Nano tungsten doped tin dioxide powder and preparation method thereof

A technology of tin dioxide and nano-tungsten, which is applied in the field of nano-materials, can solve the problems of low visible light transmittance and poor heat insulation of powder, and achieve good dispersion, good thermal stability and simple production process.

Inactive Publication Date: 2019-04-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor heat insulation and low transmittance of visible light at present, the prese

Method used

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  • Nano tungsten doped tin dioxide powder and preparation method thereof
  • Nano tungsten doped tin dioxide powder and preparation method thereof
  • Nano tungsten doped tin dioxide powder and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] (1) Dissolve tin tetrachloride and ammonium metatungstate in deionized water to prepare a precursor with a concentration of 0.01mol / L, and the molar ratio of ammonium metatungstate to tin tetrachloride is 1:100;

[0020] (2) Pour the precursor into an ultrasonic atomizer for atomization, using air as the carrier gas, and the carrier gas passes the atomized droplets into a tube furnace for pyrolysis at 200 °C;

[0021] (3) Collect tungsten-doped tin dioxide powder with deionized water, and dry the collected powder at 50°C;

[0022] (4) Anneal the dried powder at 200°C for 10 hours, and then prepare nano-tungsten-doped tin dioxide powder after cooling. The UV-visible-infrared light transmittance spectrum curve of the powder is shown in image 3 , it can be seen from the figure that the transmittance of visible light is 70%-90%, and the transmittance of some visible light bands can reach 90%, while the transmittance of near infrared can also be kept at a low value.

Embodiment 2

[0024] (1) Dissolve tin tetrachloride and ammonium metatungstate in deionized water to prepare a precursor with a concentration of 0.15mol / L, and the molar ratio of ammonium metatungstate to tin tetrachloride is 5:100;

[0025] (2) Pour the precursor into an ultrasonic atomizer for atomization, using air as the carrier gas, and the carrier gas passes the atomized droplets into a tube furnace for pyrolysis at 600 °C;

[0026] (3) Collect tungsten-doped tin dioxide powder with deionized water, and dry the collected powder at 50°C;

[0027] (4) The dried powder was annealed at 600°C for 3 hours, and the nano-tungsten-doped tin dioxide powder was obtained after cooling. The scanning electron microscope (SEM) picture of the powder is shown in figure 2 , it can be seen from the figure that it is a nano-spherical powder, and the UV-visible-infrared light transmittance spectrum curve of the powder is shown in image 3 , it can be seen from the figure that the transmittance of visibl...

Embodiment 3

[0029] (1) Dissolve tin tetrachloride and ammonium metatungstate in deionized water to prepare a precursor with a concentration of 1.5mol / L, and the molar ratio of ammonium metatungstate to tin tetrachloride is 40:100;

[0030] (2) Pour the precursor into an ultrasonic atomizer for atomization, using air as the carrier gas, and the carrier gas passes the atomized droplets into a tube furnace for pyrolysis at 700 °C;

[0031] (3) Collect tungsten-doped tin dioxide powder with deionized water, and dry the collected powder at 50°C;

[0032] (4) Anneal the dried powder at 1000°C for 1 hour, and prepare nano-tungsten-doped tin dioxide powder after cooling. The UV-visible-infrared light transmittance spectrum curve of the powder is shown in image 3 , it can be seen from the figure that the transmittance of visible light is 70%-90%, and the transmittance of near infrared can also be kept at a low value.

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Abstract

The invention discloses a preparation method of nano tungsten doped tin dioxide powder and a preparation method thereof. The method includes the following steps that tin tetrachloride and ammonium metatungstate are used for preparing a precursor solution and loaded into an ultrasonic atomizer, air serves as a carrier, the carrier assists the introduction of atomized droplets in a tubular furnace for pyrolysis, deionized water is used for collecting SnO2:W powder, the collected powder is dried and annealed at 100-1200 DEG C for 0.5-10 h, and the nano tungsten doped tin dioxide powder is prepared. Compared with the prior art, the prepared powder has high visible light transmittance, high infrared and ultraviolet block rate and good heat insulation performance. The prepared spherical powder has uniform particle size distribution and is not easy to agglomerate. The powder has broad application prospects in many fields such as solar cell materials, semiconductor gas and moisture sensitive components, electronic screens and transparent coatings.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a nanometer tungsten-doped tin dioxide (SnO 2 :W) Powder and its preparation process by ultrasonic atomization. Background technique [0002] From the windshields of automobiles, trains, and airplanes used in people's daily travels to the glass walls of commercial buildings and family houses, glass has been widely used; The problem has attracted attention. Sunlight is divided into infrared light, visible light and ultraviolet light. Ultraviolet light accounts for 5% of the solar radiation energy. The irradiation of ultraviolet light will aggravate the aging of indoor furniture, which will cause the loss of skin tension and premature aging; infrared light accounts for 50% of the solar radiation energy. Infrared light irradiation increases the heat in the room, the heat continuously enters the room in summer and causes the temperature to rise, and the heat is released in winter to ca...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G19/02C01P2004/32
Inventor 贾庆明刘洋陕绍云支云飞苏红莹
Owner KUNMING UNIV OF SCI & TECH
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