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Ceramics processing

A technology of ceramic green body and ceramic honeycomb, which is applied in the field of extruding ceramic composition and drying ceramic green body, can solve the problems of deformation or leakage, low mechanical resistance, low adhesion of ceramic skin composition, etc., to reduce leakage and/or deformation effects

Inactive Publication Date: 2019-05-03
IMERTECH SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, common problems that may arise during the processing of ceramic compositions include, for example, cracking of the ceramic material during drying (e.g., due to differential or rapid shrinkage of the ceramic material), warping or deformation of the ceramic material during extrusion, ceramic Deformation or leakage of the cells of the honeycomb after sintering (e.g. due to different degrees of shrinkage of the honeycomb structure and the plugging material used to fill the openings of the cells) and low adhesion, low mechanical resistance or high shrinkage of the ceramic skin composition

Method used

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Embodiment Construction

[0044] drying process

[0045]Provided herein are methods for drying (dewatering) ceramic bodies. In certain embodiments, the method removes at least about 70% by weight of water from the ceramic body. In certain embodiments, the method removes at least about 75% by weight, or at least about 80% by weight, or at least about 85% by weight, or at least about 90% by weight, or at least about 95% by weight, or At least about 96%, or at least about 97%, or at least about 98% by weight water. In certain embodiments, the method removes up to about 90% by weight, or up to about 95% by weight, or up to about 96% by weight, or up to about 97% by weight, or up to about 98% by weight, or up to about 99% or up to about 100% by weight water. For example, the method can remove from about 90% to about 99% by weight of water from the ceramic body.

[0046] In certain embodiments, the method can also remove organic compounds from the ceramic body. For example, the percentage of organic co...

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Abstract

Methods for ceramic processing, for example a method for removing water from a ceramic green body, a method for extruding a ceramic composition, a method of plugging a ceramic honeycomb structure, anda method for coating a ceramic honeycomb structure with a skin composition, and related products.

Description

technical field [0001] The present invention generally relates to the processing of ceramic compositions and the products made by such processes. For example, in one aspect, the invention relates to a method of drying a ceramic body that, for example, reduces differential shrinkage and corresponding cracking of a ceramic composition. In another aspect, the invention relates to a method of extruding a ceramic composition which involves controlling the temperature of different regions of the ceramic composition such that the regions have different temperatures before and / or during extrusion. In certain embodiments, this allows for a substantially uniform flow of the ceramic composition, thereby reducing bowing of the extruded ceramic composition. In yet another aspect, there is provided a use of a plugging composition to fill openings of one or more cells of a ceramic honeycomb structure, wherein the plugging composition has a sintering shrinkage equal to that of the ceramic ho...

Claims

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Application Information

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IPC IPC(8): C04B35/00C04B38/00
CPCC04B35/00C04B38/0006C04B2235/606C04B38/0009C04B38/0012C04B2235/6021C04B2235/616
Inventor I·F·吉梅内斯R·佩尔J·D·R·阿尔瓦雷兹M·冈萨雷斯·卡斯特罗P·G·佩雷兹
Owner IMERTECH SAS
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