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Fiber-reinforced high-temperature-resistant thermal insulation and heat preserving ceramic coating and preparation method thereof

A technology of thermal insulation and fiber reinforcement, which is applied in the field of thermal insulation materials, can solve problems such as peeling, poor mechanical properties of coatings, and no toughness, etc., and achieves strong mechanical shear force, wide application range, and small thermal conductivity.

Inactive Publication Date: 2012-05-23
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is inorganic coatings, which can withstand high temperatures from 400°C to 1300°C. This type of coating is almost rigid and hard, with almost no toughness. The coating film is hard and brittle, and the coating has poor mechanical properties and is easy to crack and pulverize. , peeling
If it is used for thermal insulation of high-temperature pipelines, especially when the pipelines need to be mechanically connected, organic-inorganic composite coatings are tough but not suitable for poor temperature resistance. Although inorganic coatings can withstand high temperatures, they cannot be used due to the brittleness of the coating film. Destroyed by mechanically strong shearing forces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Weigh the raw materials according to the following weight ratio:

[0025] Epoxy and phenolic resin 35%, zirconia 10%, titanium dioxide 10%, heavy calcium 10%, aluminum silicate 5%, bentonite 4%, defoamer and dispersant 1%, coupling agent 2%, hollow Glass beads 10%, ceramic fiber 10%, thinner or thickener 3%.

[0026] 2. The method for preparing fiber-reinforced high-temperature-resistant thermal insulation ceramic coating using the above ratio is as follows:

[0027] Add the defoamer and the dispersant into the reaction kettle according to the proportion and mix them evenly; add zirconia, titanium dioxide, heavy calcium, aluminum silicate, bentonite in turn, add coupling agent, stir evenly, make a slurry, adjust the material The pH of the slurry is 8-10. Add ceramic fiber to the slurry, perform high-speed stirring and blue grinding to make the ceramic fiber uniformly dispersed in the slurry; add the mixture of epoxy resin and phenolic resin, add diluent or thickener, adju...

Embodiment 2

[0029] 1. Weigh the raw materials according to the following weight ratio:

[0030] Silicone resin and inorganic high temperature glue 40%, aluminum silicate 8%, talc 8%, alumina 4%, expanded perlite 2%, zinc oxide 6%, diatomaceous earth 5.5%, hollow glass beads 8%, 15% glass fiber, 1.5% dispersant and defoamer, 2% coupling agent.

[0031] 2. The method for preparing fiber-reinforced high-temperature-resistant thermal insulation ceramic coating using the above ratio is as follows:

[0032] Add the defoamer and the dispersant into the reaction kettle according to the proportion, and mix them evenly; add aluminum silicate, talc, alumina, expanded perlite, zinc oxide, diatomaceous earth, add coupling agent, and stir evenly to prepare Into slurry; add glass fiber to the slurry, perform high-speed stirring and blue grinding, so that the glass fiber is evenly dispersed in the slurry; add a mixture of silicone resin and inorganic high temperature glue, add diluent or thickener, adjust The...

Embodiment 3

[0034] 1. Weigh the raw materials according to the following weight ratio:

[0035] Inorganic high temperature glue 35%, zirconia 5%, titanium dioxide 10%, aluminum silicate 10%, mica powder 10%, bentonite 4%, alumina 6%, hollow ceramic beads 10%, carbon fiber 5%, defoamer 3%, coupling agent 2%.

[0036] 2. The method for preparing fiber-reinforced high-temperature-resistant thermal insulation ceramic coating using the above ratio is as follows:

[0037] Add the defoamer and the dispersant into the reaction kettle according to the proportion and mix them evenly; add zirconium oxide, titanium dioxide, aluminum silicate, mica powder, bentonite, and aluminum oxide in turn, add coupling agent, stir evenly, and make a slurry ; Add carbon fiber to the slurry, perform high-speed stirring and blue grinding to make the carbon fiber uniformly dispersed in the slurry; add inorganic high-temperature glue and diluent or thickener to adjust the slurry to a suitable viscosity; add hollow ceramic ...

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PUM

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Abstract

The invention relates to a high-temperature-resistant thermal insulation and heat preserving ceramic coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by weight: 30-50 percent of film forming substance, 30-40 percent of high-temperature-resistant filler, 10-15 percent of hollow micro beads, 2-5 percent of thermal insulation fiber and 2-8 percent of aid and solvent. The coating has the toughness of an organic coating and the rigidity and hardness of an inorganic coating, has high adhesion, can be used at the high temperature of 400-1,200 DEG C for a long time, and is resistant to chemical reagents, acids, alkalis and oil. A coating film has high surface intensity, and can bear strong shear force without being damaged when a high-temperature pipeline is required to be connected mechanically. The coating has excellent heat preserving performance, and the surface temperature of a pipeline of 350 DEG C can be lowered to be below 100 DEG C by coating the coating outside the pipeline in the thickness of 4-6 millimeters. The coating can be widely applied to heat-resistant protection of the inner and outer surfaces of equipment such as high-temperature steam pipelines, metallurgy high-temperature furnaces, high-temperature valves, high-temperature containers and the like.

Description

technical field [0001] The invention relates to a coating, in particular to a fiber-reinforced high-temperature-resistant heat-insulating ceramic coating and a preparation method thereof, belonging to the field of thermal insulation materials. Background technique [0002] At present, there are many heat-insulating coatings with high temperature resistance at home and abroad. The heat-insulating coatings used in high-temperature equipment (places) are organic-inorganic composite coatings made of organic resins as base materials and inorganic heat-insulating fillers. The temperature range is below 300°C, and this type of coating is soft, elastic or tough. One is inorganic coatings, which can withstand high temperatures from 400°C to 1300°C. This type of coating is almost rigid and hard, with almost no toughness. The coating film is hard and brittle, and the coating has poor mechanical properties and is easy to crack and pulverize. , peeling off. If it is used for thermal in...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D183/04C09D161/06C09D1/00C09D7/12
Inventor 魏丽
Owner SHENYANG LIGONG UNIV
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