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Fuse with built-in thermal-protective coating and manufacture process thereof

A manufacturing process and technology of fuses, which are applied in the manufacture of fuses, emergency protection devices, electrical components, etc., can solve the problems of high cost, low heat resistance temperature, and low arc extinguishing performance, and achieve low cost, reduced heat dissipation, and good extinguishing The effect of arc performance

Active Publication Date: 2011-04-13
AEM COMPONENTS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this preparation method are mainly high cost, low heat resistance temperature and low arc extinguishing performance

Method used

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  • Fuse with built-in thermal-protective coating and manufacture process thereof
  • Fuse with built-in thermal-protective coating and manufacture process thereof
  • Fuse with built-in thermal-protective coating and manufacture process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the fuse includes a glass-ceramic base 1, a fusible metal conductor 2 embedded in the glass-ceramic base 1, a heat insulating layer 3 disposed on one side of the fusible metal conductor 2, and terminal electrodes (not shown in the figure), The material used for the heat insulation layer 3 is a porous ceramic glass composite material.

[0039] The preparation method of porous ceramic glass composite material is as follows:

[0040] a. Micropowdered silica gel and low-melting glass powder (melting point lower than 600°C) are wet-milled together in a weight ratio of 9:1 to a particle size of 2-3 μm, dried and evenly sieved to obtain a mixed powder;

[0041] b. Put the mixed powder into the muffle furnace, and pre-fire it for 8 to 16 hours at 500°C to 800°C;

[0042] c. The mixed powder is wet-milled until the particle size is less than or equal to 5 μm.

[0043] The manufacturing process of the above-mentioned fuse includes the following steps...

Embodiment 2

[0056] Such as figure 2 As shown, the fuse includes a glass-ceramic substrate 1, a fusible metal conductor 2 embedded in the glass-ceramic substrate 1, a thermal insulation layer 3', 3" disposed on the upper and lower surfaces of the fusible metal conductor 2, and terminal electrodes (Fig. Not shown in ), wherein the material used for the insulation layer 3', 3" is a porous ceramic glass composite material. The porous ceramic glass composite material is the same as in Example 1.

[0057] The manufacturing process of the fuse according to this embodiment includes the following steps:

[0058] (1) Obtain the green body of the fuse through the molding process of layer-by-layer addition: first coat a glass-ceramic layer with a UV-curable binder, and UV-cure the coating to form the first glass-ceramic substrate 10; Then, on the first glass-ceramic substrate 10, a slurry of porous ceramic-glass composite material with a UV-curable binder is printed by screen printing, and the slu...

Embodiment 3

[0070] The structure and manufacturing process of the fuse according to this embodiment are the same as those in Embodiment 1, except that the porous ceramic glass composite material forming the heat insulating layer 3 is prepared by the following method:

[0071] a, the hollow microspheres (mainly B 2 o 3 and Al 2 o 3 ) and low-melting point glass powder (melting point lower than 600°C) are wet-milled at a weight ratio of 9:1 to a particle size of 2-3 μm, dried and evenly sieved to obtain a mixed powder;

[0072] b. Put the mixed powder into the muffle furnace, and pre-fire it for 8-16 hours at 500℃~800℃;

[0073] c. The mixed powder is wet-milled until the particle size is less than or equal to 5 μm.

[0074] Carry out the fusing time and reliability test on the fuse of this embodiment, and the results are shown in Table 3-1 and Table 3-2 respectively.

[0075] Table 3-1 Test data of fusing time under the same overload current condition

[0076]

[0077] Table 3-2 Rel...

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Abstract

The invention relates to a fuse and a production process thereof, wherein the fuse comprises a glass-ceramic substrate, a fusible metallic conductor built in the glass-ceramic substrate, a thermal-protective coating arranged on at least one face of the fusible metallic conductor, and a terminal electrode arranged on the glass-ceramic substrate, and the thermal-protective coating is made of a porous glass-ceramic composite material. In the manufacture process, an ultraviolet curing technology is utilized, and the fuse is produced through low temperature cofiring after UV (ultraviolet) curing. The thermal-protective coating has low heat conductivity, so that the radiating of the metallic conductor is effectively reduced, and the required resistance is much smaller at the fuse demand of certain current intensity. The manufacture process provided by the invention is simple, each coating of the fuse is combined compactly, and the fuse has outstanding arc extinction performance and higher stability. The surface- mounted fuse in the structure not only has high reliable fusing property, but also has the characteristics of low resistance and low power consumption, therefore the energy consumption in the circuit can be reduced, energy sources are saved, and the fuse can be widely used in the circuit protection of mini portable electronic products.

Description

technical field [0001] The present invention relates to a fuse with a built-in heat insulation layer and its manufacturing process, more specifically, the invention relates to a surface-mount monolithic fuse with a built-in heat insulation layer, which belongs to circuit protection devices , Overcurrent protection for electrical appliances. Background technique [0002] A fuse is a device commonly used for overcurrent protection in circuits. The fuse is installed in the circuit. When the circuit works normally, it is only equivalent to a wire, which can conduct current stably for a long time; when the current fluctuates due to power supply or external interference, it should also be able to withstand a certain range of overload; ensure that the circuit safe operation. Only when the circuit breaks down or is abnormal, along with the current rising, the rising current may damage other components in the circuit, burn the electrical appliances or even cause a fire, the fuse wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/04H01H85/38H01H69/02
Inventor 李向明汪立无林丹博邓学锋
Owner AEM COMPONENTS (SUZHOU) CO LTD
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