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SiC powder and method for producing same, and electrically heated honeycomb structure and method for producing same

A technology of a honeycomb structure and a manufacturing method, which is applied in the directions of ohmic resistance heating, electric heating devices, separation methods, etc., can solve the problems of reducing the strength of the electrode part, etc., and achieve the effects of excellent durability and resistance to rising

Active Publication Date: 2020-12-08
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the average particle diameter of the particles containing silicon carbide contained in the electrode portion exceeds 70 μm, there is a tendency for the strength of the electrode portion to decrease.

Method used

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  • SiC powder and method for producing same, and electrically heated honeycomb structure and method for producing same
  • SiC powder and method for producing same, and electrically heated honeycomb structure and method for producing same
  • SiC powder and method for producing same, and electrically heated honeycomb structure and method for producing same

Examples

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Embodiment

[0157] Hereinafter, examples for better understanding the present invention and its advantages will be illustrated, but the present invention is not limited to the examples.

[0158]

[0159] (SiC fired body 1)

[0160] Prepare D50 as metal silicon powder (density 2.33g / cm2) of 79 μm 3 )74.5g, specific surface area 110m 2 25.5 g of carbon black powder per g, 7.8 g of Ni powder with D50 of 35 μm, and 50 g of water. These materials were mixed with a self-revolving mixer to obtain a mixed powder, which was press-molded to produce a cylindrical molded body of φ25 mm×H15 mm. Next, the obtained molded body was dried at 100° C., and then fired at 1450° C. in an argon atmosphere for 2 hours to obtain a fired body.

[0161] (SiC fired body 2)

[0162] Prepare D50 as metal silicon powder (density 2.33g / cm2) of 79 μm 3 )73.7g, specific surface area 110m 2 26.3 g of carbon black powder per g, 7.7 g of Ni powder with D50 of 35 μm, and 50 g of water. These materials were mixed with...

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Abstract

The invention provides a SiC powder, a method for producing the SiC powder, an electrically heated honeycomb structure, and a method for producing the electrically heated honeycomb structure. The resistivity of the SiC powder is not easily increased over time. The SiC powder contains 70 mass% or more of beta-SiC, and has a D50 of 8-35 [mu] m and a D10 of 5 [mu] m or more in a volume-based cumulative particle size distribution measured by laser diffraction.

Description

technical field [0001] The present invention relates to SiC powder and its manufacturing method. In addition, the present invention relates to a honeycomb structure capable of functioning also as a heater by applying a voltage, and a method for manufacturing the same. Background technique [0002] Conventionally, honeycomb structures made of ceramics have been used as base materials for electrically heated catalytic converters (EHC) for exhaust gas purification, ceramic heaters, and the like. In the above use, the honeycomb structure is heated by connecting metal terminals to a pair of electrode portions of the honeycomb structure and applying a voltage. For example, an EHC is an exhaust purification device installed in an exhaust path of an automobile or the like to purify exhaust gas exhausted from an engine. In this EHC, a catalyst is supported, and by heating the EHC, the catalyst is heated to a temperature required for activation. [0003] Conventionally, there is kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/577C04B35/626C04B35/622C04B38/00H05B3/14B01J27/224B01J32/00B01J35/04F01N3/28B01D46/24
CPCC04B35/565C04B35/6265C04B35/622C04B38/0012H05B3/148B01J27/224F01N3/2828B01D46/2418C04B2235/428C04B2235/402C04B2235/405C04B2235/424C04B2235/404C04B2235/407C04B2235/3481C04B2235/3206C04B2235/5463C04B2235/5436C04B2235/656C04B2235/6567C04B2235/658C04B2235/6583C04B2235/661C04B2235/75B01J35/56C01B32/984C04B35/573C04B35/64C04B35/6365C04B2235/3834C04B2235/549C04B2235/40C04B2235/42C04B2235/725C04B2235/727C04B2235/723C04B2235/663C04B2235/80C04B2235/3891C04B2111/0081C04B2111/00793C04B38/0074C01B32/956C04B2111/00224C01P2004/51C01P2006/16
Inventor 木俣贵文青柳宗一郎山本规介
Owner NGK INSULATORS LTD