Alumina titanate ceramica lift tube preparation method

A technology of aluminum titanate and liquid riser is applied in the field of preparation of ceramic materials to achieve the effect of low price

Inactive Publication Date: 2009-02-04
DONGYING XINKEXINTETAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether the actual application of this technology can be industrialized, and how the application effect will be discussed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, (1) Preparation of aluminum titanate synthetic material, including (1) raw materials used in parts by weight are: alumina powder 40, titanium oxide powder 50, and stabilizer 10 of magnesium oxide and silicon dioxide mixed in equal proportions , (2) preparation step and technological condition are: first above-mentioned raw material and the water of 80 weight parts are carried out wet method ball milling slurrying, and the ball milling time is 20 hours, and the slurry particle diameter of 2.5 microns is detected by grinding; After granulation, make a powder with a particle size of 60 mesh and a water content of 1.2%; thirdly, fire titanic acid at a firing temperature of 1400°C, a firing time of 20 hours, and a firing atmosphere of oxidizing atmosphere and heat preservation for 3 hours. Aluminum composite. (2) The preparation of the aluminum titanate ceramic riser, including (1) the parts by weight of raw materials used are: alumina powder 40, titanium oxide po...

Embodiment 2

[0018] Example 2, (1) the preparation of aluminum titanate synthetic material, including (1) the weight parts of raw materials used are respectively: aluminum oxide powder 55, titanium oxide powder 35 and stabilizer 10, the stabilizer here is magnesium oxide, two One or several combinations in equal proportions of silicon oxide, ferric oxide and chromium dioxide; (2) The preparation steps and process conditions are as follows: first, the above-mentioned raw materials and 90 parts by weight of water are subjected to wet ball milling, ball milling The time is 26 hours, and the particle size of the slurry is 2.8 microns after grinding; the second is that the slurry is granulated to make a powder with a particle size of 40 mesh to 80 mesh and a water content of 1.82%; the third is at a firing temperature of 1300 ° C The aluminum titanate composite was fired under the conditions of 20 hours of firing time, an oxidizing atmosphere and 2.5 hours of heat preservation. (2) The preparat...

Embodiment 3

[0019] Embodiment 3, on the basis of above-mentioned embodiment 1, the physical and chemical index of described aluminum oxide fine powder is AL 2 o 3 99.7%; SiO 2 0.04%;Na 2 O0.15%; Fe 2 o 3 0.04%, median particle size: 4 microns, true specific gravity: 3.97. Titanium oxide powder is a de-titanium type titanium oxide powder, and its physical and chemical index is TiO 2 Total 98.0%, of which anatase TiO 2 >90%; S≤0.08%; Fe 2 o 3 ≤0.07%. The titanium oxide powder used in the preparation step of the aluminum titanate ceramic liquid riser is the titanium oxide powder that has been pre-fired at 1200°C.

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Abstract

The invention relates to a preparation method of ceramic materials; the raw materials used in the method comprises alumina powder, titanium oxide powder, synthetic material of aluminium titanate and stabilizing agents, wherein, the stabilizing agents comprise magnesium oxide, silica dioxide, ferric oxide, chromium dioxide and zirconium oxide. The conditions of the preparation process are as follows: firstly, the raw material and water carry out ball milling and pulping by a wet method; secondly, the slurry is granulated and dried into powder with the water content to be less than 2 percent; thirdly, isostatic pressing molding is carried out; fourthly, the powder is sintered into a lift tube of aluminium titanate ceramics under the conditions that the sintering temperature is 1,480 to 1,550 DEG C, the sintering time is 20 to 30 hours and the sintering atmosphere is oxidizing atmosphere; wherein, alumina powder, titanium oxide powder, stabilizing agents and water carry out ball milling and pulping by the wet method and granulation to prepare particle size, then the synthetic material of aluminium titanate is prepared by sintering. The product prepared by the method is characterized by low price, non-infiltration of alumina melt, no reaction, high intensity, strong thermal shock resistant capability, no slag during the using process, long service life, etc.

Description

Technical field: [0001] The invention relates to a preparation method of a ceramic material. The aluminum titanate ceramic riser pipe prepared by the method is mainly used in the production of high-quality safety structural parts (such as: wheel hubs, driving parts, etc.) and engine structural parts (especially automobiles, motorcycles, etc.) The key components on the low-pressure casting machine for automotive parts). Background technique: [0002] The aluminum titanate ceramic riser is a key component used in the manufacture of aluminum alloy products (especially parts for automobiles and motorcycles) on low-pressure casting machines. During casting production, the aluminum titanate ceramic riser is in direct contact with the aluminum alloy solution (temperature is about 700°C), and the aluminum titanate ceramic riser is added to the mold cavity once every 3-5 minutes. Due to the harsh application environment of the ceramic riser and the need for continuous and automatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/66
Inventor 程之勇扈云强任子文
Owner DONGYING XINKEXINTETAO
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