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Porous cubic phase scandium oxide powder and preparation method thereof

A scandium oxide, cubic phase technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of poor dispersion and uneven size distribution, and achieve the effect of good performance and narrow particle size distribution.

Active Publication Date: 2011-05-25
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The cubic scandium oxide powder prepared by the above five methods has a flake or granular shape, but has the disadvantages of uneven size distribution and poor dispersion.

Method used

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  • Porous cubic phase scandium oxide powder and preparation method thereof
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  • Porous cubic phase scandium oxide powder and preparation method thereof

Examples

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Effect test

example 1

[0021] Add 0.138g of scandium oxide and 1ml of concentrated nitric acid into 10ml of distilled water, heat and stir to dissolve. After the dissolution is complete, the solution is evaporated to dryness to remove excess concentrated nitric acid to obtain dry white scandium nitrate. Then add 20ml of distilled water therein, stir at room temperature to dissolve, then add 0.410g of sodium acetate trihydrate, 0.500g of polyethylene glycol 1000 and 1.000g of hexamethylenetetramine into the scandium nitrate aqueous solution while stirring. After the dissolution is complete, pour it into a 30ml reaction kettle and keep the temperature at 100°C for 24h. The obtained white precipitate was collected by filtration and dried at 65° C., and finally the obtained white precipitate was calcined at 800° C. for 4 hours to obtain a white powder. The obtained white powder is confirmed to be cubic phase scandium oxide through X-ray diffraction analysis, such as figure 1 ; Scandium oxide powder is...

example 2

[0023] Add 0.138g of scandium oxide and 1ml of concentrated nitric acid into 10ml of distilled water, heat and stir to dissolve. After the dissolution is complete, the solution is evaporated to dryness to remove excess concentrated nitric acid to obtain dry white scandium nitrate. Then add 20ml of distilled water therein, stir at room temperature to dissolve, then add 0.410g of sodium acetate trihydrate, 0.500g of polyethylene glycol 1000 and 1.000g of hexamethylenetetramine into the scandium nitrate aqueous solution while stirring. After the dissolution is complete, pour it into a 30ml reaction kettle and keep the temperature at 100°C for 4h. The obtained white precipitate was collected by filtration and dried at 65° C., and finally the obtained white precipitate was calcined at 800° C. for 4 hours to obtain a white powder. The obtained white powder was confirmed to be cubic scandium oxide by X-ray diffraction analysis.

example 3

[0025] Add 0.138g of scandium oxide and 1ml of concentrated nitric acid into 10ml of distilled water, heat and stir to dissolve. After the dissolution is complete, the solution is evaporated to dryness to remove excess concentrated nitric acid to obtain dry white scandium nitrate. Then add 20ml of distilled water therein, stir at room temperature to dissolve, then add 0.410g of sodium acetate trihydrate, 0.500g of polyethylene glycol 1000 and 1.000g of hexamethylenetetramine into the scandium nitrate aqueous solution while stirring. After the dissolution is complete, pour it into a 30ml reaction kettle and keep the temperature at 100°C for 48h. The obtained white precipitate was collected by filtration and dried at 65° C., and finally the obtained white precipitate was calcined at 800° C. for 4 hours to obtain a white powder. The obtained white powder was confirmed to be cubic scandium oxide by X-ray diffraction analysis.

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Abstract

The invention provides porous cubic phase scandium oxide powder and a preparation method thereof. In the invention, hexamine is used as a precipitator and added to a scandium nitrate solution to obtain hydroxyl scandium oxide precipitate by utilizing a uniform precipitating method in the presence of sodium acetate and polyethylene glycol 1000, and then the precipitate is collected and calcined at high temperature to prepare and obtain porous walnut-shaped cubic phase scandium oxide powder with uniform size and good dispersity. The multi-hole cubic phase scandium oxide powder has the characteristics of porosity and narrow particle size distribution and also has better property in the application of gas sensing and catalysis and important application prospect.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and relates to a porous walnut-shaped cubic-phase scandium oxide powder and a preparation method thereof. Background technique [0002] Scandium oxide has excellent physical and chemical properties such as high melting point, high refractive index and high thermal conductivity, and is widely used in ceramics, gas sensors, solid-state lasers and catalysis. The scandium sodium lamp made of scandium oxide is a new type of light source, which has the advantages of high luminosity, good light color, energy saving, long life and strong fog breaking power; scandium oxide can be used as a stabilizer and nitriding agent for zirconia ceramics Sintering aid for silicon ceramics; scandium oxide can be used to prepare excellent ceramic insulating materials for nuclear reactors; gadolinium gallium scandium garnet made of scandium oxide, its laser has higher laser output power than gadolinium gallium garne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
Inventor 杨明周有福陈白泉江飞龙洪茂椿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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