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: 2013-01-02
南京理工宇龙新材料科技股份有限公司
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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 suction filter is used for forming fiberboard, and there are uneven thickness of fiberboard, uneven upper surface, and difficult thickness. Precise control and other deficiencies

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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preparation example Construction

[0024] The preparation method of fine-diameter zirconia fiber and fiberboard thereof of the present invention specifically comprises the following steps:

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

[0026] According to the ZrO in the reaction system 2 : Glacial acetic acid: the molar ratio of water is the ratio of 1: 2~3: 15~25, takes the zirconium basic 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, and mix the acetic acid aqueous solution and basic zirconium carbonate at 70°C ~ 80°C under stirring and pumping conditions, and react Form zirconium basic acetate with CO 2 The gas escapes, and the basic zirconium acetate undergoes further hydrolysis-polycondensation reaction to form a Zr-O-Zr chain polymer with acetate as the side group. After the solid is completely dissolved and the reaction solution be...

Embodiment 1

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

[0036] According to the ZrO in the reaction system 2 : Glacial acetic acid: the molar ratio of water is the ratio of 1: 2.5: 20, and the zirconium basic carbonate (molecular formula ZrOCO 3 ·nH 2 O, ZrO 2 Content 40.6wt%) 1kg, and measure 474mL glacial acetic acid and 1188mL water, dilute glacial acetic acid in water, under 75 ℃, under the condition of stirring and pumping air, the aqueous solution of acetic acid and basic zirconium carbonate are mixed and reacted, until all solids are dissolved , After the reaction solution becomes transparent, the polyzirconium aqueous solution is obtained, and according to the composition ratio requirements of the fully stable cubic phase zirconia, that is, ZrO 2 : Y 2 o 3 The mol ratio is the ratio of 92:8, in the above-mentioned polyzirconium aqueous solution, add 220g phase stabilizer raw material yttrium nitrate (Y(NO 3 ) 3 ·6H 2 (0), stirring to make i...

Embodiment 2

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

[0045] According to the ZrO in the reaction system 2 : glacial acetic acid: the molar ratio of water is the ratio of 1: 3: 25, and the zirconium basic carbonate (molecular formula ZrOCO 3 ·nH 2 O, ZrO 2 Content 41.4wt%) 1kg, and measure 578mL glacial acetic acid and 1515mL water, dilute glacial acetic acid in water, under 70 ℃, under the condition of stirring and pumping air, acetic acid aqueous solution and basic zirconium carbonate are mixed and reacted to obtain polyzirconium aqueous solution, According to the composition ratio requirements of fully stable cubic zirconia, that is, ZrO 2 : Y 2 o 3 The mol ratio is the ratio of 91:9, in the above-mentioned polyzirconium aqueous solution, add 255g phase stabilizer raw material yttrium nitrate (Y(NO 3 ) 3 ·6H 2 (0), stirring to make it dissolve, and then distilling under reduced pressure at 70°C to remove excess moisture until obtaining a polyz...

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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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Patent Type & Authority Patents(China)
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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