JPH03134908A - Terminal electrode paste for ceramic electronic parts - Google Patents
Terminal electrode paste for ceramic electronic partsInfo
- Publication number
- JPH03134908A JPH03134908A JP27414789A JP27414789A JPH03134908A JP H03134908 A JPH03134908 A JP H03134908A JP 27414789 A JP27414789 A JP 27414789A JP 27414789 A JP27414789 A JP 27414789A JP H03134908 A JPH03134908 A JP H03134908A
- Authority
- JP
- Japan
- Prior art keywords
- terminal electrode
- formation
- free energy
- electrode paste
- powder
- 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
- 239000002003 electrode paste Substances 0.000 title claims abstract description 16
- 239000000919 ceramic Substances 0.000 title claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 3
- 239000000956 alloy Substances 0.000 claims abstract 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 229910052802 copper Inorganic materials 0.000 claims abstract 2
- 229910052737 gold Inorganic materials 0.000 claims abstract 2
- 229910052749 magnesium Inorganic materials 0.000 claims abstract 2
- 229910052763 palladium Inorganic materials 0.000 claims abstract 2
- 229910052697 platinum Inorganic materials 0.000 claims abstract 2
- 229910052710 silicon Inorganic materials 0.000 claims abstract 2
- 229910052709 silver Inorganic materials 0.000 claims abstract 2
- 150000002739 metals Chemical class 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 2
- 239000002075 main ingredient Substances 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910002090 carbon oxide Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052789 astatine Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Ceramic Capacitors (AREA)
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はセラミック電子部品において、金属粉末および
有機バインダーより成るペーストを塗布し、焼成するこ
とにより形成される端子電極の端子電極ペーストに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a terminal electrode paste for a terminal electrode in a ceramic electronic component, which is formed by applying a paste consisting of metal powder and an organic binder and firing the paste.
従来の技術
従来、セラミック電子部品の端子電極には、通常、Ａｇ
粉末およびＰｄ粉末、ガラス粉末、有機バインダー、溶
剤より成るペーストを塗布し、７００℃〜９００℃で焼
成することにより形成されていた。Conventional technology Conventionally, terminal electrodes of ceramic electronic components usually contain Ag.
It was formed by applying a paste consisting of powder, Pd powder, glass powder, an organic binder, and a solvent, and firing at 700°C to 900°C.
発明が解決しようとする課題
しかしながら上記の従来の構成では、セラミック材料に
よっては、端子電極ペーストを塗布し、焼成すると端子
電極表面に第１図に示す様な突起が発生する。この突起
の発生により、外観検査が必要となったり、取り除けな
い場合は寸法精度が悪くなるという欠点を有していた。Problems to be Solved by the Invention However, in the above-mentioned conventional structure, when a terminal electrode paste is applied and fired, depending on the ceramic material, protrusions as shown in FIG. 1 are generated on the surface of the terminal electrode. The occurrence of these protrusions has the disadvantage that an external appearance inspection is required and, if they cannot be removed, dimensional accuracy deteriorates.
本発明は上記従来の問題点を解決するもので、欠陥のな
い端子電極を形成することができる端子電極ペーストを
提供することを目的とする。The present invention solves the above-mentioned conventional problems, and aims to provide a terminal electrode paste that can form defect-free terminal electrodes.
課題を解決するための手段
この目的を達成するために本発明の端子電極ペーストは
、主成分である金属粉末、有機バインダー、およびガラ
ス粉末その他の添加物から成る端子電極ペースト中に、
酸化物の標準生成自由エネルギーが７００℃におけるＣ
Ｏの標準生成自由エネルギーより低い値をもつ金属粉末
を添加含有させたことを特徴とする。Means for Solving the Problems To achieve this object, the terminal electrode paste of the present invention contains a terminal electrode paste consisting of a metal powder as a main component, an organic binder, and glass powder and other additives.
C when the standard free energy of formation of the oxide is 700℃
It is characterized by the addition of a metal powder having a value lower than the standard free energy of formation of O.
また、上記添加する金属は、Ｓｉ、’ｌ’ｉ、Ｚｒ。Further, the metals to be added are Si, 'l'i, and Zr.
Ｖ、Ｍｎ、Ｃｒ、Ｔａ、Ｎｂ、Ｂ、Ｙ、Ｌａ、Ａｔ！
。V, Mn, Cr, Ta, Nb, B, Y, La, At!
.
Ｍｇのうち少くとも一種から成るものであり、０．０１
重量％〜１０重量％添加含有させることを特徴とする。Consists of at least one type of Mg, 0.01
It is characterized in that it is added in an amount of 10% by weight.
作用
本発明は上記の構成により以下の様に突起を防止するこ
とができる。Effect The present invention can prevent protrusions as described below with the above-described configuration.
端子電極ペーストに使用されている有機バインダーが、
焼成時に充分燃焼されず炭素として端子電極中に残留し
た状態となる。この状態でより高温になると、炭素と酸
素が反応して一酸化炭素となり酸素分圧が減少する。酸
素分圧が低い状態になると、セラミックおよび端子電極
中のガラスおよび添加物から加熱還元により酸素を放出
するものがあり、−酸化炭素ガスの発生は残留炭素が無
くなるまで続（ことになる。この−酸化炭素ガスの増加
により、セラミック焼結体と端子電極との界面に空洞を
つくるために突起が発生する。The organic binder used in the terminal electrode paste is
During firing, the carbon is not sufficiently combusted and remains as carbon in the terminal electrode. When the temperature rises in this state, carbon and oxygen react to form carbon monoxide and the oxygen partial pressure decreases. When the oxygen partial pressure becomes low, some of the glass and additives in the ceramic and terminal electrodes release oxygen by thermal reduction, and the generation of carbon oxide gas continues until there is no remaining carbon. - Due to the increase in carbon oxide gas, protrusions are generated to create cavities at the interface between the ceramic sintered body and the terminal electrode.
本発明の端子電極ペーストは、焼成時の温度で一酸化炭
素を還元できる金属を添加含有させているため、焼成時
において、密閉系の中の酸素は炭素と反応して一酸化炭
素を生成するよりも、金属酸化物を生成した方が安定と
なり、密閉系の中には、添加した金属の酸化物き固体の
炭素が反応生成物として残留する。即ち、−酸化炭素が
発生せず、突起発生を防止でき、外観検査をな（し、寸
法精度も向上する。Since the terminal electrode paste of the present invention contains a metal that can reduce carbon monoxide at the firing temperature, oxygen in the closed system reacts with carbon to generate carbon monoxide during firing. The production of metal oxides is more stable than the above, and solid carbon containing oxides of the added metals remains as a reaction product in the closed system. That is, -carbon oxide is not generated, protrusions can be prevented, appearance inspection is possible, and dimensional accuracy is improved.
実施例 以下、本発明の一実施例について説明する。Example An embodiment of the present invention will be described below.
ＢａＴｉＯ３系のセラミック焼結体にＴｉ（７００℃で
の標準生成自由エネルギー：２．０Ｘ１０５ｃａ ｌ／
ｇｍｄ○２）、Ｃｒ（７００℃での標準生成自由エネル
ギー＝１．４Ｘ１０５ｃａ ｌ／ｇｍｄｏ２）粉末を０
〜２０重量％含有するＡｇペーストを塗布する。Ti (standard free energy of formation at 700°C: 2.0 x 105 cal/
gmd○2), Cr (standard free energy of formation at 700°C = 1.4X105cal/gmdo2) powder to 0
Apply an Ag paste containing ~20% by weight.
又、比較用として、酸化物の標準生成自由エネルギーが
７００℃においてＣＯの標準生成自由エネルギー７００
℃での標準生成自由エネルギー＝１．０Ｘ１０５ｃａ
ｌ／ｇｍｄｏ２より高いＮ１（７００℃での標準生成自
由エネルギー；−７，ＯＸ １０４ｃ ａ ｌ／ｇｍｄ
ｏ２）粉末を０〜２０重量％含有するＡｇペーストを塗
布する。これらを乾燥させ、ピーク温度８００℃保持時
間１０分の温度カーブで焼成する。この素子５００ケ中
の端子電極表面の突起発生の素子数と端子電極表面を電
子顕微鏡で観察した結果を第１表〜第３表に示す。For comparison, when the standard free energy of formation of oxides is 700°C, the standard free energy of formation of CO is 700°C.
Standard free energy of formation at °C = 1.0X105ca
N1 higher than l/gmdo2 (standard free energy of formation at 700°C; -7, OX 104c a l/gmd
o2) Applying Ag paste containing 0-20% by weight of powder. These are dried and fired using a temperature curve at a peak temperature of 800°C for a holding time of 10 minutes. Tables 1 to 3 show the number of elements with protrusions on the surface of the terminal electrode among the 500 elements and the results of observing the surface of the terminal electrode with an electron microscope.
（以 下 余 白 ）
８
第１表〜第３表より、酸化物の標準生成自由エネルギー
が７００℃においてＣＯの標準生成自由エネルギーより
低いＴｉ、Ｃｒ粉末の添加により突起発生が防止できる
ことがわかる。(Margin below) 8 From Tables 1 to 3, it can be seen that the generation of protrusions can be prevented by adding Ti and Cr powders whose standard free energy of formation of oxides is lower than that of CO at 700°C.
以上の様に本実施例によれば、セラミック焼結体におい
て、Ａｇ粉末を主成分とし、有機バインダー、ガラス粉
末および酸化物の標準生成自由エネルギーが７００℃に
おいてＣＯの標準生成自由エネルギーより低い値をもつ
金属粉末を０．０１重量％〜１０重量％含有する端子電
極ペーストでは、焼成時に発生する端子電極上の突起の
発生を防止し、欠陥のない端子電極をもつセラミック電
子部品を提供することができる。As described above, according to this example, in the ceramic sintered body, the standard free energy of formation of the organic binder, glass powder, and oxide is lower than the standard free energy of formation of CO at 700°C, in which Ag powder is the main component. To provide a terminal electrode paste containing 0.01% to 10% by weight of metal powder having a 10% by weight, which prevents the formation of protrusions on the terminal electrode during firing, and provides a ceramic electronic component having a defect-free terminal electrode. Can be done.
発明の効果
以上の様に本発明の端子電極ペーストは、従来から使用
されている端子電極ペーストに、７００℃において酸化
物の標準生成自由エネルギーがＣＯのそれよりも低い金
属粉末を添加含有させることにより、−酸化炭素の発生
を防止することによって端子電極表面の突起発生を防止
するこ七ができ ０
る。これにより、外観検査の必要性がな（なり作業性の
向上、さらに寸法精度の向上にもなり、その効果は甚大
である。Effects of the Invention As described above, the terminal electrode paste of the present invention includes a conventionally used terminal electrode paste containing a metal powder whose standard free energy of formation of an oxide is lower than that of CO at 700°C. By preventing the generation of -carbon oxide, it is possible to prevent the formation of protrusions on the surface of the terminal electrode. This eliminates the need for visual inspection, improves workability, and improves dimensional accuracy, which has a tremendous effect.
第１図は外電ペーストによる外部電極表面突起の断面図
である。
１・・・・・・外部電極、２・・・・・・誘電体セラミ
ック、３・・・・・・外電突起、４・・・・・・内部電
極。FIG. 1 is a cross-sectional view of external electrode surface protrusions formed by external electrode paste. 1...External electrode, 2...Dielectric ceramic, 3...External electric projection, 4...Internal electrode.
Claims (3)
金のうち少くとも一種の粉末を主成分とし、有機バイン
ダーおよび酸化物の標準生成自由エネルギーが７００℃
におけるＣＯの標準生成自由エネルギーより低い値をも
つ金属粉末を添加物として含有することを特徴とするセ
ラミック電子部品用端子電極ペースト。(1) The main component is at least one powder of Au, Pt, Pd, Ag, Cu, and their alloys, and the standard free energy of formation of the organic binder and oxide is 700°C.
1. A terminal electrode paste for ceramic electronic components, characterized in that it contains as an additive a metal powder having a value lower than the standard free energy of formation of CO.
けるＣＯの標準生成自由エネルギーより低い値をもつ金
属が、Ｓｉ，Ｔｉ，Ｚｒ，Ｖ，Ｍｎ，Ｃｒ，Ｔａ，Ｎｂ
，Ｂ，Ｙ，Ｌａ，Ａｌ，Ｍｇのうち少くとも一種から成
ることを特徴とする請求項１記載のセラミック電子部品
用端子電極ペースト。(2) Metals whose standard free energy of formation of oxides is lower than the standard free energy of formation of CO at 700°C are Si, Ti, Zr, V, Mn, Cr, Ta, and Nb.
, B, Y, La, Al, and Mg.
けるＣＯの標準生成自由エネルギーより低い値をもつ金
属粉末が端子電極ペースト主成分に対し、０．０１重量
％〜１０重量％添加されてることを特徴とする請求項１
または２記載のセラミック電子部品用端子電極ペースト
。(3) Metal powder whose standard free energy of formation of an oxide is lower than the standard free energy of formation of CO at 700°C is added in an amount of 0.01% to 10% by weight based on the main component of the terminal electrode paste. Claim 1
Or the terminal electrode paste for ceramic electronic components according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27414789A JPH03134908A (en) | 1989-10-20 | 1989-10-20 | Terminal electrode paste for ceramic electronic parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27414789A JPH03134908A (en) | 1989-10-20 | 1989-10-20 | Terminal electrode paste for ceramic electronic parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03134908A true JPH03134908A (en) | 1991-06-07 |
Family
ID=17537680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27414789A Pending JPH03134908A (en) | 1989-10-20 | 1989-10-20 | Terminal electrode paste for ceramic electronic parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03134908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08153415A (en) * | 1994-11-29 | 1996-06-11 | Futaba Corp | Conductive paste |
| CN111366528A (en) * | 2020-06-01 | 2020-07-03 | 广东电网有限责任公司东莞供电局 | Salt fog corrosion testing machine of conductive paste |
-
1989
- 1989-10-20 JP JP27414789A patent/JPH03134908A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08153415A (en) * | 1994-11-29 | 1996-06-11 | Futaba Corp | Conductive paste |
| CN111366528A (en) * | 2020-06-01 | 2020-07-03 | 广东电网有限责任公司东莞供电局 | Salt fog corrosion testing machine of conductive paste |
| CN111366528B (en) * | 2020-06-01 | 2020-08-18 | 广东电网有限责任公司东莞供电局 | Salt fog corrosion testing machine of conductive paste |
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