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Preparation method and application of nanocrystalline tungsten bronze

A technology of tungsten bronze and nanocrystals, which is applied in the field of preparation of tungsten bronze nanomaterials, can solve the problems of large particle size and unstable transparent heat insulation performance, and achieve the effects of small particles, good transparent heat insulation stability, and environmentally friendly prices

Pending Publication Date: 2022-07-15
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of nanocrystalline tungsten bronze to solve the problems of large particle size and unstable transparent heat insulation performance of tungsten bronze nanomaterials

Method used

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  • Preparation method and application of nanocrystalline tungsten bronze
  • Preparation method and application of nanocrystalline tungsten bronze
  • Preparation method and application of nanocrystalline tungsten bronze

Examples

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preparation example Construction

[0031] The preparation method of nanocrystalline tungsten bronze provided by one aspect of the present invention comprises the following steps:

[0032] S1. Dissolve one or more of alkali metal compounds, alkaline earth metal compounds, rare earth compounds and tungstate in water, stir and mix;

[0033] S2, the mixture obtained in step S1 is placed in a drying oven to dry, and then ground to obtain a solid product;

[0034] S3, placing the solid product obtained in step S2 in a high-temperature furnace, feeding nitrogen-hydrogen mixed gas, and reacting at 400-1200 ° C for 10-1200 min;

[0035] S4. The solid product obtained after the reaction in step S3 is placed in an inert protective atmosphere to continue the reaction to obtain nanocrystalline tungsten bronze.

[0036] Specifically, in step S1, the chemical formula of the tungsten bronze is M x WO 3 , wherein 0<x<1, M is at least one of alkali metals, alkaline earth metals or rare earth elements.

[0037] Specifically, ...

Embodiment 1

[0048] The preparation method of nanocrystalline lanthanum tungsten bronze provided by the present invention comprises the following steps:

[0049]S1. Take 0.0858g of lanthanum chloride and 0.6375g of ammonium tungstate, put these two medicines into 100ml of deionized water, stir in a magnetic stirrer for 1 hour, and stir evenly;

[0050] S2, put the obtained mixture into a constant temperature drying oven, dry at 180°C for 8h, take out the powder and grind for 30min;

[0051] S3. Put the powder into a tube furnace, heat up to 500°C, and at the same time fill with nitrogen-hydrogen mixture (95 / 5) for reduction for 1h; then heat up to 800°C, introduce nitrogen, and keep for 1h to obtain nanocrystalline lanthanum tungsten bronze.

Embodiment 2

[0064] The nanocrystalline lanthanum tungsten bronze prepared in Example 1 was made into a thermal insulation coating glass, and the thermal insulation effect of the lanthanum tungsten bronze coating glass was tested.

[0065] The production method of lanthanum tungsten bronze coated glass:

[0066] S1. Dissolve 0.2 g of the nanocrystalline lanthanum tungsten bronze prepared in Example 1 in 20 ml of ethanol solution, ultrasonically disperse for 30 min, then add 5 g of PVB resin under strong magnetic stirring, and stir for 20 min to obtain a coating slurry.

[0067] S2. Place a glass sheet on the spin coater, rotate at a speed of 2000r / min, drop the prepared coating slurry on the glass sheet and rotate for 40s to obtain the coated glass, and finally keep the coated glass at 40°C for 1 hour to Remove residual liquid.

[0068] Test method for the performance of lanthanum tungsten bronze coated glass: place the prepared lanthanum tungsten bronze coated glass and blank glass on th...

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Abstract

The invention belongs to the technical field of functional nano materials, and particularly relates to a preparation method and application of nanocrystalline tungsten bronze. A solid-phase reaction method is adopted, one or more of an alkali metal compound, an alkaline earth metal compound and a rare earth compound and tungstate are dissolved in water, the mixture is stirred and mixed evenly and then placed in a drying oven to be dried, an obtained solid product is placed in a high-temperature furnace filled with nitrogen and hydrogen mixed gas, a reaction is carried out for 10-1200 min at the temperature of 400-1200 DEG C, then the solid product is placed in inert gas to continue to react for 10-1200 min, and a product is obtained. The nanocrystalline tungsten bronze is obtained. The raw materials used in the preparation method are low in cost and environmentally friendly, the prepared nanocrystalline tungsten bronze is small in particle and good in transparency and heat insulation stability, the preparation process is simple, and large-scale production is easy.

Description

technical field [0001] The invention belongs to the technical field of functional nanomaterials, and in particular relates to a preparation method and application of a tungsten bronze nanomaterial. Background technique [0002] With the rapid development of the automotive industry and the increase in the area of ​​automotive glass, in order to reduce the energy consumption of air conditioners, the demand for highly transparent insulating glass is also increasing. The highly transparent heat insulating material for windows can selectively transmit most of the visible light in the sunlight, and has a strong absorption of ultraviolet and near-infrared light, so as to play a transparent heat insulating effect. Currently, commonly used materials with transparent thermal insulation properties are mainly concentrated on materials such as antimony tin oxide (ATO), indium tin oxide (ITO) or rare earth hexaborides, and these materials have some limitations of their own. For example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y40/00C03C17/00
CPCC01G41/00C01G41/006B82Y40/00C03C17/009C01P2002/72C01P2004/03C01P2002/84C01P2004/64C01P2004/62C03C2217/445C03C2217/475C03C2217/70C03C2218/116
Inventor 潮洛蒙李佳新马永红
Owner INNER MONGOLIA UNIV OF SCI & TECH
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