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Production method of fused alumina/titanium oxide composite material

A composite material and production method technology, applied in the field of production of fused alumina/titanium oxide composite materials, can solve problems such as low strength, easy decomposition, and limited use, and achieve high mechanical strength, low porosity, and improved service life Effect

Inactive Publication Date: 2018-05-18
SHANDONG LEIBAO ZIRCONIUM SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, when domestically preparing sintered dense alumina / titania, alumina and titania are made into blanks according to a certain ratio, put into a high-temperature kiln, and sintered at about 1500 ° C. The sintered materials are used When it is low temperature, it is easy to decompose and has low strength, so it is limited in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using high-purity oxides (Al 2 o 3 ≥99.5wt%, TiO 2 ≥98.5wt%) as raw materials, 59% of aluminum oxide and 41% of titanium oxide are mixed into charge according to the weight ratio. The charge is put into the three-phase electric arc furnace in batches for smelting, the control electrode is lifted to maintain a long arc (1cm, but not in contact), the melt is gradually fed at 2400°C, the secondary voltage (electrode voltage) is 100 volts, and the current is 200 An, and the melt was kept warm for another 60 minutes (insulation current 200 A). Then add material, reheat, and then keep warm, and repeat the above process for many times until a frit with a diameter of 500mm is obtained. The frit is broken according to the conventional method, and then made into the required particle size. The frit is crushed by a closed mechanical crushing method to avoid the introduction of other impurities.

[0025] The alumina content of the finished fused alumina / titania composite mater...

Embodiment 2

[0027] Using high-purity oxides (Al 2 o 3 ≥99.5wt%, TiO 2 ≥98.5wt%) as raw materials, 62% of aluminum oxide and 38% of titanium oxide are mixed into charge according to the weight ratio. The charge is put into the three-phase electric arc furnace in batches for smelting, the control electrode is lifted to maintain a long arc (1.5cm, but not in contact), the melt is gradually fed at 2450 ° C, the secondary voltage (electrode voltage) is 120 volts, and the current is 1100 amps, and the melt was kept warm for another 40 minutes (holding current 260 amps). Then add material, reheat, and then keep warm, and repeat the above process for many times until a frit with a diameter of 500mm is obtained. The frit is broken according to the conventional method, and then made into the required particle size. The frit is crushed by a closed mechanical crushing method to avoid the introduction of other impurities.

[0028] The alumina content of the finished fused alumina / titania composit...

Embodiment 3

[0030] Using high-purity oxides (Al 2 o 3 ≥99.5wt%, TiO 2 ≥98.5wt%) as raw materials, 59.5% of aluminum oxide and 40.5% of titanium oxide are mixed into charge according to the weight ratio. The charge is put into the three-phase electric arc furnace in batches for smelting, the control electrode is lifted to maintain a long arc (0.8cm, but not in contact), the melt is gradually fed at 2450°C, the secondary voltage (electrode voltage) is 120 volts, and the current is 2000 amps, and the melt was kept warm for another 20 minutes (holding current 270 amps). Then add material, reheat, and then keep warm, and repeat the above process many times until a frit with a diameter of about 500mm is obtained. The frit is broken according to the conventional method, and then made into the required particle size. The frit is crushed by a closed mechanical crushing method to avoid the introduction of other impurities.

[0031] The finished alumina / titanium oxide composite material has a c...

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Abstract

The invention relates to a production method of a refractory material and a thermal spraying material, in particular to a production method of a fused alumina / titanium oxide composite material. According to the production method of the fused alumina / titanium oxide composite material, high-purity Al2O3 and high-purity TiO2 serves as molten materials for high-temperature electric arc melting, an electrode is controlled not to make contact with a melting surface, the distance between the electrode and the melting surface is larger than 0 cm and smaller than or equal to 2 cm, and a low-carbon black crystal frit is formed through natural cooling after high-temperature electric arc melting and crushed into grain-size sand. Electric arcs are used for long-arc operation, the electrode is preventedfrom making contact with oxidized powder, and introduction of carbon is avoided; produced alumina is high in purity, low in porosity, high in volume density, high in high-temperature strength and abrasion resistance and good in corrosion resistance and high-temperature volume stability, can be widely applied in the thermal spraying industry, is beneficial to obtaining better thermal spraying equipment and accessories, and prolongs the service life of the equipment and the accessories.

Description

technical field [0001] The invention relates to a production method of a refractory material and a thermal spraying material, in particular to a production method of an electric fused alumina / titanium oxide composite material. Background technique [0002] At present, when domestically preparing sintered dense alumina / titania, alumina and titania are made into blanks according to a certain ratio, put into a high-temperature kiln, and sintered at about 1500 ° C. The sintered materials are used When used, it is easy to decompose at low temperature and has low strength, so it is limited in use. Contents of the invention [0003] The purpose of the present invention is to provide a production method of electrofused alumina / titania composite material, which is produced by electrofusion method, has high purity, low porosity, high mechanical strength and good quality stability. [0004] The production method of the fused alumina / titania composite material of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/05
CPCC04B35/05C04B2235/3232C04B2235/77C04B2235/9607C04B2235/666
Inventor 王光强刘学燕周有福王育峰韩雍雍
Owner SHANDONG LEIBAO ZIRCONIUM SCI&TECH
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