WO2017113957A1

WO2017113957A1 - Gas discharge tube and metallization electrode used thereby

Info

Publication number: WO2017113957A1
Application number: PCT/CN2016/103193
Authority: WO
Inventors: 付猛; 何济; 王飞龙
Original assignee: 深圳市槟城电子有限公司
Priority date: 2015-12-29
Filing date: 2016-10-25
Publication date: 2017-07-06
Also published as: CN105470089B; CN105470089A

Abstract

Provided are a gas discharge tube and a metallization electrode used thereby. The gas discharge tube comprises at least two electrodes and an insulating tube body which is in sealing connection with the electrodes to form a discharge inner chamber. At least one of the electrodes is a metallization electrode of an insulating material. The metallization electrode comprises a discharge plane for gas discharging and a conducting plane for being connected to an external circuit. The discharge plane is connected to the conducting plane. The gas discharge tube can have the function of discharging a lightning current or an overvoltage when subjected to a lightning strike or an overvoltage surge. Moreover, when the gas discharge tube heats and warms up, due to discharging, to melt a metal covering layer or a metallization layer on the discharge plane while subjected to a certain continuous power current or an excessive power current, the discharge plane exposed in the discharge inner chamber is an insulator or a poor conductor, which does not discharge or has a weakened discharge effect, thereby effectively interrupting a follow current.

Description

Gas discharge tube and metallized electrode therefor

[0001] The present invention relates to the field of overvoltage protection products, and in particular to a gas discharge tube and a metallized electrode therefor

[0002] A gas discharge tube is a type of protection device that is commonly used as an overvoltage protection device. At present, the gas discharge tube generally used is made of a ceramic tube and a metal electrode sealed at both ends thereof, and the inner chamber is filled with an inert gas. When the voltage across the gas discharge tube electrode exceeds the breakdown voltage of the gas, a gap discharge is caused, and the gas discharge tube rapidly changes from a high resistance state to a low resistance state to form a conduction, thereby protecting other devices connected in parallel thereto. . However, since the metal electrode is sealed with a ceramic tube, if the overvoltage is long or the frequency is high or a power frequency overcurrent 吋 between long turns or a large current occurs, the gas discharge tube is Suffering from long turns or frequent overcurrents, heating increases. Excessive temperature not only affects the safe use of other devices in the circuit, but also causes the two metal electrodes of the gas discharge tube to be melted. The amount of sputtering is large, and it is easy to discharge. The internal impedance of the tube drops and even forms a short circuit.

technical problem

[0003] It is an object of the present invention to provide a gas discharge tube capable of providing effective overvoltage protection for a circuit, forming a circuit at an overcurrent temperature rise, and cutting the circuit.

Problem solution

Technical solution

In view of this, an embodiment of the present invention provides a gas discharge tube including at least two electrodes and an insulating tube body sealedly connected to the electrode to form a discharge inner cavity, at least one of the electrodes being metallized by an insulating material. An electrode, the metallized electrode comprising a discharge surface for gas discharge and a conductive surface for connection to an external circuit, the discharge surface being electrically connected to the conductive surface.

[0005] Further, the metallized electrode comprises a substrate made of an insulating material, the substrate includes the discharge surface and the conductive surface, and the discharge surface and the conductive surface are provided with a metal coating layer. The metal coating on the discharge surface is electrically connected to the metal coating on the conductive surface. [0006] Further, the electrical connection between the metal cover layer on the discharge surface and the metal cover layer on the conductive surface includes:

The metal coating layer on the discharge surface is electrically connected to the metal coating layer on the conductive surface by a conductive conductor disposed on a side surface and an inner surface of the substrate.

[0008] Further, the metal cover layer on the discharge surface and the metal cover layer on the conductive surface are electrically connected:

[0009] The base body is provided with a through hole communicating with the discharge surface and the outer surface, and a conductive conductor is disposed in the through hole and the outer surface, and the metal coating layer on the discharge surface passes through the The connected conductors are electrically connected to the metal cover on the conductive surface.

[0010] Further, the metal cover layer on the discharge surface and the metal cover layer on the conductive surface are electrically connected:

[0011] a through hole is disposed in the base body, and an inner surface contacting the conductive surface is provided with a conductor, the through hole communicates with the discharge surface and the inner surface, and the through hole is provided with a conductor. The metal cover layer on the discharge surface is electrically connected to the metal cover layer on the conductive surface through the conductor in the through hole and the conductor on the inner surface

[0012] Further, the metallized electrode is made of ceramic, and the discharge surface and the conductive surface are both ceramic metallization layers.

[0013] Further, the metallized electrode is made of ceramic metallization.

[0014] Further, a metal layer is disposed on the discharge surface of the metallized electrode.

[0015] Further, the metallized electrode is provided with a weak point which is easy to be cleaved, and the weak point is cleaved at a high temperature, causing gas leakage in the discharge inner cavity.

[0016] Correspondingly, an embodiment of the present invention further provides a metallization electrode for a gas discharge tube, wherein the metallization electrode is an insulating material metallization electrode, and the metallization electrode includes a discharge surface for gas discharge and is used for a conductive surface connected to the external circuit, the discharge surface being electrically connected to the conductive surface

[0017] Further, the metallized electrode comprises a substrate made of an insulating material, the substrate includes a discharge surface and a conductive surface, and the discharge surface and the conductive surface are provided with a metal coating layer, and the discharge surface The metal cover layer is electrically connected to the metal cover layer on the conductive surface.

[0018] Further, the metal cover layer on the discharge surface and the metal cover layer on the conductive surface are electrically connected Includes:

[0019] The metal cap layer on the discharge surface is electrically connected to the metal cap layer on the conductive surface by a conductive conductor disposed on a side surface and an inner surface of the substrate.

[0020] Further, the metal cover layer on the discharge surface and the metal cover layer on the conductive surface are electrically connected:

[0021] The base body is provided with a through hole communicating with the discharge surface and the outer surface, wherein the through hole and the outer surface are provided with a communicating conductor, and the metal cover layer on the discharge surface passes through the The connected conductors are electrically connected to the metal cover on the conductive surface.

[0022] Further, the metal cover layer on the discharge surface and the metal cover layer on the conductive surface are electrically connected:

[0023] a through hole is disposed in the base body, and an inner surface contacting the conductive surface is provided with a conductor, the through hole communicates with the discharge surface and the inner surface, and the through hole is provided with a conductor. The metal cover layer on the discharge surface is electrically connected to the metal cover layer on the conductive surface through the conductor in the through hole and the conductor on the inner surface

[0024] Further, the metallized electrode is made of ceramic, and the discharge surface and the conductive surface are both ceramic metallization layers.

[0025] Further, the metallized electrode is made of ceramic metallization.

Further, a metal layer is disposed on the discharge surface of the metallized electrode.

[0027] Further, the metallized electrode is provided with a weak point which is easy to be split, and the weak point is split at a high temperature.

Beneficial effect

[0028] The gas discharge tube provided by the embodiment of the present invention can exhibit the performance of overvoltage protection after being subjected to lightning overvoltage, and is heated to the melting station due to excessive heat or long overcurrent. The metal coating layer or the metallization layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or a poor conductor, and the discharge is not discharged or the discharge effect is weakened, thereby effectively interrupting the freewheeling, and having a good overvoltage and Overcurrent protection performance.

Brief description of the drawing DRAWINGS

In order to make the content of the present invention easier to understand, the present invention will be further described in detail below with reference to the accompanying drawings

1 is a schematic cross-sectional structural view of a gas discharge tube according to a first embodiment of the present invention;

2 is a schematic structural view of a metallized electrode for a gas discharge tube according to a second embodiment of the present invention;

3 is a schematic structural view of a base body of a metallized electrode for a gas discharge tube according to an embodiment of the present invention;

4 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 3 of the present invention;

5 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 4 of the present invention;

6 is a schematic cross-sectional structural view of a metallized electrode for a gas discharge tube according to Embodiment 4 of the present invention;

7 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 5 of the present invention;

8 is a schematic cross-sectional structural view of a metallized electrode for a gas discharge tube according to a fifth embodiment of the present invention;

9 is a schematic cross-sectional structural view of a gas discharge tube according to Embodiment 6 of the present invention;

10 is a schematic cross-sectional structural view of a gas discharge tube according to a preferred embodiment of the sixth embodiment of the present invention;

11 is a schematic cross-sectional structural view of a gas discharge tube according to a preferred embodiment of the sixth embodiment of the present invention.

Invention embodiment

Embodiments of the invention

[0041] The present invention will be further illustrated by the following examples in conjunction with the accompanying drawings. It should be noted that the gas discharge tube of the present invention includes a diode, a triode and a multi-pole tube. In the following embodiments, for the sake of simplicity, a diode is used as an embodiment. The insulating tube body of the present invention is a glass tube. , porcelain tube or other insulating tube body suitable as a material of the gas discharge tube; the outer surface, the inner surface and the inner side surface of the invention are defined as relative gas discharge tubes, which are defined for convenience of description, and are common in the art. People can also define any other names for them.

[0042] Embodiment 1 of the present invention provides a gas discharge tube. Referring to FIG. 1 , FIG. 1 is a schematic cross-sectional structural view of a gas discharge tube according to Embodiment 1 of the present invention. The gas discharge tube 1 includes two electrodes 11 . The insulating tube body 12, the electrode 11 and the insulating tube body 12 are sealingly connected to form a discharge inner cavity 13.

[0043] wherein, at least one of the electrodes is an insulating metallization electrode, the metallized electrode comprises a substrate made of an insulating material, and the structure of the substrate is described in conjunction with FIG. 3, and FIG. 3 is a metallization of the gas discharge tube according to the embodiment of the present invention. Schematic diagram of the structure of the base of the electrode, the base body including an outer surface 115 (the outer surface 115 is The surface of the inner surface 113 opposite to the conductive surface 112, which is not shown in the drawing, is indicated by a broken line, the conductive surface 112, the inner surface 113, the inner side surface 114, and the discharge surface 111. The substrate includes a discharge surface 111 for gas discharge and a conductive surface 112 for connecting to an external circuit. The discharge surface 111 and the conductive surface 112 are provided with a metal cover layer, and the metal cover on the discharge surface 111 The layer is electrically connected to the metal cap layer on the conductive surface 112. Preferably, the insulating material is ceramic; preferably, the metal coating layer is a tungsten or molybdenum manganese layer.

[0044] In a preferred embodiment, the metal cover layer on the discharge surface 111 is electrically connected to the metal cover layer on the conductive surface 112 in such a manner that the metal cover layer on the discharge surface passes through the placement layer. The communicating conductors on the side and inner surfaces of the substrate are electrically connected to the metal coating on the conductive surface. Specifically, please refer to the metallized electrode provided in Embodiment 2 and FIG. 2 of the present invention.

[0045] In another preferred embodiment, the metal cover layer on the discharge surface 111 is electrically connected to the metal cover layer on the conductive surface 112 in such a manner that all inner and inner surfaces of the substrate are covered. Conductors that are connected to each other. Specifically, please refer to the metallization electrodes provided in Embodiment 3 and FIG. 4 of the present invention.

[0046] In another preferred embodiment, the metal cover layer on the discharge surface 111 is electrically connected to the metal cover layer on the conductive surface 112 in a manner that: the base body is provided with a through hole to communicate the discharge And a surface of the through hole and the outer surface of the through hole, wherein the metal cover layer on the discharge surface is electrically connected to the metal cover layer on the conductive surface through the connected conductor . Specifically, please refer to the metallized electrodes provided in Embodiment 4 of the present invention and FIGS. 5 and 6.

[0047] In another preferred embodiment, the metal cover layer on the discharge surface 111 is electrically connected to the metal cover layer on the conductive surface 112 in a manner that: the base body is provided with a through hole, and The inner surface of the conductive surface is provided with a conductor, the through hole communicates with the discharge surface and the inner surface, a conductor is disposed in the through hole, and a metal coating layer on the discharge surface passes through the through hole The conductor and the conductor of the inner surface are electrically connected to the metal coating on the conductive surface. Specifically, please refer to the metallized electrodes provided in Embodiment 5 and FIG. 7 and FIG. 8 of the present invention.

[0048] This embodiment has the following advantages:

[0049] The gas discharge tube provided in this embodiment can withstand the performance of overvoltage protection after being subjected to lightning overvoltage ;; and, when subjected to excessive current or long overcurrent, heats up to the melting station due to arc discharge heat generation. The metal coating layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or is defective The conductor causes the discontinuity or blockage of the electrical connection, causing the discharge path to lengthen, causing no discharge or weakening of the discharge effect, thereby effectively interrupting the freewheeling, and having good overvoltage and overcurrent protection performance.

2 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 2 of the present invention. As shown in FIG. 2, the metallized electrode of the present embodiment includes: a substrate made of an insulating material. The structure of the substrate is as described in conjunction with FIG. 3. FIG. 3 is a substrate of a metallized electrode for a gas discharge tube according to an embodiment of the present invention. Schematic diagram of the structure, the base body includes an outer surface 115 (the outer surface 115 is a surface opposite to the inner surface 113 and is in contact with the conductive surface 112, which is not shown in the figure, so indicated by a broken line), the conductive surface 112, the inner surface Surface 113, inner side surface 114, and discharge surface 111. The substrate includes a discharge surface for gas discharge and a conductive surface for connecting to an external circuit, and the discharge surface is provided with a metal cover layer 21, and the conductive surface is provided with a metal cover layer 24 on the side of the substrate body a conductor 22 is disposed, the inner surface is provided with a conductor 23, the conductor 22 is in communication with the conductor 23, and the metal cover layer 21 on the discharge surface passes through the conductor 22 and the conductor 23 The metal cover layer 24 on the conductive surface is electrically connected.

[0051] Preferably, the insulating material is ceramic; preferably, the metal coating layer is a tungsten or molybdenum manganese layer; preferably, the conductor is made of gold, silver, copper or other materials with good electrical conductivity.

[0052] This embodiment has the following advantages:

[0053] The gas discharge tube provided in this embodiment can withstand the overvoltage protection performance after being subjected to lightning overvoltage, and is heated to the melting station due to excessive current or long overcurrent. In the metal coating layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or a poor conductor, causing discontinuity or blockage of the electrical connection, resulting in lengthening of the discharge path, resulting in no discharge or discharge effect. Attenuated to effectively interrupt the freewheeling, with good overvoltage and overcurrent protection.

4 is a schematic structural view of a metallized electrode for a gas discharge tube according to a third embodiment of the present invention. As shown in FIG. 4, the electrode of the embodiment includes: a substrate made of an insulating material, and the structure of the substrate is as shown in FIG. The substrate includes a discharge surface for gas discharge and a conductive surface for connecting to an external circuit. The discharge surface is provided with a metal cover layer 41. The conductive surface is provided with a metal cover layer 44. A conductor 42 is disposed at a position, and a conductor 43 is disposed on the inner surface, the conductor 42 is in communication with the conductor 43, and the metal cover layer 41 passes through the communicated conductor 42 and the conductor 43 The metal cover layer 44 on the conductive surface is electrically connected.

[0055] Preferably, the insulating material is ceramic; preferably, the metal coating layer is a tungsten or molybdenum manganese layer; The conductor is made of gold, silver, copper or other materials with good electrical conductivity.

[0056] This embodiment has the following advantages:

[0057] The gas discharge tube provided in this embodiment can withstand the performance of overvoltage protection after being subjected to lightning overvoltage ;; and, when subjected to excessive current or long overcurrent, heats up to the melting station due to arc discharge heat generation. In the metal coating layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or a poor conductor, causing discontinuity or blockage of the electrical connection, resulting in lengthening of the discharge path, resulting in no discharge or discharge effect. Attenuated to effectively interrupt the freewheeling, with good overvoltage and overcurrent protection.

5 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 4 of the present invention; FIG. 6 is a cross section of a metallized electrode for a gas discharge tube according to Embodiment 4 of the present invention; Schematic. The electrode of this embodiment includes: a substrate made of an insulating material, and the structure of the substrate is as shown in FIG. The substrate includes a discharge surface for gas discharge and a conductive surface for connecting to an external circuit. The discharge surface is provided with a metal cover layer 51. The conductive surface is provided with a metal cover layer 54. a through hole 52 connecting the discharge surface and the outer surface 115, a conductor disposed in the through hole 52, a conductor disposed on the outer surface 115, and a conductor in the through hole 52 and the outer surface 115 The upper conductors are in communication, and the metal coating layer 54 on the discharge surface is electrically connected to the metal coating layer 54 on the conductive surface via the communicating conductor.

[0059] Preferably, the insulating material is ceramic; preferably, the metal coating layer is a tungsten or molybdenum manganese layer; preferably, the conductor is made of gold, silver, copper or other materials with good electrical conductivity.

[0060] This embodiment has the following advantages:

[0061] The gas discharge tube provided in this embodiment can withstand the performance of overvoltage protection after being subjected to lightning overvoltage, and is heated to the melting station due to excessive current or long overcurrent. In the metal coating layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or a poor conductor, causing discontinuity or blockage of the electrical connection, resulting in lengthening of the discharge path, resulting in no discharge or discharge effect. Attenuated to effectively interrupt the freewheeling, with good overvoltage and overcurrent protection.

Referring to FIG. 7 and FIG. 8, FIG. 7 is a schematic structural view of a metallized electrode for a gas discharge tube according to Embodiment 5 of the present invention; FIG. 8 is a cross section of a metallized electrode for a gas discharge tube according to Embodiment 5 of the present invention; Schematic. The electrode of this embodiment includes: a substrate made of an insulating material, and the structure of the substrate is described in conjunction with FIG. 3. The substrate includes a discharge surface for gas discharge and a conductive connection for connection to an external circuit a metal cover layer 61 is disposed on the discharge surface, a metal cover layer 64 is disposed on the conductive surface, and a through hole 62 connecting the discharge surface and the inner surface 113 is disposed in the base body, and the through hole is a conductor is provided in 62, a conductor is disposed on the inner surface 113, a conductor in the through hole 62 communicates with a conductor on the inner surface 113, and the metal coating layer 61 on the discharge surface passes through the communication The conductor is electrically connected to the metal cap layer 64 on the conductive surface.

[0063] Preferably, the insulating material is ceramic; preferably, the metal coating layer is a tungsten or molybdenum manganese layer; preferably, the conductor is made of gold, silver, copper or other materials with good electrical conductivity.

[0064] This embodiment has the following advantages:

[0065] The gas discharge tube provided in this embodiment can withstand the performance of overvoltage protection after being subjected to lightning overvoltage ;; and, when subjected to excessive current or long overcurrent, heats up to the melting station due to arc discharge heat generation. In the metal coating layer on the discharge surface, the discharge surface exposed in the discharge cavity is an insulator or a poor conductor, causing discontinuity or blockage of the electrical connection, resulting in lengthening of the discharge path, resulting in no discharge or discharge effect. Attenuated to effectively interrupt the freewheeling, with good overvoltage and overcurrent protection.

9-11, FIG. 9 is a schematic cross-sectional view of a gas discharge tube according to Embodiment 6 of the present invention. The gas discharge tube includes: an electrode 91, an electrode 93, an insulating tube 92, an electrode and an insulation. The tubular sealing connection forms a discharge lumen, and the electrode includes a discharge surface 94, a conductive surface 95.

[0067] wherein, at least one of the electrodes is a metallized electrode, and both of the electrodes are metallized electrodes. The electrode 91 in the figure is a metallized electrode, and the metalized electrode is made of ceramic metallization.

[0068] Preferably, for the simplicity of the process, the metallized electrode may also be made of ceramic, except that the discharge surface and the conductive surface are both ceramic metallization layers. Preferably, the metallization layer is a tungsten, molybdenum manganese layer or other metal layer.

[0069] The metallized electrode may have other shapes besides the shape shown in FIG. 9. For example, the metallized electrode 10 in FIG. 10 is another shape including a discharge surface 101, a conductive surface. 102. Preferably, in order to improve the discharge effect, the metal layer 104 is disposed on the discharge surface 101 of the metallized electrode, as shown in FIG.

[0070] Preferably, the metallized electrode is provided with a weak point which is easy to be cleaved, and the weak point causes the gas in the discharge inner cavity to leak due to high temperature splitting. Ways to set the weak point include: reducing the thickness of the electrode, changing the expansion coefficient of the material, setting the groove, and the like. The advantage of setting a weak point is: Over-current temperature rise, such as If the metallization layer or the metal coating layer on the discharge layer of the metallized electrode is not completely melted, and has a discharge function 吋, the weak point is cleaved due to the temperature reaching a predetermined value, resulting in air leakage and a loop, further ensuring the Overcurrent protection of the gas discharge tube.

[0071] The gas discharge tube provided in this embodiment has the following advantages due to the use of an insulating material to metallize the electrode:

[0072] 1) The metallized electrode and the insulating tube body have the same coefficient of thermal expansion, and the product is not easily leaked when sealed;

[0073] 2) The metallized electrode is greatly reduced in the amount of sputtering by a large power frequency current, and the arc is not formed to cause the product to be short-circuited and burned.

[0074] 3) using a metallized electrode at a high temperature of the power frequency current arc, causing metallization of the surface of the metallized ceramic electrode to burn, causing localized metallization near the arc surface to be discontinuous or blocked, and on the other hand, metallizing The electrode changes from a good conductor to a poor conductor or insulator; on the other hand, the discharge gap is elongated due to discontinuity or blocking of the metallization, so that the discharge voltage rises, when the maximum voltage of the power frequency current is exceeded, no discharge or discharge efficiency Attenuated, effectively blocking the power flow.

[0075] It is to be understood that the above-described embodiments are merely illustrative of the embodiments and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. As long as the common-sense modification scheme based on the embodiment of the present invention is within the protection scope of the present application.

Claims

Claim

[Claim 1] A gas discharge tube comprising at least two electrodes and an insulating tube body sealedly connected to the electrode to form a discharge inner cavity, characterized by:

At least one of the electrodes is an insulating metallization electrode comprising a discharge face for gas discharge and a conductive face for connection to an external circuit, the discharge face being electrically connected to the conductive face.

[Claim 2] The gas discharge tube according to claim 1, wherein:

The metallized electrode comprises a substrate made of an insulating material, the substrate includes the discharge surface and the conductive surface, and the discharge surface and the conductive surface are provided with a metal coating layer, and the metal on the discharge surface The cover layer is electrically connected to the metal cover layer on the conductive surface.

[Claim 3] The gas discharge tube according to claim 2, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

The metal cover layer on the discharge surface is electrically connected to the metal cover layer on the conductive surface by a conductive conductor disposed on the side and inner surfaces of the substrate.

[Claim 4] The gas discharge tube according to claim 2, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

The base body is provided with a through hole communicating with the discharge surface and the outer surface, wherein the through hole and the outer surface are provided with a communicating conductor, and the metal covering layer on the discharge surface passes through the connected conductor and the ground The metal cover layer on the conductive surface is electrically connected.

[Claim 5] The gas discharge tube according to claim 2, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

a through hole is disposed in the base body, and an inner surface contacting the conductive surface is provided with a conductor, the through hole communicates with the discharge surface and the inner surface, and the through hole is provided with a conductor, and the discharge The metal cover layer on the surface is electrically connected to the metal cover layer on the conductive surface through the conductors in the through holes and the conductors on the inner surface.

[Clave 6] The gas discharge tube according to claim 1, wherein:

The metallized electrode is made of ceramic, and the discharge surface and the conductive surface are ceramic

[Clave 7] The gas discharge tube according to claim 1, wherein:

The metallized electrode is made of ceramic metallization.

[Claim 8] The gas discharge tube according to claim 7, wherein:

A metal layer is disposed on the discharge surface of the metallized electrode.

[Claim 9] The gas discharge tube according to claim 7, wherein:

The metallized electrode is provided with a weak point which is prone to splitting, and the weak point is more likely to be cleaved at a high temperature, causing gas leakage in the discharge inner cavity.

[Claim 10] A metallized electrode for a gas discharge tube, characterized in that:

The metallization electrode is an insulating material metallization electrode comprising a discharge surface for gas discharge and a conductive surface for connection to an external circuit, the discharge surface being electrically connected to the conductive surface.

[Claim 11] The metallized electrode according to claim 10, wherein:

The metallized electrode comprises a substrate made of an insulating material, the substrate comprises a discharge surface and a conductive surface, the discharge surface and the conductive surface are provided with a metal coating layer, and the metal coating layer on the discharge surface The metal cover layer on the conductive surface is electrically connected.

[Claim 12] The metallized electrode according to claim 11, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

[Claim 13] The metallized electrode according to claim 11, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

[Claim 14] The metallized electrode according to claim 11, wherein the electrical connection between the metal coating layer on the discharge surface and the metal coating layer on the conductive surface comprises:

a through hole is disposed in the base body, and an inner surface contacting the conductive surface is provided with a conductor, the through hole communicates with the discharge surface and the inner surface, and the through hole is provided with a conductor, and the discharge Face The upper metal cap layer is electrically connected to the metal cover layer on the conductive surface through the conductors in the through holes and the conductors on the inner surface.

[Claim 15] The metallized electrode according to claim 10, wherein:

The metallized electrode is made of ceramic, and both the discharge surface and the conductive surface are ceramic metallization layers.

[Claim 16] The metallized electrode according to claim 10, wherein:

The metallized electrode is made of ceramic metallization.

[Clave 17] The metallized electrode according to claim 16, wherein:

A metal layer is disposed on the discharge surface of the metallized electrode.

[Claim 18] The metallized electrode according to claim 16, wherein:

The metallized electrode is provided with a weak point which is prone to splitting, and the weak point is more susceptible to splitting at high temperatures.