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Method for preparing low-expansion aluminium titanates ceramic catheter

An aluminum titanate and catheter technology, which is applied in the field of preparation of aluminum titanate ceramic catheters, can solve the problems of uneven product microstructure, poor product matching dimensional accuracy, large equipment investment, etc., and achieves microstructure Uniform organization, small labor workload, and good thermal stability

Inactive Publication Date: 2008-02-06
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the influence of various ingredients and preparation processes, the existing aluminum titanate ceramic catheters cannot meet this requirement well. There are many existing molding methods, and most of them are isostatic pressing molding methods and The grouting molding method and the isostatic pressing molding method have disadvantages such as large equipment investment, complicated process, and high labor intensity; the grouting molding method has disadvantages such as uneven product microstructure, poor reliability, and poor product matching dimensional accuracy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The ingredient weight of synthetic aluminum titanate ceramics is divided into:

[0032] 48% of aluminum oxide, 41% of titanium dioxide, and 11% of additives, wherein the weight composition of the additives is: magnesia spinel 18%, basic magnesium carbonate 64%, cordierite 9%, and mullite 9%.

[0033] The above powders are mixed, mixed uniformly, and then synthesized at a temperature of 1320° C., and ball milled to a particle size below 3 μm (that is, the maximum particle size is 3 μm) to obtain aluminum titanate ceramic powder for use.

[0034] The weight percent of the organic solution is divided into:

[0035] Organic monomer 12%, distilled water 88%, the weight composition of organic monomer is N,N-methylene acrylamide 2%, acrylamide 98%;

[0036] In the weight composition of the forming slurry, 87% aluminum titanate ceramic powder, 12.3% organic solution, and 0.7% dispersant are prepared into aluminum titanate ceramic slurry in a ball mill.

[0037] The dispersant is a ...

Embodiment 2

[0043] The ingredient weight of synthetic aluminum titanate ceramics is divided into:

[0044] 47.0% of aluminum oxide, 43.0% of titanium dioxide and 10% of additives, wherein the additive is basic magnesium carbonate.

[0045] The above-mentioned powders are mixed, mixed uniformly, and then synthesized at a temperature of 1460° C. to synthesize aluminum titanate ceramics, and milled to a particle size below 3 μm to obtain aluminum titanate ceramic powders for use.

[0046] The weight percent of the organic solution is divided into:

[0047] Organic monomer 5%, distilled water 95%, the weight composition of organic monomer is N,N-methylene acrylamide 3% and acrylamide 97%;

[0048] In the weight composition of the forming slurry, 87% aluminum titanate ceramic powder, 12.4% organic solution, and 0.6% dispersant; the aluminum titanate ceramic slurry is prepared in a ball mill.

[0049] The dispersant adopts ammonium polyacrylate solution with a weight concentration of 40%;

[0050] ...

Embodiment 3

[0054] Example 3. The ingredients of synthetic aluminum titanate ceramics are divided into 100 groups by weight:

[0055] It is composed of 53% aluminum oxide, 42% titanium dioxide and 5% additive. The additive is cordierite.

[0056] Mix the above powders uniformly, synthesize aluminum titanate ceramics at a temperature of 1350°C, and grind them to a particle size below 3 μm to obtain aluminum titanate ceramic powders for use.

[0057] The weight percent of the organic solution becomes:

[0058]Organic monomer 40%, distilled water 60%, the weight composition of organic monomer is N,N-methylene acrylamide 1%, acrylamide 99%;

[0059] In the weight composition of the forming slurry, 82% aluminum titanate ceramic powder, 17.8% organic solution, and 0.2% dispersant are prepared into aluminum titanate ceramic slurry in a ball mill.

[0060] The dispersant adopts ammonium polyacrylate solution with a weight concentration of 50%;

[0061] The pH adjuster adopts ammonia water with a weig...

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Abstract

The invention relates to a preparation method of a low expansion alumina titanate ceramics delivery tube. Firstly, alumina titanate ceramics is composed, made into powder, gel cast and heated, thus the alumina titanate ceramics delivery tube is obtained. The weight percentages composition of composite materials of the alumina titanate ceramics are that: 31.78 to 53.1 percent of alumina, 32.82 to 46.9 percent of titanium dioxide and 0 to 30 percent of additive zero to thirty percent, wherein the weight compositions of the additive are that: 0 to 30 percent of porzite, 0 to 30 percent of magnesia-alumina spinel, 0 to 40 percent of dichroite and 0 to 100 percent of light magnesium carbonate. The alumina titanate ceramics delivery tube made of the completely novel ingredients has a small thermal expansion coefficient, good thermal stability can meet using needs. The gel-casting method adopted is simple in process, convenient in operation, short in production period, small in working amount and thermal expansion coefficient, high in working efficiency, high in green strength, high in rate of finished products and good in product performance, even in microstructure tissue, good in thermal stability, high in precision of product matched size, and is suitable for the production of products with complicated shape and large size and is particularly suited to manufacturing production.

Description

Technical field [0001] The invention relates to a method for preparing an aluminum titanate ceramic catheter, and belongs to the technical field of special ceramic preparation. Background technique [0002] The aluminum titanate ceramic catheter is a ceramic component used in the aluminum alloy injection machine, and its function is to transport the aluminum alloy melt to the mold of the aluminum alloy injection machine through the aluminum titanate ceramic catheter. Because the aluminum alloy melt frequently travels to and from the ceramic catheter when the aluminum alloy injection machine is working, the ceramic catheter is required to withstand severe thermal shock, with a small thermal expansion coefficient and good thermal stability. [0003] Due to the various influences of ingredients and preparation processes, the existing aluminum titanate ceramic catheters cannot meet this requirement well. There are many existing molding methods, most of which are isostatic pressing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/478C04B35/622
Inventor 唐竹兴田贵山
Owner SHANDONG UNIV OF TECH
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