JPS6236609B2 - - Google Patents
Info
- Publication number
- JPS6236609B2 JPS6236609B2 JP56015406A JP1540681A JPS6236609B2 JP S6236609 B2 JPS6236609 B2 JP S6236609B2 JP 56015406 A JP56015406 A JP 56015406A JP 1540681 A JP1540681 A JP 1540681A JP S6236609 B2 JPS6236609 B2 JP S6236609B2
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- protective coating
- resistor
- nonlinear resistor
- glass
- 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
Links
- 239000010410 layer Substances 0.000 claims description 31
- 239000011253 protective coating Substances 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 5
- 239000011147 inorganic material Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
- Details Of Resistors (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Description
この発明は、避雷器、サージアブソーバ用など
に用いられる非直線性抵抗体の耐電圧性あるいは
耐環境性の向上用としての非直線性抵抗体の保護
被覆層の形成方法に関する。
一般に、酸化亜鉛（ZnO）を主材とし、微量の
酸化ビスマス、酸化アンチモン、酸化コバルト、
酸化マンガン、酸化クロムなどの添加物を加え
て、造粒、成形後1200℃〜1300℃の温度で焼成す
ることによつて、非直線抵抗性の極めて優れた抵
抗体が得られる。しかし、この非直線性抵抗体に
電極を形成しただけのものでは避雷器、サージア
ブソーパ用などの素子として使用されることはほ
とんどない。多くの場合は少なくとも第１図に示
すように、衝撃大電流の吸収時における空気放電
による外部閃絡を防止するために、非直線抵抗体
１の側面に絶縁体層３が設けられる。この絶縁体
層のみで不十分な場合には第２図に示すように、
耐電圧性向上のために無機質の粉末材料から保護
被覆層４を電極２と絶縁体層３との間の隔部に形
成されることもある。
この保護被覆層４は、絶縁体層３と同一の目的
以外に、非直線性抵抗体１の表面を化学的および
機械的な損傷から守るために形成する場合も多く
ある。
このような保護被覆層４を無機質の材料で構成
する場合には、無機質材料は粉体状のものを選ぶ
ことが多い。粉体自体には接着力がないので、そ
れを非直線性抵抗体１に接着させるために、従来
その粉体は有機物性バインダと混合され、泥しよ
う状化されていた。この状態の無機質材料が非直
線性抵抗体１の所定部分に塗布され、保護被覆層
４が形成されていた。
しかし、このような工程によつて保護被覆層が
形成された非直線性抵抗体の電気特性は、しばし
ばその特性値が悪化して製品に供することができ
なかつた。
この発明は上記のような従来のものの欠点を除
去するためのなされたもので、無機質の粉末材料
を泥しよう状にする工程において、有機物性バイ
ンダを用いずに、無機物をバインダとして用いる
ことによつて、非直線性抵抗体の電気特性を悪化
させることなく保護被覆層を形成することを目的
とする。
以下、この発明の効果を示すため、無機物のバ
インダとして水を用いた場合について説明する。
無機質の粉末材料として低融点ガラス粉末を選
び、有機物性バインダを用いて泥しよう化したも
のを従来ガラス、無機物をバインダとして用い
て、泥しよう化したものを本発明ガラスとする。
これらの２種類のガラスをそれぞれ同じ大きさの
非直線性抵抗体１に第３図〜第５図に示すように
３種類の形状に塗布した後、バツチ炉にて500℃
１時間同時に熱処理を行つて、保護被覆層４を形
成した。この非直線性抵抗体１に10μＡの電流を
流した時の両電極２間の電圧を、保護被覆層４を
形成する前後で測定して表１のデータを得られ
た。
従来ガラスを用いて保護被覆層４を形成した場
合、表１のケース（第４図の場合）のみが非直
線性抵抗体１の電気特性が悪化してない。ガラス
塗布中、あるいはその後の熱処理中に非直線性抵
抗体１の上部に塗布されたガラスの一部が垂れ
て、下部のガラス部と連結したようなケース
（第５図の場合）は、起こり得るが、そうすれば
非直線性抵抗体１の電気特性は容易に非常に悪化
することもわかる。
The present invention relates to a method for forming a protective coating layer of a non-linear resistor used for lightning arresters, surge absorbers, etc. to improve voltage resistance or environmental resistance of the non-linear resistor. Generally, the main material is zinc oxide (ZnO), with trace amounts of bismuth oxide, antimony oxide, cobalt oxide,
By adding additives such as manganese oxide and chromium oxide, granulating and molding, and firing at a temperature of 1200°C to 1300°C, a resistor with extremely excellent nonlinear resistance can be obtained. However, this nonlinear resistor with electrodes formed thereon is rarely used as an element for lightning arresters, surge absorbers, etc. In many cases, at least as shown in FIG. 1, an insulating layer 3 is provided on the side surface of the non-linear resistor 1 in order to prevent external flashover due to air discharge when absorbing a large impulse current. If this insulating layer alone is insufficient, as shown in Figure 2,
In order to improve voltage resistance, a protective coating layer 4 made of an inorganic powder material may be formed in the space between the electrode 2 and the insulator layer 3. In addition to the same purpose as the insulator layer 3, the protective coating layer 4 is often formed to protect the surface of the nonlinear resistor 1 from chemical and mechanical damage. When the protective coating layer 4 is made of an inorganic material, the inorganic material is often in the form of powder. Since the powder itself does not have adhesive strength, in order to adhere it to the nonlinear resistor 1, the powder has conventionally been mixed with an organic binder to form a slurry. The inorganic material in this state was applied to a predetermined portion of the nonlinear resistor 1 to form a protective coating layer 4. However, the electrical characteristics of a nonlinear resistor on which a protective coating layer is formed by such a process often deteriorate, and the resistor cannot be used as a product. This invention was made in order to eliminate the drawbacks of the conventional products as described above.In the process of turning an inorganic powder material into a slurry-like form, this invention uses an inorganic material as a binder instead of an organic binder. Therefore, it is an object of the present invention to form a protective coating layer without deteriorating the electrical characteristics of a nonlinear resistor. In order to demonstrate the effects of the present invention, a case will be described below in which water is used as an inorganic binder. A glass powder with a low melting point is selected as an inorganic powder material, and a material made of sulfuric acid using an organic binder is used as a conventional glass, and a glass powder made of sulfuric acid using an inorganic material as a binder is used as the glass of the present invention.
After applying these two types of glass to the nonlinear resistor 1 of the same size in three different shapes as shown in Figures 3 to 5, the glass was heated to 500°C in a batch furnace.
A heat treatment was simultaneously performed for 1 hour to form a protective coating layer 4. When a current of 10 μA was passed through this nonlinear resistor 1, the voltage between both electrodes 2 was measured before and after forming the protective coating layer 4, and the data shown in Table 1 was obtained. When the protective coating layer 4 was formed using conventional glass, only the case shown in Table 1 (the case shown in FIG. 4) did not deteriorate the electrical characteristics of the nonlinear resistor 1. A case where a part of the glass applied to the upper part of the non-linear resistor 1 sags during glass application or subsequent heat treatment and connects with the lower glass part (the case shown in Fig. 5) may occur. However, it can be seen that if this is done, the electrical characteristics of the nonlinear resistor 1 will easily deteriorate significantly.
【表】
これに対し本発明によるガラスでは、表１のケ
ース（第３図の場合）より非直線性抵抗体１の
任意の部分に、あるいは全部に保護被覆層４を形
成しても、非直線性抵抗体の電気特性を悪化する
ことはないことがわかる。このことから、本発明
によるガラスを用いて保護被覆層４を形成するこ
とによつて、非直線性抵抗体の耐電圧性、耐環境
性を著しく向上させることが可能である。
本発明ガラスによつて電気特性の悪化を起こす
ことなく、保護被覆層４を形成できたが、この原
因を解明するために保護被覆層４、側面絶縁体層
３および非直線性抵抗体１の構成元素について、
それらの境界部を中心として、元素の反応をＸ線
マイクロアナライザによつて調査した。しかし、
従来ガラス品と本発明品のものとに差を見出すこ
とはできなかつた。
一つの可能性として、従来ガラスは、バインダ
に有機物を用いているため、その有機物が保護被
覆層４を形成する熱処理によつて分解し、その過
程で生成するカーボンなどによつて、非直線性抵
抗体１が悪影響をを受けたためと考えられる。
従つて、上記実施例では、バツチ炉中は空気雰
囲気としたが、酸素分圧を大きめにした雰囲気に
することは、有機物が分解して生成するカーボン
を早く安定な二酸化炭素などにできるので、本発
明の効果を一層大きくできる。
また、非直線性抵抗体１を避雷器、サージアブ
ソーバなどの装置に組み込む際、非直線性抵抗体
１を機械的に補強するなどのため、補強材として
金属、セラミツク、および絶縁物などによつて、
その周辺部が固められる場合にも、本発明は、非
直線性抵抗体の電気特性を悪化させることのない
補強材と非直線性抵抗体を一体化する結合材にも
適用できる。
以上のように、この発明によれば、非直線性抵
抗体の電気特性を悪化させることなく、非直線性
抵抗体の任意の部分あるいは全部に、耐電圧性お
よび耐環境性を向上させた保護被覆層が形成でき
る。[Table] On the other hand, in the case of the glass according to the present invention, even if the protective coating layer 4 is formed on any part or all of the nonlinear resistor 1 than in the case of Table 1 (the case of FIG. 3), there is no It can be seen that the electrical characteristics of the linear resistor are not deteriorated. From this, by forming the protective coating layer 4 using the glass according to the present invention, it is possible to significantly improve the voltage resistance and environmental resistance of the nonlinear resistor. The protective coating layer 4 was able to be formed using the glass of the present invention without causing deterioration of the electrical characteristics, but in order to elucidate the cause of this, the protective coating layer 4, the side insulator layer 3 and the non-linear resistor 1 were Regarding the constituent elements,
The reactions of the elements were investigated using an X-ray microanalyzer, focusing on the boundaries between them. but,
No difference could be found between the conventional glass product and the product of the present invention. One possibility is that conventional glass uses an organic substance as a binder, so the organic substance decomposes during the heat treatment to form the protective coating layer 4, and carbon generated in the process causes non-linearity. This is thought to be because the resistor 1 was adversely affected. Therefore, in the above example, an air atmosphere was used in the batch furnace, but by creating an atmosphere with a higher oxygen partial pressure, carbon generated by decomposition of organic matter can be quickly converted into stable carbon dioxide, etc. The effects of the present invention can be further enhanced. In addition, when incorporating the nonlinear resistor 1 into devices such as lightning arresters and surge absorbers, metal, ceramic, or insulating material may be used as a reinforcing material to mechanically reinforce the nonlinear resistor 1. ,
Even when the peripheral portion thereof is hardened, the present invention can also be applied to a bonding material that integrates the reinforcing material and the non-linear resistor without degrading the electrical characteristics of the non-linear resistor. As described above, according to the present invention, any part or the entire nonlinear resistor is protected with improved voltage resistance and environmental resistance without deteriorating the electrical characteristics of the nonlinear resistor. A covering layer can be formed.
第１図は電極と側面絶縁層を有する非直線抵抗
体の断面図、第２図は第１図の非直線抵抗体の電
極部と側面絶縁層以外に保護被覆層を形成したも
のの断面図、第３図〜第５図はガラス塗布状態を
示し、いづれもＡは斜視図Ｂは断面図で、第３図
はケースの塗布状態、第４図はケースの塗布
状態、第５図はケースの塗布状態である。なお
図中同一符号は同一もしくは相当部分を示す。
図中、１は非直線抵抗体、２は電極、３は側面
絶縁層、４は保護被覆層である。
FIG. 1 is a cross-sectional view of a non-linear resistor having an electrode and a side insulating layer, and FIG. 2 is a cross-sectional view of the non-linear resistor shown in FIG. 1 with a protective coating layer formed in addition to the electrode portion and side insulating layer. Figures 3 to 5 show the state of glass application, where A is a perspective view and B is a cross-sectional view. It is in a coated state. Note that the same reference numerals in the figures indicate the same or equivalent parts. In the figure, 1 is a non-linear resistor, 2 is an electrode, 3 is a side insulating layer, and 4 is a protective coating layer.
Claims (1)
の保護被覆層を形成する方法において、上記保護
被覆層は無機質の粉末材料を無機物のバインダで
泥しよう化して上記非直線性抵抗体に付着させ、
熱処理を行なつて形成することを特徴とする非直
線性抵抗体の保護被覆層の形成方法。 ２ 粉末材料として低融点ガラスを、バインダと
して水を使用したことを特徴とする特許請求の範
囲第１項記載の非直線性抵抗体の保護被覆層の形
成方法。[Claims] 1. In a method for forming a protective coating layer for preventing external flash over a predetermined portion of a non-linear resistor, the protective coating layer is formed by slurrying an inorganic powder material with an inorganic binder. Attach it to a nonlinear resistor,
A method for forming a protective coating layer for a nonlinear resistor, the method comprising forming a protective coating layer by heat treatment. 2. A method for forming a protective coating layer for a nonlinear resistor according to claim 1, characterized in that low melting point glass is used as the powder material and water is used as the binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56015406A JPS57128904A (en) | 1981-02-03 | 1981-02-03 | Method of forming protective film layer for nonlinear resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56015406A JPS57128904A (en) | 1981-02-03 | 1981-02-03 | Method of forming protective film layer for nonlinear resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57128904A JPS57128904A (en) | 1982-08-10 |
| JPS6236609B2 true JPS6236609B2 (en) | 1987-08-07 |
Family
ID=11887843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56015406A Granted JPS57128904A (en) | 1981-02-03 | 1981-02-03 | Method of forming protective film layer for nonlinear resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57128904A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01227401A (en) * | 1988-03-08 | 1989-09-11 | Ngk Insulators Ltd | Non-linear voltage-dependent resistor |
| US5733393A (en) * | 1996-01-17 | 1998-03-31 | The Goodyear Tire & Rubber Company | Tire having good diverse properties |
| JP2000235905A (en) * | 1999-02-15 | 2000-08-29 | Meidensha Corp | Manufacture of nonlinear resistor |
| JP4048634B2 (en) * | 1999-02-18 | 2008-02-20 | 株式会社明電舎 | Method for manufacturing non-linear resistor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5217072U (en) * | 1975-07-19 | 1977-02-07 | ||
| JPS5527668A (en) * | 1978-08-18 | 1980-02-27 | Mitsubishi Electric Corp | Method of forming external flash over preventive insulator layer of nonlinear resistor |
-
1981
- 1981-02-03 JP JP56015406A patent/JPS57128904A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5217072U (en) * | 1975-07-19 | 1977-02-07 | ||
| JPS5527668A (en) * | 1978-08-18 | 1980-02-27 | Mitsubishi Electric Corp | Method of forming external flash over preventive insulator layer of nonlinear resistor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57128904A (en) | 1982-08-10 |
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