electrical characteristics deteriorate. Therefore, the preferred addition range is 1 to 4 wt%, which does not cause deterioration of electrical properties.
【００１６】[0016]
【発明の効果】本発明は、セラミックス素地の外観不良
品をセラミックス素地の原料であるセラミックス生原料
の一部として再利用することができるので、セラミック
ス素地の原料の無駄を削減することができ、従って、セ
ラミックス素地の製造コストを低減させることができる
という効果がある。[Effects of the Invention] According to the present invention, it is possible to reuse the appearance-defective products of ceramic bodies as part of raw ceramic raw materials, which are the raw materials for ceramic bodies, so that the waste of raw materials for ceramic bodies can be reduced. Therefore, there is an effect that the manufacturing cost of the ceramic base can be reduced.
Claims (2)
て得られた所定粒度の不良素地粉をセラミックス生原料
中に所定量加えることを特徴とするセラミックス素地の
製造方法。1. A method for producing a ceramic base, which comprises adding a predetermined amount of defective base powder of a predetermined particle size obtained by pulverizing a ceramic base having a poor appearance to a raw ceramic raw material.
地粉の平均粒径を１０〜２０μ以下、添加量を１〜４ｗ
ｔ％としたことを特徴とする請求項１記載のセラミック
ス素地の製造方法。[Claim 2] The average particle size of the defective base powder added to the raw ceramic raw material is 10 to 20 μm or less, and the amount added is 1 to 4 w.
2. The method for manufacturing a ceramic base according to claim 1, wherein t%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3086004A JPH04300235A (en) | 1991-03-27 | 1991-03-27 | Production of ceramic body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3086004A JPH04300235A (en) | 1991-03-27 | 1991-03-27 | Production of ceramic body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04300235A true JPH04300235A (en) | 1992-10-23 |
Family
ID=13874538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3086004A Pending JPH04300235A (en) | 1991-03-27 | 1991-03-27 | Production of ceramic body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04300235A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020027024A (en) * | 2000-10-04 | 2002-04-13 | 강종봉 | Method for manufacturing ceramic pulverulent to be added for manufacturing synthetic fiber of high functional |
| CN112341155A (en) * | 2020-11-27 | 2021-02-09 | 于大鹏 | Method for manufacturing large-size ceramic ware |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345551A (en) * | 1989-07-14 | 1991-02-27 | Shin Nippon Kanetsu Kako Kk | Production of dry type molded roof tile |
-
1991
- 1991-03-27 JP JP3086004A patent/JPH04300235A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345551A (en) * | 1989-07-14 | 1991-02-27 | Shin Nippon Kanetsu Kako Kk | Production of dry type molded roof tile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020027024A (en) * | 2000-10-04 | 2002-04-13 | 강종봉 | Method for manufacturing ceramic pulverulent to be added for manufacturing synthetic fiber of high functional |
| CN112341155A (en) * | 2020-11-27 | 2021-02-09 | 于大鹏 | Method for manufacturing large-size ceramic ware |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19950711 |