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Preparation method of zirconium oxide hollow spheres

A technology of hollow spheres and zirconia, applied in the field of preparation of zirconia-based hollow spheres, can solve problems such as hollow sphere damage, low strength, and affecting product performance, and achieve the effect of easy industrialization and simple process

Active Publication Date: 2012-07-18
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using DC or three-phase AC submerged arc furnace electromelt blowing method to prepare ceramic hollow spheres, if the melt viscosity is not properly controlled, the prepared hollow spheres will have thinner walls and lower strength. The hollow ball is prone to damage, which will affect the performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The solid ceramic powder is mixed according to the mass percentage: monoclinic zirconia powder (350 mesh) 90 wt%, magnesia micropowder 10 wt%, and the ratio is fully mixed to make a uniform ceramic powder.

[0020] Mix ceramic powder, dispersant, binder PVA (6wt% concentration), CMC, water in proportions of 82wt%, 0.06wt%, 2.0wt%, 0.015%, 15.925wt%, and add them to the planetary ball mill , Ball milled for 4h to obtain a uniform and stable ceramic slurry.

[0021] Use a high-speed mixer to fully mix the polystyrene pellets and ceramic slurry evenly, and the slurry mixed with polystyrene pellets passes through the screen to filter out the excess slurry, and repeat it many times until the surface has a certain thickness and uniformity. The polystyrene pellets of the slurry reach the required size, and the polystyrene pellets are blown and dried. Send the dried biscuit into a high-temperature firing furnace for sintering, raise the temperature to 600°C at a heating rate o...

Embodiment 2

[0023] The solid ceramic powder is mixed according to the mass percentage: monoclinic zirconia powder (500 mesh) 88 wt%, magnesia micropowder 12 wt%, and the ratio is fully mixed to make a uniform ceramic powder.

[0024] Mix ceramic powder, dispersant, binder PVA (6wt% concentration), CMC, and water in proportions of 80wt%, 0.09wt%, 0.5wt%, 0.1wt%, 19.31wt%, and add them to the planetary ball mill In the process, a uniform and stable ceramic slurry was obtained by ball milling for 6h.

[0025] Use a high-speed mixer to fully mix the polystyrene pellets and ceramic slurry evenly, and the slurry mixed with polystyrene pellets passes through the screen to filter out the excess slurry, and repeat it many times until the surface has a certain thickness and uniformity. The polystyrene pellets of the slurry reach the required size, and the polystyrene pellets are blown and dried. Send the dried biscuit into a high-temperature firing furnace for sintering, raise the temperature to 6...

Embodiment 3

[0027] The solid ceramic powder is mixed according to the mass percentage: monoclinic zirconia powder (350 mesh) 95 wt%, magnesia micropowder 5 wt%, and the proportion is fully mixed to make a uniform ceramic powder.

[0028] Mix ceramic powder, dispersant, binder PVA (6wt% concentration), CMC, and water in proportions of 85wt%, 0.25wt%, 0.15wt%, 0.2wt%, 14.4wt%, and add them to the planetary ball mill In the process, the ball milled for 4h to obtain a uniform and stable ceramic slurry.

[0029] Use a high-speed mixer to fully mix the polystyrene pellets and ceramic slurry evenly, and the slurry mixed with polystyrene pellets passes through the screen to filter out the excess slurry, and repeat it many times until the surface has a certain thickness and uniformity. The polystyrene pellets of the slurry reach the required size, and the polystyrene pellets are blown and dried. Send the dried biscuit into a high-temperature firing furnace for sintering, raise the temperature to ...

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Abstract

The invention relates to the preparation technology of fire resistant materials and discloses a preparation method of zirconium oxide hollow spheres. The preparation method comprises the steps of: mixing a solid ceramic powder material with a solvent according to a certain proportion to prepare uniform and stable ceramic slurry; with polystyrene spheres as templates, fully soaking a plurality of the polystyrene spheres in the ceramic slurry; and enabling the ceramic slurry mixed with the polystyrene spheres to pass through a screen, filtering out excessive slurry, repeatedly covering the surfaces of the polystyrene spheres with the ceramic slurry, then drying the polystyrene spheres with the ceramic slurry of a certain thickness, removing plastics and sintering at a high temperature, wherein in the process of sintering at a high temperature, the polystyrene spheres are fully volatilized through high temperature combustion and hollow structures are left, so that the zirconium oxide ceramic hollow spheres are obtained. According to the preparation method of zirconium oxide hollow spheres, the problem of easy breakage of hollow spheres in the prior art is solved, and the sizes of the polystyrene spheres can be selected according to the sizes of the required hollow spheres; and the preparation method is simple in process and easy for industrial popularization.

Description

technical field [0001] The invention relates to a method for preparing a refractory material, in particular to a method for preparing a zirconia hollow sphere. Background technique [0002] Ceramic hollow balls are mainly used in the field of kiln lining heat insulation materials and lightweight heat preservation materials. At present, alumina, zirconia, and mullite hollow balls have been developed and have been widely used. Zirconia hollow spheres and their products have the characteristics of small volume density, small heat capacity, and low thermal conductivity. As a kiln lining material, it can greatly improve the kiln use efficiency and shorten the production cycle. The long-term service temperature of zirconia hollow ball products can reach 2200 ℃, and it has the characteristics of corrosion resistance and good thermal shock stability. At present, the common preparation method of hollow spheres for refractory materials is that the raw materials are placed in a specia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/48C04B35/622
Inventor 王自强王刚王泽华王冬冬黄佳原
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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