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Preparation method of cesium tungstate nanopowder

A nano-powder, cesium tungstate technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as difficult and low-cost applications, and achieve the effects of high production efficiency, light degree of agglomeration and low cost

Active Publication Date: 2014-12-10
宁波今心新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, cesium tungstate nanopowder has been used in many industries as a nanopowder with outstanding near-infrared absorption and visible light transmission characteristics. field application

Method used

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  • Preparation method of cesium tungstate nanopowder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of cesium tungstate nanopowder is characterized in that comprising the following steps:

[0018] A. Dissolve the reaction amount of ammonium paratungstate as tungsten raw material and cesium carbonate as cesium raw material in methanol solvent, dry the above solution to obtain powder, and then further pulverize the obtained powder to obtain tungsten and cesium mixed powder. The pulverization here can adopt conventional pulverization methods, such as mechanical pulverization (such as ball mill pulverization), jet pulverization, etc.; the drying here can also adopt conventional drying methods, such as oven drying, spray drying, freeze drying or boiling drying, etc.

[0019] B. Place the mixed powder of tungsten and cesium in a closed reaction kettle with stirring, and add sorbitol as a reaction solvent to it, and stir and react for 6 hours at 300 ° C. The quality of the reaction solvent is the mixed powder of tungsten and cesium 2 times the mass;

[...

Embodiment 2

[0022] A preparation method of cesium tungstate nanopowder is characterized in that comprising the following steps:

[0023] A. Dissolve the reaction amount of ammonium paratungstate as tungsten raw material and cesium nitrate as cesium raw material in solvent ethanol, dry the above solution to obtain powder, and then further pulverize the obtained powder to obtain tungsten and cesium mixed powder. The pulverization here can adopt conventional pulverization methods, such as mechanical pulverization (such as ball mill pulverization), jet pulverization, etc.; the drying here can also adopt conventional drying methods, such as oven drying, spray drying, freeze drying or boiling drying, etc.

[0024] B. Put the mixed powder of tungsten and cesium in a closed reaction kettle with stirring, and add diethylene glycol as a reaction solvent to it, and stir and react for 4 hours at 180 ° C. The quality of the reaction solvent is tungsten and cesium. 1.2 times the powder mass;

[0025] ...

Embodiment 3

[0027] A preparation method of cesium tungstate nanopowder is characterized in that comprising the following steps:

[0028] A. Dissolve the reaction amount of ammonium paratungstate as tungsten raw material and cesium sulfate as cesium raw material in n-propanol solvent, dry the above solution to obtain powder, and then further pulverize the obtained powder to obtain tungsten and cesium mixed powder . The pulverization here can adopt conventional pulverization methods, such as mechanical pulverization (such as ball mill pulverization), jet pulverization, etc.; the drying here can also adopt conventional drying methods, such as oven drying, spray drying, freeze drying or boiling drying, etc.

[0029] B. Put the mixed powder of tungsten and cesium in a closed reaction kettle with stirring, and add triethylene glycol as a reaction solvent to it, and stir and react for 4.5 hours at 330°C. The quality of the reaction solvent is a mixture of tungsten and cesium. 1 times the mass o...

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Abstract

The invention discloses a preparation method of cesium tungstate nanopowder. The preparation method comprises the following steps of A, dissolving reacting doses of tungsten raw materials and cesium carbonate raw materials into a solvent, drying the solution to obtain particles, and further smashing the obtained particles to obtain tungsten and cesium mixed powder; B, placing the tungsten and cesium mixed powder into a sealed reaction kettle with a stirring function, adding a reaction solvent in the sealed reaction kettle, and reacting at the temperature of 180-350 DEG C for 2-8h while stirring, wherein the mass of the reaction solvent is 1-3 times as mush as that of the tungsten and cesium mixed powder; and C, separating the reaction product obtained in the step B, washing by using deionized water or ethanol, then, drying, and milling by using a jet mill to obtain a target product, namely the cesium tungstate nanopowder. The cesium tungstate nanopowder prepared by using the preparation method is low in agglomeration degree; and the preparation method is high in production efficiency and low in cost.

Description

technical field [0001] The invention relates to a preparation method of cesium tungstate nanopowder. Background technique [0002] Cesium tungstate (molecular formula is Cs 0.32 WO 3 , JCPDS No. 831334) Nanopowder has strong absorption characteristics in the near-infrared region (wavelength of 800-1100nm), and has strong transmission characteristics in the visible light region (wavelength of 380-780nm). The wavelength is 200-380nm) with strong shielding properties of nanoparticles, which have been widely used in the field of thin film transparent heat insulation, such as PVB laminated film, PET coating film, EVA film and optical filter (US patent US20100220388A1, US20110297899A1, US20070256782A1, US8399547B2), widely used in automotive film, architectural glass insulation, sunshade insulation, plastic greenhouses and other industries. It is also used to make infrared absorbing fibers for keeping warm in winter products (US patent US7687141B2, US20080308775A1). It may als...

Claims

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Application Information

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IPC IPC(8): C01G41/00B82Y30/00
Inventor 张建荣谭芳
Owner 宁波今心新材料科技有限公司
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