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A kind of production method of nano cesium tungstate powder

A production method, nano-tungsten technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high cost, complicated washing process, and long time, and achieve low cost, convenient industrial production, and safe process Effect

Active Publication Date: 2018-04-24
GANZHOU RUIDE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to overcome the shortcomings of complex washing process, long time and high cost, the technical problem to be solved by the present invention is to provide a nano cesium tungstate powder that does not need washing, has high production efficiency, low cost, safety and environmental protection, and basically no agglomeration production method

Method used

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  • A kind of production method of nano cesium tungstate powder
  • A kind of production method of nano cesium tungstate powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 100g of ammonium paratungstate is dissolved in 200g of water, 15g of cesium carbonate is dissolved in 10g of water, 100g of urea is dissolved in 200g of water, and the above solution is sequentially added to 2000ml of mixed solvent of ethanol and ethyl alcohol (ethanol: ethyl acetate volume ratio is 1:1), stir well, heat at 110°C, concentrate and dry (distillate is condensed and recovered), cool and grind, dry product is ground and roasted at 400°C for 6 hours, cool and grind, add to a 500ml autoclave, add 300ml of water, seal and heat and stir React (160° C.) for 4 hours, cool and discharge, filter, and dry the filter mud at 100° C. (10 hours) and pulverize to obtain 96 grams of blue nano cesium tungstate powder.

Embodiment 2

[0032] Dissolve 100g of ammonium metatungstate in 60ml of water, dissolve 13g of cesium carbonate in 10g of water, dissolve 5g of PVP in 20g of water, and add the above solutions in turn to a mixed solvent (600ml) of methanol and butyl acetate, (ethanol: butyl acetate Ester volume ratio = 1:3), stir evenly, heat at 80°C to concentrate and dry (distillate is condensed and recovered) to obtain a dry product, roast at 500°C for 2 hours, cool and pulverize the roasted product, add to a 500ml autoclave, add 400ml of water, seal , heated and stirred for reaction (250° C., 3 hours), cooled and discharged, filtered, dried at 80° C. (12 hours) and pulverized to obtain 101 grams of blue nano cesium tungstate powder product.

Embodiment 3

[0034] Dissolve 200g of ammonium metatungstate in 120g of water, dissolve 22g of cesium hydroxide in 20g of water, and dissolve 100g of ammonium oxalate in 200g of water.

[0035] Add the above three aqueous solutions in sequence to the mixed solution (800ml) composed of ethanol and ethylene glycol monopropyl ether (volume ratio = 1:1), stir well, heat to less than 120°C, concentrate and dry (distillate is condensed and recovered) to obtain Dry product, crushed, roasted at 600°C for 2 hours, cooled and crushed the roasted product, put it into a 500ml autoclave, added 300ml of water, sealed, heated and stirred for reaction (200°C, 8 hours), cooled and discharged, filtered, and dried at 120°C for 8 hours, Pulverize to obtain 203 grams of blue nano cesium tungstate powder.

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Abstract

The invention relates to a method for producing nano cesium tungstate powder and provides a preparation method of nano cesium tungstate powder which is free of washing, high in production efficiency and low in cost. According to the method, ammonium tungstate, ammonium paratungstate and ammonium metatungstate serve as tungsten sources, cesium hydroxide, cesium carbonate, cesium oxalate and cesium citrate serve as cesium sources, urea, PVP, PVA, oxalic acid and ammonium oxalate serve as dispersing agents, the materials are dissolved in water respectively and sequentially and evenly mixed with at least two of organic solvents containing alcohol, ether and ester functional groups, concentration and drying are conducted to obtain a powder substance, the powder substance is calcined to obtain blue powder, the blue powder is stirred in a high-pressure kettle under the hydrothermal condition at 120-250 DEG C, and then the blue powder is filtered, dried and smashed to obtain the blue nano cesium tungstate powder. The nano cesium tungstate powder produced through the method does not need to be washed, is hardly agglomerated and is easily dispersed into nano particles, production efficiency is high, the process is relatively safe and environmentally friendly, cost is low, and industrial production is convenient.

Description

technical field [0001] The invention relates to a production method of nanometer cesium tungstate powder. Background technique [0002] Nano cesium tungstate powder has strong absorption and absorption ability for near-infrared light (wavelength 800-1200nm), strong transmittance for visible light (wavelength 380-800nm), and ultraviolet light (wavelength 180-380nm). Strong shielding effect, due to its above-mentioned excellent characteristics, has been widely used in the field of transparent heat insulation film, and has been widely used in various industries such as automotive heat insulation film, architectural glass film, and sunshade heat insulation. It is also used as the thermal insulation of infrared blocking fiber applied textiles (US patent US7687141B2.US20080308775A1), and has also been used in electronic packaging materials, laser printing, laser welding, medical diagnosis and treatment, or has a potential application market. [0003] The preparation and productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00B82Y30/00
Inventor 易绍文邝毅斌易鹤翔
Owner GANZHOU RUIDE CHEM
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