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Silicon carbide honeycomb ceramic pug and pugging method

A technology of silicon carbide honeycomb and ceramic mud, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of easy formation of dust, easy precipitation, uneven mixing of stirring powder, etc., to improve the quality and number of channels, The effect of increasing the density and improving the technical indicators

Inactive Publication Date: 2015-09-02
NINGXIA MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: 1. The peak particle size of pure silicon carbide powder used as the skeleton of the honeycomb ceramic pore in the ingredients is single, which is not conducive to the formation of multiple pore diameter channels, and it is impossible to obtain a honeycomb ceramic carrier with a high collection rate
2. The mixing method is easy to form dust, the drum of the mixer is easy to absorb light powder, and the mixing powder is unevenly mixed
3. Flour mixed solution is easy to form agglomeration and easy to precipitate
4. During the stale preservation process, the moisture on the surface of the mud body is easy to volatilize, and the formed hard material particles are easy to block the extrusion die, causing some of the honeycomb ceramic channel walls to be strained or missing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 70 grams of silicon carbide with a particle size of 6-20 μm, 10 grams of silicon carbide with a particle size of 15-40 μm, and 20 grams of silicon carbide with a particle size of 0.5-1.5 μm. Taking the above raw powder as the counterweight base, weigh 4 grams of hydroxypropyl methylcellulose, 6 grams of carbon powder, 20 grams of tung oil, 5 grams of high polymer release agent, 30 grams of water, and 5 grams of glycerin for later use. Mix with water and stir to form glycerol aqueous solution.

[0026] The mud refining steps are as follows:

[0027] 1) Mixing: Add the above-mentioned silicon carbide main materials of three different particle size ranges into the mixer, and stir for 5 minutes to make it evenly mixed;

[0028] 2) After the silicon carbide main ingredients are fully mixed, add the above-mentioned weighed hydroxypropyl methylcellulose and carbon powder and stir for 30 minutes, add tung oil and mold release agent and stir for 40 minutes, then add glyce...

Embodiment 2—4

[0032] On the basis of Example 1, the proportioning relationship of the main material and the auxiliary material is changed as shown in the table below, and the rest of the conditions are unchanged.

[0033] Ratio table of main ingredients Unit: gram

[0034] Example 6-20μm silicon carbide 15-40μm silicon carbide 0.5-1.5μm silicon carbide Example 2 90 4 6 Example 3 86 8 16 Example 4 78 9 13

[0035] Ratio Table of Excipients Unit: Gram

[0036] Example Hydroxypropylmethylcellulose toner Tung oil polyethylene glycol water glycerin Example 2 11 10 4 0.5 15 1 Example 3 8 8 10 3 20 4 Example 4 6 9 15 2 18 3

[0037] The two stale processes in the above mud refining step are to place the mud on a light-proof indoor shelf, keep the indoor temperature at about 25°C, and let the air humidity stand at about 70% for 3 days.

Embodiment 5—6

[0039] On the basis of Example 2, the proportioning relationship of auxiliary materials is changed as shown in the table below, and all the other conditions remain unchanged.

[0040] Ratio Table of Excipients Unit: Gram

[0041] Example binder Porogen lubricant silicone oil water plasticizer Example 5 Methylcellulose: 11 Graphite: 10 Ethanol: 4 0.5 15 Polyol: 1 Example 6 Polyvinyl alcohol: 7 Coal powder: 7 Oil: 8 4 26 Ammonium ethyl methyl sulfate: 4

[0042] The two stale processes in the above mud refining step are to place the mud on a light-proof indoor shelf, keep the indoor temperature at about 20°C, and let the air humidity stand at about 60% for 4 days.

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PUM

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Abstract

The invention relates to a silicon carbide ceramic material, in particular to a silicon carbide honeycomb ceramic pug and a pugging method. Silicon carbide with different grain diameters is adopted as a main material, and then a binder, a pore-forming agent, a lubricating agent, a high polymer release agent, water and a plasticizer are added, after the pugging steps like mixing materials and twice ageing, the pug with high plasticity and high viscidity and used for producing silicon carbide honeycomb ceramics is obtained. According to the silicon carbide honeycomb ceramic pug and the pugging method, provided by the technical scheme of the invention, various technical indices of the produced honeycomb ceramic products are obviously improved when compared with that of the prior art.

Description

Technical field [0001] The invention relates to a silicon carbide ceramic material, in particular to a silicon carbide honeycomb ceramic mud material and a mud refining method. Background technique [0002] Silicon carbide honeycomb ceramics is a new type of ceramic product with a honeycomb-like structure developed in recent years. From the earliest use in the exhaust purification of small cars to today, it is widely used in chemical industry, electric power, metallurgy, petroleum, electronic appliances, machinery and other industries, and it is becoming more and more widely used. Ceramic honeycomb not only has excellent mechanical properties at room temperature, such as high bending strength , excellent oxidation resistance, good corrosion resistance, high wear resistance and low friction coefficient, and high temperature mechanical properties (strength, creep resistance, etc.) are the best among known ceramic materials. Patent application number 200610106781.8, titled "Wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/565
Inventor 姜伟张光荣彭程李晓臣
Owner NINGXIA MACHINERY RES INST
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