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Preparation method of high-strength and ultra-high temperature resistant zirconia fiberboard or special-shaped parts

A technology of zirconia fiber and special-shaped parts, which is applied in the field of ultra-high temperature heat insulation and energy-saving materials, which can solve the problems of easy deformation, cracking or even pulverization of fiberboard, high risk, wide distribution of fiber diameters, etc., and achieve excellent high temperature mechanics and heat insulation performance, high compressive strength, and high heating efficiency

Active Publication Date: 2019-10-29
山东德艾普节能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the document states that the zirconia fiberboard is used in an environment of 1700°C to 2160°C, the fiberboard described in the invention is prone to deformation, cracking and even pulverization in an environment above 1800°C through experiments; Because the fiber diameter of the fiberboard is relatively thick, the compressive strength of the obtained fiberboard is difficult to meet the application requirements of special high-strength occasions
CN101234906 provides a method for preparing zirconia fiberboard by "inorganic zirconium glue bonding + vacuum forming method". Inorganic zirconium glue is used as binder, and zirconia fiberboard is obtained through pulping, molding, drying and high-temperature heat treatment. High-temperature heat treatment refers to After 1800 ℃ ~ 2400 ℃ ultra-high temperature flame heat treatment, the diameter of the fiber is 3-20 microns. The disadvantages of this invention are: first, the diameter distribution of the fiber is wide, resulting in uneven distribution of the density of the fiberboard; second, the cost of the ultra-high temperature flame is high , high risk, and difficult to achieve large-scale
In addition, the above two patent documents only describe the preparation method of zirconia fiberboard, and do not involve the preparation technology of zirconia special-shaped parts

Method used

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  • Preparation method of high-strength and ultra-high temperature resistant zirconia fiberboard or special-shaped parts
  • Preparation method of high-strength and ultra-high temperature resistant zirconia fiberboard or special-shaped parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Preparation of high-strength ultra-high temperature resistant zirconia fiberboard

[0038] (1), pulping. Weigh basic zirconium carbonate and glacial acetic acid according to the molar ratio of basic zirconium carbonate: glacial acetic acid as 1:2.2, slowly add glacial acetic acid to basic zirconium carbonate powder, and wait until the reaction is completely stirred to form a transparent solution. than Y 2 o 3 :( 2 o 3 +ZrO 2 ) = 8mol% mixed with yttrium nitrate hexahydrate, stirred and dissolved to form polyzirconyl acetate sol; polyzirconyl acetate sol was mixed with water evenly according to the volume ratio of 1:2, and the resulting mixed solution was used to make zirconia fiberboard Binder for special-shaped parts; chopped zirconia fibers sintered to 1200°C with a diameter of 4μm-5μm to 1-3mm, and then added to the above mixed solution binder, the weight of zirconia fibers is bonded with the mixed solution The weight ratio of the agent is 1:50, mix ...

Embodiment 2

[0042] Example 2: Preparation of high-strength ultra-high temperature resistant zirconia fiber profiled parts

[0043] As described in Example 1, the difference is that in step (2), the suspension is poured into the special-shaped part mold, and the special-shaped part mold is a curved plate mold with butt joint bumps at both ends, which are suitable for the shape of the product. Vacuum filter to remove excess water, then pressurize and filter, and recycle the excess solution to obtain zirconia fiber shaped parts, such as figure 2 shown. The obtained product is tested, and the purity is 99.8%, and the product density is 350Kg / m 3 , Under the condition of 2200℃X12h, the linear shrinkage rate is 1%, and the dimensional change rate is less than 1%. The zirconia fiber profiled part is butted into a ring shape and can be used as a thermal insulation part of a crystal growth furnace.

Embodiment 3

[0045] As described in Example 1, the difference is that in step (1), the polyzirconyl acetate sol is uniformly mixed with water at a volume ratio of 1:5, and the resulting mixed solution is used as a binder for making zirconia fiberboards and special-shaped parts . The resulting zirconia fiberboard has been tested and found to have a purity of 99.8% and a bulk density of 300Kg / m 3 , the compressive strength at room temperature is 2.8MPa, and the shrinkage rate is 1.2% at 2200°C X12h.

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Abstract

The invention relates to a preparation method of a high-strength ultrahigh-temperature-resistant zirconia fiberboard or special-shaped part. The method includes cutting zirconia fibers with the diameter of 500 nanometers to 5 micrometers to 1-3mm, and mixing the short zirconia fibers with a poly zirconia acetate binder to form a suspension; pouring the suspension into a mold, and performing suction filtration and compression molding; performing microwave drying and 1800-2500 DEG C ultrahigh temperature sintering to obtain the ultrahigh-temperature-resistant zirconia fiberboard or special-shaped part. The prepared zirconia fiberboard or special-shaped part does not deform and have weakened energy-saving effect after long-time use at the temperature of 1800-2500 DEG C, has high mechanical property, can be widely applied to the fields such as ultrahigh-temperature industrial furnaces, single crystal furnaces and high-temperature test furnaces, and has obvious advantages in terms of ultrahigh-temperature resistance, heat insulation and energy conservation.

Description

technical field [0001] The invention relates to a preparation method of a high-strength ultra-high temperature resistant zirconia fiber board or a special-shaped piece, and belongs to the technical field of ultra-high temperature heat-insulating and energy-saving materials. Background technique [0002] In the field of ultra-high temperature, heat-resistant heat insulation and energy-saving materials have always been an important factor affecting or even restricting the development of this field. At present, most of the thermal insulation layers used at ultra-high temperatures are high-density rigid products pressed by ceramic powder or granules, but due to their high density and large heat capacity, the thermal insulation performance is limited to a certain extent. [0003] Refractory fiberboard or special-shaped parts not only have the temperature resistance of the material itself, but also have the characteristics of low density and good heat insulation effect, and are wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/48C04B35/64C04B35/634
CPCC04B35/48C04B35/63448C04B35/64C04B35/66C04B2235/3225C04B2235/48C04B2235/5236C04B2235/5264C04B2235/94C04B2235/96C04B2235/9615
Inventor 许东朱陆益刘雪松张光辉王新强
Owner 山东德艾普节能材料有限公司
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