A preparation method of a niobium-tantalum composite capacitor with stable capacitance

A composite capacitor and capacitance technology, applied in the direction of electrolytic capacitor manufacturing, capacitor manufacturing, electrolytic capacitors, etc., can solve the problems of easy burning, short circuit, circuit board electronic circuit damage, etc., to improve capacitance, high energy density, electrical Good capacity stability

Inactive Publication Date: 2019-03-01
江苏镕耀新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of tantalum capacitors is that the electrical properties are stable, but when the product is broken down, it will cause a short circuit, and it is easy to burn, causing damage to the electronic circuit of the circuit board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a niobium-tantalum composite capacitor with stable capacitance, comprising the following steps:

[0026] (1) Mix tantalum powder and niobium powder evenly at a mass ratio of 1:8, press them into a compact with a tantalum wire lead-out wire, and sinter in vacuum at 1200°C and 0.0004Pa for 30min; place the sintered compact in phosphoric acid aqueous solution + Segmented energization in citric acid energizing solution, among them, 0-110V, boost current 90mA / g, constant voltage 3h; 110-145V, boost current 80mA / g, constant voltage 3 hours; 145-170V , boost current 80mA / g, constant voltage 5h, the entire empowerment temperature is controlled at 80°C, then heat treatment, and then in the phosphoric acid-ethylene glycol-water solution+citric acid empowerment solution at 85°C, constant pressure 8h Perform refined energization, and finally heat treatment to obtain the anode of the niobium-tantalum composite capacitor, wherein the heat treatment temperature ...

Embodiment 2

[0032] A method for preparing a niobium-tantalum composite capacitor with stable capacitance, comprising the following steps:

[0033] (1) Mix tantalum powder and niobium powder evenly with a mass ratio of 1:20, press them into a compact with a tantalum wire lead-out wire, and sinter in vacuum at 1500°C and 0.0004Pa for 60min; place the sintered compact in phosphoric acid aqueous solution + Segmented energization in citric acid energizing solution, among them, 0-110V, boost current 90mA / g, constant voltage 6h; 110-145V, boost current 80mA / g, constant voltage 6 hours; 145-170V , boost current 80mA / g, constant voltage 10h, the entire enabling temperature is controlled at 80°C, then heat treatment, and then in the phosphoric acid-ethylene glycol-water solution+citric acid empowering solution at 85°C, constant pressure 15h Perform refined energization, and finally heat treatment to obtain the anode of the niobium-tantalum composite capacitor, wherein the heat treatment temperature...

Embodiment 3

[0039] A method for preparing a niobium-tantalum composite capacitor with stable capacitance, comprising the following steps:

[0040](1) Mix tantalum powder and niobium powder evenly at a mass ratio of 1:10, press them into a compact with a tantalum wire lead-out wire, and sinter in vacuum at 1300°C and 0.0004Pa for 40min; place the sintered compact in phosphoric acid aqueous solution + Segmented energization in the energizing solution of polyethylene glycol, in which, 0-110V, boost current 90mA / g, constant voltage 4h; 110-145V, boost current 80mA / g, constant voltage 4 hours; 145 -170V, boost current 80mA / g, constant voltage for 6h, the entire empowering temperature is controlled at 80°C, then heat treatment, and then in the phosphoric acid-ethylene glycol-water solution+polyethylene glycol empowering solution at 85°C , constant voltage for 10h for refined energization, and finally heat treatment to obtain the anode of the niobium-tantalum composite capacitor, wherein the hea...

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PUM

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Abstract

The present invention discloses a preparation method of a Nb-Ta composite capacitor with stable capacitance. The method comprises the following steps: mixing tantalum powder and niobium powder according to a certain proportion; pressing the mixed tantalum powder and niobium powder to an anode briquette, performing sintering in the vacuum, then employing the technology of combination of the subsection energizing and refined energizing to perform energizing of the briquette after sintering, and obtaining the anode of the capacitor; taking a ruthenium oxide-graphene oxide-high-hydrophilia multiwalled carbon nanotube as a combined electrode employed by the cathode of the capacitor to perform encapsulation, and obtaining a Nb-Ta composite capacitor. The Nb-Ta composite capacitor prepared by the invention is high in capacitance, good in stability, good in back pressure resistance capacity, simple in preparation technology, easy to operate and low in production cost.

Description

Technical field: [0001] The invention relates to the field of capacitor preparation, in particular to a method for preparing a niobium-tantalum composite capacitor with stable capacitance. Background technique: [0002] Tantalum and niobium belong to the same group of elements, both are valve metal materials, and can be used to make capacitors. Tantalum capacitors are electrolytic capacitors processed with pure tantalum powder as the anode material, and niobium capacitors are electrolytic capacitors processed with pure niobium powder amber niobium monoxide as the anode material. The advantage of tantalum capacitors is that their electrical properties are stable, but when the product is broken down, it will cause a short circuit, and it is easy to burn, causing damage to the electronic circuit of the circuit board. The advantages of niobium capacitors are poor stability of electrical properties, nitrogen products are resistant to breakdown, do not cause short circuit during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/00H01G9/042H01G13/00
CPCH01G9/00H01G9/0029H01G9/042H01G9/0425H01G13/00
Inventor 王文庆
Owner 江苏镕耀新材料有限公司
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