Tungsten-molybdenum-based superfine composite oxide solid solution and preparation method thereof

A composite oxide, solid solution technology, applied in the direction of tungsten oxide/tungsten hydroxide, molybdenum oxide/molybdenum hydroxide, etc., can solve the problem of no preparation report, avoid lattice distortion, low energy consumption, high oxidation resistance temperature Effect

Inactive Publication Date: 2010-10-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the present invention is the first synthesis of tungsten-molybdenum-base

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The weight ratio of each component in the target product tungsten-molybdenum-based ultrafine composite oxide solid solution is: MoO 3-x 80%, WO 3-x 20%. According to MoO 3-x 、WO 3-x Take by weighing 20 g of ammonium molybdate and 4.2 g of tungstic acid required for the reaction. First add ammonium molybdate to the reactor, add 60g of ionized water, heat and stir continuously, stop heating until the white crystals are completely dissolved; add tungstic acid while stirring, and stir until the system is uniform; add 30g of oxalic acid, and add 0.5 g surfactant Triton x-100, stir evenly; the density of hydrazine hydrate is 1.03g / mL, weigh 29mL of hydrazine hydrate according to the mass of hydrazine hydrate added as 30g, and stir well. After drying at 90°C for 6 hours, the precursor of the target product was obtained. After the precursor is ground, it is transferred into a crucible and placed in a muffle furnace. Calcined at 650°C for 2 hours, took out the crucible, co...

Embodiment 2

[0024] The weight ratio of each component in the target product tungsten-molybdenum-based ultrafine composite oxide solid solution is: MoO 3-x 80%, WO 3-x 20% according to MoO 3-x 、WO 3-x Take by weighing 20 g of ammonium molybdate and 4.2 g of tungstic acid required for the reaction. First add ammonium molybdate to the reactor, add 100g of ionized water, heat and stir continuously, stop heating until the white crystals are completely dissolved; add tungstic acid while stirring, and stir until the system is uniform; add 30g of oxalic acid, and add 20g Polyethylene glycol, stir evenly; the density of hydrazine hydrate is 1.03g / mL, weigh 58mL of hydrazine hydrate according to the mass of hydrazine hydrate added as 60g, and stir thoroughly. After drying at 90°C for 2 hours, the precursor of the target product was obtained. After the precursor is ground, it is transferred into a crucible and placed in a muffle furnace. Calcined at 650°C for 2 hours, took out the crucible, coo...

Embodiment 3

[0026] The weight ratio of each component in the target product tungsten-molybdenum-based ultrafine composite oxide solid solution is: MoO 3-x 50%, WO 3-x 50% according to MoO 3-x 、WO 3-xTake by weighing 12.5 g of ammonium molybdate and 10.5 g of tungstic acid required for the reaction. First add ammonium molybdate to the reactor, add 100g of ionized water, heat and stir continuously, stop heating until the white crystals are completely dissolved; add tungstic acid while stirring, and stir until the system is uniform; add 35g of oxalic acid, and add 20g Triton x-100, stir evenly; the density of hydrazine hydrate is 1.03g / mL, weigh 97mL of hydrazine hydrate according to the mass of hydrazine hydrate added as 100g, and stir well. After drying at 90°C for 6 hours, the precursor of the target product was obtained. After the precursor is ground, it is transferred into a crucible and placed in a muffle furnace. Calcined at 850°C for 2 hours, took out the crucible, cooled natura...

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Abstract

The invention relates to tungsten-molybdenum-based superfine composite oxide solid solution and a preparation method thereof. The preparation method is characterized in that: ammonium molybdate and tungstic acid are used as main raw materials, and meanwhile a surfactant is added into the raw materials so as to disperse the system more uniformly and facilitate the formation of more stable solid solution; and deionized water is used as a medium, oxalic acid and hydrazine hydrate are used as reducing agents, and the solid solution with good conductive performance and thermal stability is obtained through reduction reaction. The volume resistance of the tungsten-molybdenum-based superfine composite oxide solid solution is 0.01 to 0.001 ohm per centimeter, and the anti-oxidation temperature is310 DEG C, so the thermal stability and the application range of the mixed-valent conductive material are greatly improved. The method has the advantages of quick reaction, no any waste discharge, simple process, high product purity, low energy consumption and the like, and meets the requirements of low-carbon economy and sustainable development economy strategies.

Description

Technical field: [0001] The invention belongs to the field of inorganic chemistry, and specifically relates to a tungsten-molybdenum-based ultrafine composite oxide solid solution and a preparation method thereof. The ultrafine composite oxide solid solution has good conductivity and oxidation resistance, and can be widely used in antistatic coatings, conductive rubber, electromagnetic shielding glass and many other fields. Background technique: [0002] Conductive powder is an important member of conductive functional materials. The resistance of the powder itself and the level of anti-oxidation temperature are directly related to the quality and application range of the powder. As a new type of conductive powder, mixed valence tungsten oxide and mixed valence molybdenum oxide have the advantages of low resistance and lower cost than metal powder (Chinese patent CN1376637A, Chinese patent CN1925737A), and have attracted the attention of enterprises and scientific researcher...

Claims

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Application Information

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IPC IPC(8): C01G41/02C01G39/02
Inventor 刘金库罗重霄
Owner EAST CHINA UNIV OF SCI & TECH
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