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MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material and preparation method thereof

A technology of zirconia fiber and heat insulation materials, which is applied in the field of heat insulation materials preparation, and can solve problems such as harsh aerodynamic environments

Active Publication Date: 2015-05-06
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the aircraft flies at high speed, the aerodynamic environment caused by the dynamic friction between the aircraft surface and the atmosphere is extremely harsh, and a large amount of heat will be transferred to the interior of the system through the aircraft surface

Method used

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  • MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material and preparation method thereof
  • MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material and preparation method thereof
  • MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0023] (1) with silicon dioxide (SiO 2 ) and borax (Na 2 B 4 o 7 10H 2 O) is raw material, according to mass percentage: 70%, 30% weighing, the container that is equipped with mixed material is placed on the roller mill and mixes 12h, makes raw material mix evenly. Then put the mixture into a platinum crucible, keep it warm at 1450°C for 4 hours, take it out immediately, put it in water and quench it, and make a borosilicate glass frit. Use a vibrating mill to grind for 10 seconds, and crush it to borosilicate glass powder with a particle size of about 50 μm.

[0024] (2) Molybdenum disilicide (MoSi 2 ), borosilicate glass powder (BSG) as raw materials, according to the mass percentage: 20%, 80% weighing. Put the weighed raw materials into a nylon ball mill jar with ethanol as the medium, and the mass ratio of raw materials / ethanol is 1:1. A planetary ball mill was used to mill for 24 hours to obtain a slurry, wherein the particle size of the mixture was 5 μm. At the s...

example 2

[0026] (1) with silicon dioxide (SiO 2 ) and borax (Na 2 B 4 o 7 10H 2 O) is raw material, according to mass percentage: 90%, 10% weighing, the container that is equipped with mixed material is placed on the roller mill and mixes 24h, makes raw material mix evenly. Then put the mixture into a platinum crucible, keep it warm at 1550°C for 5 hours, take it out immediately, put it in water and quench it, and make a borosilicate glass frit. Use a vibrating mill to grind for 20s, and crush it to borosilicate glass powder with a particle size of about 30 μm.

[0027] (2) Molybdenum disilicide (MoSi 2 ), borosilicate glass powder (BSG) and silicon hexaboride (SiB 6 ) is raw material, according to mass percent: 40%, 57.5%, 2.5% weighing. Put the weighed raw materials into a nylon ball mill jar with ethanol as the medium, and the mass ratio of raw materials / ethanol is 1:1. A planetary ball mill was used to mill for 48 hours to obtain a slurry, wherein the particle size of the m...

example 3

[0029] (1) with silicon dioxide (SiO 2 ) and borax (Na 2 B 4 o 7 10H 2 O) is raw material, is: 85%, 15% weighing according to mass percentage, and the container that is equipped with compound is placed on the roller mill and mixes 24h, makes raw material mix evenly. Then put the mixture into a platinum crucible, keep it warm at 1500°C for 5 hours, take it out immediately, put it into water and quench it to make a borosilicate glass frit. Use a vibrating mill to grind for 15 seconds, and crush it to borosilicate glass powder with a particle size of about 40 μm.

[0030] (2) Molybdenum disilicide (MoSi 2 ), borosilicate glass powder (BSG) and silicon hexaboride (SiB 6 ) as raw material, according to mass percentage: 60%, 35%, 5% weighing. Put the weighed raw materials into a nylon ball mill jar with ethanol as the medium, wherein the mass ratio of raw materials / ethanol is 3:2. A planetary ball mill was used to mill for 36 hours to obtain a slurry, wherein the particle si...

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Abstract

The invention belongs to the field of preparation of heat insulating materials, and relates to a MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material and a preparation method thereof. The preparation method comprises the following steps: preparing borosilicate glass by taking silicon dioxide and borax as raw materials; then preparing a MoSi2-BSG coating on the surface of a zirconium oxide fiberboard by taking molybdenum disilicide as a radiation agent, the borosilicate glass as a bonding agent, silicon hexaboride as a sintering aid and ethanol as a dispersant through a slurry immersion method, thereby finally obtaining the MoSi2-BSG coated zirconium oxide fiberboard integrated heat insulating material. The surface coating of the integrated heat insulating material infiltrates into a substrate material for 0.5-2mm, the emissivity is more than 0.8, and the temperature resistance at least can reach more than 1400 DEG C, so that the integrated heat insulating material has excellent heat insulating property, thermal shock resistance and bonding property.

Description

technical field [0001] The invention belongs to the field of heat insulation material preparation and relates to a MoSi 2 -BSG coated zirconia fiberboard integrated heat insulation material and its preparation method. Background technique [0002] With the continuous development of aerospace technology and new military and national strategic needs. Hypersonic aircraft has become a research hotspot in the aerospace departments of various countries, and it is also the focus and trend of the development of new weapon systems and aircraft in my country. However, when the aircraft flies at high speed, the aerodynamic environment caused by the dynamic friction between the aircraft surface and the atmosphere is extremely harsh, and a large amount of heat will be transferred to the interior of the system through the aircraft surface. Therefore, higher requirements are put forward for the thermal protection system of the aircraft. The radiant thermal protection system is a high em...

Claims

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Application Information

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IPC IPC(8): C04B41/50
Inventor 沈晓冬邵高峰崔升吴晓栋
Owner NANJING UNIV OF TECH
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