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Flexible yttrium stable zirconium oxide ceramic fiber and preparation method thereof

A technology of yttrium-stabilized zirconia and ceramic fiber, which is applied in the preparation of flexible yttrium-stabilized zirconia ceramic fiber and flexible inorganic oxide fiber, can solve the problems of low strength, poor flexibility, and poor compactness, and achieve strong toughness, The effect of high density and lower sintering temperature

Active Publication Date: 2012-07-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of poor compactness, low strength and poor flexibility in the oxide ceramic fiber prepared by the existing electrospinning technology, the invention provides a flexible yttrium stabilized zirconia ceramic fiber and its preparation method

Method used

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  • Flexible yttrium stable zirconium oxide ceramic fiber and preparation method thereof
  • Flexible yttrium stable zirconium oxide ceramic fiber and preparation method thereof
  • Flexible yttrium stable zirconium oxide ceramic fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) Preparation of sol spinning solution: add 0.3g polyvinylpyrrolidone (PVP) to 10.0g zirconium acetate solution, stir until completely dissolved, add 0.561g yttrium nitrate (Y(NO 3 ) 3 ·6H 2 0), stirred for 30mins, then added 0.528mL tetraethyl orthosilicate (TEOS), stirred until the solution was clarified, and obtained the sol spinning solution;

[0039] (2) Inject the sol-spinning solution prepared in the above steps into the electrospinning device, and under the conditions of a voltage of 20kV, a sol-spinning velocity of 2mL / h and a distance of 25.0cm between the spinning receiving plate and the electrode, the electrospinning Spinning, zirconia gel fiber is prepared under room temperature;

[0040] (3) Dry the obtained zirconia gel fiber in a 50°C oven for 12 hours, then place it in a high-temperature furnace for calcination, raise it to 600°C at a rate of 1°C / min, keep it warm for 120mins, and then heat it at a rate of 5°C / min The speed was increased to 1400° C...

Embodiment 2

[0043] (1) Preparation of sol spinning solution: add 0.3g polyvinylpyrrolidone (PVP) to 10.0g zirconium acetate solution, stir until completely dissolved, add 0.522g yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O), stirred for 25mins, then added 0.129mL tetraethyl orthosilicate (TEOS) and 0.217g aluminum nitrate (Al(NO 3 ) 3 ·6H 2 0), stirred to the clarification of solution, obtains sol spinning solution;

[0044] (2) inject the sol-spinning liquid that above-mentioned steps makes in the electrospinning device, under the conditions of voltage 20kV, sol-spinning liquid ejection speed being 2mL / h and spinning receiving distance 20.0cm, electrospinning, Zirconia gel fibers were prepared at room temperature;

[0045] (3) Put the prepared zirconia gel fiber into a 50°C oven to dry for 12 hours, then place it in a high-temperature furnace for calcination, raise the temperature to 600°C at a rate of 1.5°C / min, keep it warm for 120mins, and then heat it up at a temperature of 5°C / min. The...

Embodiment 3

[0048] (1) Preparation of sol spinning solution: add 0.567g polyvinylpyrrolidone (PVP) to 18.902g zirconium acetate solution, stir until completely dissolved, add 0.987g yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O), after stirring for 25mins, add 0.248g titanium sulfate (Ti(SO 4 ) 2 ), stirred until the solution is clarified to obtain a sol spinning solution;

[0049] (2) Inject the sol-spinning solution prepared in the above steps into the electrospinning device, and carry out under the conditions of a voltage of 20kV, a spraying speed of the sol-spinning solution of 1.5mL / h and a distance of 20.0cm between the spinning receiving plate and the electrode. Spinning, zirconia gel fiber is prepared under room temperature;

[0050] (3) Dry the obtained zirconia gel fiber in a 50°C oven for 18 hours, then place it in a high-temperature furnace for calcination, raise the temperature to 800°C at a rate of 1°C / min, and keep it warm for 60mins to obtain tetragonal phase yttrium-stabilized ...

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Abstract

The invention relates to a flexible yttrium stable zirconium oxide ceramic fiber and a preparation method thereof. The particle diameters of zirconium oxide particles constructing the ceramic fiber are 10-400 nanometers, the diameter of the ceramic fiber is 0.5-3 mum, and the fiber is uniform and continuous, is prevented from being broken easily and has high flexibility. A zirconium oxide gel fiber is prepared by combining a sol-gel method with an electrostatic spinning technology, and the yttrium stable zirconium oxide ceramic fiber is obtained by calcining the gel fiber. The obtained yttrium stable zirconium oxide ceramic fiber has high thermal stability and excellent mechanical property, can be taken as a high-temperature catalyst carrier, a high-temperature heat insulating material aswell as a battery membrane, and can be applied to high-temperature filtering and the like. A process disclosed by the invention has high operability, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the preparation of flexible inorganic oxide fibers, in particular to a preparation method of flexible yttrium-stabilized zirconia ceramic fibers, and belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Zirconia (ZrO 2 ) Polycrystalline ceramic fiber has excellent characteristics such as high melting point (2600°C), anti-oxidation, corrosion resistance, and low thermal conductivity. It has a special position in inorganic fiber materials and is a high-performance heat-insulating and corrosion-resistant material. The field of thermal insulation plays an important role (see: Acta Synthetic Crystals 2009, 38, 265). [0003] Due to the high melting point of zirconia and the low viscosity characteristics of the melt, the ceramic fiber cannot be prepared by the fusion filament method, but only the precursor method can be used to prepare the zirconia ceramic fiber. At present, the main pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 陈代荣李微焦秀玲
Owner SHANDONG UNIV
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