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Bismuth oxychloride near-infrared high-reflective insulation pigment particle and preparation method

A technology of bismuth oxychloride and pigment particles, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve the problems of reduced reflection efficiency, decreased near-infrared reflectivity, and single color

Inactive Publication Date: 2017-09-29
BEIJING HUATENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a white pigment, rutile titanium dioxide exhibits good near-infrared reflection characteristics, but the near-infrared reflectance shows a downward trend in the range of 1000-2500nm, and the reflection efficiency decreases
Traditional bismuth oxychloride is white with a single color, and the near-infrared reflectance in the 1000-2500nm band range shows a downward trend and is also low

Method used

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  • Bismuth oxychloride near-infrared high-reflective insulation pigment particle and preparation method
  • Bismuth oxychloride near-infrared high-reflective insulation pigment particle and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Preparation of bismuth oxychloride near-infrared high-reflective heat-insulating pigment

[0027] According to Bi(NO 3 ) 3 5H 2 O, HCl, C 6 h 8 o 7 ·H 2 O molar ratio is 1:1:0.5 and the resulting mixture is dissolved in 100mL of water (wherein Bi(NO 3 ) 3 5H 2 The concentration of O is 0.01mol / L), adjust the pH=3 with concentrated hydrochloric acid, and then ultrasonically disperse for 30 minutes, then transfer the mixture into a polytetrafluoroethylene-lined autoclave with a volume of 300ml, seal it, put it into an oven, and keep At 100°C, react for 4h. Then, as the furnace cooled to room temperature, the product in the reactor was washed alternately with distilled water and absolute ethanol three times, and then the powder was dried in a vacuum oven at 70° C. for 12 hours. The obtained powder was then put into a mortar and ground for 10 minutes to obtain a white powder. The near-infrared spectrum measured embodiment 1 pigment sample is 82.0% at 1000nm-2500n...

Embodiment 2

[0029] Preparation of bismuth oxychloride near-infrared high-reflective heat-insulating pigment (a kind of bismuth oxychloride near-infrared high-reflective heat-insulation pigment 2 preparation) according to Bi(NO 3 ) 3 5H 2 O, KCl, C 6 h 8 o 7 ·H 2 O molar ratio is 1:1:0.5 and the resulting mixture is dissolved in 100mL of water (wherein Bi(NO 3 ) 3 5H 2 The concentration of O is 0.01mol / L), adjust the pH=3 with concentrated hydrochloric acid, and then ultrasonically disperse for 30 minutes, then transfer the mixture into a polytetrafluoroethylene-lined autoclave with a volume of 300ml, seal it, put it into an oven, and keep At 120°C, react for 5h. Then, as the furnace cooled to room temperature, the product in the reactor was washed alternately with distilled water and absolute ethanol three times, and then the powder was dried in a vacuum oven at 70° C. for 12 hours. Then the obtained powder was put into a mortar and ground for 10 minutes to obtain a khaki powder....

Embodiment 3

[0031] Preparation of bismuth oxychloride near-infrared high-reflective heat-insulating pigment (preparation of bismuth oxychloride near-infrared high-reflective heat-insulation pigment 3)

[0032] According to Bi(NO 3 ) 3 5H 2 O, NaCl, C 6 h 8 o 7 ·H 2 O molar ratio is 1:1:0.5 and the resulting mixture is dissolved in 100mL of water (wherein Bi(NO 3 ) 3 5H 2 The concentration of O is 0.01mol / L), adjust the pH=5 with concentrated hydrochloric acid, and then ultrasonically disperse for 30 minutes, then transfer the mixture into a polytetrafluoroethylene-lined autoclave with a volume of 300ml, seal it, put it into an oven, and keep At 100°C, react for 4h. Then, as the furnace cooled to room temperature, the product in the reactor was washed alternately with distilled water and absolute ethanol three times, and then the powder was dried in a vacuum oven at 70° C. for 12 hours. Then put it into a muffle furnace for calcination at 200°C for 2h. The obtained powder was th...

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Abstract

The invention discloses a bismuth oxychloride near-infrared high-reflection heat-insulating pigment particle and a preparation method thereof, belonging to the technical field of heat-insulating materials. Dissolve the mixture prepared by bismuth source, chlorine source, and protective agent in a solvent in a certain proportion, adjust the pH of the system, disperse ultrasonically for a period of time, then transfer the mixture into the reactor, seal it, put it in an oven, and keep it warm. Then, with the furnace cooling to room temperature, the product in the reactor was washed several times by centrifugation alternately with distilled water and absolute ethanol, and then the powder was dried in a vacuum oven at 70°C for 12 hours. After calcining at high temperature for a period of time, the obtained powder is put into a mortar and ground to obtain bismuth oxychloride high-reflection heat-insulating pigment particles. The preparation method of the present invention adopts a solvothermal method. The prepared near-infrared reflective pigment has good color performance, high yield, high near-infrared reflectivity, uniform particle size distribution, good structural stability, high reaction purity, short reaction cycle, easy control of the reaction process and the like.

Description

technical field [0001] The invention relates to a method for preparing a bismuth oxychloride high-reflective near-infrared heat-insulating pigment and its particles. The prepared pigment has a white to brown color, is environmentally friendly, and is used as a heat-shielding material with high reflective near-infrared radiation performance. It belongs to the technical field of thermal insulation materials. Background technique [0002] In an era when energy and the environment are of great concern, as the greenhouse effect continues to intensify, buildings or outdoor objects in cities, due to long-term sunlight, accumulate energy on the surface of the irradiated object, causing the internal temperature to sharply increase. raised. Especially in summer, too high indoor and ambient temperature will make people feel uncomfortable, and even a potential accident hazard, which will affect people's normal activities and increase the power consumption of cooling. Indoor air condit...

Claims

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Application Information

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IPC IPC(8): C01G29/00C09D7/12C08K3/18
CPCC01G29/00C01P2002/72C01P2002/82C01P2004/61C08K3/18
Inventor 陈宇景江韩航张群崔正王竹张春辉
Owner BEIJING HUATENG NEW MATERIAL CO LTD
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