Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3

A continuous fiber, 5wt.o3 technology, applied in the field of preparation of alumina-based ceramic continuous fiber, can solve the problem of low tensile strength, achieve the effects of reducing calcination temperature, improving fiber performance, and inhibiting grain growth

Active Publication Date: 2019-03-08
SHANDONG UNIV
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As another example, Liu Wensheng et al. (see patent literature: CN106609404A) used inorganic aluminum salt, aluminum hypoacetate, silica sol and boron-containing additives as raw materials to prepare a low-density high-performance alumina ceramic fiber by sol-gel method. The density is 2.6~2.67g / cm 3 , with a diameter of 8-18 μm and a tensile strength of 1.4-1.65 GPa, but the diameter is still relatively thick and the tensile strength is relatively low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3
  • Preparation method for aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3
  • Preparation method for aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A containing 1 ~ 5wt% B 2 o 3 A method for preparing alumina-based ceramic continuous fibers, comprising the following steps:

[0046] (1) Preparation of spinnable precursor sol

[0047] Contains Al in 1361.6g 13 Colloidal aluminum sol (in the form of A1 2 o 3 meter, A1 2 o 3 content is 12.91wt%), add 137.87g pseudo-boehmite nano-dispersion (A1 2 o 3 The mass content is 5wt%), stir at room temperature, and mix well; add 208.73g silica sol (SiO 2 content is 35wt%), stir at room temperature, then add 667.7g boric acid aqueous solution (H 3 BO 3 Content is 3.45wt%) and 173.33g polymer spinning aid polyvinyl alcohol aqueous solution (polyvinyl alcohol content is 15wt%), stirs evenly under room temperature, obtains mixed liquor; Then mixed liquor is in 40 ℃ of water baths, vacuum Under the condition of 0.095MPa, the aging concentration is carried out until the viscosity of the sol is 580Pa.s, and the spinnable precursor sol is obtained.

[0048] Among them, with ...

Embodiment 2

[0056] A containing 1 ~ 5wt% B 2 o 3 A method for preparing alumina-based ceramic continuous fibers, comprising the following steps:

[0057] (1) Preparation of spinnable precursor sol

[0058] Contains Al in 1072.4g 13 Colloidal aluminum sol (in the form of A1 2 o 3 Meter, Al 2 o 3 content is 13.5wt%), add 78.5g pseudo-boehmite nano-dispersion (Al 2 o 3 The mass content is 5%), stir evenly at room temperature, then add 162g silica sol (SiO 2 Content is 35wt%) and 190.5g boric acid aqueous solution (H 3 BO 3 Content is 3.45wt%), then add 132.3g polyvinylpyrrolidone aqueous solution (mass content of polyvinylpyrrolidone is 12.5wt%) as spinning aid, stir at room temperature to obtain mixed solution; then mixed solution in 40 ℃ water bath, Under the condition of vacuum degree of 0.098MPa, the aging concentration is carried out until the viscosity of the sol is 795Pa.s, and the spinnable precursor sol is obtained.

[0059] Among them, with A1 2 o 3 meter, Al in the m...

Embodiment 3

[0067] A containing 1 ~ 5wt% B 2 o 3 A method for preparing alumina-based ceramic continuous fibers, comprising the following steps:

[0068] (1) Preparation of spinnable precursor sol

[0069] Contains Al in 1182.5g 13 Colloidal aluminum sol (in the form of A1 2 o 3 Meter, Al 2 o 3 content of 13.5wt%), add 81.6g pseudo-boehmite dispersion (Al 2 o 3 The mass content is 5wt%), stir evenly at room temperature, then add 155.66g silica sol (SiO 2 Mass content is 35%) and 198.76g boric acid aqueous solution (H 3 BO 3 Mass content is 3.45wt%), then add 127.52g polyoxyethylene aqueous solution (mass content of polyoxyethylene is 17.8wt%) as spinning aid, stir at room temperature, obtain mixed liquor; Then mixed liquor is in 40 ℃ In a water bath, aging concentration is carried out under the condition of a vacuum of 0.096 MPa until the viscosity of the sol is 894 Pa.s to obtain a spinnable precursor sol.

[0070] Among them, with A1 2 o 3 meter, Al in the mixture 2 o 3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
strengthaaaaaaaaaa
modulusaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method for an aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3. The method comprises the following steps that alumina sol containing Al13 colloidal particles, a pseudo-boehmite nano-dispersion, silica sol, a boric acid aqueous solution and a high-molecular spinning auxiliary are mixed so as to obtain a mixed solution; then aging and concentrating are carried out until the viscosity of a system is 500-1000 Pa*s so as to obtain spinnable precursor sol; and dry spinning, drying and calcining are carried out so as to obtain the aluminumoxide-based ceramic continuous fiber. According to the preparation method, the electron deficiency effect of boron is utilized, and addition reaction of water is carried out on the boric acid to formB(OH)4<->, so that the boric acid can be stably combined with polyhydroxyl pseudo-boehmite nano-particles so as to prepare the spinnable precursor sol and the fiber with excellent properties. The method has the advantages that the raw materials are easy to obtain, and industrialized application is easy to realize; and the diameter of the prepared fiber is 5-8 microns, the strength of the single fiber can reach 2.0 GPa, the modulus can reach 149 GPa, and various excellent performances such as high temperature resistance, flexibility and spinnability are achieved.

Description

technical field [0001] The present invention relates to a kind of containing 1~5wt% B 2 o 3 The invention discloses a method for preparing alumina-based ceramic continuous fibers, belonging to the field of inorganic non-metallic materials. Background technique [0002] Alumina-based ceramic continuous fibers are mainly based on Al 2 o 3 Ceramic fiber as the main component has the advantages of high mechanical tensile strength and chemical corrosion resistance, but also has the disadvantages of easy pulverization, easy fracture, and non-softness; adding a second phase such as SiO 2 , ZrO 2 , B 2 o 3 , Fe 2 o 3 etc., can improve the internal structure and physical properties of the fiber; for example, mullite is Al 2 o 3 -SiO 2 As a stable binary compound, adding boron oxide can increase the nucleation density of mullite, promote the transformation of mullite (see: J.Europ.Ceram.Soc.1996,16:287) and reduce grain growth. [0003] Nextel TM -312 fiber is the first c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622D01F9/08
CPCC04B35/62236C04B2235/3409C04B2235/3418C04B2235/6562C04B2235/6567C04B2235/95C04B2235/96
Inventor 焦秀玲梁可可陈代荣贾玉娜
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com