Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of Al2O3/Nb2O3 compound dielectric film aluminum electrode foil

A technology of composite dielectric film and aluminum electrode foil, which is applied in the direction of capacitor electrodes, circuits, capacitors, etc., can solve the problems of high-purity tantalum or niobium metal electrodes and difficult application of electrolytic capacitors, so as to save energy, facilitate control, reduce The effect of manufacturing costs

Inactive Publication Date: 2010-02-17
江阴市花园电子材料有限公司
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the tantalum source or niobium source is obtained by electrochemical anodic dissolution of high-purity tantalum or niobium metal electrodes, as a consumable material in industrial applications, it will obviously lead to 1. Frequent maintenance and replacement of electrode materials are necessary; 2. , Due to the high cost of high-purity tantalum or niobium metal electrodes, it is difficult to apply this method in the electrolytic capacitor industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of Al2O3/Nb2O3 compound dielectric film aluminum electrode foil
  • Preparation method of Al2O3/Nb2O3 compound dielectric film aluminum electrode foil
  • Preparation method of Al2O3/Nb2O3 compound dielectric film aluminum electrode foil

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0033] Prepare niobium oxalate solution and control the Nb in it 5+ The ion concentrations were 0.01, 0.02, 0.03 and 0.04 mol / L, respectively, and the same aluminum corrosion foil was cut out for the same time (10 minutes) infiltration experiment. The experimental results show that when the Nb(OH) in the solution is prepared 5 When the concentration of Nb exceeds 0.03mol / L, the specific volume growth rate of the formed foil has no obvious increase. At this time, the Nb deposited on the surface of the corroded aluminum foil 2 o 5 The film layer is thicker, which will lead to the closure of some micropores on the surface of the electrode foil during the anodic oxidation process, reducing the effective area of ​​the surface of the aluminum electrode foil, which offsets the specific capacitance brought about by the increase in the dielectric constant to a certain extent. Growth, which in turn leads to a slowdown in the growth rate of the specific volume of the formed foil. Cons...

specific Embodiment approach 2

[0035] Prepare niobium oxalate solution and control the Nb in it 5+ The concentration of ions is 0.03mol / L, and the time for soaking the aluminum corrosion foil in the niobium oxalate solution is different, respectively 5min, 10min, and 15min.

[0036] image 3 It is the curve of the specific volume growth rate of the formed foil changing with the soaking treatment time. When the infiltration treatment time is short, the specific volume growth rate increases greatly with the increase of the treatment time, and the specific volume growth rate reaches the maximum when the treatment time is 10 minutes, and then decreases with the prolongation of the treatment time. The amount of deposition of Nb-containing complexes on the surface of aluminum corrosion foil increases with the increase of treatment time, and the acidic environment of the solution will also increase the dissolution of aluminum corrosion foil, so the aluminum foil should not be treated with this solution for a long...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of an Al2O3 / Nb2O3 compound dielectric film aluminum electrode foil, which belongs to the technical field of electronic materials and relates to a preparation method of a compound dielectric film aluminum electrode foil with a high specific volume. The preparation method comprises the following steps: preparing an Nb complex solution by adopting Nb(OH)5with low price and dipping an aluminum etching foil into the Nb complex solution to ensure that complexes containing Nb are adsorbed by the surface of the aluminum etching foil; then washing and drying the aluminum etching foil the surface of which adsorbs the complexes containing Nb and carrying out high-temperature heat treatment on the aluminum etching foil to ensure that the Nb complexes aredecomposed into Nb2O5; and finally, carrying out conventional formation enabling on the Nb2O5 to ensure that the Nb2O5 on the surface of the aluminum etching foil is compounded with newly grown Al2O3to obtain the Al2O3 / Nb2O5 compound dielectric film aluminum electrode foil with a high specific volume. The improvement rate of the specific volume can reach about 30 percent for the Al2O3 / Nb2O5 compound dielectric film aluminum electrode foil with a high specific volume. Meanwhile, the invention has the characteristics of lower cost, energy saving, environmental protection, simple process, easy operation and convenient control.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and relates to a method for manufacturing an anode foil of an aluminum electrolytic capacitor, in particular to a method for preparing an aluminum electrode foil with a high specific volume composite dielectric film. Background technique [0002] In the electronics industry, tantalum capacitors, ceramic capacitors, aluminum capacitors, and film capacitors are the main four types of capacitors. Aluminum electrolytic capacitors have been widely developed in the past 30 years because of their excellent performance, low price, and wide range of uses. Among the anode materials of aluminum electrolytic capacitors, aluminum anodized film Al 2 o 3 The dielectric constant of aluminum electrolytic capacitors is 8 to 10, which is an important factor restricting the improvement of the capacitance of aluminum electrolytic capacitors. In recent years, tantalum capacitors have developed rapidly ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/045H01G9/055C25D11/04
Inventor 冯哲圣孙保瑞丁甲陈金菊
Owner 江阴市花园电子材料有限公司