Method for preparing thin-diameter zirconium oxide fibers and fiber board thereof

A technology of zirconia fiber and fine diameter, which is applied in the direction of fiberboard, fiber treatment, stretch spinning, etc. It can solve the problems of difficult precise control of thickness, uneven thickness of fiberboard, uneven upper surface, etc., and achieve low cost and high purity Effect

Active Publication Date: 2011-09-14
南京理工宇龙新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, the existing zirconia fiberboard preparation technology also has certain deficiencies, such as patents ZL200910013782.1 and ZL200810020282.6, only vacuum su

Method used

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  • Method for preparing thin-diameter zirconium oxide fibers and fiber board thereof
  • Method for preparing thin-diameter zirconium oxide fibers and fiber board thereof
  • Method for preparing thin-diameter zirconium oxide fibers and fiber board thereof

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Example Embodiment

[0024] The method for preparing the fine-diameter zirconia fiber and the fiberboard of the present invention specifically includes the following steps:

[0025] (1) One-step reaction to prepare polyzirconium sol spinning solution

[0026] According to the ZrO in the reaction system 2 : The molar ratio of glacial acetic acid: water is 1:2~3:15~25. Weigh the corresponding mass of basic zirconium carbonate (molecular formula ZrOCO 3 ·NH 2 O, ZrO 2 Content 38~42wt%), and measure the corresponding volume of glacial acetic acid and water, dilute the glacial acetic acid in water, mix the aqueous acetic acid solution with basic zirconium carbonate under 70℃~80℃, stirring and pumping conditions, and react Generates basic zirconium acetate with CO 2 When the gas escapes, the basic zirconium acetate undergoes further hydrolysis-condensation reaction to form a Zr-O-Zr chain polymer with acetate as the pendant group. After the solids are completely dissolved and the reaction solution becomes tra...

Example Embodiment

[0034] Example 1:

[0035] (1) One-step reaction to prepare polyzirconium sol spinning solution:

[0036] According to the ZrO in the reaction system 2 : The molar ratio of glacial acetic acid: water is 1:2.5:20. Weigh the corresponding mass of basic zirconium carbonate (molecular formula ZrOCO 3 ·NH 2 O, ZrO 2 Content 40.6wt%) 1kg, and measure 474mL of glacial acetic acid and 1188mL of water, dilute the glacial acetic acid in water, mix and react the aqueous acetic acid solution with basic zirconium carbonate under 75℃, stirring and pumping conditions, until the solids are completely dissolved , After the reaction solution becomes transparent, the polyzirconium aqueous solution is obtained. According to the composition ratio requirement of the fully stable cubic phase zirconia, that is, ZrO 2 : Y 2 O 3 The molar ratio is 92:8, and 220g of phase stabilizer raw material yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O), stir to dissolve, and then distill under reduced pressure at 75°C to remove e...

Example Embodiment

[0043] Example 2:

[0044] (1) One-step reaction to prepare polyzirconium sol spinning solution:

[0045] According to the ZrO in the reaction system 2 : The molar ratio of glacial acetic acid: water is 1:3:25. Weigh the corresponding mass of basic zirconium carbonate (molecular formula ZrOCO 3 ·NH 2 O, ZrO 2 Content 41.4wt%) 1kg, and measure 578mL of glacial acetic acid and 1515mL of water, dilute the glacial acetic acid in water, and mix and react the acetic acid aqueous solution with basic zirconium carbonate to obtain a polyzirconium aqueous solution at 70°C under stirring and pumping conditions. According to the composition ratio requirements of fully stable cubic phase zirconia, namely ZrO 2 : Y 2 O 3 The molar ratio is 91:9, and 255g of phase stabilizer raw material yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O), stir to dissolve, and then distill under reduced pressure at 70°C to remove excess water until a polyzirconium sol spinning solution with a viscosity of 50 Pa·s and good fiber...

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Abstract

The invention relates to a method for preparing thin-diameter zirconium oxide fibers and a fiber board thereof. The method comprises the following steps of: preparing poly zirconium sol spinning solution by adopting basic zirconium carbonate, glacial acetic acid, water and yttrium nitrate as raw materials, obtaining thin-diameter poly zirconium sol fibers by ultrahigh-speed centrifugal swinging and high-speed hot airflow blowing and drafting, and performing thermal treatment and sintering on the thin-diameter poly zirconium sol fibers to obtain the thin-diameter zirconium oxide fibers; and performing vacuum suction molding and pressure leveling to prepare a wet fiber board blank by adopting the thin-diameter zirconium oxide fibers as a raw material and adopting poly zirconium sol spinningsolution diluted by adding water as adhesive, and drying and calcining the wet blank to obtain the zirconium oxide fiber board. The raw materials are easily obtained, the preparation of the adhesive is simple and convenient, and the method has low cost and no pollution and is suitable for large-batch industrialized production; the prepared thin-diameter zirconium oxide fibers have good bending flexibility; and the prepared zirconium oxide fiber board has uniform thickness, flat surface, accurate and controllable thickness, and good mechanical property and high-temperature bending resistance.

Description

technical field [0001] The invention belongs to the field of inorganic refractory materials, and in particular relates to a preparation method of fine-diameter zirconia fibers and fiberboards thereof. Background technique [0002] Ultra-high temperature refractory and heat-insulating fiber materials have important application prospects in the fields of aerospace and ultra-high temperature electric furnaces. Zirconia (ZrO 2 ) fiber and its fiberboard products can be used for a long time at a temperature above 1800°C, and have excellent thermal insulation properties, stable chemical properties at high temperatures, corrosion resistance, oxidation resistance, non-volatile, and pollution-free. Refractory fiber material. If its industrialized production can be realized and applied on a large scale in my country's aerospace and ultra-high temperature electric furnace manufacturing and other fields, it will give full play to its performance advantages of high temperature resistanc...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01D5/18D01D5/12C04B35/66D21J1/00
Inventor 刘和义刘贵双刘金强裴石光张永康陈江鹏钟健王旭季骅高文秀
Owner 南京理工宇龙新材料科技股份有限公司
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