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Preparation of zirconia ceramic beaverboard

A technology of zirconia ceramics and zirconia fibers, which is applied in the field of preparation of refractory and thermal insulation fiberboards, can solve problems such as the blank preparation method of zirconia fiberboards and technical difficulties in the preparation of zirconia fibers, achieve single composition, improve long-term high-temperature service life, and fiber Evenly distributed effect

Inactive Publication Date: 2009-06-24
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty in the preparation technology of zirconia fiber itself, there is a big gap in the preparation method of zirconia fiberboard.

Method used

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  • Preparation of zirconia ceramic beaverboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the zirconia ceramic fiberboard of the present invention is to adopt the following steps:

[0029] (1) Preparation of fully stable cubic zirconia fibers:

[0030] A Weigh zirconium oxychloride (ZrOCl 2 ·8H 2 (2) 100g, be dissolved in 800ml ethanol, be zirconium oxychloride according to molar ratio: acetylacetone: the ratio of triethylamine=1:1.8:2.5, measure 60ml acetylacetone and 110ml triethylamine, be dissolved in 800 milliliters jointly In ethanol, under stirring conditions at 5°C, atomize the ethanol dilution of acetylacetone and triethylamine into the ethanol dilution of zirconium oxychloride, and continue stirring for 3 hours after the addition to obtain a golden yellow transparent reaction solution. Remove the solvent ethanol by rotary evaporation at 40°C until it is nearly dry, and obtain a light yellow sticky substance. Add 500ml of acetone according to the ratio of zirconium oxychloride: acetone = 100g:500ml, stir to dissolve the s...

Embodiment 2

[0037] As described in Example 1, the difference is that 100 grams of fully stable cubic zirconia fibers are chopped to 1 mm using a shredder, and then placed in a slurry tank, and 20 grams of zirconia that is a cubic crystal phase at normal temperature are added Fine powder, zirconia mixed with yttrium nitrate with a mole fraction of 9% is stabilized, and the prepared ZrO 2 Fiberboard properties are as follows: bulk density 300kg / m 3, the thermal conductivity is 0.25W / mK, the shrinkage rate is 0.7% under the condition of 1650℃×24h, and 1.5% under the condition of 2100℃×1h.

Embodiment 3

[0039] As described in Example 1, the difference is that 100 grams of fully stable cubic phase zirconia fibers are chopped to 2 mm using a shredder, and then placed in a slurry pool, and 50 grams of acetylene with a mole fraction of 10% are added. Yttrium acetonate is a zirconia fine powder with a cubic crystal phase at normal temperature. Made with ZrO 2 Fiberboard properties are as follows: bulk density 400kg / m 3 , the thermal conductivity is 0.28W / mK, the shrinkage rate is 0.65% under the condition of 1650℃×24h, and 1.4% under the condition of 2100℃×1h.

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Abstract

The invention belongs to the inorganic refractory material field, and relates to a preparation method of a refractory and heat-insulating fiber board based on zirconia fiber. The preparation method mainly comprises the following steps: stable cubic phase zirconia fiber is taken as a base phase, fine zirconia powder is taken as a filler, an organic binding agent is added to prepare slurry, and the slurry is formed by vacuum filtration, dried and sintered at a high temperature to prepare the ceramic zirconia fiber board. The preparation process is simple; the prepared fiber board has the advantages of even and single component and high-temperature resistance, and the fiber board can be used in an environment of 1700 DEG C-2160 DEG C for a long time.

Description

technical field [0001] The invention relates to a preparation method of a fire-resistant and heat-preserving fiberboard based on zirconia fibers, which belongs to the field of inorganic refractory materials. Background technique [0002] With the development of my country's industry, the total energy consumption is getting higher and higher. The selection and application of thermal insulation materials with excellent technical performance can reduce the radiation heat loss of kilns and improve the thermal efficiency of kilns. At present, materials with good thermal insulation properties such as mullite fiber and alumina fiber have been popularized and applied on a large scale in my country's metallurgy, electric power, building materials, petrochemical and other industries, and achieved good results. But the maximum use temperature of mullite crystal fiber and alumina crystal fiber is only 1400°C and 1600°C. At present, in the high temperature environment above 1700 ℃, zir...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/80C04B35/622
Inventor 侯宪钦李现祥
Owner SHANDONG UNIV
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