Aluminum titanate ceramic for casting and preparation method thereof

A technology of aluminum titanate and ceramics, which is applied in the field of aluminum titanate ceramics for casting and its preparation, and achieves the effects of saving energy consumption, saving production costs and simplifying processes

Pending Publication Date: 2021-01-29
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic aluminum titanate ceramic risers are mostly prepared by a two-step method, but there are few research and application reports on direct one-step production.

Method used

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  • Aluminum titanate ceramic for casting and preparation method thereof
  • Aluminum titanate ceramic for casting and preparation method thereof
  • Aluminum titanate ceramic for casting and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing aluminum titanate ceramics for casting, wherein the raw materials and proportions for making the aluminum titanate ceramics are: α-Al 2 o 3 54.34wt%, titanium yellow powder 42.72wt%, magnesium carbonate 1.94wt%, silicon dioxide 1wt%; the steps of its manufacture are:

[0027] (1) Raw material treatment: α-Al with ball milling fineness of 200 mesh 2 o 3 , titanium yellow powder, magnesium carbonate, silicon dioxide raw materials.

[0028] (2) Mixing of raw materials: mix according to the proportion of each raw material, and use a planetary ball mill for ball milling for 12 hours at a speed of 400r / min to obtain a slurry; the mixing of the above raw materials is made by wet ball milling, and the ball milling medium used is none Water ethanol, the ball mill is a zirconia ceramic ball mill, and the mass ratio of the raw material, ball mill and alcohol is 1:3:1.25.

[0029] (3) Granulation: Pour the slurry into a container and dry it in an electric...

Embodiment 2

[0035] A method for preparing aluminum titanate ceramics for casting, the raw material and the proportion thereof for making the green body are: α-Al 2 o 3 58.22wt%, titanium yellow powder 38.78wt%, magnesium carbonate 1.5wt%, silicon dioxide 1.5wt%; the steps of its manufacture are:

[0036] (1) Raw material treatment: α-Al with ball milling fineness of 200 mesh 2 o 3 , titanium yellow powder, magnesium carbonate, silicon dioxide raw materials.

[0037] (2) Mixing of raw materials: mix according to the proportion of each raw material, and use a planetary ball mill for ball milling for 12 hours at a speed of 400r / min to obtain a slurry; the mixing of the above raw materials is made by wet ball milling, and the ball milling medium used is none Water ethanol, the ball mill is a zirconia ceramic ball mill, and the mass ratio of the raw material, ball mill and alcohol is 1:3:1.25.

[0038] (3) Granulation: Pour the slurry into a container and dry it in an electric blast drying...

Embodiment 3

[0044] A method for preparing aluminum titanate ceramics for casting, the raw material and the proportion thereof for making the green body are: α-Al 2 o 3 56.42wt%, titanium yellow powder 37.58wt%, magnesium carbonate 5wt%, silicon dioxide 1wt%; The steps of its manufacture are:

[0045] (1) Raw material treatment: α-Al with ball milling fineness of 200 mesh 2 o 3 , titanium yellow powder, magnesium carbonate, silicon dioxide raw materials.

[0046] (2) Mixing of raw materials: mix according to the proportion of each raw material, and use a planetary ball mill for ball milling for 12 hours at a speed of 400r / min to obtain a slurry; the mixing of the above raw materials is made by wet ball milling, and the ball milling medium used is none Water ethanol, the ball mill is a zirconia ceramic ball mill, and the mass ratio of the raw material, ball mill and alcohol is 1:3:1.25.

[0047] (3) Granulation: Pour the slurry into a container and dry it in an electric blast drying ove...

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Abstract

The invention relates to an aluminum titanate ceramic for casting and a preparation method thereof, alpha-Al2O3 and titanium yellow powder are used as raw materials, magnesium carbonate and silicon dioxide are added as stabilizers, the components of the raw materials are as follows: 53-59 wt% of alpha-Al2O3, 37.58-42.72 wt% of titanium yellow powder and 3-6 wt% of the total amount of the stabilizers, and the raw materials are subjected to wet ball milling mixing, granulation, isostatic cool pressing and firing to obtain the aluminum titanate ceramic. The aluminum titanate material is directlyprepared by adopting a one-step method so that the preparation process is simplified, the production cost is greatly saved, the economic benefit is good, and meanwhile, the prepared material is high in mechanical strength and low in thermal expansion coefficient, and can be used for preparing products such as riser tubes and crucibles for casting.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to an aluminum titanate ceramic for casting and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, especially the rise of automobile and aviation industries, the demand for ceramic materials with excellent high temperature resistance and thermal shock resistance is becoming more and more urgent. Aluminum titanate (Al 2 TiO 5 ) is a new type of material integrating low expansion coefficient and high melting point. It has the advantages of excellent thermal shock resistance, slag resistance, corrosion resistance, and non-wetting to various metals. It has low thermal expansion coefficient and excellent thermal shock resistance. The performance makes it widely used in glass, automobile, thermal processing industry and other fields, such as catalyst carrier, exhaust pipe, internal combustion engine heat insulation, met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478C04B35/622
CPCC04B35/478C04B35/622C04B2235/6562C04B2235/6567C04B2235/661C04B2235/77C04B2235/96C04B2235/9607
Inventor 黄学辉陈微程之勇谭立新寇连星李晓博李杰康
Owner WUHAN UNIV OF TECH
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