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Titanium monoxide electrolytic capacitor anode and producing method thereof

An electrolytic capacitor, titanium monoxide technology, applied in electrolytic capacitors, capacitors, circuits and other directions, can solve the problems of reduced oxide film performance, inability to carry out oxidation, low oxidation efficiency, etc., to achieve low manufacturing cost, lower ionization energy, and improve oxidation rate effect

Inactive Publication Date: 2007-01-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of cost performance, although the price of aluminum electrolytic capacitors is low, its performance can no longer meet the increasingly stringent requirements; tantalum electrolytic capacitors have excellent performance, but their high price limits their wide application in civil fields; Material electrolytic capacitors are in the trial production stage and have not yet been industrialized on a large scale
[0003] Titanium is used as the anode of electrolytic capacitors, and there are mainly the following problems: (1) The titanium anode is ionized from 0-valent elemental titanium to +4-valent Ti 4+ , its ionization energy is very large, so that the oxidation efficiency is very low, and even the oxidation cannot be carried out
(2) Ti and TiO 2 Between, there are a variety of low-valent titanium oxides, such as TiO, Ti 2 o 3 、Ti 3 o 5 etc., so that the anodized layer of Ti is not completely amorphous TiO 2 , but a mixed layer of a variety of low-valent titanium oxides, resulting in TiO 2 The performance of the oxide film decreases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method of manufacturing anode blocks, weighing 100g of titanium monoxide powder (TiO1.00) with an average particle size of 5.4μm for the manufacture of electrolytic capacitor anodes, each 125mg, pressing mold inner diameter: Φ3.5mm, pressing density: 3.0g cm -3 , Sintering temperature: 1150°C, sintering time: 30min, vacuum pressure -1 , Constant pressure time: 2h. The test results of the energized anode are listed in Table 1.

Embodiment 2

[0035] Weigh 100g of titanium monoxide powder (TiO0.85) with an average particle size of 6.5 μm for the manufacture of electrolytic capacitor anodes, the anode energizing method: energizing solution: 1% ammonium pentaborate, energizing voltage Vf: 30V, energizing temperature: 10°C, enabling current density: 30mA·g -1 , Constant pressure time: 2h. The pressing and sintering are the same as in Example 1, and the test results of the energized anode are listed in Table 1.

Embodiment 3

[0037] Weigh 100 g of titanium monoxide powder (TiO1.00) with an average particle size of 5.2 μm for the manufacture of an electrolytic capacitor anode. 125mg each. Anode energization method: Energizing solution: 0.05% Ba(OH) 2 , Enabling voltage Vf: 50V, Enabling temperature: 10℃, Enabling current density: 30mA·g -1 , Constant pressure time: 2h, the pressing and sintering conditions are the same as in Example 1, and the test results of the energized anode are listed in Table 1.

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PUM

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Abstract

The invention relates to the pole of the electrolyzing capacitor, especially the positive pole of the electrolyzing capacitor made of titanium oxide or adulterated titanium oxide, and its producing method. Its character is as follow. Oxygen index range of titanium oxide is more than 0.8 and less than 1.2. The adulterant includes valve metal, one or several kinds of low price oxide of valve metal or their alloy and mixture. The adulterant range is between 0 and 50 wt%. The invention decreases the producing cost, ionization energy and the content of low price titanium oxide in the TiO2 oxide film and increases oxidation rate. The positive pole of the electrolyzing capacitor made of it has high stabilization and high specific votume up to 40000 muF .V .g-1-240000 muF .V .g-1. The creepage current is weak and K is 0.1 muA . muF-1 . V-10.005 muA . muF-1 .V-1.

Description

Technical field: [0001] The present invention relates to electrodes for electrolytic capacitors, especially electrolytic capacitor anodes made of titanium monoxide and doped titanium monoxide and methods for their manufacture. Background technique: [0002] With the electronics industry, the demand for electrolytic capacitors has increased dramatically. The anode materials of electrolytic capacitors are constantly updated from aluminum-tantalum-niobium-low-priced niobium oxides. In terms of cost performance, although the price of aluminum electrolytic capacitors is low, its performance can no longer meet the increasingly stringent requirements; tantalum electrolytic capacitors have excellent performance, but their high price limits their wide application in civil fields; Material electrolytic capacitors are in the trial production stage and have not yet been industrialized on a large scale. [0003] Titanium is used as the anode of electrolytic capacitors, and there are ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
Inventor 钟晖宋文杰戴艳阳钟海云岳忠
Owner CENT SOUTH UNIV
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