Preparation method of polycrystal zirconia fiber and zirconia/alumina composite fiber

A zirconia fiber and composite fiber technology, which is applied in the directions of fiber chemical characteristics, spinning solution preparation, and conjugated rayon filaments, etc., can solve problems such as industrialized production that has not yet been formed, and achieve widened application, short process time, and high processing efficiency. simple craftsmanship

Active Publication Date: 2012-05-23
山东鲁阳浩特高技术纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some domestic scientific research institutes (Shandong Institute of Industrial Ceramics, Shandong University, etc.) and enterprises (such as

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 100kg of industrial hydrochloric acid, 300kg of distilled water, and 60kg of ethanol, dilute it and place it in a reaction kettle, heat it to 60°C under normal pressure, slowly add 200kg of zirconium carbonate powder into the above hydrochloric acid solution, reflux and digest, and control the reflux time for 6 hours , the reflux temperature is at 80° C., the insoluble matter is removed by filtration, and the zirconia content in the sol is 25 wt % through distillation and dehydration to form a clear and transparent polyhydroxyzirconium chloride sol. The sol is sucked into a concentration kettle, 48kg of yttrium chloride is dissolved in 100kg of distilled water, sucked into the reaction kettle, and 6kg of silica sol and 196kg of 8wt% polyvinyl alcohol spinning aid are added at the same time, and slowly concentrated at 60°C until A spinning solution with a viscosity of 2-5 Pa.s is formed. The spinning stock solution was aged at room temperature for 8 hours, introduce...

Embodiment 2

[0034] Take 100kg of industrial hydrochloric acid and 300kg of distilled water, dilute it and place it in a reaction kettle, heat it to 60°C under normal pressure, slowly add 240kg of zirconium carbonate powder into the above hydrochloric acid solution, reflux for digestion, control the reflux time to 4 hours, and the reflux temperature At 90° C., filter to remove insoluble matter after the reaction, and further distill and dehydrate until the content of zirconia in the sol is 20 wt%, until a clear and transparent polyzirconium hydroxychloride sol is formed. The sol is sucked into the concentration kettle, 40kg of calcium chloride is dissolved in 100kg of distilled water, sucked into the reaction kettle, and 10kg of silica sol and 168kg of 2wt% polyethylene oxide spinning aid are added at the same time, and slowly concentrated at 70°C until the formation of Spinning solution with a viscosity of about 5-10 Pa.s. After the stock solution was aged at room temperature for 8 hours,...

Embodiment 3

[0036] Take 100kg of industrial hydrochloric acid and 300kg of distilled water, dilute it and place it in a reaction kettle, heat it to 60°C under normal pressure, slowly add 240kg of zirconium carbonate powder to the above hydrochloric acid solution, reflux and digest at 95°C, and control the reflux time for 8 hours After the reaction is finished, the insoluble matter is removed by filtration, and further distilled and dehydrated until the content of zirconia in the sol is 20 wt%, until a clear and transparent polyhydroxyzirconium chloride sol is formed. Inhale the sol into a concentration kettle, add 1000kg of aluminum sol, 40kg of calcium chloride, 10kg of silica sol and 340kg of 7wt% polyoxyethylene spinning aid, and slowly concentrate at 40°C until a sol with a viscosity of about 5-10Pa.s is formed. spinning solution. After the stock solution was aged at room temperature for 8 hours, the spinning solution was introduced into the liquid material tank of the blow spinning m...

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Abstract

The invention relates to a preparation method of a polycrystal zirconia fiber and zirconia/alumina composite fiber, which is characterized by comprising the following steps of: with zirconium carbonate and hydrochloric acid as raw materials and water or a mixture comprising water and alcohol as a solvent, preparing uniform and transparent polyhydroxy zirconium chloride sol under a refluxing state; adding a phase stabilizer, a grain growth inhibitor and a water-soluble polymer spinning aid to the sol and distilling at reduced pressure to prepare an inorganic zirconium spinning solution, or adding aluminum sol, the phase stabilizer, the crystal grain growth inhibitor and the water-soluble polymer spinning aid to the sol and distilling at reduced pressure to prepare an aluminum-zirconium composite spinning solution; and preparing gelatin fiber through centrifugal fiber throwing or blowing spinning, and carrying out heat treatment to obtain the polycrystal zirconia fiber and zirconia/alumina composite fiber. The preparation method disclosed by the invention has the advantages of low price of raw materials, simple equipment, low requirement on environment, no need of inertial environment, short flow time of the whole process and suitability for industrial production.

Description

technical field [0001] The invention relates to a preparation method of refractory fiber material, in particular to a preparation method of polycrystalline zirconia fiber and zirconia / alumina composite fiber. Background technique [0002] Ceramic fiber materials are widely used in many fields such as high temperature insulation, metal and ceramic composite material reinforcement due to their excellent chemical stability, structural stability and good thermal and mechanical properties. In recent years, with the continuous development of the aerospace industry and high-temperature insulation fields, higher requirements have been placed on the high-temperature performance of fiber materials. The current refractory fiber materials can no longer meet the long-term use requirements of high-temperature environments above 1600 ° C. There is an urgent need for a A new high-temperature refractory fiber to solve the current bottleneck of lack of thermal insulation materials in the high...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F8/18D01D1/02D01D10/02C04B35/48C04B35/10
Inventor 李呈顺鹿成洪鹿俊华岳耀辉杨晴晴
Owner 山东鲁阳浩特高技术纤维有限公司
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