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Iolite cellular ceramic and preparation method

A technology of cordierite honeycomb and ceramics, which is applied in ceramic products, applications, household appliances, etc., and can solve the problems of enterprise-scale preparation processes and large gaps in product performance.

Inactive Publication Date: 2007-10-03
JIANGSU GAOCHUN CERAMICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research and production of honeycomb ceramics in my country started in the early 1980s. Up to now, about 30 factories have produced or are producing honeycomb ceramics, but there is a big gap between the enterprise scale, technical equipment, preparation process and product performance compared with foreign countries.

Method used

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  • Iolite cellular ceramic and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Preparation of cordierite honeycomb ceramics with low thermal expansion and thermal shock resistance

[0019] First, mix water, glycerin, and acrylate multi-polymer in a ratio of 21-23:3-4:1-2 to obtain liquid A; mix polyoxyethylene laurate-2, oleic acid, and linseed oil 1. Light mineral oil is mixed according to the ratio of 1-2:2-3:3-4:2-3 to obtain liquid B; then liquid B is added to liquid A and stirred to obtain a liquid organic raw material additive.

[0020] Preparation of raw meal components: LiO 2 2.0-4% (weight ratio, the same below), talc 37.0% to 41.0% (average particle size 12μm), kaolin 12.0% to 16.0% (particle size ≤ 2μm), calcined kaolin 9.0% to 11.0% (particle size ≤ 2 μm), α-alumina 10.0% to 14.0% (particle size ≤ 2 μm), aluminum hydroxide 13.0% to 15.0% (particle size ≤ 2 μm), silica powder 8.0% to 10.0% (average particle size 9 μm), etc.

[0021] Typically LiO 22.% (weight ratio, the same below), talc 39.0%, average particle size 12 μm,...

Embodiment 2

[0027] Example 2: Preparation of cordierite honeycomb ceramics with high pore density

[0028] The preparation of liquid organic raw material additives, raw material mixing, vacuum mud refining, wet cutting, microwave drying, dry cutting, high-temperature firing, and detection methods are all the same as in Example 1. The differences are as follows:

[0029] The inorganic material for making honeycomb is clinker, and the typical formula of its chemical composition is: LiO 2 2.0 (weight ratio, the same below), SiO 2 50.0%, Al 2 o 3 360%, MgO 13.0%, Fe 2 o 3 0.4%, CaO 0.3%, K 2 O and Na 2 O is 0.09% and the average particle size is 7-9 μm. The composition change area of ​​the present invention is relatively narrow, and the change in the range has no significant change in performance, wherein SiO 2 52.0%, Al 2 o 3 35.0%, MgO 12.0%, and the rest of the ingredients remain unchanged, with no significant changes.

[0030] After the plastic clay is stale for 24 hours,...

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Abstract

A high-porosity thin-wall cordierite-type cellular ceramics is prepared proportionally from LiO2, talc, kaolinite, calcined kaolinite, alpha-AlO, aluminum hydroxide, silicon powder, solid adhesive, and the liquid organic additive prepared from water, propanetriol, liquid adhesive, surfactant and lubricant. Its preparing process is also disclosed.

Description

technical field [0001] The invention mainly relates to a cordierite honeycomb ceramic and a preparation method. technical background [0002] Honeycomb ceramics is a kind of porous industrial ceramics. Inside are many parallel passages in triangular, square or hexagonal shapes. These honeycomb units are divided by thin partition walls. The main material is cordierite (2MgO 2Al 2 o 3 ·5SiO2 2 ), mullite (3Al 2 o 3 2SiO2 2 ), aluminum titanate (Al 2 TiO 5 ), corundum (α-Al 2 o 3 ) and compound equals. Compared with ordinary ceramics, it has the characteristics of low thermal expansion, thermal shock resistance, oxidation resistance, large specific surface area, and corrosion resistance. The products are mainly used as the carrier of automobile exhaust purification catalysts, and also used in high-temperature combustion heat storage bodies, metallurgical and chemical industry tower packing, industrial waste gas treatment, etc. The resea...

Claims

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Application Information

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IPC IPC(8): C04B35/195C04B38/00C04B35/622C04B35/632
Inventor 孔德双孔令仁孔秋明李明明
Owner JIANGSU GAOCHUN CERAMICS
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