CN104134570A

CN104134570A - Vacuum relay ceramic chip

Info

Publication number: CN104134570A
Application number: CN201410395708.1A
Authority: CN
Inventors: 朱广汇
Original assignee: WUXI KANGWEI ENGINEERING CERAMIC Co Ltd
Current assignee: WUXI KANGWEI ENGINEERING CERAMIC Co Ltd
Priority date: 2014-08-12
Filing date: 2014-08-12
Publication date: 2014-11-05

Abstract

The invention provides a vacuum relay ceramic chip which comprises a sheet ceramic substrate. The vacuum relay ceramic chip is characterized in that an annular flange is arranged on the periphery of the front face of the ceramic substrate, a plurality of through holes required by a relay structure are formed in the ceramic substrate, an annular protrusion is arranged on the outer side of each through hole in the back face of the ceramic substrate, and metallizing layers are arranged on the flange on the front face of the ceramic substrate and the protrusions on the outer sides of the through holes in the back face of the ceramic substrate. Furthermore, each metallizing layer comprises a molybdenum layer and a nickel layer which are sequentially arranged on the ceramic surface from interior to exterior. After the flange on the front face of the ceramic substrate and the protrusions on the outer sides of the through holes in the back face of the ceramic substrate are metallized, the flange and the protrusions are connected with corresponding metal components of a relay to play a role in arc extinction when the relay is powered on, and the phenomenon that the vacuum relay ceramic chip is easily broken by sparks generated when the relay works is avoided due to the uniform density.

Description

Vacuum relay ceramics

Technical field

The present invention relates to a kind of relay block, the ceramics that especially a kind of relay is used.

Background technology

Vacuum relay is modal a kind of high-voltage relay, feature is that the contact part of relay is sealed in a vacuum, make relay can under minimum volume, obtain high dielectric withstanding voltage, because the gas molecule in vacuum is considerably less, so vacuum relay also has advantages of that contact resistance is little, be particularly suitable for requiring in the multi-path switching system of logical super-high-current.Parts in vacuum relay are selected aluminium oxide ceramics conventionally, in actual use because the consistent in density of aluminium oxide ceramics is not high and ceramic dimensional discrepancy is large, very easily cause relay functional reliability to reduce, and equipment is caused to adverse effect.

Summary of the invention

The object of the present invention is to provide a kind of arc quenching effect good, the vacuum relay ceramics that thermal endurance is good, can effectively extend useful life of relay.The technical solution used in the present invention is:

A kind of vacuum relay ceramics, comprises the ceramic matrix of a sheet, and improvements are:

Have a circle flange in the positive surrounding of ceramic matrix, have the needed through hole of multiple relay constructions in ceramic matrix, at the ceramic matrix back side, each through hole outside is equipped with a circle projection; In projection outside the each through hole of flange and the back side in ceramic matrix front, be equipped with metal layer.

Further, described metal layer comprises molybdenum layer and the nickel dam that ceramic surface sets gradually from inside to outside.

Further, have two upper and lower symmetrical PATENT left side via in the left side of ceramic matrix; Have two upper and lower symmetrical middle through-holes at the middle part of ceramic matrix; Have two upper and lower symmetrical right side through holes on the right side of ceramic matrix; Between the through hole of right side, have a right side intermediate throughholes.

Further, have an oval transverse concave groove in the front of ceramic matrix central authorities.

Advantage of the present invention:

1) good insulating of product, thermal endurance is strong.

2) arc quenching effect is good, and thermal endurance is good.

3) consistent in density is high, and dimensional discrepancy is little.

Brief description of the drawings

Fig. 1 is structural front view of the present invention.

Fig. 2 is that the A-A of Fig. 1 is to cutaway view.

Fig. 3 is that A '-A ' of Fig. 1 is to cutaway view.

Fig. 4 is that the C-C of Fig. 1 is to cutaway view.

Fig. 5 is that the B-B of Fig. 1 is to cutaway view.

Fig. 6 is structure rearview of the present invention.

Embodiment

Below in conjunction with concrete drawings and Examples, the invention will be further described.

As shown in Fig. 1～Fig. 6, a kind of vacuum relay ceramics proposed by the invention, comprises the ceramic matrix of a round sheet.

Have two upper and lower symmetrical PATENT left side via 3,4 in the left side of ceramic matrix; Have two upper and lower symmetrical middle through-holes 1,5 at the middle part of ceramic matrix; Have an oval transverse concave groove 2 in the front of ceramic matrix central authorities; Have two upper and lower symmetrical right side through holes 7,9 on the right side of ceramic matrix; Between right side through hole 7,9, have a right side intermediate throughholes 8.There is a circle flange 6 in the positive surrounding of ceramic matrix.

At the ceramic matrix back side, each through hole outside is equipped with a circle projection, projection 10,11,12,13,14,15,16 as shown in Figure 6.

Projection 10,14 corresponding middle through-holes 1,5;

Projection 11,13 corresponding right side through holes 7,9;

Projection 12 corresponding right side intermediate throughholes 8;

Projection 15,16 corresponding PATENT left side via 3,4;

In projection 10,11,12,13,14,15,16 outside the each through hole of flange 6 and the back side in ceramic matrix front, be equipped with metal layer.

The making brief introduction of metal layer:

First, use the paste taking molybdenum as primary raw material, print to the projection in the each through hole of flange 6 and the back side outside in ceramic matrix front by screen printing mode; Then by the mode of sintering, make metal molybdenum dissolve in ceramic surface, dissolve each other and interpenetrate formation molybdenum layer with ceramic surface;

Then, use the paste taking nickel as primary raw material, print to the projection in the each through hole of flange 6 and the back side outside in ceramic matrix front by screen printing mode; Then by the mode of sintering, make metallic nickel dissolve in ceramic surface, dissolve each other and interpenetrate formation nickel dam with ceramic surface.

Molybdenum layer and nickel dam form metal layer jointly.

After the projection 10,11,12,13,14,15,16 in the flange 6 in ceramic matrix front and the back side each through hole outside metallizes, it is connected with corresponding relay metal parts, in the time of relay power, play the effect of arc extinguishing, the spark producing when density is avoided being worked by relay uniformly punctures easily, and good thermal endurance has also effectively extended the useful life of relay.

Claims

1. a vacuum relay ceramics, comprises and it is characterized in that the ceramic matrix of a sheet:

Have a circle flange (6) in the positive surrounding of ceramic matrix, have the needed through hole of multiple relay constructions in ceramic matrix, at the ceramic matrix back side, each through hole outside is equipped with a circle projection;

In projection outside the each through hole of flange (6) and the back side in ceramic matrix front, be equipped with metal layer.

2. vacuum relay ceramics as claimed in claim 1, is characterized in that:

Described metal layer comprises molybdenum layer and the nickel dam that ceramic surface sets gradually from inside to outside.

3. vacuum relay ceramics as claimed in claim 1 or 2, is characterized in that:

Have two upper and lower symmetrical PATENT left side via (3,4) in the left side of ceramic matrix; Have two upper and lower symmetrical middle through-holes (1,5) at the middle part of ceramic matrix; Have two upper and lower symmetrical right side through holes (7,9) on the right side of ceramic matrix; Between right side through hole (7,9), have a right side intermediate throughholes (8).

4. vacuum relay ceramics as claimed in claim 1 or 2, is characterized in that:

Have an oval transverse concave groove (2) in the front of ceramic matrix central authorities.