Method for adjusting firing shrinkage of cordierite honeycomb ceramics by using amorphous silicon micropowder

A technology of cordierite honeycomb and shrinkage rate, which is applied in the field of manufacturing special ceramics, can solve problems such as large internal stress and product cracking, and achieve the effect of alleviating firing shrinkage and improving firing pass rate

Inactive Publication Date: 2012-12-12
李少荣
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the molding process in this process can only use mine raw materials whose crystal structure is not destroyed, and in order to make the raw materials oriented, the particle size of the raw materials must be fine enough. The large shrinkage will cause a large internal stress in the product during the firing process, which will cause the product to crack. Usually, domestic manufacturers use this raw material one-time molding process to produce, and the cracking rate of the product is between 60-90%. Therefore, domestic Basically no manufacturer dares to use this process for production

Method used

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  • Method for adjusting firing shrinkage of cordierite honeycomb ceramics by using amorphous silicon micropowder
  • Method for adjusting firing shrinkage of cordierite honeycomb ceramics by using amorphous silicon micropowder
  • Method for adjusting firing shrinkage of cordierite honeycomb ceramics by using amorphous silicon micropowder

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Experimental program
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Embodiment 1

[0015] The production test process route of the product is: batching→mixing→kneading→sliming→shaping→drying→processing→firing.

[0016] Use an electronic scale with an accuracy of 10g to weigh and weigh various raw materials according to the following ratios for batching operations:

[0017]

[0018] ※Extra: Refers to the inorganic main raw material as 100%, and a certain proportion of auxiliary raw materials added.

[0019] The specific process is as follows: add the weighed inorganic main raw materials and the added powder binder together into the powder mixer and mix for 45 minutes, so that all kinds of powder raw materials are fully mixed evenly. Pour the mixed powder raw materials into the kneader, and evenly spray the prepared blending liquid (dissolving the dispersant and lubricant in water) into the powder raw materials while turning on the kneader. After 120 After 10 minutes of kneading, the powder raw materials are kneaded into plastic lumps. The mud block is ta...

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Abstract

The invention relates to a method for adjusting firing shrinkage of cordierite honeycomb ceramics by using amorphous silicon micropowder. Natural amorphous silicon dioxide used as a raw material is introduced into the production formula of cordierite honeycomb ceramics. The method comprises the following steps: adding an adhesive and a blending solution into kaolin, talcum, aluminum oxide and silicon dioxide which are used as inorganic main raw materials; and proportioning, mixing, kneading, sludging, forming, drying, processing and firing to adjust the firing shrinkage of the cordierite honeycomb ceramics. A certain amount of natural amorphous silicon dioxide raw material is introduced into the production formula of cordierite honeycomb ceramics to well solve the problem of firing shrinkage of the product in the firing process, thereby greatly enhancing the firing qualification rate of the product.

Description

technical field [0001] The invention relates to the field of manufacturing special ceramics, in particular to a method for adjusting the firing shrinkage rate of cordierite honeycomb ceramics by using amorphous silicon micropowder. Background technique [0002] Cordierite honeycomb ceramic carrier, with its porous, light weight, low expansion, high strength and other characteristics, has basically monopolized the market of catalyst carriers for three-way catalytic converters for automobile exhaust. Therefore, for a long time, people have been doing various researches to improve the quality of cordierite, especially in reducing the thermal expansion coefficient of cordierite, so as to improve the thermal shock resistance of cordierite honeycomb ceramic carrier. [0003] Since Corning Corporation of the United States proposed in the 1870s, by aligning the C-axis of the cordierite crystal in the molding direction of the honeycomb ceramic carrier, the thermal expansion coefficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/63
Inventor 彭红李少荣
Owner 李少荣
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