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Preparation method of modified carbon fiber-reinforced composite ceramic

A fiber-reinforced composite and modified carbon technology, applied in the field of aluminum electrolysis, can solve the problems of the inability to effectively improve the mechanical properties of the ceramic matrix, the poor wettability of the metal coating and the ceramic matrix, and the reduction of the original strength of the carbon fiber, etc. To achieve the effect of promoting sintering, strengthening the interface strength, and increasing the interface bonding force

Inactive Publication Date: 2013-05-15
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high temperature oxidation process greatly reduces the original strength of the carbon fiber, and the wettability of the metal coating and the ceramic substrate is not good, resulting in many gaps at the interface between the carbon fiber and the ceramic substrate, and the stress on the ceramic substrate cannot be effectively transmitted. to the carbon fiber, so the mechanical properties of the ceramic matrix cannot be effectively improved

Method used

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  • Preparation method of modified carbon fiber-reinforced composite ceramic
  • Preparation method of modified carbon fiber-reinforced composite ceramic

Examples

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Embodiment 1

[0016] Embodiment 1, its concrete steps are:

[0017] (1) Clean the carbon fiber and soak it in concentrated nitric acid for 5 minutes, then wash it with deionized water to remove excess nitric acid attached to the surface;

[0018] (2) Separately heat zinc acetate ethanol solution and NaOH ethanol solution with a molar concentration of 0.01M to 65°C, mix them in equimolar ratio, stir for 1 hour, and make a stable ZnO sol;

[0019] (3) Immerse the carbon fiber in ZnO sol for 10 minutes, take it out and dry it at 120°C for 10 minutes, then repeat the dipping and pulling twice, and pre-set ZnO seeds on the carbon fiber;

[0020] (4) Pour the zinc nitrate solution and the hexamethylenetetramine solution with a molar concentration of 12mM into the beaker, mix them evenly to make a growth solution, put the carbon fiber pre-prepared with ZnO seeds into the growth solution and Put it in a water bath, keep it warm at 90°C for 4 hours, take it out and wash it repeatedly, and then dry ...

Embodiment 2

[0025] (1) After cleaning the carbon fiber, soak it in concentrated nitric acid for 8 minutes, and then wash it with deionized water to remove excess nitric acid attached to the surface;

[0026] (2) Separately heat zinc acetate ethanol solution and NaOH ethanol solution with a molar concentration of 0.2M to 65°C, mix them in equimolar ratio, stir for 2 hours, and make a stable ZnO sol;

[0027] (3) Immerse the carbon fiber in ZnO sol for 5 minutes, take it out and dry it at 100°C for 20 minutes, then repeat the dipping and pulling twice, and pre-set ZnO seeds on the carbon fiber;

[0028](4) Pour equimolar zinc sulfate solution and hexamethylenetetramine solution with a molar concentration of 1mM into a beaker, mix well to make a growth solution, put the carbon fiber pre-prepared with ZnO seeds into the growth solution and Put it in a water bath, keep it warm at 80°C for 2 hours, take it out and wash it repeatedly, and then dry it at 70°C to obtain a ZnO nanowire array film o...

Embodiment 3

[0032] (1) Clean the carbon fiber and soak it in concentrated nitric acid for 6 minutes, then wash it with deionized water to remove excess nitric acid attached to the surface;

[0033] (2) Separately heat zinc acetate ethanol solution and NaOH ethanol solution with a molar concentration of 0.1M to 65°C, mix them in equimolar ratio, stir for 1.5h, and make a stable ZnO sol;

[0034] (3) Immerse the carbon fiber in ZnO sol for 7 minutes, take it out and dry it at 110°C for 15 minutes, then dip and pull it once, and pre-set ZnO seeds on the carbon fiber;

[0035] (4) Pour equimolar zinc chloride solution and hexamethylenetetramine solution with a molar concentration of 25mM into a beaker, mix evenly to make a growth solution, put the carbon fiber pre-prepared with ZnO seeds into the growth solution and then Put them together in a water bath, keep them warm at 85°C for 8 hours, take them out and wash them repeatedly, and then dry them at 100°C to obtain a ZnO nanowire array film ...

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Abstract

The invention provides a preparation method of modified carbon fiber-reinforced composite ceramic. The preparation method comprises the following steps: (1) placing carbon fiber into concentrated nitric acid, soaking and then washing with deionized water; (2) heating an ethanol solution of zinc acetate and the ethanol solution of NaOH to 65 DEG C, then mixing in equal molar ratio to prepare a ZnO sol; (3) dipping and lifting the carbon fiber in the ZnO sol for 2-3 times and pre-placing a ZnO crystal seed; (4) mixing a zinc salt solution and a hexamethylene tetramine solution in equal molar ratio to prepare a growth solution, placing the carbon fiber provided with the ZnO crystal seed into the growth solution, firstly performing heat preservation at the temperature of 80-90 DEG C, then washing, and drying to get a ZnO nano-wire array thin film growing on the carbon fiber in the fixed direction; (5) placing NiO and Fe2O3 on a planet mill for wet milling so as to form slurry, drying the slurry, and then pre-burning to get NiFe2O4-based ceramic powder; and (6) taking the NiFe2O4-based ceramic powder, additionally adding the short-cut carbon fiber after modification, performing dry pressing and forming, then placing into a multifunctional sintering furnace, and sintering under the protection of nitrogen to get the modified carbon fiber-reinforced composite ceramic.

Description

technical field [0001] The invention relates to a preparation method of modified carbon fiber reinforced composite ceramics, belonging to the technical field of aluminum electrolysis. Background technique [0002] At present, traditional aluminum electrolysis still uses carbon anode materials, which will release a large amount of greenhouse effect gases during the electrolysis process and pollute the environment. Moreover, frequent replacement of anode materials is required, which increases production costs. Starting from saving energy, reducing production costs, and eliminating environmental pollution caused by aluminum electrolysis, people have some new ideas on the design of aluminum electrolytic cells. In the past thirty years, researchers have been working on the development of aluminum electrolysis technology using inert electrode system, the core of which is the research on inert anode materials. After the 1980s, research on inert anode materials for aluminum electr...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/26C04B35/622
Inventor 焦万丽张磊
Owner SHANDONG UNIV OF TECH
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