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Titanium dioxide coated zirconia powder and preparation method thereof

A zirconium dioxide and titanium dioxide technology, applied in zirconia and other directions, can solve problems such as difficulty in sintering and densification, and achieve the effects of promoting compatibility, easy industrial production, and improving sintering performance

Active Publication Date: 2017-05-31
淄博裕民基诺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a titanium dioxide-coated zirconia powder, which solves the problem of difficult sintering and densification of the zircon / zirconia composite phase material existing in the existing technology, and improves the quality of the zircon / zirconia composite phase. The sintering performance of the material; the invention also provides its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The average particle size of zirconia raw material is 0.1 μm, the amount of dispersant modified polycarboxylate AN-2000 is 0.4% of the mass of zirconia, the volume ratio of zirconia powder to water is 25:75, and the measurement is as above For example, dissolve the dispersant AN-2000 in water, adjust the pH value of the solution to 5 with lactic acid, then add zirconium dioxide powder, and disperse by ball milling for 48 hours to obtain a zirconium dioxide suspension.

[0025] The above suspension was stirred, and the titania sol was slowly added dropwise. In terms of titanium dioxide, the mass ratio of zirconium dioxide to titanium dioxide in the suspension is 90:10. After the dropwise addition, continue to stir for 4 hours, then heat the suspension to 80°C, stir and dry, then place it in a drying oven at 200°C for 8 hours, then heat-treat the dry powder at 600°C for 10 hours, and cool it down to room temperature . The heat-treated powder is ground and passed through...

Embodiment 2

[0027] The average particle size of zirconia is 1 μm, the amount of dispersant modified polycarboxylate AN-2000 is 0.3% of the quality of zirconia, and the volume ratio of zirconia powder to water is 40:60. According to the above metering ratio, the The dispersant is dissolved in water, and the pH value of the solution is adjusted to 4.5 with lactic acid, then zirconia powder is added, and ball milled for dispersing for 30 hours to obtain a zirconia suspension.

[0028] The above suspension was stirred, and the titania sol was slowly added dropwise. In terms of titanium dioxide, the mass ratio of zirconium dioxide to titanium dioxide in the suspension is 95:5. After the dropwise addition was completed, the stirring was continued for 4 hours, and then the suspension was heated to 85° C., stirred and dried, and then dried in a drying oven at 220° C. for 6 hours. The dry powder was heat-treated at 800°C for 8 hours and cooled to room temperature. The heat-treated powder is grou...

Embodiment 3

[0030] The average particle diameter of zirconia is 3 μm, the dosage of dispersant modified polycarboxylate AN-2000 is 0.2% of the quality of zirconia, the volume ratio of zirconia powder and water is 50:50, according to the above metering ratio, the The dispersant is dissolved in water, and the pH value of the solution is adjusted to 4 with lactic acid, then zirconia powder is added, and ball milled for dispersing for 24 hours to obtain a zirconia suspension.

[0031] The above suspension was stirred, and the titania sol was slowly added dropwise. Calculated by titanium dioxide, the mass ratio of zirconium dioxide to titanium dioxide in the suspension is 99:1. After the dropwise addition, the stirring was continued for 8 hours, and then the suspension was heated to 90° C., stirred and dried, and then placed in a drying oven at 250° C. for 4 hours. The above powder was heat-treated at 1000°C for 4 hours and cooled to room temperature. The heat-treated powder is ground and pa...

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Abstract

The invention relates to titanium-dioxide-coated zirconium dioxide powder and a preparation method thereof, and belongs to the technical field of powder engineering. The inner core of the powder is monoclinic zirconium dioxide, and the coating layer of the powder is titanium dioxide. The problem that sintering densification of zirconite / zirconium oxide multi-phase materials is difficult in the prior art is solved. The temporary high-concentration titanium dioxide can be provided around zirconium oxide particles, sintering of zirconite and interface compatibility between the zirconium dioxide and the titanium dioxide are promoted, the sintering performance of the multi-phase materials can be effectively improved, and the porosity of the multi-phase materials is lowered. The preparation method of the titanium-dioxide-coated zirconium dioxide powder comprises the steps that the surfaces of the zirconium oxide particles are coated with a layer of titanium dioxide, then heat treatment is carried out to make the surfaces of the zirconium oxide particles to be tightly coated with the titanium dioxide, and therefore the titanium-dioxide-coated zirconium dioxide powder is obtained. The preparation technology is easy to implement, and industrial production is easy to achieve.

Description

technical field [0001] The invention relates to a titanium dioxide-coated zirconium dioxide powder and a preparation method thereof, belonging to the technical field of powder engineering. Background technique [0002] The advantage of dense zircon brick as a refractory material lies in its excellent high-temperature physical properties, such as low thermal expansion coefficient, low thermal conductivity and good erosion resistance, which can resist the erosion of glass, slag and liquid metal alloys. Dense zircon brick is used as the key lining material of alkali-free fiberglass tank kiln, as the backing brick of the tank wall of the melting tank and the clarification tank, the pavement brick and the sub-layer brick of the tank bottom, the wall brick of the main passage and the working passage, Bottom bricks, launder bricks and brushed bricks, etc. [0003] The main mechanism of corrosion by the alkali-free glass liquid is that the glass liquid scours the surface of the bri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02
Inventor 王立平杨德安李功文王峰王鑫阎继昌高冲陈建文
Owner 淄博裕民基诺新材料有限公司
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