JPH04170354A - Production of powdery starting material for ceramic capacitor - Google Patents
Production of powdery starting material for ceramic capacitorInfo
- Publication number
- JPH04170354A JPH04170354A JP2298425A JP29842590A JPH04170354A JP H04170354 A JPH04170354 A JP H04170354A JP 2298425 A JP2298425 A JP 2298425A JP 29842590 A JP29842590 A JP 29842590A JP H04170354 A JPH04170354 A JP H04170354A
- Authority
- JP
- Japan
- Prior art keywords
- starting material
- ceramic capacitor
- raw material
- additives
- mixed
- 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
- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000007858 starting material Substances 0.000 title abstract 10
- 239000000654 additive Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims description 39
- 230000000996 additive effect Effects 0.000 claims description 13
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000010298 pulverizing process Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910002976 CaZrO3 Inorganic materials 0.000 abstract 1
- 229910017676 MgTiO3 Inorganic materials 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はセラミックコンデンサ原料粉末の製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing ceramic capacitor raw material powder.
（従来技術ｙ
従来、第５図に示すように、ＢａＴｉ０．などの主原料
ｌに、ＣａＺｒＯ３，ＭｇＴｉ０ｚ 、Ａ１、Ｏ，、Ｓ
ｉｏ、などの微量添加物２を添加し、それをボールミ
ルで混合粉砕していた。 ゛（発明が解決しようとす
る課題）
しかしながら、各種材料の粒径が異なり、しかも添加物
が微量なため、短時間で均一に混合できなかった。均一
に混合できるように長時間混合すると、玉石から汚染し
たり、粉砕によって原料の比表面積が増加したりしてし
まい、後工程での取扱が面倒であった。(Prior art y) Conventionally, as shown in Fig. 5, main raw materials such as BaTi0.
io, etc. were added, and the mixture was mixed and ground using a ball mill. (Problems to be Solved by the Invention) However, since the particle sizes of the various materials are different and the amount of additives is small, it has not been possible to mix them uniformly in a short time. If the raw materials are mixed for a long time to ensure uniform mixing, they may be contaminated by cobbles or the specific surface area of the raw materials may increase due to pulverization, making handling in subsequent steps difficult.
それゆえに、この発明の主たる目的は、主原料と微量添
加物との混合度が向上し、均一組成の原料が得られるセ
ラミックコンデンサ原料粉末の製造方法を提供すること
である。Therefore, the main object of the present invention is to provide a method for producing a ceramic capacitor raw material powder that improves the degree of mixing of the main raw material and trace additives and provides a raw material with a uniform composition.
（課題を解決するための手段）
この発明は、主原料と微量添加物とを混合するセラミッ
クコンデンサ原料粉末の製造方法において、微量添加物
を混合粉砕したのち主原料を加えて混合することを特徴
とする、セラミックコンデンサ原料粉末の製造方法であ
る。(Means for Solving the Problems) The present invention is characterized in that in a method for producing ceramic capacitor raw material powder in which a main raw material and a trace additive are mixed, the trace additive is mixed and pulverized, and then the main raw material is added and mixed. This is a method for producing ceramic capacitor raw material powder.
（作用）
まず、微量添加物をまとめて混合粉砕することによって
、微量添加物が均一に粉砕される。それに主原料を加え
、さらに混合することによって、主原料と微量添加物と
の混合度が向上する。(Function) First, by mixing and pulverizing the trace additives all together, the trace additives are uniformly pulverized. By adding the main raw material thereto and further mixing, the degree of mixing between the main raw material and the trace additive is improved.
（発明の効果）
この発明によれば、主原料と微量添加物との混合度が向
上し、原料の組成が均一化される。したがって、このセ
ラミックコンデンサ原料粉末によって、均一な固溶体が
得られる。また、成形時に主原料がつくる空隙を微量添
加物が埋めるため、成形密度が向上する。したがって、
セラミックコンデンサの誘電率が高くなり、誘電率、電
圧のユニット間のばらつきが減少するなど、セラミック
コンデンサの電気特性が向上する。(Effects of the Invention) According to the present invention, the degree of mixing between the main raw material and the trace additive is improved, and the composition of the raw material is made uniform. Therefore, a uniform solid solution can be obtained using this ceramic capacitor raw material powder. Furthermore, since the trace additive fills the voids created by the main raw material during molding, the molding density improves. therefore,
The dielectric constant of ceramic capacitors increases, and the electrical characteristics of ceramic capacitors improve, such as by reducing variations in dielectric constant and voltage between units.
この発明の上述の目的、その他の目的、特徴および利点
は、図面を参照して行う以下の実施例の詳細な説明から
一層明らかとなろう。The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
（実施例）
第１図はこの発明によって得られるセラミックコンデン
サ原料粉末１０を示す図解図である。このセラミックコ
ンデンサ原料粉末１０の製造方法について説明する。(Example) FIG. 1 is an illustrative view showing a ceramic capacitor raw material powder 10 obtained by the present invention. A method of manufacturing this ceramic capacitor raw material powder 10 will be explained.
まず、第２図に示すように、（：ａＺｒ０３．ＭｇＴ
ｉ ０３ 、 ＡＪ！＊ Ｏｘ 、 Ｓ ｉ Ｏ□な
どの微量添加物１２をまとめて混合する。そして、第３
図に示すように、混合した微量添加物１２を粉砕する。First, as shown in Figure 2, (:aZr03.MgT
i03, AJ! * Trace additives 12 such as Ox, S i O□, etc. are mixed together. And the third
As shown in the figure, the mixed trace additive 12 is pulverized.
次に、混合した微量添加物１２を粉砕したものに主原料
１４であるＢａＴｊＯ，を加え混合する。Next, BaTjO, which is the main raw material 14, is added to the pulverized mixture of the minor additives 12 and mixed.
このようにして、主原料１４と微量添加物１２との混合
度が向上し、第１図に示す均一組成のセラミックコンデ
ンサ原料粉末１０が得られる。In this way, the degree of mixing between the main raw material 14 and the minor additive 12 is improved, and a ceramic capacitor raw material powder 10 having a uniform composition as shown in FIG. 1 is obtained.
なお、このようにして製造されたセラミックコンデンサ
原料粉末１０では、主原料１４であるＢａＴｉｏ、の粒
子１つに対し、微量添加物１２が均一に取り囲む状態と
なる。In the ceramic capacitor raw material powder 10 manufactured in this manner, each particle of BaTio, which is the main raw material 14, is uniformly surrounded by the trace additive 12.
第４図はこのセラミックコンデンサ原料粉末１０を用い
た成形体１６を示す図解図である。この成形時に主原料
１４のＢａＴｉＯｓがつくる空隙が、微量添加物１２に
よって埋められる。そのため、成形体１６の成形密度が
向上し、ボア容積も減少する。FIG. 4 is an illustrative view showing a molded body 16 using this ceramic capacitor raw material powder 10. The voids created by BaTiOs as the main raw material 14 during this molding are filled with the trace additive 12. Therefore, the molding density of the molded body 16 is improved and the bore volume is also reduced.
この発明によれば、主原料１４と微量添加物１２との混
合度が向上する。さらに、セラミックコンデンサ原料粉
末１０の組成が均一化され均一な固溶体が得られ、ユニ
ット内に強誘電体相が均一に分布する。According to this invention, the degree of mixing between the main raw material 14 and the trace additive 12 is improved. Furthermore, the composition of the ceramic capacitor raw material powder 10 is made uniform, a uniform solid solution is obtained, and the ferroelectric phase is uniformly distributed within the unit.
すなわち、このセラミックコンデンサ原料粉末１０を使
用して得られたセラミックコン、デンサは、誘電率が高
く、誘電率および絶縁抵抗のユニット間のばらつきが減
少する。したがって、セラミックコンデンサの電気特性
を向上させることができる。That is, the ceramic capacitors and capacitors obtained using this ceramic capacitor raw material powder 10 have a high dielectric constant, and variations in dielectric constant and insulation resistance between units are reduced. Therefore, the electrical characteristics of the ceramic capacitor can be improved.
第１図はこの発明によって得られるセラミックコンデン
サ原料粉末を示す図解図である。
第２図および第３図は第１図に示すセラミックコンデン
サ原料粉末の製造工程を示す図解図である。
第４図はこのセラミックコンデンサ原料粉末を用いた成
形体を示す図解図である。
第５図は従来の製造方法によって得られるセラミックコ
ンデンサ原料粉末を示す図解図である。
図において、１０はセラミックコンデンサ原料粉末、１
２は微量添加物、１４は主原料を示す。
第２図
第３図
第４図
■
第５図FIG. 1 is an illustrative diagram showing a ceramic capacitor raw material powder obtained by the present invention. FIGS. 2 and 3 are illustrative views showing the manufacturing process of the ceramic capacitor raw material powder shown in FIG. 1. FIG. 4 is an illustrative view showing a molded body using this ceramic capacitor raw material powder. FIG. 5 is an illustrative view showing ceramic capacitor raw material powder obtained by a conventional manufacturing method. In the figure, 10 is ceramic capacitor raw material powder, 1
2 indicates a trace additive, and 14 indicates a main raw material. Figure 2 Figure 3 Figure 4■ Figure 5
Claims (1)
原料粉末の製造方法において、 前記微量添加物を混合粉砕したのち前記主原料を加えて
混合することを特徴とする、セラミックコンデンサ原料
粉末の製造方法。[Claims] A method for producing a ceramic capacitor raw material powder in which a main raw material and a minor additive are mixed, characterized in that the minor additive is mixed and pulverized, and then the main raw material is added and mixed. Method for producing raw material powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2298425A JPH04170354A (en) | 1990-11-02 | 1990-11-02 | Production of powdery starting material for ceramic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2298425A JPH04170354A (en) | 1990-11-02 | 1990-11-02 | Production of powdery starting material for ceramic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04170354A true JPH04170354A (en) | 1992-06-18 |
Family
ID=17859540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2298425A Pending JPH04170354A (en) | 1990-11-02 | 1990-11-02 | Production of powdery starting material for ceramic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04170354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999025014A1 (en) * | 1997-11-10 | 1999-05-20 | Hitachi, Ltd. | Dielectric element and manufacturing method therefor |
-
1990
- 1990-11-02 JP JP2298425A patent/JPH04170354A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999025014A1 (en) * | 1997-11-10 | 1999-05-20 | Hitachi, Ltd. | Dielectric element and manufacturing method therefor |
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