JP2523665B2 - Method of manufacturing voltage non-linear resistor - Google Patents
Method of manufacturing voltage non-linear resistorInfo
- Publication number
- JP2523665B2 JP2523665B2 JP62186207A JP18620787A JP2523665B2 JP 2523665 B2 JP2523665 B2 JP 2523665B2 JP 62186207 A JP62186207 A JP 62186207A JP 18620787 A JP18620787 A JP 18620787A JP 2523665 B2 JP2523665 B2 JP 2523665B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- voltage non
- voltage
- linear resistor
- electrode
- 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
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- Thermistors And Varistors (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は各種電気機器を誘導雷等の異常電圧から保護
するための電圧非直線抵抗器の製造方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a voltage non-linear resistor for protecting various electric devices from abnormal voltage such as inductive lightning.
従来の技術 従来、電圧非直線抵抗器においては、特性を安定化さ
せるためにガラス拡散を行うことが行われている。そし
て、この方法としては、電圧非直線抵抗素子を焼結後、
電極材としての銀ペースト中に予めガラス成分を添加し
電極焼付けと同時にガラス成分を拡散させる方法と、ガ
ラスペーストを焼結体に全面あるいは部分的に塗布焼付
けし、ガラス成分を拡散させる（電極形式はそののちに
行われる）方法とが知られている。2. Description of the Related Art Conventionally, in voltage non-linear resistors, glass diffusion is performed to stabilize the characteristics. And as this method, after sintering the voltage non-linear resistance element,
A method in which a glass component is added in advance to the silver paste as an electrode material and the glass component is diffused at the same time as the electrode is baked, and a glass paste is applied to the sintered body entirely or partially and baked to diffuse the glass component (electrode type). Is done after that) method is known.
発明が解決しようとする問題点 このように従来の前者の方法で銀ペーストを用いるこ
とは高価になり、また焼結体に後からガラス拡散を行う
後者の方法では金属溶射電極を形成することができ、こ
の点は安価であるが、ガラスの焼付温度が800℃〜900℃
と低いために拡散のバラツキを生じ、課電寿命性能が劣
っているという問題があった。Problems to be Solved by the Invention As described above, it is expensive to use the silver paste in the former method of the related art, and the metal sprayed electrode can be formed in the latter method of diffusing glass into the sintered body later. Yes, this is inexpensive, but the baking temperature of glass is 800 ℃ ~ 900 ℃
Therefore, there is a problem in that the dispersion of the diffusion is caused and the life performance of charging is inferior.
本発明はこのような問題点に解決しようとするもので
あり、金属溶射電極であっても課電寿命性能の優れた電
圧非直線抵抗器を提供することを目的とするものであ
る。The present invention is intended to solve such a problem, and an object thereof is to provide a voltage non-linear resistor excellent in life performance even if it is a metal sprayed electrode.
問題点を解決するための手段 この問題点を解決するため本発明は、酸化亜鉛を主成
分とする電圧非直線抵抗素子の電極形成部に予め硼硅酸
ビスマス系のガラスペーストを塗布し、焼結と同時にガ
ラス成分の拡散を行うようにしたものである。Means for Solving the Problems In order to solve this problem, the present invention applies a bismuth borosilicate-based glass paste in advance to an electrode forming portion of a voltage non-linear resistance element containing zinc oxide as a main component, followed by baking. At the same time as binding, the glass component is diffused.
作用 本発明は前述のように電圧非直線抵抗素子にガラス成
分を拡散させることにより、電圧非直線抵抗器の特性を
安定化させ、課電寿命性能を向上させるものである。Function The present invention stabilizes the characteristics of the voltage non-linear resistor by diffusing the glass component in the voltage non-linear resistance element as described above, and improves the voltage application life performance.
実施例 以下、本発明の一実施例について説明する。まず、Zn
O（酸化亜鉛）の粉末にBi2O3（酸化ビスマス），Co2O3
（酸化コバルト），MnO2（酸化マンガン），Sb2O3（酸
化アンチモン），Cr2O3（酸化クロム），SiO2（酸化ケ
イ素）をそれぞれ0.01〜10mol％添加し、残部がZnO（酸
化亜鉛）となるような材料を準備し、これを混合し、造
粒し、成形し、仮焼を施した。しかるのちにこの仮焼体
の電極形成部となる両平面に硼硅酸ビスマス系のガラス
ペーストをスクリーン印刷にて塗布し、1000℃〜1300℃
の温度にて焼成した。この材料を用いてガラスペースト
の塗布量を変えることにより、ガラス層の拡散深さが0.
5〜10mmとなる焼結体を種々用意した。なお、焼結体の
寸法は直径30mm,厚み32mmであった。Example Hereinafter, an example of the present invention will be described. First, Zn
Bi (O 2 ) 3 (bismuth oxide), Co 2 O 3 on O (zinc oxide) powder
(Cobalt oxide), MnO 2 (manganese oxide), Sb 2 O 3 (antimony oxide), Cr 2 O 3 (chromium oxide), and SiO 2 (silicon oxide) were added in 0.01-10 mol% each, and the balance was ZnO (oxidized). Zinc) was prepared, mixed, granulated, molded and calcined. After that, apply a bismuth borosilicate glass paste by screen printing on both planes that will be the electrode formation part of this calcined body, 1000 ℃ ~ 1300 ℃
It was fired at the temperature of. By changing the coating amount of the glass paste using this material, the diffusion depth of the glass layer becomes 0.
Various sintered bodies having a size of 5 to 10 mm were prepared. The dimensions of the sintered body were 30 mm in diameter and 32 mm in thickness.
その後、第１図に示すように焼結体１の両平面を研磨
し、金属溶射による電極２を形成した。次に、電圧非直
線抵抗器の課電寿命性能を評価するために、前述の素子
を130℃の恒温槽内に入れ、バリスタ電圧の90％となる
ように交流電圧の最大値を印加し、そのときの漏洩電流
を計測した。After that, as shown in FIG. 1, both surfaces of the sintered body 1 were polished to form an electrode 2 by metal spraying. Next, in order to evaluate the voltage application life performance of the voltage non-linear resistor, the above-mentioned element was placed in a constant temperature bath at 130 ° C, and the maximum value of the AC voltage was applied so as to be 90% of the varistor voltage, The leakage current at that time was measured.
ここで、試料としては、ZnO 97mol％に、Bi2O3などの
６種の金属酸化物をそれぞれ0.5mol％添加したものを用
い、焼成温度は1150℃で行った。また、金属溶射による
電極としてはアルミニウムで構成したものとし、ガラス
成分の拡散深さは10mmとした。The sample used here was 97 mol% ZnO to which 0.5 mol% of each of six metal oxides such as Bi 2 O 3 was added, and the firing temperature was 1150 ° C. The metal sprayed electrode was made of aluminum, and the diffusion depth of the glass component was 10 mm.
第２図にこのようにして得られた電圧非直線抵抗器の
課電寿命特性を曲線Ａで示しており、曲線B,Cはそれぞ
れ比較のため準備したガラス成分を拡散させずに焼結し
たものと、焼結後にガラス拡散を行ったものの特性を示
しており、添加する金属酸化物の種類や量，焼成温度，
ガラスペーストなどは本発明の場合と同一で行った。FIG. 2 shows a voltage A characteristic of the voltage non-linear resistor thus obtained by a curve A. Curves B and C are the glass components prepared for comparison and sintered without diffusion. It shows the characteristics of the ones and the ones that were glass-diffused after sintering. The kind and amount of the metal oxide added, the firing temperature,
The glass paste and the like were the same as in the present invention.
第３図は電圧非直線抵抗素子内のガラス成分の拡散深
さと課電寿命性能の関係を示しており、前述条件の20時
間後の漏洩電流Ir20と初期電流Ir0との比で表わしてい
る。第２図において、曲線Ｄは電極２を溶射アルミニウ
ムとしたもの、曲線Ｅは第４図に示すように電極２にお
いて溶射アルミニウム2a上に溶射銅2bを設けたものであ
る。この第３図から明らかなように、金属溶射電極にお
いてガラス拡散深さを1mm以上とすると、20時間後の漏
洩電流の増加を抑制することができる。FIG. 3 shows the relationship between the diffusion depth of the glass component in the voltage non-linear resistance element and the charging life performance, which is expressed by the ratio of the leakage current Ir 20 after 20 hours and the initial current Ir 0 under the above conditions. There is. In FIG. 2, a curve D shows the electrode 2 made of sprayed aluminum, and a curve E shows the electrode 2 provided with the sprayed copper 2b on the sprayed aluminum 2a as shown in FIG. As is clear from FIG. 3, when the glass diffusion depth is 1 mm or more in the metal spray electrode, an increase in leakage current after 20 hours can be suppressed.
第２図及び第３図から明らかなように、本発明に係る
電圧非直線抵抗器は金属溶射電極にもかかわらず、課電
寿命性能を改善することができる。ここで、ガラス拡散
深さが1mm未満の場合、もれ電流が第３図に示すように
増加し、抵抗器が発熱して焼損することとなる。また、
ガラス拡散深さが15mmを超えると、工数面，価格面など
から不利となる点も多く、ガラス拡散深さは実用上15mm
以下に抑えることが好ましい。As is clear from FIG. 2 and FIG. 3, the voltage nonlinear resistor according to the present invention can improve the service life even if it is a metal spray electrode. Here, if the glass diffusion depth is less than 1 mm, the leakage current increases as shown in FIG. 3, and the resistor heats up and burns out. Also,
If the glass diffusion depth exceeds 15 mm, there are many disadvantages in terms of man-hours and price, and the glass diffusion depth is practically 15 mm.
It is preferable to suppress it to the following.
なお、ガラスペーストの塗布を、上記の実施例におい
てはスクリーン印刷で行った場合について説明したが、
これはディップなどで行ってもよいものであり、塗布の
均一性という点でスクリーン印刷が優れている。Incidentally, the application of the glass paste was described in the above-mentioned examples in the case of performing screen printing,
This may be done by dipping or the like, and screen printing is excellent in terms of coating uniformity.
また、主成分のZnOに添加する数種の金属酸化物とし
ては、上記実施例のものに限られることは当然ないもの
であり、添加量も種々変えて行ってもよいことはもちろ
んである。Further, the several kinds of metal oxides added to the main component ZnO are not limited to those in the above-mentioned examples, and it is needless to say that the addition amount may be variously changed.
発明の効果 以上のように、本発明によると予めガラス拡散を行う
ことにより、特性の安定化を図り、課電寿命性能を向上
させることができ、信頼性の高い電圧非直線抵抗器が製
造できる。また、ガラス拡散を焼結と同時に行うことに
より、ガラス焼付工程を省略することができるため、製
造コストの低減も可能であるという効果が得られる。EFFECTS OF THE INVENTION As described above, according to the present invention, by preliminarily performing glass diffusion, it is possible to stabilize the characteristics, improve the life span under voltage application, and manufacture a highly reliable voltage nonlinear resistor. . Further, since the glass baking step can be omitted by performing the glass diffusion simultaneously with the sintering, it is possible to reduce the manufacturing cost.
第１図は本発明の実施例に係わる電圧非直線抵抗器の断
面図、第２図は本発明方法により得られた電圧非直線抵
抗器の課電寿命特性を従来品の特性と比較して示す図、
第３図は本発明においてガラス成分の拡散深さと課電寿
命性能の関係を示す図、第４図は本発明の別の実施例を
示す電圧非直線抵抗器の断面図である。 １……焼結体、２……電極、2a……溶射アルミニウム、
2b……溶射銅。FIG. 1 is a sectional view of a voltage non-linear resistor according to an embodiment of the present invention, and FIG. 2 is a comparison of the voltage application life characteristics of the voltage non-linear resistor obtained by the method of the present invention with the characteristics of a conventional product. Figure showing,
FIG. 3 is a diagram showing the relationship between the diffusion depth of the glass component and the charging life performance in the present invention, and FIG. 4 is a sectional view of a voltage non-linear resistor showing another embodiment of the present invention. 1 ... sintered body, 2 ... electrode, 2a ... sprayed aluminum,
2b ... Sprayed copper.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 豊見 孝義 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭58−95801（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayoshi Toyomi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-58-95801 (JP, A)
Claims (2)
酸化物を添加し、これを混合，造粒，成形，仮焼を行っ
たのち、電極形成部に予め硼硅酸ビスマス系のガラスペ
ーストを塗布し、焼結と同時にガラス拡散を行い、少な
くとも拡散層の深さを1mm以上としたことを特徴とする
電圧非直線抵抗器の製造方法。1. A main component is zinc oxide, to which several kinds of metal oxides are added, which are mixed, granulated, molded and calcined, and then the electrode forming portion is preliminarily made of bismuth borosilicate. A method of manufacturing a voltage non-linear resistor, characterized in that a glass paste is applied, glass is diffused simultaneously with sintering, and the depth of the diffusion layer is at least 1 mm or more.
構成とした特許請求範囲第１項に記載の電圧非直線抵抗
器の製造方法。2. The method for manufacturing a voltage nonlinear resistor according to claim 1, wherein the paste is applied by screen printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62186207A JP2523665B2 (en) | 1987-07-24 | 1987-07-24 | Method of manufacturing voltage non-linear resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62186207A JP2523665B2 (en) | 1987-07-24 | 1987-07-24 | Method of manufacturing voltage non-linear resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6430204A JPS6430204A (en) | 1989-02-01 |
| JP2523665B2 true JP2523665B2 (en) | 1996-08-14 |
Family
ID=16184245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62186207A Expired - Lifetime JP2523665B2 (en) | 1987-07-24 | 1987-07-24 | Method of manufacturing voltage non-linear resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2523665B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0581969B1 (en) * | 1992-02-25 | 1999-10-06 | Matsushita Electric Industrial Co., Ltd. | Zinc oxide varistor and production thereof |
| JP3175500B2 (en) * | 1994-10-28 | 2001-06-11 | 株式会社日立製作所 | Voltage nonlinear resistor and method of manufacturing the same |
-
1987
- 1987-07-24 JP JP62186207A patent/JP2523665B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6430204A (en) | 1989-02-01 |
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Legal Events
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|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
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