Preparation method of continuous fiber of yttrium aluminum garnet

A technology of yttrium aluminum garnet and continuous fiber, which is applied in the direction of spinning solution preparation, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of low production efficiency, time-consuming, fiber length discussion, etc., and achieve short production cycle , Improving spinning performance and stabilizing mechanical properties

Active Publication Date: 2017-07-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not discuss the length of the fiber, and it takes too much time to prepare the spinning dope. If it is industrialized, the production efficiency is low

Method used

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  • Preparation method of continuous fiber of yttrium aluminum garnet
  • Preparation method of continuous fiber of yttrium aluminum garnet
  • Preparation method of continuous fiber of yttrium aluminum garnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of preparation method of yttrium aluminum garnet continuous fiber, comprises steps as follows:

[0050] (1) Preparation of spinnable precursor sol

[0051] 925.2g containing Al 13 The alumina sol (solid content is 22.04wt%) of colloidal particles is mixed with 419.6g gamma-AlOOH nano-dispersion liquid (solid content is 12.15wt%), utilizes disperser to stir until uniform, according to n (Al 2 o 3 ):n(Y 2 o 3 )=5:3 metering composition adds 2258.1g yttrium oxide sol (solid content is 15wt%), 35 ℃ of water baths stir, add 450g glacial acetic acid in stirring process, wherein the mol ratio of yttrium oxide and glacial acetic acid is 1:1.25, then Add 173g of dilute nitric acid to adjust the pH value to 2.0, add 39.6g of PVP solution, stir and mix evenly.

[0052] The aging temperature was set at 40 °C, and the aging process was carried out under the condition of a vacuum of 0.095 MPa. The mixed sol was aged to a viscosity of 500 Pa·s to obtain a precursor spinnab...

Embodiment 2

[0069] A kind of preparation method of yttrium aluminum garnet continuous fiber, comprises steps as follows:

[0070] (1) Preparation of spinnable precursor sol

[0071] 925.2g containing Al 13 The alumina sol (solid content is 22.04wt%) of colloidal particles is mixed with 419.6g gamma-AlOOH nano-dispersion liquid (solid content is 12.15wt%), utilizes disperser to stir until uniform, according to n (Al 2 o 3 ):n(Y 2 o 3 )=5:3 metering composition adds 2258.1g yttrium oxide sol (solid content is 15wt%), 35 ℃ of water baths stir, add 450g glacial acetic acid in stirring process, wherein the mol ratio of yttrium oxide and glacial acetic acid is 1:1.25, this When the pH value was 3.8, 98.9g of PVP solution was added, stirred and mixed evenly.

[0072] The aging temperature was set at 40°C, and the aging process was carried out under the condition of a vacuum of 0.095 MPa. The aging process was carried out under the condition of a vacuum of 0.095 MPa, and the mixed sol was ag...

Embodiment 3

[0077] A kind of preparation method of yttrium aluminum garnet continuous fiber, comprises steps as follows:

[0078] (1) Preparation of spinnable precursor sol

[0079] 925.2g containing Al 13 The alumina sol (solid content is 22.04wt%) of colloidal particles is mixed with 419.6g gamma-AlOOH nano-dispersion liquid (solid content is 12.15wt%), utilizes disperser to stir until uniform, according to n (Al 2 o 3 ):n(Y 2 o 3 )=5:3 metering composition adds 2258.1g yttrium oxide sol (solid content is 15wt%), 35 ℃ of water baths stir, add 486g glacial acetic acid in stirring process, wherein the mol ratio of yttrium oxide and glacial acetic acid is 1:1.35, then Add 195g of dilute nitric acid to adjust the pH value to 1.8, add 98.9g of PVP solution, stir and mix evenly.

[0080] The aging temperature was set at 40°C, and the aging process was carried out under the condition of a vacuum of 0.095 MPa. The mixed sol was aged to a viscosity of 520 Pa·s to obtain a precursor spinnabl...

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Abstract

The invention relates to a preparation method of a continuous fiber of a yttrium aluminum garnet. The method comprises the steps of preparing a spinnable precursor sol from aluminum oxide sol containing Al13 colloidal particles, a gamma-AlOOH nano dispersion liquid, yttrium oxide sol, glacial acetic acid and polyvinylpyrrolidone (PVP), preparing a gel continuous fiber by adopting a dry spinning technology and carrying out thermal treatment to obtain the continuous fiber of yttrium aluminum garnet, which is 6-12 microns in diameter. The precursor sol prepared by adopting a sol-gel method is uniform and stable, and can be stored for a long period of time. The length of the gel continuous fiber prepared with dry spinning can reach 3,000m, the fiber subjected to thermal treatment is smooth in surface, the internal structure is compact, the strength is high, and the fiber has very good flexibility, is small in high-temperature creep in a high-temperature using process, and can be widely applied to a composite material and a thermal protection material in the industries such as aerospace. The method is simple in process and short in production period, and industrialization is easy to implement.

Description

technical field [0001] The invention relates to a preparation method of yttrium aluminum garnet (YAG) continuous fiber, which belongs to the field of inorganic non-metallic materials. Background technique [0002] Alumina fiber is a kind of high-performance inorganic ceramic fiber. Its main component is alumina, and some non-metal oxides and metal oxide components such as silica, boria, and zirconia are added. According to the shape, it can be divided into different types such as short fibers, continuous fibers, and whiskers. The diameter of continuous fibers is generally about 10 μm, and the length can reach several kilometers. Yttrium aluminum garnet continuous fiber is a kind of alumina fiber, which is Al 2 o 3 and Y 2 o 3 The composite oxide has a melting point as high as 1970°C and is chemically stable. Yttrium aluminum garnet fibers not only have excellent properties such as high strength, high modulus, and high temperature resistance, but also have excellent high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/505C04B35/622C04B35/624
CPCC04B35/44C04B35/505C04B35/62236C04B35/624C04B2235/764C04B2235/3225C04B2235/3218C04B35/6342C04B35/6263C04B35/62675C04B2235/526C04B2235/5264C04B2235/96D01D5/04D01D1/02D01F9/08D01F6/56C01P2002/72C01P2004/03C01P2004/16C01F17/34C04B35/63444C04B2235/3222D10B2101/08C04B35/62231
Inventor 陈代荣孟强贾玉娜焦秀玲朱超柴鲁宁
Owner SHANDONG UNIV
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