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Method for preparing cordierite ceramic by alumina fiber reinforced opoka

A technology of alumina fiber and protein soil, which is applied in the field of inorganic ceramic materials, can solve the problems of high thermal expansion coefficient, low porosity, and low strength, and achieve the effects of improving mechanical strength, reducing sintering temperature, and reducing thermal expansion coefficient

Inactive Publication Date: 2018-12-25
WUHU YUANKUI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing cordierite ceramics from alumina fiber reinforced protein clay, which solves the problems of low porosity, low strength and high thermal expansion coefficient of existing cordierite ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing cordierite ceramics from alumina fiber reinforced protein clay, comprising the following steps:

[0022] (1) According to the ratio of modified protein soil: alumina powder: alumina fiber: magnesia: sintering aid weight ratio 55:25:5:14:1, put the raw materials into the agate ball mill jar, and use a planetary ball mill to 300rpm ball milling for 3 hours to obtain a uniformly mixed powder;

[0023] (2) Then add 10wt% binder of powder, then add deionized water to prepare a ceramic slurry with a solid content of 50%;

[0024] (3) Finally, the paste made is stuffed into a mould, and the molding pressure is 20 MPa, and the powder is pressed and molded by holding the pressure for 2 minutes, and then naturally dried for 24 hours to obtain a ceramic blank;

[0025] (4) Sinter the ceramic blank. The sintering is to slowly heat up to 300°C at a rate of 1°C / min, keep warm for 2 hours, then heat up to 800°C at 2°C / min, keep warm for 2 hours, 5°C / min Rise t...

Embodiment 2

[0030] A method for preparing cordierite ceramics from alumina fiber reinforced protein clay, comprising the following steps:

[0031] (1) According to the ratio of modified protein soil: alumina powder: alumina fiber: magnesia: sintering aid weight ratio 55:25:5:14:1, put the raw materials into the agate ball mill jar, and use a planetary ball mill to 300rpm ball milling for 3 hours to obtain a uniformly mixed powder;

[0032] (2) Then add 10wt% binder of powder, then add deionized water to prepare a ceramic slurry with a solid content of 50%;

[0033] (3) Finally, the paste made is stuffed into a mould, and the molding pressure is 20 MPa, and the powder is pressed and molded by holding the pressure for 2 minutes, and then naturally dried for 24 hours to obtain a ceramic blank;

[0034] (4) Sinter the ceramic blank. The sintering is to slowly heat up to 300°C at a rate of 1°C / min, keep warm for 2 hours, then heat up to 800°C at 2°C / min, keep warm for 2 hours, 5°C / min Rise t...

Embodiment 3

[0039] A method for preparing cordierite ceramics from alumina fiber reinforced protein clay, comprising the following steps:

[0040](1) According to the ratio of modified protein soil: alumina powder: alumina fiber: magnesia: sintering aid weight ratio 55:25:5:14:1, put the raw materials into the agate ball mill jar, and use a planetary ball mill to 300rpm ball milling for 3 hours to obtain a uniformly mixed powder;

[0041] (2) Then add 10wt% binder of powder, then add deionized water to prepare a ceramic slurry with a solid content of 50%;

[0042] (3) Finally, the paste made is stuffed into a mould, and the molding pressure is 20 MPa, and the powder is pressed and molded by holding the pressure for 2 minutes, and then naturally dried for 24 hours to obtain a ceramic blank;

[0043] (4) Sinter the ceramic blank. The sintering is to slowly heat up to 300°C at a rate of 1°C / min, keep warm for 2 hours, then heat up to 800°C at 2°C / min, keep warm for 2 hours, 5°C / min Rise to...

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Abstract

The invention relates to a method for preparing a cordierite ceramic by alumina fiber reinforced opoka. The method includes the steps: (1) placing raw materials including modified opoka, alumina powder, alumina fibers, magnesium oxide and sintering aids according to the weight ratio of 55:25:5:14:1 into an agate jar, and performing ball-milling for 3 hours at the speed of 300rpm by a planetary ball mill to obtain uniformly mixed powder; (2) adding adhesives accounting for 10wt% of the powder, adding deionized water and blending ceramic slurry with the solid content of 50%; (3) plugging prepared paste into a die, dry-pressing the paste by a press machine die under the forming pressure of 20MPa, maintaining the pressure for 2 minutes, pressing the powder and then naturally drying the powderfor 24 hours to obtain a ceramic body; (4) sintering the ceramic body to obtain the cordierite ceramic. Raw steatite, feldspar, kaolin, cerium oxide and titanium dioxide are cleaned and sintered to obtain the sintering aids with excellent performances, the sintering temperature of the cordierite ceramic can be effectively reduced, mechanical strength is improved, and thermal expansion coefficientis reduced.

Description

technical field [0001] The invention relates to a method for preparing cordierite ceramics from alumina fiber reinforced protein soil, which belongs to the field of inorganic ceramic materials. Background technique [0002] Cordierite ceramics have high strength, excellent chemical stability and low thermal expansion, and can be used as the preferred material for the carrier of automobile exhaust processor. Synthetic cordierite powder is the main source of raw materials for cordierite products. Using natural mineral materials, such as talc, kaolin, montmorillonite, etc. as raw materials to synthesize cordierite ceramics and its properties has attracted extensive attention. Synthesis of cordierite from high-purity oxides is the use of high-purity MgO, SiO 2 and Al 2 o 3 The preparation of cordierite by high-temperature solid-phase synthesis reaction is also the most traditional preparation method. This method has the characteristics of high product purity and high synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/80C04B35/622C04B35/626C04B35/64C04B38/08
CPCC04B35/195C04B35/622C04B35/62605C04B35/62675C04B35/64C04B35/803C04B38/08C04B2235/3206C04B2235/3217C04B2235/3229C04B2235/3232C04B2235/3418C04B2235/3463C04B2235/349C04B2235/5224C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C04B38/0074C04B38/0058
Inventor 郭元章波
Owner WUHU YUANKUI NEW MATERIAL TECH CO LTD