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Nanometer dysprosium oxide preparation method

A technology of nano-dysprosium oxide and dysprosium nitrate, which is applied in the direction of chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of insufficient uniformity of nano-dysprosium oxide particles, insufficient dispersion, and inability to prepare, so as to achieve large specific surface area and process technology Simple, uniform particle size effect

Inactive Publication Date: 2016-04-20
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The particle size of dysprosium oxide precipitated by oxalic acid using the traditional method of rare earth industry is generally in the range of 1-15 μm, while the precipitation of ammonia water and ammonium bicarbonate cannot be prepared due to unfavorable environmental protection, and other nano-dysprosium oxide particles are not uniform enough, and the dispersion is not enough.

Method used

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  • Nanometer dysprosium oxide preparation method

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Embodiment 1

[0013] Embodiment 1: add in reaction kettle and be mixed with pure water and be mixed with dysprosium nitrate that concentration is 0.4mol / L, volume is 13.4L, after measuring temperature is 15 degree, then take by weighing analytical pure sodium carbonate 1KG, be mixed with pure water The concentration is 0.4mol / L, the volume is 23.58L, and the temperature is 15 degrees. Weigh 100 grams of PEG-20000 surfactant with an oxide mass ratio of 10%, add 1L of pure water, heat to dissolve it into a liquid, and dissolve the PEG -20000 was put into dysprosium nitrate and mixed and stirred for 15 minutes, and finally sodium carbonate was added dropwise evenly. After finishing, continue to stir for 0.5 hours, age for 2 hours, soak and wash with hot pure water above 95 degrees in the suction filter barrel, wash about 500L with water, and finally filter dry, add 200ml of n-butanol to the filter cake, stir evenly and thoroughly , put it in a bowl, and heat it at 800 degrees for a total of 4 ...

Embodiment 2

[0014] Embodiment 2: add in reaction kettle and be mixed with pure water and be mixed with the dysprosium nitrate that concentration is 0.4mol / L, volume is 47.66L, after measuring temperature is 17 degree, then take by weighing analytical pure sodium carbonate 4KG, be mixed with pure water The concentration is 0.4mol / L, the volume is 94.34L, and the temperature is 18 degrees. Weigh 320 grams of PEG-20000 surfactant with an oxide mass ratio of 8%, add 3.2L of pure water, and heat to dissolve it into a liquid. Put PEG-20000 into dysprosium nitrate and mix and stir for 15 minutes, and finally add sodium carbonate dropwise evenly. The dropping time is 141 minutes. From this, it can be calculated that the adding rate is 0.67 L / min. The flow and adding speed are controlled by the governor. After the addition, continue to stir for 0.5 hours, age for 2 hours, soak and wash with hot pure water above 95 degrees in the suction filter barrel, wash about 2000L with water, and finally filter...

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Abstract

The present invention relates to a nanometer dysprosium oxide preparation method, which comprises: adding dysprosium nitrate with a concentration of 0.1-0.6 mol / L and prepared by using pure water to a reaction kettle, and weighing analytical pure sodium carbonate with a concentration of 0.1-0.6 mol / L and prepared by using pure water, wherein a mass ratio of the dysprosium nitrate to the analytical pure sodium carbonate is 1:1-1:1.2; weighing a polyethylene glycol 20000 surfactant with a mass ratio of 5-15% to the dysprosium nitrate, stirring for 15-30 min, uniformly adding a precipitating agent in a dropwise manner, carrying out stirring aging, carrying out suction filtration water washing, draining, adding a surfactant n-butanol, and uniformly stirring, wherein a molar ratio of the obtained substance to the n-butanol is 1:200-1:400; and calcining for 3-5 h at a temperature of 800 DEG C, and carrying out thermal insulation for 1 h so as to obtain the nanometer dysprosium oxide with a particle size of 40-60 nm and a specific surface area of greater than 25. With the preparation method of the present invention, the problems of non-uniform particles and insufficient dispersity are solved, and the characteristics of uniform particle and good dispersity are provided.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method of nanometer dysprosium oxide. Background technique [0002] Dysprosium oxide is the raw material for producing dysprosium, glass, and additive for NdFeB permanent magnets. It is also used in metal halide lamps, magneto-optical memory materials, yttrium-iron or yttrium-aluminum garnet, and in the atomic energy industry. control stick. With the development of science and technology, there is more and more demand for nano-dysprosium oxide with large specific surface area. In ceramic electric fuses, nano-dysprosium oxide particles can significantly improve the performance of products. However, the particle size of dysprosium oxide precipitated by oxalic acid using the traditional method of rare earth industry is generally in the range of 1-15 μm, while the precipitation of ammonia water and ammonium bicarbonate cannot be prepared due to unfavorab...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y30/00
Inventor 王鹭
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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