Aluminum titanate porous ceramic, preparation method thereof and porous medium burner

A technology of porous ceramics and aluminum titanate, which is used in burners, ceramic products, gas fuel burners, etc., can solve problems such as poor thermal shock resistance at high temperature

Inactive Publication Date: 2021-05-11
SONGSHAN LAKE MATERIALS LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides an aluminum titanate porous ceramic and its preparation method as well as a porous media burner, which can improve the poor high-temperature thermal shock resistance of existing aluminum titanate porous ceramics

Method used

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  • Aluminum titanate porous ceramic, preparation method thereof and porous medium burner
  • Aluminum titanate porous ceramic, preparation method thereof and porous medium burner
  • Aluminum titanate porous ceramic, preparation method thereof and porous medium burner

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preparation example Construction

[0033] In the second aspect, the embodiment of the present application provides a method for preparing the aluminum titanate porous ceramic according to the embodiment of the first aspect, comprising: immersing the foamed plastic with pores in the slurry of the raw material, and making the skeleton surface of the foamed plastic coated with slurry , dry and solidify after hanging the slurry, and then sinter to shape after pyrolysis.

[0034]The foamed plastics with pores are dried and solidified after hanging the slurry, so that the slurry is cured on the surface of the foamed plastics skeleton, and the adhesive is cured after pyrolysis to make the Al 2 o 3 、TiO 2 It is consolidated with the stabilizer and the foamed plastic is decomposed at the same time, the pores of the foamed plastic correspond to the pores of the aluminum titanate porous ceramic, so that the porosity of the prepared aluminum titanate foamed ceramic is relatively high. Optionally, the foam plastic in the ...

Embodiment 1

[0051] This embodiment provides an aluminum titanate porous ceramic, the raw material of which includes: calcined α-Al 2 o 3 powder (D50=1μm) 2.5kg, anatase type titanium dioxide (D50=0.3μm) 2.5kg, magnesium oxide powder (D50=0.5μm) 150g, ferric oxide (analytical pure) 11.5g, lanthanum oxide (analytical Pure) 20g, phenolic resin 1kg, Tween 20 of 10g, ethanol 1600g and butanone 400g.

[0052] The preparation method of the aluminum titanate porous ceramic of the present embodiment comprises:

[0053] Put the above raw materials in a ball mill tank for 4 hours to prepare a slurry, cut the polyurethane sponge into 300mmx300mmx25mm, dip the sponge into the slurry, take it out and centrifuge, shake off the excess slurry, and use compressed air to hang the precursor on the The slurry is evenly purged, and the compressed air pressure is 0.3MPa. Place the polyurethane sponge after slurrying in an oven to dry and solidify at 100°C, repeat the process of dipping, centrifuging, purging...

Embodiment 2

[0055] This embodiment provides an aluminum titanate porous ceramic, the raw material of which includes: calcined α-Al 2 o 3 powder (D50=2μm) 3kg, rutile titanium dioxide (D50=0.5μm) 2kg, magnesite powder (D50=2μm) 350g, ferric oxide (analytical pure) 15g, lanthanum oxide (analytical pure) 40g, phenolic Resin 1.2kg, castor oil 20g, ethanol 1500g and butanone 500g.

[0056] The preparation method of the aluminum titanate porous ceramic of the present embodiment comprises:

[0057] Put the above raw materials in a ball mill tank for 5 hours to prepare a slurry, cut the polyurethane sponge into 140mmx290mmx25mm, dip the polyurethane sponge into the slurry, take it out and centrifuge, shake off the excess slurry, and hang the precursor with compressed air The slurry is blown evenly, and the compressed air pressure is 0.6MPa. Put the slurry-coated polyurethane sponge in an oven to dry and solidify at 120°C, repeat the process of dipping, centrifuging, purging, and drying and cur...

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Abstract

The invention discloses aluminum titanate porous ceramic, a preparation method thereof and a porous medium burner, and belongs to the technical field of ceramic. The aluminum titanate porous ceramic is prepared from slurry of raw materials through pyrolysis and sintering molding, and the raw materials comprise Al2O3, TiO2, a stabilizer, an adhesive, a dispersing agent and a solvent used for dissolving the adhesive, wherein the weight ratio of the Al2O3 to the TiO2 to the stabilizer is (50-70): (30-50): (1-10), and the stabilizer is at least one selected from the group consisting of magnesium oxide, magnesium carbonate, silicon dioxide, ferric oxide, cerium oxide, lanthanum oxide and yttrium oxide. The preparation method comprises the following steps of: immersing foamed plastic with pores into slurry of raw materials, coating the surface of the foamed plastic with slurry, drying and curing after coating, and sintering and molding after pyrolysis. The problem that existing aluminum titanate porous ceramic is poor in thermal shock resistance can be solved.

Description

technical field [0001] The present application relates to the technical field of ceramics, in particular, to an aluminum titanate porous ceramic, a preparation method thereof, and a porous media burner. Background technique [0002] Aluminum titanate porous ceramics and cordierite ceramics are well-known low thermal expansion ceramic materials, among which aluminum titanate porous ceramics have better high temperature resistance (melting point reaches 1860 ° C), small thermal expansion coefficient, excellent thermal shock resistance, It is widely used in metal smelting, automobile industry and refractory materials due to its excellent corrosion resistance and high temperature and non-wetting characteristics of molten metal. [0003] However, aluminum titanate porous ceramics have the following disadvantages: it is easy to decompose into alumina and titanium dioxide in the middle and high temperature stage (800-1300 ° C), resulting in a sharp increase in thermal expansion coe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478F23D14/14C04B38/06
CPCC04B35/478F23D14/14C04B38/0615C04B2235/3206C04B2235/442C04B2235/3418C04B2235/3272C04B2235/3229C04B2235/3227C04B2235/3225C04B2235/6562C04B2235/6567C04B2235/96
Inventor 付超吴泽霖任志恒孔凡磊王乃豪钱志强战斗朱凯
Owner SONGSHAN LAKE MATERIALS LAB
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