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Method for preparing cesium tungstate of tungsten bronze structure

A technology of cesium tungstate and tungsten bronze, applied in chemical instruments and methods, tungsten compounds, inorganic chemistry, etc., can solve the problems of risk index and cost increase, and achieve the effect of environmental protection, simplified preparation process and low cost

Active Publication Date: 2019-02-22
ANHUI SHENGHONG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrothermal method requires the use of a pressure reactor, which increases the risk index and cost significantly in terms of industrial production

Method used

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  • Method for preparing cesium tungstate of tungsten bronze structure
  • Method for preparing cesium tungstate of tungsten bronze structure

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Experimental program
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Effect test

Embodiment 1

[0026] A preparation method of cesium tungstate of tungsten bronze structure, comprising the following steps;

[0027] (1) Mix cesium carbonate, tungsten oxide and deionized water to obtain mixture A, add a small amount of sintering aid, and perform wet ball milling at normal temperature to obtain a mixed slurry;

[0028] Wherein, the mol ratio of cesium carbonate and tungsten oxide is 1:1;

[0029] Burning aid is LiNbO 3 and boric acid, sintering aid weight accounted for 0.4% of mixture A, LiNbO 3 The mass ratio with boric acid is 1:1;

[0030] (2) Take out the mixed slurry, dry it, then dry the material in H 2 and N 2 Heat treatment at 450°C for 2 hours in a mixed atmosphere;

[0031] Among them, H 2 3%, N 2 97%.

[0032] (3) sintering the material obtained in (2) for the second time to obtain a blue material;

[0033] Among them, the sintering conditions are: the sintering temperature is 800°C, the holding time is 4 hours, and the air atmosphere;

[0034] (4) Ball...

Embodiment 2

[0036] A preparation method of cesium tungstate of tungsten bronze structure, comprising the following steps;

[0037] (1) Mix cesium carbonate, tungsten oxide and deionized water to obtain mixture A, add a small amount of sintering aid, and perform wet ball milling at normal temperature to obtain a mixed slurry;

[0038] Wherein, the mol ratio of cesium carbonate to tungsten oxide is 0.99:1;

[0039] The sintering aid is boric acid, and the weight of the sintering aid accounts for 0.2% of the mixture A;

[0040] (2) Take out the mixed slurry, dry it, then dry the material in H 2 and N 2 Heat treatment at 460°C for 3 hours in a mixed atmosphere;

[0041] Among them, H 2 3%, N 2 97%.

[0042] (3) sintering the material obtained in (2) for the second time to obtain a blue material;

[0043] Among them, the sintering conditions are: the sintering temperature is 850°C, the holding time is 1 hour, and the air atmosphere;

[0044] (4) Ball milling the blue material obtained ...

Embodiment 3

[0046] A preparation method of cesium tungstate of tungsten bronze structure, comprising the following steps;

[0047] (1) Mix cesium carbonate, tungsten oxide and deionized water to obtain mixture A, add a small amount of sintering aid, and perform wet ball milling at normal temperature to obtain a mixed slurry;

[0048] Wherein, the mol ratio of cesium carbonate to tungsten oxide is 1.03:1;

[0049] Burning aid is LiNbO 3 , the weight of the sintering aid accounts for 1% of the mixture A;

[0050] (2) Take out the mixed slurry, dry it, then dry the material in H 2 and N 2 Heat treatment at 470°C for 4 hours in a mixed atmosphere;

[0051] Among them, H 2 3%, N 2 97%.

[0052] (3) sintering the material obtained in (2) for the second time to obtain a blue material;

[0053]Among them, the sintering conditions are: the sintering temperature is 900°C, the holding time is 3 hours, and the air atmosphere;

[0054] (4) Ball milling the blue material obtained in (3) to obt...

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Abstract

The invention provides a method for preparing cesium tungstate of a tungsten bronze structure. The method comprises the following steps: (1) mixing cesium carbonate and tungsten oxide with deionized water so as to obtain a mixture A, adding a trace amount of sintering aids, and performing normal-temperature wet-method ball milling so as to obtain mixed slurry; (2) taking out the mixed slurry, drying, and carrying out thermal treatment on the dried material in a mixed atmosphere of H2 and N2 at 450-500 DEG C for 2-5 hours; (3) performing secondary sintering on the material obtained in step (2)so as to obtain a blue material, wherein the sintering conditions are that the sintering temperature is 800-1000 DEG C, the temperature keeping time is 1-4 hours, and an air atmosphere is provided; (4) carrying out ball milling and crushing on the blue material obtained in step (3), thereby obtaining blue cesium tungstate powder. By adopting the method, complex preparation processes in the prior art are simplified, the method is environmentally friendly, the cost is low, compared with a conventional solid-phase synthesis method, the method is simple to operate, and a process of one-time atmosphere protection sintering is avoided.

Description

technical field [0001] The invention relates to the technical field of material synthesis, in particular to a method for preparing cesium tungstate with a tungsten bronze structure. Background technique [0002] In recent years, cesium tungstate powder with tungsten bronze structure has attracted attention due to its excellent low resistance, low temperature superconductivity, photochromic and photoelectric properties. Cesium tungstate (Cs 0.32 WO 3 ) prepared glass surface transparent film has excellent visible light transmission and near-infrared light shielding characteristics, and has potential application prospects in electronic devices, glass heat insulation, near-infrared shielding, etc. Transparent heat-insulating coatings for glass are also used in infrared blocking fibers to keep warm in textiles, and as electronic components in electronic packaging materials, medical diagnosis and treatment, laser printing, laser welding and other fields. The market is broad. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
CPCC01G41/00
Inventor 罗秋玲刘国强
Owner ANHUI SHENGHONG ELECTRONICS
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