Method for preparing rutile phase hypovanadic oxide powder

A technology of vanadium dioxide and rutile phase, which is applied in the direction of vanadium oxide, etc., can solve the problems that the rutile phase vanadium dioxide powder has not been seen yet, and achieve the effects of good product crystallinity, simple preparation process and low production cost

Active Publication Date: 2009-03-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Method for preparing rutile phase hypovanadic oxide powder
  • Method for preparing rutile phase hypovanadic oxide powder
  • Method for preparing rutile phase hypovanadic oxide powder

Examples

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Embodiment 1

[0029] Disperse the vanadium pentoxide powder in the oxalic acid solution, weigh white tungstic acid with a molar percentage of 1% vanadium ions, add the above solution to a 100ml polytetrafluoroethylene-lined hydrothermal kettle, and the filling amount is volume Percentage 50%, hydrothermal reaction at 240 degrees Celsius for 7 days, cooling, centrifugation, and drying in an oven at 70 degrees Celsius for 24 hours.

Embodiment 2

[0031] Disperse the vanadium pentoxide powder in the oxalic acid solution, weigh the sodium tungstate with a molar percentage of 8% vanadium ions, add the above solution into a 100ml polytetrafluoroethylene-lined hydrothermal kettle, and the filling volume is 85% , 240 degrees centigrade hydrothermal reaction for 7 days, then centrifuged after cooling, and dried in an oven at 70 degrees centigrade for 24 hours.

Embodiment 3

[0033] Configure the mixed solution of vanadyl sulfate and oxalic acid, take by weighing molybdic acid with a molar percentage of 4% of vanadium ions, the filling amount is 50% by volume, add the above solution to a 100ml polytetrafluoroethylene lined hydrothermal kettle, and the filling amount is volume Percentage 75%, hydrothermal reaction at 240°C for 3 days, cooling, centrifugation, and drying in an oven at 70°C for 24h.

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Abstract

The invention relates to a method for preparing rutile-phase vanadium dioxide powder, in particular to a method for preparing rutile-phase vanadium dioxide powder through a hydrothermal method. The method for preparing rutile-phase vanadium dioxide powder adopts the conditions of different vanadium materials, dopants and doping ratios, and the like, to obtain rutile-phase vanadium dioxide powders with good crystallization performance and in shapes of grains, nanometer rods and snowflake-shaped grains. The temperature for transforming the powder from semiconductor phase to conductor phase can be reduced approximately to the room temperature.

Description

technical field [0001] The invention relates to a method for preparing a powder of rutile phase vanadium dioxide, in particular to a method for preparing a powder of rutile phase vanadium dioxide by a hydrothermal method. Background technique [0002] Under the situation of tightening global energy supply, energy saving has become an important issue that the construction industry must face. The total energy consumption of buildings in my country has been increasing year by year, and its proportion in the total energy consumption has risen from 10% in the late 1970s to 27.45% in recent years. At present, energy saving in the construction industry is mainly reflected in window design and lighting energy saving. In the design of glass windows, smart windows that can automatically adjust the transmission of infrared light according to the indoor temperature have good application prospects [0003] Rutile phase (R phase) vanadium dioxide has become the most promising smart wind...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 高彦峰曹传祥罗宏杰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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