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Method for producing stable zirconia powder fiber felt

The technology of a zirconia powder and a production method, which is applied in the field of refractory insulation materials, can solve the problems of complex construction, complex production process and high cost, and achieve the effects of no environmental pollution, simple process and low cost.

Active Publication Date: 2015-06-03
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, refractory insulation materials mainly include zirconia bricks and zirconia hollow ball bricks. The size is mainly standard bricks 230mm*114mm*65mm. Large proportion, complex production process, dust pollution and other problems, complex construction, cannot be processed on site, high thermal conductivity and poor insulation effect
[0003] Refractory fiberboard, mainly cubic zirconia fiber, is made into fiber felt or fiberboard through needle punching or vacuum suction filtration, but all of them are made of whole fiber, with low strength and low service temperature, so they cannot be directly used as kiln lining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The production method described in the present embodiment comprises the steps:

[0024] (1) Prepare a saturated zirconia solution: mix zirconia and a stabilizer, obtain an electric frit through high-temperature electric fusion, crush and process it into a fine powder of ≤10 μm, and dissolve the fine powder in water to obtain a saturated zirconia solution;

[0025] Among them, the mass ratio of zirconia to stabilizer is 93.2:6.8, and the stabilizer used is yttrium oxide.

[0026] (2) Preparation of surface zirconium sol: mix yttrium oxide and zirconia evenly, dissolve in water, add a strong oxidant, concentrate until pH is 2.9, and obtain surface zirconium sol;

[0027] Wherein, the mass ratio of yttrium oxide to zirconia is 5:95, the addition amount of strong oxidant is 20% of the total mass of yttrium oxide and zirconia, and the strong oxidant used is hydrogen peroxide.

[0028] (3) Treatment with saturated zirconia solution: soak the fiber felt in the saturated zirco...

Embodiment 2

[0033] The production method described in the present embodiment comprises the steps:

[0034] (1) Prepare a saturated zirconia solution: mix zirconia and a stabilizer, obtain an electric frit through high-temperature electric fusion, crush and process it into a fine powder of ≤10 μm, and dissolve the fine powder in water to obtain a saturated zirconia solution;

[0035] Among them, the mass ratio of zirconia to stabilizer is 95.4:4.6, and the stabilizer used is calcium oxide.

[0036] (2) Preparation of surface zirconium sol: mix yttrium oxide and zirconia evenly, dissolve in water, add a strong oxidant, concentrate until pH is 2.5, and obtain surface zirconium sol;

[0037] Wherein, the mass ratio of yttrium oxide to zirconia is 3:97, the addition amount of strong oxidant is 25% of the total mass of yttrium oxide and zirconia, and the strong oxidant used is hydrogen peroxide.

[0038] (3) Treatment with saturated zirconia solution: soak the fiber felt in the saturated zirco...

Embodiment 3

[0043] The production method described in the present embodiment comprises the steps:

[0044] (1) Prepare a saturated zirconia solution: mix zirconia and a stabilizer, obtain an electric frit through high-temperature electric fusion, crush and process it into a fine powder of ≤10 μm, and dissolve the fine powder in water to obtain a saturated zirconia solution;

[0045] Wherein, the mass ratio of zirconia to the stabilizer is 95.8:4.2, and the stabilizer used is obtained by mixing calcium oxide and yttrium oxide at a mass ratio of 3.3:1.1.

[0046] (2) Preparation of surface zirconium sol: mix yttrium oxide and zirconia evenly, dissolve in water, add a strong oxidant, concentrate until pH is 2, and obtain surface zirconium sol;

[0047] Wherein, the mass ratio of yttrium oxide to zirconia is 4:96, the addition amount of strong oxidant is 30% of the total mass of yttrium oxide and zirconia, and the strong oxidant used is aqua regia.

[0048] (3) Treatment with saturated zirco...

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Abstract

The invention relates to a method for producing a stable zirconia powder fiber felt, belonging to the technical field of refractory and thermal insulation materials. The production method comprises the following steps: by taking a fiber felt as a carrier, soaking the carrier in a saturated zirconia solution, performing surface zirconia sol treatment, and sintering at a high temperature, thereby obtaining the zirconia powder fiber felt. The production method has the characteristics that the production process is simple, the production cost is low, complex equipment is not needed and environment friendliness is realized, and the prepared zirconia powder fiber felt is high in strength and high in temperature resistance and can be directly used for an ultrahigh temperature environment.

Description

technical field [0001] The invention relates to a production method of a stabilized zirconia powder fiber felt, which belongs to the technical field of refractory and thermal insulation materials. Background technique [0002] At present, refractory insulation materials mainly include zirconia bricks and zirconia hollow ball bricks. The size is mainly standard bricks 230mm*114mm*65mm. The proportion is large, the production process is complicated, there are problems such as dust pollution, the construction is complicated, it cannot be processed on site, and the thermal conductivity is large and the insulation effect is poor. [0003] Refractory fiberboard is mainly made of cubic zirconia fiber, which is made into fiber felt or fiberboard through needle punching or vacuum suction filtration, but all of them are made of whole fiber, with low strength and low service temperature, so they cannot be directly used as kiln lining. Contents of the invention [0004] Aiming at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 王光强刘雪燕陈杰韩雍雍杨前进高延峰
Owner SHANDONG LEIBAO ZIRCONIUM SCI&TECH