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Heat-insulating ceramic fiber material and preparation method thereof

A ceramic fiber and thermal insulation material technology, applied in the field of material science, can solve the problems of unsatisfactory application occasions and high thermal conductivity, and achieve the effect of improving thermal insulation performance and simple process

Inactive Publication Date: 2012-10-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of such fiber products is relatively high, which cannot meet the requirements of some applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) According to the experimental plan, the molar ratio of ferric nitrate, chromium nitrate and deionized water is 1:1:6 to make a mixed solution in a beaker, and mix evenly to form A liquid;

[0021] (2) Add citric acid to 5 times the molar amount of ethylene glycol to make solution B;

[0022] (3) Slowly add liquid B to liquid A at a ratio of A / B volume ratio of 2, stir evenly, and make liquid C, heat and stir solution C in a water bath at 60°C, and after stirring for 1 hour, a stable the sol;

[0023] (4) Fully impregnate the ceramic fiber in the above sol with a mass ratio of sol / ceramic fiber of 3 for 20 minutes;

[0024] (5) Put the ceramic composite fiber with sol on the surface in an oven, and dry it at 60°C until completely dried;

[0025] (6) Put the composite fiber in a muffle furnace and heat it up to 250°C at 4°C / min, then hold it for 1 hour, then raise the temperature to 600°C at the same rate, hold it for 1 hour, and finally cool it to room temperature ...

Embodiment 2

[0027] (1) According to the experimental plan, the molar ratio of ferric nitrate, chromium nitrate and deionized water is 1:1:8 to make a mixed solution in a beaker, and mix evenly to form A liquid;

[0028] (2) Add citric acid to 6 times the molar amount of ethylene glycol to make solution B;

[0029] (3) Slowly add liquid B to liquid A at a ratio of A / B volume ratio of 3, stir evenly, and make liquid C, heat and stir solution C in a water bath at 60°C, and after stirring for 2 hours, a stable the sol;

[0030] (4) Fully impregnate the ceramic fiber in the above sol with a mass ratio of sol / ceramic fiber of 4 for 25 minutes;

[0031] (5) Put the ceramic composite fiber with sol on the surface in an oven, and dry it at 70°C until completely dried;

[0032] (6) Put the composite fiber in the muffle furnace and heat it up to 250°C at 5°C / min, then keep it warm for 1h, then raise the temperature to 600°C at the same rate, then keep it warm for 1h, and finally cool down to room ...

Embodiment 3

[0034] (1) According to the experimental plan, the molar ratio of ferric nitrate, chromium nitrate and deionized water is 1:1:10 to make a mixed solution in a beaker, and mix evenly to form A liquid;

[0035] (2) Add citric acid to 4 times the molar amount of ethylene glycol to make solution B;

[0036] (3) Slowly add liquid B to liquid A at a ratio of A / B volume ratio of 4, stir evenly, and make liquid C, heat and stir solution C in a water bath at 60°C, and after stirring for 3 hours, a stable the sol;

[0037] (4) Fully impregnate the ceramic fiber in the above sol with a mass ratio of sol / ceramic fiber of 5 for 30 minutes;

[0038] (5) Put the ceramic composite fiber with sol on the surface in an oven, and dry it at 60°C until completely dried;

[0039] (6) Put the composite fiber in a muffle furnace and heat it up to 250°C at 4°C / min, then keep it warm for 1 hour, then raise the temperature to 600°C at the same rate, keep it warm for 1 hour, and finally cool down to roo...

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PUM

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Abstract

The invention relates to a heat-insulating ceramic fiber material and a preparation method thereof. The preparation method comprises the following steps: mixing ferric nitrate and chromium nitrate with deionized water, citric acid and ethylene glycol into sol, dipping ceramic fiber into the sol, and taking out and drying as well as carrying out heat treatment at the temperature of 250 to 600 DEG C to obtain the heat-insulating ceramic fiber material coated with high near infrared reflecting pigment layer. The heat-insulating ceramic fiber material and the preparation method have the advantages that the process is simple, the thermal conductivity of the materials manufactured is low and can reach 0.048W / (M.K), and the heat-insulating effect is good.

Description

technical field [0001] The invention relates to a ceramic fiber thermal insulation material and a preparation method thereof, belonging to the technical field of material science. Background technique [0002] Ceramic fiber products have been widely used in aerospace and other fields in recent years due to their good high-temperature thermal insulation properties. With the rapid development of technologies such as aerospace and advanced weapons and equipment, the demand for low thermal conductivity heat insulation materials is becoming more and more urgent, and the performance requirements for heat insulation materials are also getting higher and higher. With the development of high-tech equipment such as ultra-high-speed aircraft and high-power engines, the problem of heat insulation has become a hot spot that people pay more and more attention to, and it has also become one of the key factors restricting the development of high-tech equipment. For many industrial equipmen...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85
Inventor 张玉军谭砂砾王翠玲龚红宇张潇予张炎
Owner SHANDONG UNIV
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