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Preparation method of ultra-fine yttrium oxide

A technology of yttrium oxide and anion, applied in the field of yttrium oxide, can solve the problems of strong corrosion of formic acid, harmful to human body and high cost, achieve the effects of uniform particle distribution, simple preparation process and avoid particle breakage

Inactive Publication Date: 2018-07-17
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent No. is CN1195647A, which provides a method of dissolving yttrium nitrate in formic acid, then adding hydrazine, and the particle size of yttrium oxide after burning the mixture is less than 1um, but the cost of this method is high, and both formic acid and hydrazine are environmentally friendly. Formic acid is highly corrosive, and it is harmful to the human body if inhaled too much
Hydrazine contains ammonia nitrogen, which is not conducive to production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The yttrium chloride solution is obtained after the rare earth ore is separated by the extraction tank, and the concentration is adjusted to 0.4mol / l, and the pH is 1. Take 1107ml of this solution, take 115g of oxalic acid, and dilute to obtain 2.28L of solution. Add 2g of sodium dodecylbenzene sulfonate to dissolve in water, add yttrium chloride solution while stirring the oxalic acid solution continuously, feeding speed: 1L / min, stir and age for 8 hours, then suction filter and wash to pH: 7. Dry the precipitate at 120°C and burn it at 800°C to obtain ultrafine yttrium oxide. The D50 detected by Malvern 2000 is 1.443um.

Embodiment 2

[0014] Dissolve yttrium oxide in nitric acid to obtain yttrium nitrate solution, adjust to a concentration of 0.3mol / l, pH:1. Take 2362ml of this solution, take 184g of oxalic acid, and dilute to obtain 4.87L of solution, add 4g of sodium dodecylbenzenesulfonate, stir, add yttrium nitrate solution under the condition of constant stirring of the oxalic acid solution, stir, and age for 6 hours. Suction filtration and washing to PH: 7, dry the precipitate at 100°C, and burn at 850°C to obtain ultrafine yttrium oxide. The D50 detected by Malvern 2000 is 1.38um.

Embodiment 3

[0016] Dissolve yttrium oxide in nitric acid to obtain yttrium nitrate solution, adjust to 0.2mol / l, pH:1. Take 4430ml of this solution, take 250g of oxalic acid, and dilute to obtain a solution of 9.92L. Add 6g of sodium lauryl sulfate and stir, add yttrium nitrate solution while stirring the oxalic acid solution, stir and age for 10 hours, filter and wash to pH: 7, dry the precipitate at 100°C, After firing at 850°C, ultrafine yttrium oxide was obtained. D50 detected by Malvern 2000: 1.31um.

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Abstract

The invention relates to a preparation method of ultra-fine yttrium oxide and belongs to the technical field of preparation of rare earth compounds. The preparation method is characterized in that themedium particle size of the yttrium oxide is 1.0-1.5 mum, and the particle sizes are uniformly distributed. The preparation method provided by the invention has the benefits that process conditions are relatively simple, the industrialized production is easily realized, and the whole preparation process meets the environmental requirements.

Description

technical field [0001] The invention adopts a precipitation method, uses oxalic acid as a precipitating agent, and anionic surfactants as additives to precipitate rare earth ions to prepare superfine yttrium oxide with uniform particle size distribution, which belongs to a material preparation process. Background technique [0002] Rare earth oxides are widely used, especially in glass, ceramics, electronics and other fields. With the continuous development of science and technology, the rare earth oxides produced are required to have specific physical and chemical forms. At present, the market demand for products with controllable particle size has increased significantly. [0003] In many applications, there are strict requirements on the particle size and particle size distribution of rare earth oxide powder. For example, when yttrium oxide is used in LED powder, in order to improve the brightness of the product, reduce dispersion, and prolong its life, the purity of yt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/206C01P2004/61
Inventor 杨应亚
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS