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Hollow gradient light-weight high-infrared-heat-barrier microsphere for high-temperature-resistant paint

An infrared heat and gradient technology, which is applied in the structure and preparation of anti-infrared radiation microspheres, the structure and preparation of lightweight high-infrared heat-blocking microspheres, can solve the problems of limited anti-infrared effect, and achieve high-temperature blocking infrared The effect of excellent radiation performance, low cost and simple process

Inactive Publication Date: 2014-04-30
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the anti-infrared effect of a single system of radiation-blocking materials is limited. If a multi-phase dense structure can be obtained through composition adjustment, its anti-infrared radiation performance can be greatly improved

Method used

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  • Hollow gradient light-weight high-infrared-heat-barrier microsphere for high-temperature-resistant paint
  • Hollow gradient light-weight high-infrared-heat-barrier microsphere for high-temperature-resistant paint

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A method for preparing hollow gradient ceramic microspheres, comprising the following process steps: dispersing 3g of SPS microspheres after sulfonation treatment in deionized water and stirring on a magnetic stirrer, dissolving 3g of PCS and 2g of tetrabutyl titanate in In tetrahydrofuran, add the mixed solution of the precursor dropwise into the stirred SPS aqueous solution, centrifuge and wash to obtain the mixture microspheres, put them in a vacuum oven at 80°C for 20 hours, dry and mature, and obtain the gradient ceramic precursor microspheres. Balls were sintered at 1200°C for 1h in a vacuum furnace to obtain hollow gradient ceramic microspheres, and their infrared extinction coefficient was measured to be 61.4m 2 / Kg.

Embodiment 2

[0024] A method for preparing hollow gradient ceramic microspheres, comprising the following process steps: dispersing 3g of SPS microspheres after sulfonation treatment in deionized water and stirring on a magnetic stirrer, dissolving 3g of PCS and 3g of tetrabutyl titanate in In tetrahydrofuran, add the mixed solution of the precursor dropwise to the stirring SPS aqueous solution, centrifuge and wash to obtain the mixture microspheres, put them in a vacuum oven at 100°C for 12 hours to dry and mature, and obtain PCS / TiO2 gradient ceramics Precursor microspheres were sintered in a vacuum furnace at 1300°C for 2 hours to obtain hollow SiC / TiO2 gradient ceramic microspheres, and their infrared extinction coefficient was measured to be 62.5m 2 / Kg.

Embodiment 3

[0026] A method for preparing hollow gradient ceramic microspheres, comprising the following process steps: dispersing 3g of sulfonated SPS microspheres in deionized water and stirring on a magnetic stirrer, dissolving 3g of PCS and 3g of tetrabutyl zirconate in In tetrahydrofuran, add the mixed solution of the precursor dropwise to the stirred SPS aqueous solution, centrifuge and wash to obtain the mixture microspheres, put them in a vacuum oven at 110°C for 15 hours to dry and mature to obtain PCS / ZrO 2 The gradient ceramic precursor microspheres were sintered in a vacuum furnace at 1250 °C for 1 h to obtain hollow SiC / ZrO 2 Gradient ceramic microspheres, and the measured infrared extinction coefficient is 63.1m 2 / Kg.

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Abstract

The invention relates to a hollow gradient light-weight high-infrared-heat-barrier microsphere structure for high-temperature-resistant paint and a preparation method thereof, belonging to the technical field of high temperature insulating materials. The ceramic microsphere structure is hollow; and the ceramic microsphere is composed of a MO2 (M=Ti, Zr) phase and a SiC phase, and the contents of the phase components form continuous gradient change in the radius direction. The microsphere is prepared by combination of seed precipitation and precursor conversion. The method comprises the following steps: sulfonating the crosslinked polystyrene (SPS) microsphere, dropwisely adding a polycarbosilane (PCS) / metal alkoxide mixed solution into the SPS water solution while stirring by a precipitation process, drying and aging to obtain a gradient ceramic precursor coated SPS solid microsphere; and sintering the solid microsphere in a vacuum furnace at 1000-1400 DEG C to obtain the hollow gradient ceramic microsphere. The microsphere has the advantages of simple preparation technique, excellent properties, favorable infrared heat barrier effect, wide applicability and the like.

Description

technical field [0001] The present invention relates to the structure and preparation method of a light-weight high-infrared heat-blocking microsphere, and more specifically, to the structure and preparation method of an anti-infrared radiation microsphere used for high-temperature heat-insulating coatings, which belongs to the high-temperature The field of thermal insulation materials. Background technique [0002] In order to protect the interior of the hot-end components from the high-temperature environment and prolong their service life, in recent years, the research and development of various high-temperature coatings have attracted more and more attention, especially in the fields of aerospace and aerospace vehicles. The demand for high temperature thermal insulation performance coating is more and more urgent. In recent years, people have continuously developed new low thermal conductivity materials. However, radiation heat transfer accounts for a large proportion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/46C04B35/48C04B35/622
Inventor 刘洪丽刘玉惠李婧李洪彦李亚静
Owner TIANJIN CHENGJIAN UNIV