JP3156033U

JP3156033U - Surge absorber

Info

Publication number: JP3156033U
Application number: JP2009006924U
Authority: JP
Inventors: 孝一今井; 伸木原
Original assignee: Okaya Electric Industry Co Ltd
Current assignee: Okaya Electric Industry Co Ltd
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2009-12-10
Anticipated expiration: 2019-09-30

Abstract

【課題】アルゴンと六フッ化硫黄の混合ガスを併入することで、耐電圧特性及びインパルス応答性を高めたサージ吸収素子を提供する。【解決手段】放電間隙００５を隔てて対向配置した一対の放電電極００３，００３と、各放電電極００３，００３と微小放電間隙015を隔てて対向配置した導電性被膜０１２を備えたトリガ放電部材００４とを、放電ガスと共に気密外囲器００２内に封入して成るサージ吸収素子００１であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成した。上記アルゴンの混合割合は１０〜９９．９体積％、六フッ化硫黄の混合割合は９０〜０．１体積％と成される。【選択図】図１Provided is a surge absorbing element with improved withstand voltage characteristics and impulse response by incorporating a mixed gas of argon and sulfur hexafluoride. A trigger discharge member 004 having a pair of discharge electrodes 003 and 003 arranged opposite to each other with a discharge gap 005 and a conductive film 012 arranged opposite to each discharge electrode 003 and 003 with a minute discharge gap 015 interposed therebetween. Is a surge absorbing element 001 sealed in a hermetic envelope 002 together with a discharge gas, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride. The mixing ratio of argon is 10 to 99.9% by volume, and the mixing ratio of sulfur hexafluoride is 90 to 0.1% by volume. [Selection] Figure 1

Description

この考案は、気密外囲器内に封入した複数の放電電極間の放電間隙における放電現象を利用して誘導雷等のサージを吸収することにより、電子機器が損傷することを防止するサージ吸収素子に関する。 This device is a surge absorption element that prevents damage to electronic equipment by absorbing surges such as induced lightning using a discharge phenomenon in a discharge gap between a plurality of discharge electrodes enclosed in an airtight envelope. About.

この種のサージ吸収素子に好適に使用できる放電管として、本出願人は、先に実用新案登録第３１３０５６８号を提案した。
この放電管60は、図２０に示すように、両端が開口した絶縁材よりなる円筒状のケース部材62の両端開口部を、放電電極を兼ねた一対の蓋部材64，64で気密に封止することによって気密外囲器66を形成してなる。 As a discharge tube that can be suitably used for this type of surge absorbing element, the present applicant has previously proposed Utility Model Registration No. 3130568.
As shown in FIG. 20, the discharge tube 60 is hermetically sealed with a pair of lid members 64, 64 that also serve as discharge electrodes, at both ends of a cylindrical case member 62 made of an insulating material that opens at both ends. By doing so, an airtight envelope 66 is formed.

上記蓋部材64は、気密外囲器66の中心に向けて大きく突き出た平面状の放電電極部68と、ケース部材62の端面に接する接合部70を備えており、両蓋部材64，64の放電電極部68，68間には、所定の放電間隙72が形成されている。
また、上記ケース部材62の内壁面74には、その両端が、放電電極を兼ねた上記蓋部材64，64と微小放電間隙76を隔てて対向配置された線状のトリガ放電膜78が複数形成されている。 The lid member 64 includes a flat discharge electrode portion 68 that protrudes greatly toward the center of the hermetic envelope 66, and a joint portion 70 that contacts the end surface of the case member 62. A predetermined discharge gap 72 is formed between the discharge electrode portions 68 and 68.
Further, a plurality of linear trigger discharge films 78 are formed on the inner wall surface 74 of the case member 62 so that both ends thereof are opposed to the lid members 64 and 64 that also serve as discharge electrodes with a minute discharge gap 76 therebetween. Has been.

上記放電電極部68の表面には、電子放出特性が良好な物質を含有した被膜80が形成されている。
また、上記気密外囲器66内には、ネオン（Ｎｅ）とアルゴン（Ａｒ）、窒素（Ｎ_２）の単体又は混合ガスと、水素（Ｈ_２）とを混合させたガス中に、クリプトン（Ｋｒ）を混合して構成した放電ガスが封入されている。 On the surface of the discharge electrode portion 68, a film 80 containing a substance having good electron emission characteristics is formed.
In the hermetic envelope 66, krypton (N ₂ ), argon (Ar), nitrogen (N ₂ ) alone or a mixed gas, and hydrogen (H ₂ ) are mixed in a gas. A discharge gas constituted by mixing Kr) is enclosed.

上記構成を備えた放電管60がサージ吸収素子として使用された場合、放電電極を兼ねた上記蓋部材64，64を介してサージが印加されると、トリガ放電膜78の両端と蓋部材64，64間の微小放電間隙76に電界が集中し、これにより微小放電間隙76に電子が放出されてトリガ放電としての沿面コロナ放電が発生する。次いで、この沿面コロナ放電は、電子のプライミング効果によってグロー放電へと移行する。そして、このグロー放電が放電電極部68，68間の放電間隙72へと転移し、主放電としてのアーク放電に移行してサージの吸収が行われるのである。
実用新案登録第３１３０５６８号公報 When the discharge tube 60 having the above configuration is used as a surge absorbing element, when a surge is applied through the lid members 64, 64 that also serve as discharge electrodes, both ends of the trigger discharge film 78 and the lid members 64, The electric field concentrates in the minute discharge gaps 76 between the 64, whereby electrons are emitted into the minute discharge gaps 76, and creeping corona discharge as a trigger discharge is generated. Next, this creeping corona discharge shifts to glow discharge due to an electron priming effect. Then, the glow discharge is transferred to the discharge gap 72 between the discharge electrode portions 68 and 68, and is transferred to arc discharge as the main discharge to absorb the surge.
Utility Model Registration No. 3130568

ところで、上記放電管60が高電圧型のサージ吸収素子として使用される場合、上記放電ガスに代えて、窒素（Ｎ_２）と六フッ化硫黄（ＳＦ_６）の混合ガスが良く用いられている。すなわち負性気体である六フッ化硫黄ガスは高絶縁耐力を有しており、安価な窒素ガスと六フッ化硫黄ガスの混合ガスで放電ガスを構成することにより、低コスト且つ耐電圧特性に優れたサージ吸収素子を得られるのである。 By the way, when the discharge tube 60 is used as a high voltage type surge absorbing element, a mixed gas of nitrogen (N ₂ ) and sulfur hexafluoride (SF ₆ ) is often used instead of the discharge gas. . That is, sulfur hexafluoride gas, which is a negative gas, has a high dielectric strength, and the discharge gas is composed of an inexpensive mixed gas of nitrogen gas and sulfur hexafluoride gas, thereby reducing the cost and withstand voltage characteristics. An excellent surge absorbing element can be obtained.

しかしながら、放電ガスを窒素と六フッ化硫黄の混合ガスで構成した場合、放電時の衝撃で放電電極部68や被膜80がスパッタされ易く、その結果、インパルス（サージ）電流が印加された際の応答性（以下、インパルス応答性）が不良となる事態を生じていた。 However, when the discharge gas is composed of a mixed gas of nitrogen and sulfur hexafluoride, the discharge electrode portion 68 and the film 80 are easily sputtered by the impact during discharge, and as a result, when an impulse (surge) current is applied. There has been a situation in which the responsiveness (hereinafter referred to as impulse responsiveness) becomes poor.

この考案は、従来の上記問題に鑑みてなされたものであり、その目的とするところは、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することにある。 The present invention has been made in view of the above-described conventional problems, and an object thereof is to realize a surge absorbing element having excellent withstand voltage characteristics and impulse response.

上記目的を達成するため、本考案の請求項１に記載のサージ吸収素子は、
複数の放電電極を放電間隙を隔てて配置すると共に、これを放電ガスと共に気密外囲器内に封入してなるサージ吸収素子であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成したことを特徴とする。 In order to achieve the above object, a surge absorbing element according to claim 1 of the present invention comprises:
A surge absorbing element in which a plurality of discharge electrodes are arranged with a discharge gap and sealed together with a discharge gas in an airtight envelope, and the discharge gas is mixed with argon and sulfur hexafluoride. It is characterized by comprising.

本考案の請求項２に記載のサージ吸収素子は、
放電間隙を隔てて対向配置した複数の放電電極と、各放電電極と微小放電間隙を隔てて対向配置した導電性被膜を備えたトリガ放電部材とを、放電ガスと共に気密外囲器内に封入してなるサージ吸収素子であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成したことを特徴とする。 The surge absorber according to claim 2 of the present invention is
A plurality of discharge electrodes arranged opposite to each other with a discharge gap and a trigger discharge member provided with a conductive coating arranged opposite to each discharge electrode with a minute discharge gap enclosed in a hermetic envelope together with a discharge gas. In the surge absorbing element, the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

本考案の請求項３に記載のサージ吸収素子は、
複数の放電電極を放電間隙を隔てて配置すると共に、これを放電ガスと共に気密外囲器内に封入し、さらに、上記放電電極の表面に電子放出特性が良好な物質を含有した被膜を形成して成るサージ吸収素子であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成したことを特徴とする。 The surge absorber according to claim 3 of the present invention is
A plurality of discharge electrodes are arranged with a discharge gap therebetween, and this is enclosed in a hermetic envelope together with a discharge gas, and further, a film containing a substance having good electron emission characteristics is formed on the surface of the discharge electrode. The above-described discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

本考案の請求項４に記載のサージ吸収素子は、
複数の放電電極を放電間隙を隔てて配置すると共に、これを放電ガスと共に気密外囲器内に封入し、さらに、上記放電電極の表面に、多数の穴部を形成すると共に、上記穴部内面に、電子放出特性が良好な物質を含有した被膜を形成して成るサージ吸収素子であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成したことを特徴とする。 The surge absorber according to claim 4 of the present invention is
A plurality of discharge electrodes are arranged with a discharge gap therebetween, and this is enclosed in a hermetic envelope together with a discharge gas, and a plurality of holes are formed on the surface of the discharge electrode, and the inner surface of the hole And a surge absorbing element formed by forming a film containing a substance having good electron emission characteristics, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

本考案の請求項５に記載のサージ吸収素子は、
円筒状のケース部材の両端開口部を、放電電極を兼ねた一対の蓋部材で気密に封止することによって気密外囲器を形成すると共に、該気密外囲器内に放電ガスを封入し、また、気密外囲器内に配置される上記蓋部材の放電電極部間に放電間隙を形成すると共に、上記ケース部材の内壁面に、その両端が上記蓋部材と微小放電間隙を隔てて配置された複数のトリガ放電膜を形成し、さらに、上記放電電極部の表面に、上記円筒状のケース部材の内壁面と同心の円上に配置される多数の穴部を形成すると共に、上記穴部内面に、電子放出特性が良好な物質を含有した被膜を形成して成るサージ吸収素子であって、上記放電ガスを、アルゴンと六フッ化硫黄の混合ガスで構成したことを特徴とする。 The surge absorbing element according to claim 5 of the present invention is
A hermetic envelope is formed by hermetically sealing both ends of the cylindrical case member with a pair of lid members that also serve as discharge electrodes, and a discharge gas is sealed in the hermetic envelope, In addition, a discharge gap is formed between the discharge electrode portions of the lid member arranged in the hermetic envelope, and both ends of the case member are arranged on the inner wall surface of the case member with a minute discharge gap therebetween. A plurality of trigger discharge films are formed, and a plurality of holes are formed on the surface of the discharge electrode portion on a circle concentric with the inner wall surface of the cylindrical case member. A surge absorbing element comprising an inner surface formed with a film containing a substance having good electron emission characteristics, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

本考案の請求項６に記載のサージ吸収素子は、請求項１乃至請求項５に記載のサージ吸収素子において、
上記アルゴンの混合割合は１０〜９９．９体積％、六フッ化硫黄の混合割合は９０〜０．１体積％であることを特徴とする。 The surge absorber according to claim 6 of the present invention is the surge absorber according to any one of claims 1 to 5,
The mixing ratio of the argon is 10 to 99.9% by volume, and the mixing ratio of sulfur hexafluoride is 90 to 0.1% by volume.

本考案に係る請求項１乃至請求項５に記載のサージ吸収素子は、気密外囲器内に封入する放電ガスをアルゴンと六フッ化硫黄の混合ガスで構成したことにより、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することができる。 The surge absorbing element according to any one of claims 1 to 5 according to the present invention comprises a discharge gas sealed in an airtight envelope made of a mixed gas of argon and sulfur hexafluoride, so that withstand voltage characteristics and impulses are improved. A surge absorbing element with excellent responsiveness can be realized.

また、請求項４に記載のサージ吸収素子にあっては、放電電極部の表面に多数の穴部を形成し、該穴部内面に被膜を形成したことにより、放電電極部と被膜の密着力が向上し、放電時の衝撃による被膜のスパッタを抑制する効果を奏する。 Further, in the surge absorbing element according to claim 4, by forming a large number of holes on the surface of the discharge electrode part and forming a film on the inner surface of the hole part, adhesion between the discharge electrode part and the film is achieved. And the effect of suppressing the spattering of the coating film due to the impact during discharge is achieved.

尚、放電時の衝撃で被膜はスパッタされやすく、スパッタで飛散した被膜の構成材料（以下、スパッタ飛散物と称する）がケース部材の内壁面やトリガ放電膜に付着・堆積することが、放電開始電圧の不安定化をもたらす原因であり、特に、スパッタ飛散物の堆積量が、ケース部材の内壁面やトリガ放電膜の箇所毎にバラバラであることが、放電開始電圧の不安定化を促進する大きな要因となっている。
本考案に係る請求項５に記載のサージ吸収素子にあっては、被膜が形成される多数の穴部を、円筒状のケース部材の内壁面と同心の円上に配置形成したので、同一の円上に配置された各穴部とケース部材の内壁面との距離は全て同一となる。
このため、ケース部材の内壁面の特定の箇所及び特定のトリガ放電膜において、スパッタ飛散物の堆積量に多少の差が生じることを抑制でき、ケース部材の内壁面及びトリガ放電膜へのスパッタ飛散物の堆積量が平準化されるので、放電開始電圧の安定化を実現できる。 The coating is easily sputtered by the impact at the time of discharge, and the constituent material of the coating (hereinafter referred to as spatter scattered) deposited by sputtering adheres to and accumulates on the inner wall surface of the case member and the trigger discharge film. This is a cause of voltage instability, and in particular, the amount of spatter scattered is different for each part of the inner wall surface of the case member and the trigger discharge film, which promotes instability of the discharge start voltage. It is a big factor.
In the surge absorbing element according to claim 5 according to the present invention, a large number of holes in which the coating is formed are arranged and formed on a circle concentric with the inner wall surface of the cylindrical case member. All the distances between the holes arranged on the circle and the inner wall surface of the case member are the same.
For this reason, it is possible to suppress the occurrence of a slight difference in the amount of spatter scattered on a specific portion of the inner wall surface of the case member and a specific trigger discharge film, and the spatter scattering on the inner wall surface of the case member and the trigger discharge film. Since the accumulation amount of the material is leveled, the discharge start voltage can be stabilized.

図１〜図３に示す本考案に係る第１のサージ吸収素子001は、ガラスより成る気密外囲器002内に、細長い丸棒状の一対の放電電極003，003と、絶縁性材料であるフォルステライト、アルミナ、ステアタイト等のセラミックより成るトリガ放電部材004を封入して成る。
上記一対の放電電極003，003は、所定の距離を隔てて平行配置されており、両放電電極003，003間に放電間隙005が形成されている。また、上記放電電極003，003の下端部には、デュメット線（銅被覆鉄ニッケル合金線）や４２−６合金線等より成るリード端子006，006の一端が接続されており、上記リード端子006，006の他端は、上記気密外囲器002の封止部007を貫通して外部に導出されている。 A first surge absorbing element 001 according to the present invention shown in FIGS. 1 to 3 includes a pair of elongated round bar-like discharge electrodes 003, 003 and a insulating material formed in a hermetic envelope 002 made of glass. A trigger discharge member 004 made of ceramic such as stellite, alumina, steatite is enclosed.
The pair of discharge electrodes 003 and 003 are arranged in parallel at a predetermined distance, and a discharge gap 005 is formed between the discharge electrodes 003 and 003. The lower ends of the discharge electrodes 003 and 003 are connected to one ends of lead terminals 006 and 006 made of dumet wire (copper-coated iron-nickel alloy wire), 42-6 alloy wire, or the like. , 006 penetrates the sealing portion 007 of the hermetic envelope 002 and is led out to the outside.

上記放電電極003は、導電性に優れたニッケル等の金属や、ニッケル−マンガン（Ｎｉ−Ｍｎ）合金等の耐酸化性に優れたニッケル合金で構成されている。
また、上記放電電極003の表面には、電子放出特性が良好な物質を含有した被膜009が形成されている。
電子放出特性が良好な物質を含有した上記被膜009は、例えば、臭化セシウム（ＣｓＢｒ）が含有された被膜009で形成することができる。この被膜009は、臭化セシウムの粉末を、珪酸ナトリウム溶液と純水よりなるバインダーに添加したものを、放電電極003表面に塗布することによって形成することができる。
この場合、臭化セシウムが０．０１〜７０重量％、バインダーが９９．９９〜３０重量％の配合割合で混合される。
また、バインダー中の珪酸ナトリウム溶液と純水との配合割合は、珪酸ナトリウム溶液が０．０１〜７０重量％、純水が９９．９９〜３０重量％の配合割合で混合される。 The discharge electrode 003 is made of a metal such as nickel having excellent conductivity or a nickel alloy having excellent oxidation resistance such as a nickel-manganese (Ni-Mn) alloy.
Further, a coating film 009 containing a substance having good electron emission characteristics is formed on the surface of the discharge electrode 003.
The film 009 containing a substance having good electron emission characteristics can be formed of, for example, a film 009 containing cesium bromide (CsBr). The coating 009 can be formed by applying a powder of cesium bromide added to a binder composed of a sodium silicate solution and pure water to the surface of the discharge electrode 003.
In this case, cesium bromide is mixed at a blending ratio of 0.01 to 70% by weight and binder is 99.99 to 30% by weight.
The blending ratio of the sodium silicate solution and pure water in the binder is such that the sodium silicate solution is 0.01 to 70% by weight and the pure water is 99.99 to 30% by weight.

上記トリガ放電部材004は、気密容器002の封止部007上に配置されており、図２及び図３に拡大して示すように、略楕円盤状の本体部010と、該本体部010を上下に貫通する一対の孔011，011を有している。
上記孔011，011は、上記放電電極003の外形寸法と略同径と成されており、孔011，011内に、放電電極003，003とリード端子006，006が挿通されている。 The trigger discharge member 004 is disposed on the sealing portion 007 of the airtight container 002. As shown in enlarged views in FIG. 2 and FIG. It has a pair of holes 011 and 011 penetrating vertically.
The holes 011 and 011 have substantially the same diameter as the outer dimensions of the discharge electrode 003, and the discharge electrodes 003 and 003 and the lead terminals 006 and 006 are inserted into the holes 011 and 011.

上記トリガ放電部材004の一対の孔011，011間には、本体部010表面から所定の高さ（例えば、約１mmの高さ）で突出し、その表面にカーボン系材料等より成る導電性被膜012が被着された凸部013が形成されており、該凸部013の両端縁の一部は、図３に示すように、微小放電間隙015を隔てて、孔011，011内に挿入された放電電極003，003の内方側の外面略半周に沿って配置されている。そして、凸部013表面の導電性被膜012と、各放電電極003，003とが、放電電極003，003の内方側の外面の略半周に亘って、上記微小放電間隙015を隔てて対向配置されている。尚、上記微小放電間隙015は、例えば１０〜５０μｍの範囲に設定される。 A space between the pair of holes 011 and 011 of the trigger discharge member 004 protrudes from the surface of the main body 010 at a predetermined height (for example, a height of about 1 mm), and the conductive coating 012 made of a carbon-based material or the like on the surface. Is formed, and a part of both end edges of the convex portion 013 is inserted into the holes 011 and 011 with a minute discharge gap 015 therebetween as shown in FIG. The discharge electrodes 003 and 003 are arranged along substantially the outer circumference on the inner side. Then, the conductive coating 012 on the surface of the convex portion 013 and the discharge electrodes 003 and 003 are opposed to each other across the micro discharge gap 015 over the almost half of the outer surface on the inner side of the discharge electrodes 003 and 003. Has been. The minute discharge gap 015 is set in a range of 10 to 50 μm, for example.

上記気密外囲器002内には、アルゴン（Ａｒ）と六フッ化硫黄（ＳＦ_６）の混合ガスより成る放電ガスが封入されている。
尚、混合ガス中のアルゴンの混合割合は１０〜９９．９体積％、六フッ化硫黄の混合割合は９０〜０．１体積％と成すのが、耐電圧特性及びインパルス応答性に優れたサージ吸収素子001を実現する観点から好ましい。
而して、負性気体である六フッ化硫黄ガスは高絶縁耐力を有していることから、放電ガス中に六フッ化硫黄ガスを混入することにより、第１のサージ吸収素子001の耐電圧特性が向上する。 The hermetic envelope 002 is filled with a discharge gas composed of a mixed gas of argon (Ar) and sulfur hexafluoride (SF ₆ ).
In addition, the mixing ratio of argon in the mixed gas is 10 to 99.9% by volume, and the mixing ratio of sulfur hexafluoride is 90 to 0.1% by volume, which is a surge excellent in withstand voltage characteristics and impulse response. It is preferable from the viewpoint of realizing the absorption element 001.
Thus, since sulfur hexafluoride gas, which is a negative gas, has a high dielectric strength, by mixing sulfur hexafluoride gas into the discharge gas, the resistance of the first surge absorbing element 001 is improved. Voltage characteristics are improved.

上記構成を備えた第１のサージ吸収素子001に、リード端子006，006を介してサージが印加されると、導電性被膜012と各放電電極003，003間の微小放電間隙015に電界が集中し、これにより微小放電間隙015に電子が放出されてトリガ放電が発生する。次いで、このトリガ放電は、電子のプライミング効果によってグロー放電へと移行する。そして、このグロー放電がサージ電流の増加によって放電間隙005へと転移し、さらに主放電としてのアーク放電に移行してサージの吸収が行われるのである。
上記の通り、第１のサージ吸収素子001にあっては、各放電電極003，003と導電性被膜012とが、放電電極003，003の内方側の外面の略半周に亘って対向配置されているので、上記微小放電間隙015におけるトリガ放電を広い範囲に亘って生成することができる。 When a surge is applied to the first surge absorbing element 001 having the above configuration through the lead terminals 006 and 006, the electric field is concentrated in the minute discharge gap 015 between the conductive film 012 and the discharge electrodes 003 and 003. As a result, electrons are emitted into the minute discharge gap 015 to generate a trigger discharge. Next, this trigger discharge shifts to glow discharge due to the priming effect of electrons. The glow discharge is transferred to the discharge gap 005 due to the increase of the surge current, and further shifts to the arc discharge as the main discharge to absorb the surge.
As described above, in the first surge absorbing element 001, the discharge electrodes 003 and 003 and the conductive coating 012 are arranged to face each other over substantially half of the outer surface on the inner side of the discharge electrodes 003 and 003. Therefore, the trigger discharge in the minute discharge gap 015 can be generated over a wide range.

而して、本考案の第１のサージ吸収素子001にあっては、気密外囲器002内に封入する放電ガスをアルゴンと六フッ化硫黄の混合ガスで構成したことにより、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することができる。 Thus, in the first surge absorbing element 001 of the present invention, the discharge gas sealed in the hermetic envelope 002 is composed of a mixed gas of argon and sulfur hexafluoride, so that withstand voltage characteristics and A surge absorber having excellent impulse response can be realized.

図４は、気密外囲器002内にアルゴン５０体積％と六フッ化硫黄５０体積％の混合ガスより成る放電ガスを封入した本考案に係る第１のサージ吸収素子001のＡＣ耐電圧試験のＦａｉｌ電圧の分布を示すヒストグラム、図５は、アルゴンと六フッ化硫黄の混合ガスに代えて、窒素と六フッ化硫黄の混合ガスより成る放電ガスを気密外囲器002内に封入した比較例のサージ吸収素子のＡＣ耐電圧試験のＦａｉｌ電圧の分布を示すヒストグラムである。
而して、気密外囲器002内にアルゴンと六フッ化硫黄の混合ガスより成る放電ガスを封入した本考案に係る第１のサージ吸収素子001（図４）の方が、窒素と六フッ化硫黄の混合ガスより成る放電ガスを封入した比較例のサージ吸収素子（図５）に比べて、Ｆａｉｌ電圧が高く分布しており、平均のＦａｉｌ電圧においても、本考案に係る第１のサージ吸収素子001が３５２５Ｖであるのに対し、比較例のサージ吸収素子は３４５５Ｖであり、本考案に係る第１のサージ吸収素子001の方が耐電圧特性の優れていることが判る。 FIG. 4 shows the AC withstand voltage test of the first surge absorbing element 001 according to the present invention in which a discharge gas composed of a mixed gas of 50 vol% argon and 50 vol% sulfur hexafluoride is sealed in the hermetic envelope 002. FIG. 5 is a comparative example in which a discharge gas composed of a mixed gas of nitrogen and sulfur hexafluoride is sealed in an airtight envelope 002 instead of a mixed gas of argon and sulfur hexafluoride. It is a histogram which shows distribution of the Fail voltage of the AC withstanding voltage test of the surge absorption element.
Thus, the first surge absorbing element 001 (FIG. 4) according to the present invention in which a discharge gas composed of a mixed gas of argon and sulfur hexafluoride is sealed in the hermetic envelope 002 is more suitable for nitrogen and hexafluoride. Compared with the surge absorbing element of the comparative example (FIG. 5) in which the discharge gas composed of the sulfurized gas mixture is enclosed, the Fail voltage is distributed higher, and the first surge according to the present invention is also obtained at the average Fail voltage. While the absorbing element 001 is 3525V, the surge absorbing element of the comparative example is 3455V, and it can be seen that the first surge absorbing element 001 according to the present invention has better withstand voltage characteristics.

また、図６は、気密外囲器002内にアルゴン５０体積％と六フッ化硫黄５０体積％の混合ガスより成る放電ガスを封入した本考案に係る第１のサージ吸収素子001のインパルス放電開始電圧の分布を示すヒストグラム、図７は、アルゴンと六フッ化硫黄の混合ガスに代えて、窒素と六フッ化硫黄の混合ガスより成る放電ガスを気密外囲器002内に封入した比較例のサージ吸収素子のインパルス放電開始電圧の分布を示すヒストグラムである。
而して、気密外囲器002内にアルゴンと六フッ化硫黄の混合ガスより成る放電ガスを封入した本考案に係る第１のサージ吸収素子001（図６）の方が、窒素と六フッ化硫黄の混合ガスより成る放電ガスを封入した比較例のサージ吸収素子（図７）に比べて、インパルス放電開始電圧が低く分布しており、平均のインパルス放電開始電圧においても、本考案に係る第１のサージ吸収素子001が６．４０ｋＶであるのに対し、比較例のサージ吸収素子は７．００ｋＶであり、本考案に係る第１のサージ吸収素子001の方がインパルス応答性の優れていることが判る。 FIG. 6 shows the start of impulse discharge of the first surge absorbing element 001 according to the present invention in which a discharge gas composed of a mixed gas of 50 vol% argon and 50 vol% sulfur hexafluoride is sealed in the hermetic envelope 002. FIG. 7 is a histogram showing the voltage distribution. FIG. 7 shows a comparative example in which a discharge gas composed of a mixed gas of nitrogen and sulfur hexafluoride is enclosed in an airtight envelope 002 instead of a mixed gas of argon and sulfur hexafluoride. It is a histogram which shows distribution of the impulse discharge start voltage of a surge absorption element.
Thus, the first surge absorbing element 001 (FIG. 6) according to the present invention in which a discharge gas composed of a mixed gas of argon and sulfur hexafluoride is sealed in the hermetic envelope 002 is more suitable for nitrogen and hexafluoride. Compared to the surge absorbing element of the comparative example (FIG. 7) in which a discharge gas composed of a sulfurized gas mixture is enclosed, the impulse discharge start voltage is distributed lower, and the average impulse discharge start voltage is also related to the present invention. While the first surge absorbing element 001 is 6.40 kV, the surge absorbing element of the comparative example is 7.00 kV, and the first surge absorbing element 001 according to the present invention has better impulse response. I know that.

図８及び図９に示す本考案に係る第２のサージ吸収素子10は、両端が開口した絶縁材としてのセラミックよりなる円筒状のケース部材12の両端開口部を、放電電極を兼ねた一対の蓋部材14，14で気密に封止することによって気密外囲器16を形成してなる。 The second surge absorbing element 10 according to the present invention shown in FIGS. 8 and 9 has a pair of openings at both ends of a cylindrical case member 12 made of ceramic as an insulating material having openings at both ends. The hermetic envelope 16 is formed by hermetically sealing with the lid members 14 and 14.

上記蓋部材14は、気密外囲器16の中心に向けて大きく突き出た略円柱状の放電電極部18と、ケース部材12の端面に接する接合部20を備えており、両蓋部材14，14の放電電極部18，18間には、所定の放電間隙22が形成されている。
放電電極部18と接合部20を備えた上記蓋部材14は、無酸素銅や、無酸素銅にジルコニウム（Ｚｒ）を含有させたジルコニウム銅で構成されている。尚、ケース部材12の端面と蓋部材14の接合部20とは、銀ろう等のシール材（図示せず）を介して気密封止されている。 The lid member 14 includes a substantially cylindrical discharge electrode portion 18 projecting greatly toward the center of the hermetic envelope 16, and a joint portion 20 in contact with the end surface of the case member 12, and both lid members 14, 14 A predetermined discharge gap 22 is formed between the discharge electrode portions 18 and 18.
The lid member 14 provided with the discharge electrode portion 18 and the joint portion 20 is made of oxygen-free copper or zirconium copper containing oxygen-free copper containing zirconium (Zr). Note that the end face of the case member 12 and the joint portion 20 of the lid member 14 are hermetically sealed through a sealing material (not shown) such as silver solder.

また、上記ケース部材12の内壁面24には、その両端が、放電電極を兼ねた上記蓋部材14，14と微小放電間隙26を隔てて配置された線状のトリガ放電膜28が複数形成されている。図１及び図２においては、トリガ放電膜28を、ケース部材12の内壁面24の円周方向に、４５度の等間隔で８本形成した場合が例示されている。
上記トリガ放電膜28は、カーボン系材料等の導電性材料で構成されている。このトリガ放電膜28は、例えば、カーボン系材料より成る芯材を擦り付けることにより形成することができる。 In addition, a plurality of linear trigger discharge films 28 are formed on the inner wall surface 24 of the case member 12 so that both ends of the case member 12 are spaced apart from the lid members 14 and 14 that also serve as discharge electrodes and a minute discharge gap 26. ing. 1 and 2 exemplify a case where eight trigger discharge films 28 are formed at equal intervals of 45 degrees in the circumferential direction of the inner wall surface 24 of the case member 12.
The trigger discharge film 28 is made of a conductive material such as a carbon-based material. The trigger discharge film 28 can be formed, for example, by rubbing a core material made of a carbon-based material.

上記放電電極部18の表面には、電子放出特性が良好な物質を含有した被膜30が形成されている。
電子放出特性が良好な物質を含有した上記被膜30は、例えば、臭化セシウム（ＣｓＢｒ）が含有された被膜30で形成することができる。この被膜30は、臭化セシウムの粉末を、珪酸ナトリウム溶液と純水よりなるバインダーに添加したものを、放電電極部18表面に塗布することによって形成することができる。
この場合、臭化セシウムが０．０１〜７０重量％、バインダーが９９．９９〜３０重量％の配合割合で混合される。
また、バインダー中の珪酸ナトリウム溶液と純水との配合割合は、珪酸ナトリウム溶液が０．０１〜７０重量％、純水が９９．９９〜３０重量％の配合割合で混合される。 On the surface of the discharge electrode portion 18, a coating 30 containing a substance having good electron emission characteristics is formed.
The film 30 containing a substance having good electron emission characteristics can be formed of, for example, a film 30 containing cesium bromide (CsBr). The coating 30 can be formed by applying a powder of cesium bromide added to a binder composed of a sodium silicate solution and pure water to the surface of the discharge electrode portion 18.
In this case, cesium bromide is mixed at a blending ratio of 0.01 to 70% by weight and binder is 99.99 to 30% by weight.
The blending ratio of the sodium silicate solution and pure water in the binder is such that the sodium silicate solution is 0.01 to 70% by weight and the pure water is 99.99 to 30% by weight.

上記気密外囲器16内には、アルゴン（Ａｒ）と六フッ化硫黄（ＳＦ_６）の混合ガスより成る放電ガスが封入されている。
尚、混合ガス中のアルゴンの混合割合は１０〜９９．９体積％、六フッ化硫黄の混合割合は９０〜０．１体積％と成されている。 A discharge gas made of a mixed gas of argon (Ar) and sulfur hexafluoride (SF ₆ ) is enclosed in the hermetic envelope 16.
The mixing ratio of argon in the mixed gas is 10 to 99.9% by volume, and the mixing ratio of sulfur hexafluoride is 90 to 0.1% by volume.

本考案の上記第２のサージ吸収素子10にあっては、放電電極を兼ねた上記蓋部材14，14を介してサージが印加されると、トリガ放電膜28の両端と蓋部材14，14間の微小放電間隙26に電界が集中し、これにより微小放電間隙26に電子が放出されてトリガ放電としての沿面コロナ放電が発生する。次いで、この沿面コロナ放電は、電子のプライミング効果によってグロー放電へと移行する。そして、このグロー放電が放電電極部18，18間の放電間隙22へと転移し、主放電としてのアーク放電に移行してサージの吸収が行われるのである。 In the second surge absorbing element 10 of the present invention, when a surge is applied through the lid members 14 and 14 that also serve as discharge electrodes, the gap between both ends of the trigger discharge film 28 and the lid members 14 and 14 is applied. The electric field concentrates in the small discharge gap 26, and thereby electrons are emitted into the small discharge gap 26 to generate creeping corona discharge as a trigger discharge. Next, this creeping corona discharge shifts to glow discharge due to an electron priming effect. Then, the glow discharge is transferred to the discharge gap 22 between the discharge electrode portions 18 and 18, and the arc discharge as the main discharge is transferred to absorb the surge.

本考案の第２のサージ吸収素子10にあっては、気密外囲器16内に封入する放電ガスをアルゴンと六フッ化硫黄の混合ガスで構成したことにより、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することができる。 In the second surge absorbing element 10 of the present invention, the discharge gas sealed in the hermetic envelope 16 is composed of a mixed gas of argon and sulfur hexafluoride, so that withstand voltage characteristics and impulse response are improved. An excellent surge absorbing element can be realized.

図１０乃至図１３は、本考案に係る第３のサージ吸収素子40を示すものであり、この第３のサージ吸収素子40は、放電電極部18の表面に、略直方体状の多数の穴部29を略マトリクス状に配置形成し、各穴部29内面に、臭化セシウム等の電子放出特性が良好な物質を含有した被膜30を形成した点に特徴を有するものであり、その他の構成は、上記第２のサージ吸収素子10と実質的に同一である。 FIGS. 10 to 13 show a third surge absorbing element 40 according to the present invention. This third surge absorbing element 40 is formed on the surface of the discharge electrode portion 18 with a number of substantially rectangular parallelepiped holes. 29 is arranged in a substantially matrix shape, and a film 30 containing a substance having a good electron emission characteristic such as cesium bromide is formed on the inner surface of each hole 29. The second surge absorbing element 10 is substantially the same.

本考案の上記第３のサージ吸収素子40にあっても、上記第１のサージ吸収素子10と同様に、気密外囲器16内に封入する放電ガスをアルゴンと六フッ化硫黄の混合ガスで構成したことにより、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することができる。
尚、第３のサージ吸収素子40は、放電電極部18の表面に多数の穴部29を形成し、該穴部29内面に上記被膜30を形成したことにより、放電電極部18と被膜30の密着力が向上し、放電時の衝撃による被膜30のスパッタを抑制する効果を奏する。 Even in the third surge absorbing element 40 of the present invention, the discharge gas sealed in the hermetic envelope 16 is a mixed gas of argon and sulfur hexafluoride as in the first surge absorbing element 10. By comprising, the surge absorption element excellent in the withstand voltage characteristic and impulse response property is realizable.
In the third surge absorbing element 40, a large number of holes 29 are formed on the surface of the discharge electrode portion 18, and the coating 30 is formed on the inner surface of the hole 29, whereby the discharge electrode portion 18 and the coating 30 are formed. Adhesion is improved, and there is an effect of suppressing spattering of the coating film 30 due to impact during discharge.

図１４乃至図１７は、本考案に係る第４のサージ吸収素子50を示すものであり、この第４のサージ吸収素子50は、放電電極部18の表面に、略半球状の穴部29を多数形成し、各穴部29内面に、臭化セシウム等の電子放出特性が良好な物質を含有した被膜30を形成した点に特徴を有するものであり、その他の構成は、上記第２のサージ吸収素子10と実質的に同一である。
図１５及び図１７に示すように、上記穴部29は、円筒状のケース部材12の内壁面24と同心の円（以下、同心円と称する）Ｘ，Ｙ上に等間隔で配置形成されている。すなわち、同心円Ｘ上に、３０度の等間隔で１２個の穴部29が形成され、また、同心円Ｙ上に、９０度の等間隔で４個の穴部29が形成されている。また、円筒状のケース部材12の円心の位置にも１個の穴部29が配置形成されている。
尚、図１５及び図１７の同心円Ｘ，Ｙは説明の便宜上示した仮想円である。 FIGS. 14 to 17 show a fourth surge absorbing element 50 according to the present invention. This fourth surge absorbing element 50 has a substantially hemispherical hole 29 on the surface of the discharge electrode portion 18. It is characterized in that a large number of coatings 30 are formed on the inner surface of each hole 29, and a coating 30 containing a material having good electron emission characteristics such as cesium bromide is formed. It is substantially the same as the absorption element 10.
As shown in FIGS. 15 and 17, the holes 29 are formed at equal intervals on circles X and Y concentric with the inner wall surface 24 of the cylindrical case member 12 (hereinafter referred to as concentric circles). . That is, twelve hole portions 29 are formed on the concentric circle X at equal intervals of 30 degrees, and four hole portions 29 are formed on the concentric circle Y at equal intervals of 90 degrees. A single hole 29 is also arranged and formed at the center of the cylindrical case member 12.
The concentric circles X and Y in FIGS. 15 and 17 are virtual circles shown for convenience of explanation.

尚、放電電極部18の表面に形成する穴部29の形状は、上記した「略半球状」に限定されるものではなく、図１８及び図１９の第４のサージ吸収素子50の変形例に示すように、「略直方体状」であっても良い。
もっとも、穴部29を「略半球状」と成した場合の方が、被膜30の状態が安定化し、放電特性のバラツキを低減することができるので好ましい。すなわち、穴部29を「略半球状」と成した場合には、穴部29の全方向から表面張力が均等に掛かり、その結果、被膜30が全方向に均等に形成されるため、被膜30の状態が安定化し、放電特性のバラツキを低減することができるのである。 The shape of the hole 29 formed on the surface of the discharge electrode portion 18 is not limited to the above “substantially hemispherical shape”, but is a modification of the fourth surge absorbing element 50 shown in FIGS. 18 and 19. As shown, it may be “substantially rectangular parallelepiped”.
However, the case where the hole 29 is formed to be “substantially hemispherical” is preferable because the state of the coating 30 can be stabilized and variations in discharge characteristics can be reduced. That is, when the hole portion 29 is formed to be “substantially hemispherical”, the surface tension is uniformly applied from all directions of the hole portion 29, and as a result, the coating film 30 is formed uniformly in all directions. This stabilizes the state and can reduce variations in discharge characteristics.

本考案の上記第４のサージ吸収素子50にあっても、上記第２のサージ吸収素子10と同様に、気密外囲器16内に封入する放電ガスをアルゴンと六フッ化硫黄の混合ガスで構成したことにより、耐電圧特性及びインパルス応答性に優れたサージ吸収素子を実現することができる。 Even in the fourth surge absorbing element 50 of the present invention, the discharge gas sealed in the hermetic envelope 16 is a mixed gas of argon and sulfur hexafluoride as in the second surge absorbing element 10. By comprising, the surge absorption element excellent in the withstand voltage characteristic and impulse response property is realizable.

尚、放電時の衝撃で上記被膜30はスパッタされやすく、スパッタ飛散物がケース部材12の内壁面24やトリガ放電膜28に付着・堆積することが、放電開始電圧の不安定化をもたらす原因であり、特に、スパッタ飛散物の堆積量が、ケース部材12の内壁面24やトリガ放電膜28の箇所毎にバラバラであることが、放電開始電圧の不安定化を促進する大きな要因となっている。
すなわち、上記第３のサージ吸収素子40の如く、被膜30の形成される穴部29が、放電電極部18の表面にマトリクス状に配置形成されていると、円筒状のケース部材12の内壁面24と各穴部29との距離がバラバラであるため、穴部29との距離が小さい箇所のケース部材12の内壁面24・トリガ放電膜28へのスパッタ飛散物の堆積量は多くなり、一方、穴部29との距離が大きい箇所のケース部材12の内壁面24・トリガ放電膜28へのスパッタ飛散物の堆積量は少ないことから、放電開始電圧の不安定化を生じることがある。
これに対し、本考案に係る第４のサージ吸収素子50にあっては、被膜30が形成される多数の穴部29を、円筒状のケース部材12の内壁面24と同心の円Ｘ，Ｙ上に配置形成したので、同一の円Ｘ又はＹ上に配置された各穴部29とケース部材12の内壁面24との距離は全て同一となる。
このため、ケース部材12の内壁面24の特定の箇所及び特定のトリガ放電膜28において、スパッタ飛散物の堆積量に多少の差が生じることを抑制でき、ケース部材12の内壁面24及びトリガ放電膜28へのスパッタ飛散物の堆積量が平準化されるので、放電開始電圧の安定化を実現できる。 Note that the coating 30 is easily sputtered by an impact at the time of discharge, and the spatter scattered on the inner wall surface 24 and the trigger discharge film 28 of the case member 12 causes the discharge start voltage to become unstable. In particular, the fact that the amount of spatter scattered is different for each part of the inner wall surface 24 and the trigger discharge film 28 of the case member 12 is a major factor that promotes instability of the discharge start voltage. .
That is, if the holes 29 in which the coating 30 is formed are arranged in a matrix on the surface of the discharge electrode portion 18 as in the third surge absorbing element 40, the inner wall surface of the cylindrical case member 12 is formed. Since the distance between each of the holes 24 and the holes 29 varies, the amount of spatter scattered on the inner wall surface 24 and the trigger discharge film 28 of the case member 12 where the distance from the holes 29 is small increases. In addition, since the amount of spatter scattered on the inner wall surface 24 and trigger discharge film 28 of the case member 12 where the distance to the hole 29 is large is small, the discharge start voltage may become unstable.
On the other hand, in the fourth surge absorbing element 50 according to the present invention, a large number of holes 29 in which the coating 30 is formed are made into circles X and Y concentric with the inner wall surface 24 of the cylindrical case member 12. Since they are arranged and formed above, the distances between the holes 29 arranged on the same circle X or Y and the inner wall surface 24 of the case member 12 are all the same.
For this reason, it is possible to suppress the occurrence of a slight difference in the amount of spatter scattered in a specific portion of the inner wall surface 24 of the case member 12 and a specific trigger discharge film 28, and the inner wall surface 24 and trigger discharge of the case member 12 can be suppressed. Since the amount of spatter scattered on the film 28 is leveled, the discharge start voltage can be stabilized.

本考案に係る第１のサージ吸収素子を示す概略断面図である。It is a schematic sectional drawing which shows the 1st surge absorption element which concerns on this invention. 本考案に係る第１のサージ吸収素子の放電電極とトリガ放電部材を示す部分拡大断面図である。It is a partial expanded sectional view which shows the discharge electrode and trigger discharge member of the 1st surge absorption element which concern on this invention. 図２のＸ−Ｘ概略断面図である。It is XX schematic sectional drawing of FIG. 本考案に係る第１のサージ吸収素子のＡＣ耐電圧試験のＦａｉｌ電圧の分布を示すヒストグラムである。It is a histogram which shows distribution of the Fail voltage of the AC withstand voltage test of the 1st surge absorption element which concerns on this invention. 比較例のサージ吸収素子のＡＣ耐電圧試験のＦａｉｌ電圧の分布を示すヒストグラムである。It is a histogram which shows distribution of the Fail voltage of the AC withstanding voltage test of the surge absorption element of a comparative example. 本考案に係る第１のサージ吸収素子のインパルス放電開始電圧の分布を示すヒストグラムである。It is a histogram which shows distribution of the impulse discharge start voltage of the 1st surge absorption element which concerns on this invention. 比較例のサージ吸収素子のインパルス放電開始電圧の分布を示すヒストグラムである。It is a histogram which shows the distribution of the impulse discharge start voltage of the surge absorption element of a comparative example. 本考案に係る第２のサージ吸収素子を示す概略断面図である。It is a schematic sectional drawing which shows the 2nd surge absorption element which concerns on this invention. 図８のＡ−Ａ概略断面図である。It is an AA schematic sectional drawing of FIG. 本考案に係る第３のサージ吸収素子を示す概略断面図である。It is a schematic sectional drawing which shows the 3rd surge absorption element which concerns on this invention. 図１０のＢ−Ｂ概略断面図である。It is BB schematic sectional drawing of FIG. 本考案に係る第３のサージ吸収素子の要部拡大断面図である。It is a principal part expanded sectional view of the 3rd surge absorption element which concerns on this invention. 本考案に係る第２のサージ吸収素子の放電電極部表面を示す拡大図である。It is an enlarged view which shows the discharge electrode part surface of the 2nd surge absorption element which concerns on this invention. 本考案に係る第４のサージ吸収素子を示す概略断面図である。It is a schematic sectional drawing which shows the 4th surge absorption element which concerns on this invention. 図１４のＣ−Ｃ概略断面図である。It is CC schematic sectional drawing of FIG. 本考案に係る第３のサージ吸収素子の要部拡大断面図である。It is a principal part expanded sectional view of the 3rd surge absorption element which concerns on this invention. 本考案に係る第３のサージ吸収素子の放電電極部表面を示す拡大図である。It is an enlarged view which shows the discharge electrode part surface of the 3rd surge absorption element which concerns on this invention. 本考案に係る第３のサージ吸収素子の変形例の放電電極部表面を示す拡大図である。It is an enlarged view which shows the discharge electrode part surface of the modification of the 3rd surge absorption element which concerns on this invention. 本考案に係る第３のサージ吸収素子の変形例の要部拡大断面図である。It is a principal part expanded sectional view of the modification of the 3rd surge absorption element which concerns on this invention. 従来の放電管を示す概略断面図である。It is a schematic sectional drawing which shows the conventional discharge tube.

001 第１のサージ吸収素子
002 気密外囲器
003 放電電極
004 トリガ放電部材
005 放電間隙
009 被膜
010 トリガ放電部材の本体部
011 トリガ放電部材の孔
012 導電性被膜
013 トリガ放電部材の凸部
015 微小放電間隙
10 第２のサージ吸収素子
12 ケース部材
14 蓋部材
16 気密外囲器
18 放電電極部
20 接合部
22 放電間隙
24 ケース部材の内壁面
26 微小放電間隙
28 トリガ放電膜
29 穴部
30 被膜
40 第３のサージ吸収素子
50 第４のサージ吸収素子
Ｘ円筒状のケース部材の内壁面と同心の円
Ｙ円筒状のケース部材の内壁面と同心の円 001 First surge absorber
002 Airtight envelope
003 Discharge electrode
004 Trigger discharge member
005 Discharge gap
009 Coating
010 Trigger discharge member body
011 Trigger discharge member hole
012 Conductive coating
013 Convex part of trigger discharge member
015 Micro discharge gap
10 Second surge absorber
12 Case material
14 Lid member
16 Airtight envelope
18 Discharge electrode
20 joints
22 Discharge gap
24 Inner wall surface of case member
26 Micro discharge gap
28 Trigger discharge membrane
29 holes
30 coating
40 Third surge absorber
50 Fourth surge absorber X A circle Y concentric with the inner wall surface of the cylindrical case member Y A circle concentric with the inner wall surface of the cylindrical case member

Claims

A surge absorbing element in which a plurality of discharge electrodes are arranged with a discharge gap and sealed together with a discharge gas in an airtight envelope, and the discharge gas is mixed with argon and sulfur hexafluoride. A surge absorbing element characterized by comprising:

A plurality of discharge electrodes arranged opposite to each other with a discharge gap and a trigger discharge member provided with a conductive coating arranged opposite to each discharge electrode with a minute discharge gap enclosed in a hermetic envelope together with a discharge gas. A surge absorbing element, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

A plurality of discharge electrodes are arranged with a discharge gap therebetween, and this is enclosed in a hermetic envelope together with a discharge gas, and further, a film containing a substance having good electron emission characteristics is formed on the surface of the discharge electrode. A surge absorbing element, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride.

A plurality of discharge electrodes are arranged with a discharge gap therebetween, and this is enclosed in a hermetic envelope together with a discharge gas. Further, a plurality of holes are formed on the surface of the discharge electrode, and the inner surface of the hole is formed. A surge absorbing element formed by forming a film containing a substance having a good electron emission characteristic, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride .

A hermetic envelope is formed by hermetically sealing both ends of the cylindrical case member with a pair of lid members that also serve as discharge electrodes, and a discharge gas is sealed in the hermetic envelope, In addition, a discharge gap is formed between the discharge electrode portions of the lid member arranged in the hermetic envelope, and both ends of the case member are arranged on the inner wall surface of the case member with a minute discharge gap therebetween. A plurality of trigger discharge films are formed, and a plurality of holes are formed on the surface of the discharge electrode portion on a circle concentric with the inner wall surface of the cylindrical case member. A surge absorbing element formed by forming a coating containing a substance having good electron emission characteristics on the inner surface, wherein the discharge gas is composed of a mixed gas of argon and sulfur hexafluoride. element.

The surge absorbing element according to any one of claims 1 to 5, wherein the mixing ratio of argon is 10 to 99.9% by volume and the mixing ratio of sulfur hexafluoride is 90 to 0.1% by volume. .