Unlock instant, AI-driven research and patent intelligence for your innovation.

A composite spinel material with high infrared emissivity and its preparation method

A technology of infrared emissivity and spinel, which is applied in the field of composite spinel materials with high infrared emissivity and its preparation, can solve the problems of uneven heating process of materials, resource consumption, environmental pollution, etc., and achieve simple and efficient preparation methods , less energy consumption, low synthesis temperature

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesis of spinel infrared radiation materials under traditional process conditions often requires a long time under high temperature conditions, resulting in a great consumption of resources, and even the generation of toxic and harmful substances or gases during the process, polluting the environment, Moreover, the preparation process is complicated and the process is cumbersome, and the obtained materials are often unevenly distributed due to the uneven heating process, resulting in poor quality.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A composite spinel material with high infrared emissivity and its preparation method
  • A composite spinel material with high infrared emissivity and its preparation method
  • A composite spinel material with high infrared emissivity and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Mix magnesium nitrate and aluminum nitrate in a molar ratio of 1:2, then add deionized water with spherical graphite (mass ratio of magnesium nitrate to spherical graphite is 2:1) (deionized water is dissolved with aluminum nitrate and magnesium nitrate Complete, such as: the relationship between the amount of magnesium nitrate and deionized water is 1g:20mL), stir in a water bath at 60°C for 30 minutes; use ammonia water (pH of the original mixture is less than 3) in a water bath at 80°C to adjust the pH to 3, and stir 30min; Add ethyl orthosilicate (the molar ratio of ethyl orthosilicate to magnesium nitrate is 5:1), stir in a water bath at 90°C for 1h, slowly drop in 0.1mol / L NaOH solution until a gel is formed, and dry at 80°C After 3 hours, place it in a microwave oven (20KW microwave power, 2450±50MHz frequency) and heat it to 500°C, keep it warm for 10 minutes to obtain a primary coating powder; the stirring speed is 800rpm;

[0043] (2) Add ferric nitrate, m...

Embodiment 2

[0048] (1) Mix magnesium nitrate and aluminum nitrate according to the molar ratio of 1:2, then add deionized water (deionized water is dissolved with aluminum nitrate and magnesium nitrate) with spherical graphite (magnesium nitrate and spherical graphite mass ratio is 3:1) Completely, such as: the relationship between the dosage of magnesium nitrate and deionized water is 1g: 20mL), stir in a 70°C water bath for 30min; use ammonia water (the original pH of the mixture is less than 3) in a 80°C water bath to adjust the pH to 3, stir 30min; add ethyl orthosilicate (the molar ratio of ethyl orthosilicate and magnesium nitrate is 5:1), stir in a water bath at 90°C for 1 hour, slowly drop 0.15mol / L NaOH solution until a gel is formed, and dry at 100°C After 3h, place in a microwave oven (microwave power is 20KW, frequency is 2450±50MHz) and heat to 500°C, keep the temperature for 10min, and obtain a coating powder; the stirring speed is 800rpm;

[0049] (2) adding ferric nitrate,...

Embodiment 3

[0057] (1) Mix magnesium nitrate and aluminum nitrate according to the molar ratio of 1:2, then add deionized water (deionized water is dissolved with aluminum nitrate and magnesium nitrate) with spherical graphite (magnesium nitrate and spherical graphite mass ratio is 3:1) Completely, such as: the relationship between the dosage of magnesium nitrate and deionized water is 1g: 20mL), stir in a 70°C water bath for 30min; use ammonia water (the original pH of the mixture is less than 3) in a 80°C water bath to adjust the pH to 3, stir 30min; add ethyl orthosilicate (the molar ratio of ethyl orthosilicate and magnesium nitrate is 5:1), stir in a water bath at 90°C for 1 hour, slowly drop 0.15mol / L NaOH solution until a gel is formed, and dry at 100°C After 3h, place in a microwave oven (microwave power is 20KW, frequency is 2450±50MHz) and heat to 500°C, keep the temperature for 10min, and obtain a coating powder; the stirring speed is 800rpm;

[0058] (2) adding ferric nitrate,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of spinel infrared radiation materials and discloses a compound spinel material with high infrared emissivity and a preparation method thereof. The methodcomprises the following steps: (1) dispersing magnesium nitrate, aluminum nitrate and spherical graphite into water and regulating the pH (Potential of Hydrogen) to 3 to 4; adding tetraethyl orthosilicate and heating and stirring; dropping a strong alkali solution until gel is formed; drying and carrying out microwave treatment to obtain primary cladded powder; (2) dissolving iron nitrate, manganese nitrate, cobalt nitrate and copper nitrate into water to obtain a mixed solution; dispersing the primary cladded powder into water to obtain a dispersed solution; (3) uniformly mixing the mixed solution and the dispersed solution and adding a precipitating agent; regulating the pH to 9 to 10 and filtering; carrying out microwave heating on a solid and carrying out heat-preservation treatment toobtain the compound spinel material. The compound spinel material disclosed by the invention has a cavity structure and high infrared emissivity and is easy to spray; raw materials are simple and easy to obtain, the cost is relatively low, a preparation technology is simple and efficient and the energy consumption is less.

Description

technical field [0001] The invention belongs to the technical field of preparation of spinel infrared radiation materials, and in particular relates to a composite spinel material with high infrared emissivity and a preparation method thereof. Background technique [0002] Infrared radiation materials include low infrared emissivity materials, selective infrared radiation materials and high efficiency infrared radiation materials, including TiO 2 , SiO 2 , ZnO, cordierite, SiC, transition metal oxide composite materials, etc. can be used as infrared radiation materials, widely used in heat insulation materials, stealth materials, thermal insulation materials and energy saving and environmental protection fields. [0003] At present, the synthesis of spinel infrared radiation materials under traditional process conditions often requires a long time under high temperature conditions, resulting in a great consumption of resources, and even the generation of toxic and harmful s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44C04B35/628C04B35/66
CPCC04B35/44C04B35/62802C04B35/66C04B2235/3206C04B2235/3262C04B2235/3272C04B2235/3281
Inventor 王慧张顺刘霄昱
Owner SOUTH CHINA UNIV OF TECH