A stable mosi in high temperature air 2 -sio 2 Composite photothermal coating and preparation method thereof

A high-temperature air and compound technology, applied in coatings, radiation-absorbing coatings, fire-retardant coatings, etc., can solve problems such as the need to improve high-temperature stability, unsuitable for long-term stable use, and complex equipment required for production. Production, suitable for large-scale production, good high temperature stability

Active Publication Date: 2020-12-25
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0008] There are following technical problems in existing prior art: (1) high temperature stability needs to be improved
(2) The composition of the material is complex, the production cost is high, and the equipment required for production is complicated, which is not conducive to large-scale production
(3) A vacuum environment is required, and it is not suitable for long-term stable use

Method used

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  • A stable mosi in high temperature air <sub>2</sub> -sio <sub>2</sub> Composite photothermal coating and preparation method thereof
  • A stable mosi in high temperature air <sub>2</sub> -sio <sub>2</sub> Composite photothermal coating and preparation method thereof
  • A stable mosi in high temperature air <sub>2</sub> -sio <sub>2</sub> Composite photothermal coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] refer to figure 1 MoSi shown 2 -SiO 2 Schematic diagram of the composite coating preparation process,

[0034] A certain amount of molybdenum powder and silicon powder are subjected to high-energy ball milling reaction according to the molar ratio of Mo:Si=1:3, and the process is carried out for 10 hours to obtain MoSi 2 powder.

[0035] Silica sol is prepared by hydrolysis and polycondensation of tetraethyl silicate (TEOS). Tetraethylsilicate (TEOS), methyltriethoxysilane (MTES), ethanol, deionized water and acetic acid were respectively added to 100ml round in the bottom flask. Magnetically stirred at room temperature for 24 hours to obtain a transparent silica sol.

[0036] The prepared silica sol and MoSi 2 Powder mixing (1ml silica sol with 0.1g MoSi 2 powder), spin-coat on stainless steel (SUS-304) after forming a black suspension, and dry in an oven at 80°C for half an hour. This step was repeated twice. Then, the transparent silica sol (volume 1ml) was...

Embodiment 2

[0039] 0.1g MoSi2 powder mixes 2ml silica sol, the coating absorption that adopts the exact same method of embodiment 1 to obtain is lower, and reflection spectrum sees Figure 4 "---"curve.

Embodiment 3

[0041] 0.2g MoSi 2 The powder is mixed with 1ml of silica sol, and the coating obtained by the same method as in Example 1 has low absorption, and the reflection spectrum is shown in Figure 4 "……"curve.

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Abstract

The invention belongs to the technical field of material preparation, and concretely relates to a MoSi2-SiO2 compound photothermal coating being stable in high temperature air, and a preparation method thereof. The method comprises the following steps: mixing silica sol with MoSi2 powder to form a black suspension, spin-coating a carrier with the black suspension, drying the applied black suspension to obtain a composite layer, and spin-coating the composite layer with the prepared silica sol to form an anti-reflection coating in order to obtain the composite photothermal coating. The coatingprovided by the invention has the advantages of good high temperature stability, simple preparation process, low cost, and suitableness for large-scale production, and also has a high solar absorptionrate and great practical values. The preparation method of the coating is universal, and can be used to prepare functional coatings with different filling materials.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a stable MoSi in high-temperature air 2 -SiO 2 Composite photothermal coating and its preparation method. Background technique [0002] Solar photothermal absorbing coating is a functional coating capable of realizing photothermal conversion, which can be used in many fields such as solar thermal utilization and thermal collector solar power generation. Solar energy has many advantages such as clean and pollution-free, low cost, abundant reserves, etc. It has great development potential as an alternative energy source to traditional energy sources. The most common solar energy utilization technologies can be roughly divided into two types: solar thermal and photovoltaic. Among them, photothermal technology has many advantages such as high energy utilization rate, low cost, and simple equipment. In recent years, low-temperature photothermal technologie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/32
CPCC09D1/00C09D5/18C09D5/32
Inventor 曹峰刘一杰张倩伍作徐张宗委魏东
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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