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Zirconium-modified aluminum oxide material

A technology of alumina modification, which is applied in the field of alumina material preparation, can solve problems such as poor corrosion resistance and oxidation resistance, shortened service life of alumina materials, and insufficient stability of performance, so as to achieve stable performance and improve oxidation resistance , high hardness and strength

Inactive Publication Date: 2020-10-13
JIANGSU GUOSHENG RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a zirconium-modified alumina material, which solves the problem that the existing alumina material still has cracks in a high-temperature environment for a long time, its performance is not stable enough, and its corrosion resistance and poor oxidation resistance, resulting in shortened service life of alumina materials

Method used

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  • Zirconium-modified aluminum oxide material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] S1. First select 45 parts of alumina, 25 parts of zirconia, 15 parts of deionized water and 8 parts of modifier and put them into the reactor. The modifier is titanate. Start the reactor. The temperature of the reactor is 55°C. The stirring speed of the reactor is 200 rpm, and the stirring time is 25 minutes, and the reactor is evenly stirred for its mixture;

[0028] S2, then choose 3 parts of ferric oxide, 2 parts of chromium oxide, 20 parts of silicon dioxide, 10 parts of rare earth elements, 7 parts of chromium ore, 5 parts of magnesia and 0.6 part of compatibilizer and drop into the reactor, the rare earth elements It is the combination of lanthanum and cerium, the compatibilizer is the combination of magnesium hydroxide and talcum powder, the stirring speed of the reactor is 250 rpm, and the stirring time is 20 minutes. After mixing evenly, finally mix 4 parts of antioxidant and 0.3 part of Put the defoamer into the reactor for mixing, the defoamer is tributyl pho...

Embodiment 2

[0031] S1. First select 40 parts of alumina, 20 parts of zirconia, 10 parts of deionized water and 6 parts of modifier and put them into the reactor. The modifier is phosphate. Start the reactor. The temperature of the reactor is 50°C. The stirring speed of the kettle is 150 rpm, and the stirring time is 20 minutes, and the reaction kettle is evenly stirred for its mixture;

[0032] S2, then choose 2 parts of ferric oxide, 1 part of chromium oxide, 15 parts of silicon dioxide, 8 parts of rare earth elements, 5 parts of chromium ore, 3 parts of magnesia and 0.5 part of compatibilizer and drop into the reactor, the rare earth elements It is yttrium, the compatibilizer is calcium carbonate, the stirring speed of the reactor is 200 rpm, and the stirring time is 15 minutes. After mixing evenly, finally 3 parts of antioxidant and 0.2 part of defoamer are dropped into the reactor and mixed. Antifoaming agent is phosphoric acid ester, and antioxidant is 4,4'-bis(2,2-dimethylbenzyl) di...

Embodiment 3

[0035] S1. First select 50 parts of alumina, 30 parts of zirconia, 20 parts of deionized water and 10 parts of modifier and put them into the reactor. The modifier is silane. Start the reactor. The temperature of the reactor is 60°C. The stirring speed is 250 rpm, and the stirring time is 30 minutes, and the reaction kettle is evenly stirred for its mixture;

[0036]S2, then choose 4 parts of ferric oxide, 3 parts of chromium oxide, 25 parts of silicon dioxide, 12 parts of rare earth elements, 9 parts of chromium ore, 7 parts of magnesia and 0.7 part of compatibilizer and drop into the reactor, the rare earth elements It is the combination of neodymium, europium and yttrium, and the compatibilizer is the combination of talcum powder, calcium carbonate and barium sulfate. The stirring speed of the reactor is 300 rpm, and the stirring time is 25 minutes. The oxidizing agent and 0.4 parts of defoaming agent are put into the reactor for mixing, the antioxidant is N-phenyl-N'-isopr...

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Abstract

The invention discloses a zirconium-modified aluminum oxide material. The aluminum oxide material is prepared from, by weight, 40 to 50 parts of aluminum oxide, 20 to 30 parts of zirconium oxide, 6 to10 parts of modifier, 2 to 4 parts of ferric oxide, 1 to 3 parts of chromium oxide, 15 to 25 parts of silicon dioxide, 3 to 5 parts of an antioxidant, 8 to 12 parts of a rare earth element, 0.5 to 0.7 part of a compatilizer, 0.2 to 0.4 part of a defoaming agent, 5 to 9 parts of chromium ore, 3 to 7 parts of magnesia and 10 to 20 parts of deionized water. And the modifier is titanate, stearic acid, phosphate or silane. The invention relates to the technical field of aluminum oxide material preparation. In a preparation process of the zirconium-modified aluminum oxide material, zirconium oxideis added into the material, and the zirconium oxide is dispersed on grain boundaries of aluminum oxide to different extents, plays a role in fixing and strengthening the grain boundaries, and inhibitsgrowth of aluminum oxide grains, so that the aluminum oxide material is more stable in performance and not prone to crack; and the corrosion resistance, hardness and strength of zirconium oxide are ultrahigh, so the corrosion resistance and strength of the aluminum oxide material are improved.

Description

technical field [0001] The invention relates to the technical field of alumina material preparation, in particular to a zirconium-modified alumina material. Background technique [0002] Alumina, chemical formula Al2O3, is a high-hardness compound with a melting point of 2054°C and a boiling point of 2980°C. It is an ionic crystal that can be ionized at high temperatures. It is often used in the manufacture of refractory materials. Industrial alumina is made of bauxite and hard water. For alumina with high purity requirements, it is generally prepared by chemical methods. There are many isomorphic crystals of alumina, and there are more than ten known types. There are mainly three crystal forms, namely α-Al2O3, β-Al2O3, γ-Al2O3, which has different structures and properties, is almost completely transformed into α-Al2O3 at a high temperature above 1300 ° C. Alumina is a stable oxide of aluminum. It is also called alum in mining, ceramics and material science. Soil, white so...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B35/66C04B2235/3206C04B2235/3208C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3232C04B2235/3241C04B2235/3244C04B2235/3272C04B2235/3418C04B2235/349C04B2235/447C04B2235/448C04B2235/449C04B2235/9607C04B2235/9684
Inventor 黄裕峰姚栋伟彭福郑侯永可李霞
Owner JIANGSU GUOSHENG RARE EARTH CO LTD
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