Ceramic electrode material and process for producing the ceramic electrode material

A technology of ceramic electrodes and manufacturing methods, which can be applied to ceramic products, cable/conductor manufacturing, electrodes, etc., and can solve problems such as remaining problems in processability

Inactive Publication Date: 2011-09-21
NAGOYA INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a means to solve the above-mentioned problems, it has been proposed so far: (1) the development of alloys (for example, Ni-Ti alloys (Patent Document 1), rare earth-containing alloys of elements (Patent Document 2), stainless steel (Patent Document 3)), (2) plating noble metal elements (for example, forming a platinum layer on a Ti alloy (Patent Document 4)), (3) coating metal electrodes with a resinous film (For example, coating an insulating film on a platinum wire (Patent Document 5)) and other technologies, but there are still problems in terms of factors other than corrosion resistance, such as processability and economical efficiency.

Method used

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  • Ceramic electrode material and process for producing the ceramic electrode material
  • Ceramic electrode material and process for producing the ceramic electrode material
  • Ceramic electrode material and process for producing the ceramic electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] First, alumina powder (Sinterable alumina manufactured by Showa Denko Co., Ltd., AL-160SG-4, average particle size: 0.6 μm) as a ceramic raw material, methacrylamide as a polymerizable substance, and N, N'-methylene bisacrylamide as a dispersant, ammonium polycarboxylate dispersant (CELUNAD305, manufactured by Chukyo Oil & Fat Co., Ltd.) and distilled water as a dispersant. Blending was carried out to prepare a water slurry composition. In addition, the preparation of the composition was carried out as follows: First, methacrylamide and N,N'-methylenebisacrylamide were dissolved in distilled water, then polycarboxylate ammonium-based dispersant was added, and then After the alumina powder was prepared, it was mixed for 25 hours in a constant temperature water tank set at 25° C. using a wet ball mill.

[0072] [Table 1]

[0073] Slurry composition table (combined amount relative to 100g of slurry)

[0074]

Alumina powder

distilled water

Dispersant...

experiment example

[0080] After adding 1.03 mg of a polymerization initiator and 0.17 mg of a polymerization catalyst to 100 g of the above composition, an appropriate amount of the composition to which the above polymerization initiator was added was supplied to a disc-shaped (diameter 5 cm x thickness 1 cm) molding die . The methacrylamide and N,N'-methylenebisacrylamide contained in the composition were polymerized by leaving these molding dies in a room (temperature: 25° C.) for 3.0 hours, and then by removing them from the molding dies, mold to obtain a disc-shaped molded body.

[0081] The obtained molded article was placed in a room of a constant humidity dryer, and dried for 3 days until the relative humidity in the room was lowered from 90% RH to 60% RH at a rate of 10% RH per day. After the drying, the dried molded body was reduced and fired at a temperature of 1700° C. for 2 hours while introducing argon gas using a small electric furnace set in an argon atmosphere to obtain a cerami...

Embodiment 2

[0094] First, alumina powder (Sinterable alumina manufactured by Showa Denko Co., Ltd., AL-160SG-4, average particle size: 0.6 μm) as a ceramic raw material, methacrylamide as a polymerizable substance, and N, N'-methylenebisacrylamide as a permanent monomer, ammonium polycarboxylate dispersant (CELUNAD305, manufactured by Chukyo Oil & Fat Co., Ltd.) as a dispersant, and distilled water. Blending was carried out to prepare a water slurry composition. In addition, the preparation of the composition was carried out as follows: First, methacrylamide and N,N'-methylenebisacrylamide were dissolved in distilled water, then polycarboxylate ammonium-based dispersant was added, and then After adding the alumina powder, the mixture was mixed for 25 hours in a constant temperature water tank set at 25° C. using a wet ball mill.

[0095] [Table 4]

[0096] Slurry composition table (combined amount relative to 100g of slurry)

[0097]

Alumina powder

distilled water

...

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Abstract

Disclosed is a ceramic material that has proper electrical conductivity and high corrosion resistance as an electrode material. Also disclosed is a process for producing the corrosion resistant ceramic electrode material in a good workable and economical manner. According to the process, a molded product gelled by polymerizing a polymerizable monomer, which has been previously added to a ceramic slurry, is fired in a reducing atmosphere after drying and degreasing thereof, whereby a corrosion resistant ceramic electrode material including three-dimensional net-like electrically-conducting paths that are formed of a reduction fired product of a polymer compound having carbon atoms among ceramic particles can be provided.

Description

technical field [0001] The present invention relates to a corrosion-resistant and conductive ceramic electrode material that can be used as an electrode material and a method for producing the same. Background technique [0002] In various industries that utilize electrochemical reactions, such as the electrolysis industry to the fuel cell industry that has been continuously developed in recent years, the raw materials of the electrode materials used are of course required to have electrical conductivity. Corrosion resistance in the presence of liquids. For example, electrode corrosion under severe acid and alkaline conditions is a problem in seawater electrolysis or soda electrolysis, or electrode corrosion caused by carbon monoxide in raw material hydrogen obtained by a modification reaction in a fuel cell cell is a problem . [0003] As means for solving the above-mentioned problems, it has been proposed so far: (1) Development of alloys (for example, Ni-Ti alloys (Pate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/18B01J23/755C04B35/00C04B38/06C04B41/85C04B41/88C25B11/04C25B11/06C25B11/12H01B13/00H01M4/86H01M4/88H01M4/96H01M8/02H01M8/10
CPCC04B2235/652C04B35/63468H01M4/90H01M4/8605C04B35/488C04B38/10Y02E60/50C04B2235/606C04B2235/422C04B2235/6023C04B2235/80H01M2008/1095C04B2235/77C04B35/14C04B2235/96C04B35/117C04B2235/48C25B11/0478H01M4/92C25B11/091C04B35/185C04B35/48C04B35/56C04B35/58
Inventor 藤正督高桥实刘景军渡边秀夫白井孝
Owner NAGOYA INSTITUTE OF TECHNOLOGY
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