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Nanometer ceramic heat-insulating film and preparation method thereof

A technology of nano-ceramic and heat-insulating film, which is applied in the field of ceramic processing, can solve problems such as high cost, unsuitable for popularization and application, and complicated preparation process, and achieve the effects of low cost, improved service life, and simple preparation process

Inactive Publication Date: 2014-01-29
GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

201210171490.2 discloses a nano-ceramic coating and its preparation method, the nano-ceramic coating is composed of CeO,, Y 2 o 3 and ZrO 2 Compared with the prior art, it has the advantage of denser coating, but its cost is high and the preparation process is complicated, so it is not suitable for popularization and application in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A nano-ceramic heat-insulating film, the parts by weight of each component are:

[0019] 8 parts of cerium oxide, 70 parts of silicon nitride, 6 parts of erbium oxide, 10 parts of aluminum oxide, 6 parts of titanium dioxide;

[0020] Its preparation method comprises the following steps:

[0021] The above-mentioned substances were configured into an emulsion with a mass fraction of 25% according to the stated ratio. After adding a certain amount of surfactant, ultrasonically dispersed for 1.5 hours, and then calcined at 750°C for 2 hours, a hard agglomerate was obtained. body, the particle size distribution is 15 nm; then the prepared nano-ceramic powder is evenly coated on the substrate, dried, and a safety layer with impact resistance is attached to the outside of the heat-insulating layer, and the nano-ceramic insulation layer can be obtained. hot film.

Embodiment 2

[0023] A nano-ceramic heat-insulating film, the parts by weight of each component are:

[0024] 5 parts of cerium oxide, 73 parts of silicon nitride, 8 parts of erbium oxide, 8 parts of oxide, 6 parts of titanium dioxide;

[0025] Its preparation method comprises the following steps:

[0026] The above-mentioned substances were configured into an emulsion with a mass fraction of 20% according to the stated ratio. After adding a certain amount of surfactant, ultrasonically dispersed for 1 hour, and then calcined at 750°C for 2 hours, a hard aggregate was obtained. , the particle size distribution is 15 nm; then the prepared nano-ceramic powder is evenly coated on the substrate, dried, and an impact-resistant safety layer is attached to the outside of the heat-insulating layer to obtain nano-ceramic heat-insulating membrane.

Embodiment 3

[0028] A nano-ceramic heat-insulating film, the parts by weight of each component are:

[0029] 5 parts of cerium oxide, 73 parts of silicon nitride, 6 parts of erbium oxide, 10 parts of aluminum oxide, 6 parts of titanium dioxide;

[0030] Its preparation method comprises the following steps:

[0031] The above substances were configured into an emulsion with a mass fraction of 20% according to the stated ratio. After adding a certain amount of surfactant, ultrasonically dispersed for 1 hour, and then calcined at 700°C for 3 hours, a hard aggregate was obtained. , the particle size distribution is 15 nm; then the prepared nano-ceramic powder is evenly coated on the substrate, dried, and an impact-resistant safety layer is attached to the outside of the heat-insulating layer to obtain nano-ceramic heat-insulating membrane.

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Abstract

The invention relates to a nanometer ceramic heat-insulating film and a preparation method thereof, and belongs to the technical field of ceramic machining. The nanometer ceramic heat-insulating film comprises the following components in parts by weight: 5-8 parts of cerium oxide, 70-75 parts of silicon nitride, 6-10 parts of erbium oxide, 5-10 parts of alumina and 5-8 parts of titanium dioxide. The preparation method comprises the following steps: preparing a 20-25wt% emulsion by using the components in proportion, adding a certain amount of surface active agent, carrying out ultrasonic dispersion for 1-1.5 hours, and calcining for 2 to 3 hours at the temperature of 750-780 DEG C, thus obtaining no-hard aggregates, the particle size distribution of which is 15-20nm; then uniformly coating prepared nanometer ceramic powder on a base material, drying, and attaching a safety layer with impact resistance to the outer side of a thermal insulating layer, thus obtaining the nanometer ceramic heat-insulating film. The nanometer ceramic heat-insulating film has good chemical stability, scraping resistance, good heat resistance and the characteristics of simple preparation technology and relatively low cost, can be used for effectively prolonging the service life of a carrier and is suitable for popularization and application in industries.

Description

technical field [0001] The invention relates to a heat-insulating film, in particular to a nano-ceramic heat-insulating film and a preparation method thereof, belonging to the technical field of ceramic processing. Background technique [0002] As one of the three pillars of materials, ceramic materials play a pivotal role in daily life and industrial production. However, due to the brittle texture, poor toughness and strength of traditional ceramic materials, its application has been greatly restricted. However, with the widespread application of nanotechnology, nano-ceramics are produced, hoping to overcome the brittleness of ceramic materials and make ceramics as flexible and machinable as metal. The so-called nano-ceramic refers to the ceramic material whose phase in the microstructure has a nanoscale scale, that is to say, the grain size, grain boundary width, second phase distribution, defect size, etc. are all at the nanoscale level. Because the interface occupies a ...

Claims

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Application Information

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IPC IPC(8): C04B35/584C04B35/622
Inventor 陈春水
Owner GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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