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Preparation method of nanometer tungsten trioxide crystallite

A nano-tungsten trioxide, microcrystalline technology, applied in chemical instruments and methods, tungsten oxide/tungsten hydroxide, crystal growth and other directions, can solve the problems of complex process, achieve short process flow, easy mass production, surface effect significant effect

Inactive Publication Date: 2006-09-13
TAIYUAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The preparation method of nano tungsten trioxide crystallites of the present invention aims at overcoming the defects of complicated technological process in the above-mentioned prior art, and discloses a method for preparing nano-tungsten trioxide crystallites with high purity and uniform particle size distribution by plasma chemical vapor deposition Materials Technology Solutions

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  • Preparation method of nanometer tungsten trioxide crystallite
  • Preparation method of nanometer tungsten trioxide crystallite
  • Preparation method of nanometer tungsten trioxide crystallite

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Embodiment approach 1

[0028]Use tungsten chloride as the basic raw material. The power of the high-frequency plasma generator 1 is 2.5KW; the inner diameter of the high-frequency plasma reactor 2 is 20mm, and the ratio of the length to the inner diameter is 4:1; the inner diameter of the cooler 3 is 75mm, and the ratio of the length to the inner diameter is 4: 1; The stainless steel wire mesh in the product collector 4 is 200 meshes, and the power of the induced draft fan 5 is 250W. The cooling water flow rates of the upper and lower sections of the high-frequency plasma reactor 2 and the cooler 3 are respectively 20l / h, 50l / h and 100l / h; with argon as the plasma working gas, the volumetric flow rates of fuel gas and cooling gas are 4l / h, respectively. min and 12l / min; the flow rate of oxygen at inlet a and inlet c are 1.5l / min and 8l / min respectively; the operating pressure of the regulating system is: negative pressure, 8mm water column; setting of the tungsten halide raw material vaporizer The tempe...

Embodiment approach 2

[0030] Use tungsten chloride as the basic raw material. The power of the high-frequency plasma generator 1 is 3KW; the inner diameter of the high-frequency plasma reactor 2 is 25mm, and the ratio of length to inner diameter is 3:1; the inner diameter of cooler 3 is 75mm, and the ratio of length to inner diameter is 4:1 ; The stainless steel wire mesh in the product collector 4 is 160 mesh, and the power of the induced draft fan 5 is 300W. The cooling water flow rates of the upper and lower sections of the high-frequency plasma reactor 2 and the cooler 3 are 25l / h, 75l / h and 200l / h respectively; with argon as the plasma working gas, the volumetric flow rates of fuel gas and cooling gas are 5l / h, respectively. min and 15l / min; the flow of oxygen at inlet a and inlet c are 2l / min and 12l / min respectively; the operating pressure of the regulating system is: negative pressure, 15mm water column; the set temperature of the tungsten halide raw material vaporizer At 360°C, the raw materia...

Embodiment approach 3

[0032] Use tungsten bromide as the basic raw material. The power of the high-frequency plasma generator 1 is 10KW; the inner diameter of the high-frequency plasma reactor 2 is 40mm, and the ratio of length to inner diameter is 4:1; the inner diameter of cooler 3 is 150mm, and the ratio of length to inner diameter is 6:1 ; The stainless steel wire mesh in the product collector 4 is 120 mesh, and the power of the induced draft fan 5 is 1200W. The cooling water flow rates of the upper and lower sections of the high-frequency plasma reactor 2 and the cooler 3 are respectively 100l / h, 250l / h and 500l / h; using argon as the plasma working gas, the volumetric flow rates of fuel gas and cooling gas are respectively 20l / h min and 100l / min; the oxygen flow rate at inlet a and inlet c are 5l / min and 25l / min respectively; the operating pressure of the regulating system is: negative pressure, 30mm water column; the set temperature of the tungsten halide raw material vaporizer At 560°C, the raw ...

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Abstract

A process for preparing WO3 nanocrystals from tungsten halide by HF plasma CVD method includes the oxidizing reaction in HF plasma jet, and sudden cooling.

Description

1. Technical Field [0001] The method for preparing nano tungsten trioxide microcrystals of the present invention belongs to the category of chemical processes and new material synthesis technologies. Specifically, gaseous tungsten halide is injected into an oxygen-rich high-frequency plasma jet atmosphere to prepare nano tungsten trioxide microcrystals. A method of crystal material. 2. Background technology [0002] The stable oxides of tungsten mainly include: yellow tungsten (WO 3 ), blue tungsten (WO 2.90 ), purple tungsten (WO 2.72 ) And brown oxide (WO 2 ). Tungsten trioxide is yellow tungsten, which is a complete oxide of tungsten, and is the main raw material for the production of tungsten powder and tungsten carbide in the cemented carbide field. Nano WO 3 It has a strong ability to absorb electromagnetic waves, and can be used as an excellent absorption material in the use of solar energy, and can be used as an important invisible material in the military; nano WO 3 It h...

Claims

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Application Information

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IPC IPC(8): C01G41/02C30B25/00
Inventor 孙彦平王俊文庄壮陈新谋
Owner TAIYUAN UNIV OF TECH
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