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Submicron doped tungsten oxide-based powder as well as preparation method and application thereof

A sub-micron, tungsten oxide technology, applied in the direction of tungsten oxide/tungsten hydroxide, etc., can solve the problems of low density of tungsten oxide-based semiconductor ceramics, low density of green bodies, and easy bridging of particle size accumulation.

Active Publication Date: 2021-02-19
北京航大微纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The existing tungsten trioxide powder has two main particle sizes, one is high-purity nano-powder with an average particle The bulk particle size distribution is narrow, and the particle size accumulation is prone to bridging, etc., resulting in low density of the green body, and the prepared tungsten oxide-based semiconductor ceramics are also low in density.
The second is to prepare micron / millimeter low-purity WO3 powder for W metal. The purity of this powder is low, and the conductivity of the prepared tungsten oxide-based semiconducting ceramics is poor.

Method used

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  • Submicron doped tungsten oxide-based powder as well as preparation method and application thereof
  • Submicron doped tungsten oxide-based powder as well as preparation method and application thereof
  • Submicron doped tungsten oxide-based powder as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] 1. Preparation of doped submicron tungsten oxide-based powder:

[0080] 1) Prepare raw materials: prepare ammonium metatungstate with a purity ≥ 99.99%, and the doping source element components in this embodiment are calculated as Mo:Li:Zr=5:10:1 according to the molar ratio; prepare MoO with the corresponding element ratio 2 , Li 2 O, ZrO 2 Doping source powder, purity ≥ 99.99%; the mass ratio of ammonium metatungstate added to doping source powder is 87:13.

[0081] It is also feasible to purchase other elemental metals, alloy inorganic salts, and organic salts of corresponding elements for the doping source powder, and the effect is similar.

[0082] 2) preparing a premix solution, fully dissolving pure water, organic monomer acrylamide, and crosslinking agent N'N'-methylenebisacrylamide in a weight ratio of 100:10:1 to form a premix solution;

[0083] 3) Preparation of slurry: Add the pure ammonium metatungstate and doping source powder prepared in step 1) to the...

Embodiment 2

[0100] 1. Preparation of doped submicron tungsten oxide-based powder:

[0101] 1) Prepare raw materials: prepare ammonium metatungstate with a purity ≥99.99%, and the doping source element components of this embodiment are calculated as Ti:Mo:Zr=10:5:1 according to the molar ratio; prepare the oxidation of the corresponding element ratio Titanium, molybdenum oxide, zirconia doping source powder, purity ≥ 99.995%; the mass ratio of ammonium metatungstate added to doping source powder is 87:13.

[0102] It is also feasible to purchase other elemental metals, alloy inorganic salts, and organic salts of corresponding elements for the doping source powder, and the effect is similar.

[0103] 2) preparing a premix solution, fully dissolving pure water, organic monomer acrylamide, and crosslinking agent N-N' methylenebisacrylamide in a weight ratio of 100:10:1 to form a premix solution;

[0104] 3) Preparation of slurry: add the ammonium metatungstate prepared in step 1) and the dop...

Embodiment 3

[0113] 1. Preparation of doped submicron tungsten oxide-based powder:

[0114] 1) Prepare raw materials: prepare ammonium metatungstate with a purity ≥99.99%, and the doping source element components of this embodiment are calculated as Ti:Mo:Zr=10:1:1 according to the molar ratio; prepare the oxidation of the corresponding element ratio Titanium, molybdenum oxide, zirconia doping source powder, purity ≥ 99.999%; the mass ratio of added ammonium metatungstate to doping source powder is 92.2:7.8.

[0115] It is also feasible to purchase other elemental metals, alloy inorganic salts, and organic salts of corresponding elements for the doping source powder, and the effect is similar.

[0116] 2) To prepare a premix solution, the pure water and the organic monomer are a combination of polyvinyl alcohol and polyacrylic acid, wherein the ratio of polyvinyl alcohol to polyacrylic acid is 1:1, and the crosslinking agent is polyethylene glycol, polyethylene glycol A combination of alc...

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Abstract

The invention relates to submicron tungsten oxide-based powder and a preparation method and an application thereof. The total mass fraction of doped source elements in mixed powder is 5-50%, the dopedsource elements are selected from at least three of Ti, Mo, V, Al, Li and Zr, the purity of the mixed powder is larger than 99.95%, the average particle size is 500 nm-1800 nm, and the D50 particle size is 200-750 nm; wherein M1 is defined as the mass fraction of powder particles with the particle size of 50-100 nm, M2 is defined as the mass fraction of powder particles with the particle size of100-400 nm, M3 is defined as the mass fraction of powder particles with the particle size of 400-700 nm, M4 is defined as the mass fraction of powder particles with the particle size of 700 nm and 1 micron, M5 is defined as the mass fraction of powder particles with the particle size of more than 1 micron; then the quantitative relationship of M1, M2, M3, M4, and M5 conforms to the formula in thespecification:.

Description

technical field [0001] The invention relates to ceramic powder materials, in particular to a high-purity submicron doped tungsten oxide powder used for preparing high-performance tungsten oxide-based semiconductor ceramics. Background technique [0002] Tungsten trioxide is an important n-type oxide semiconductor, which has important applications in the fields of gas-sensing materials, photocatalysis, and new energy. Tungsten trioxide is an anode electrochromic material with excellent performance, and has broad application prospects in the fields of large-screen display and high-density information storage. Compared with organic photochromic materials, WO 3 Good stability and low cost. Combining photoresponsive materials with WO 3 Recombination can effectively inhibit the recombination process of electrons after photoexcitation, thereby increasing the number of photogenerated carriers participating in the discoloration process and improving WO 3 photochromic properties. ...

Claims

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Application Information

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IPC IPC(8): C01G41/02C04B35/495C04B35/624
CPCC01G41/02C04B35/495C04B35/624C01P2002/72C01P2004/01C01P2004/62C04B2235/6581C04B2235/6562C04B2235/6567C04B2235/77C04B2235/6023C04B2235/786
Inventor 高明张虎张花蕊杨本润
Owner 北京航大微纳科技有限公司
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