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A kind of method for surface treatment of tantalum bar

A surface treatment and surface cleaning technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve problems such as explosion, harsh working conditions, splashing, etc., to improve treatment efficiency, reduce heat preservation time, improve effect of life

Active Publication Date: 2018-09-14
江门富祥电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the oxide layer formed on the surface of the tantalum strip processed by this equipment and process is uneven. During the drawing process of the tantalum strip, scratches and burrs will be formed on the local surface because there is no protective layer, which cannot effectively guarantee the surface finish of the tantalum wire. After drawing, the oxygen content in the finished tantalum wire is higher than 100PPM, which is difficult to meet the chemical purity requirements of the tantalum wire used in current tantalum capacitors
In addition, the temperature of the furnace mouth of the salt bath furnace is high and the working conditions are harsh. The molten salt liquid in the molten state will splash when it meets water, and it will burn violently and explode when it meets oil, charcoal and other organic substances.

Method used

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  • A kind of method for surface treatment of tantalum bar
  • A kind of method for surface treatment of tantalum bar
  • A kind of method for surface treatment of tantalum bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 A kind of rotating salt bath equipment

[0072] Such as figure 1 The rotary salt bath equipment shown includes a salt bath reactor 8 and a salt bath reactor 5 located in the salt bath reactor 8 . Described salt bath reactor 5 can be equipped with molten molten salt.

[0073] Described rotary salt bath equipment also contains rotary rack (as figure 1 and 2 shown). The rotating material rack includes a rotating motor 2 and a material rack 7 . Between the rotary motor 2 and the rack 7, it is connected by a connecting frame 6.

[0074] The connecting frame 6 contains a connecting rod 61, a connecting arm connected with the connecting rod. The connecting arms include a first connecting arm 62 and a second connecting arm 63 . One end of the connecting rod 61 is connected with the rotary motor 2 through the coupling 4 , and the other end of the connecting rod 61 is connected with one end of the first connecting arm 62 and the second connecting arm 63 . The...

Embodiment 2

[0081] Embodiment 2 A kind of rotating salt bath equipment

[0082] Repeat embodiment 1, have following difference with embodiment 1:

[0083] The other end of the first connecting arm 62 is detachably connected to one end of the material rack 7 (the mode of detachable connection is shown in Embodiment 1 and image 3 As shown), the other end of the second connecting arm 63 is fixedly connected to the other end of the rack 7 .

Embodiment 3

[0084] Embodiment 3 A kind of method for surface treatment of tantalum bar

[0085] The regular hexahedral tantalum bar with side length L=7.05mm that has been rolled and formed into a coil with a diameter of 300mm is soaked in an ultrasonic water tank with a degreasing agent. After the water temperature is ≥60°C, rinse for 120 minutes; the regular hexahedron after rinsing The tantalum bars are soaked in an ultrasonic water tank filled with clean water, the water temperature is ≥60°C, and cleaned for 60 minutes. The cleaned hexahedral tantalum strips are surface pretreated in a circulation oven. First, put the cleaned regular hexahedral tantalum strips into the oven, start the circulation oven, pass in filtered air, raise the temperature to 135°C, and keep it warm for 30 minutes. The surface is dewatered.

[0086] Adjust the control cabinet 10 to adjust the temperature of the molten salt in the reactor 5 of the salt bath furnace to 520° C. for standby. Then take out the clip...

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Abstract

The invention belongs to the field of tantalum wire surface treatment, and relates to rotating salt bath equipment for surface oxidation treatment in the process of tantalum wire production and a tantalum wire surface treatment method using the equipment. The rotating salt bath equipment comprises a rotary rack, a moving motor connected with the rotating rack, and a control cabinet. The rotary rack comprises a rotating motor, a connecting frame connected with the rotating motor, and a rack body connected with the connecting frame. Tantalum strips are subjected to surface treatment using the rotary salt bath equipment, the surface oxide layer thicknesses of the tantalum strips can be controlled, the tantalum strip surfaces can be oxidized uniformly, the oxygen content of oxide layers is controlled, and surface smoothness of the finished tantalum wire surface is improved.

Description

technical field [0001] The invention belongs to the field of surface treatment of tantalum wires and relates to a surface treatment method for tantalum strips in the production process of tantalum wires. Background technique [0002] Capacitors are widely used in communications, computers, automobiles, home appliances, aerospace and other fields today. Tantalum electrolytic capacitors made of tantalum powder as anode and tantalum wire as anode lead have small size, large capacitance, high degree of chipping, It has the characteristics of good reliability, long service life and other excellent comprehensive performance, so it can work normally under the harsh conditions that many other capacitors such as ceramics and aluminum film capacitors cannot do. [0003] The tantalum wire used as the anode lead of a tantalum capacitor requires high chemical purity, good surface finish, precise size, mechanical properties, and electrochemical properties to meet the strict requirements o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/42
CPCC23C8/42
Inventor 刘文国程钢郑浩宇
Owner 江门富祥电子材料有限公司