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Submicron yttrium oxide having high specific surface area and preparation method thereof

A high specific surface area, yttrium oxide technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of small particle size, difficulty, silicon ion increase, etc., to meet the requirements of product performance and large production batches , burning vector small effect

Active Publication Date: 2020-01-07
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comparison document uses alkali precipitation to produce nano-yttrium oxide with small particles and high BET, and sodium carbonate precipitation is used. The impurities in the obtained yttrium oxide are generally high, and sodium ions are particularly high. In addition, the dispersant uses poly Ether silane, the dispersant contains silicon, so it will lead to the increase of silicon ions
[0004] CN 108285166 A, adding anionic surfactant in oxalic acid aqueous solution, then thermally decomposing yttrium oxalate to prepare yttrium oxide with a central particle diameter of 1-1.5um, the particle size is small, but the specific surface area is not large enough, and needs to be further improved
[0005] It is generally believed that the smaller the particle size, the larger the specific surface area. The nanoscale yttrium oxide specific surface area produced by the prior art is higher, but the micron-scale yttrium oxide specific surface area is smaller. Yttrium oxide particles with high surface area present certain technical difficulties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1), diluting yttrium nitrate into a yttrium salt solution with a concentration of 0.2mol / l, adding mannitol in an amount of 3% of the total mass of yttrium oxide, after fully stirring, adjusting the pH value to 1 to obtain solution A;

[0024] (2), oxalic acid is made into the oxalic acid solution that concentration is 0.4mol / l, adds anionic surfactant, obtains solution B.

[0025] Wherein, the consumption of oxalic acid is 2 times of the total mass of the input yttrium oxide; the anionic surfactant is sodium dodecylbenzenesulfonate, and the addition is 3% of the total mass of the input yttrium oxide;

[0026] (3) Under the condition of constant stirring, drip solution A into solution B at a rate of 1-5L / min. After the addition, stir and age for 2 hours, then filter with suction, wash with water, drain and add organic Dispersant Tween 60, added in an amount of 3% of the total mass of rare earths, stirred evenly, then dried at 90°C for 10h, then burned (8h) at (850°C), ...

Embodiment 2

[0029] (1), diluting yttrium nitrate into a yttrium salt solution with a concentration of 0.2mol / l, adding mannitol in an amount of 3% of the total mass of the rare earth, after fully stirring, adjusting the pH value to 1 to obtain solution A;

[0030] (2), oxalic acid is made into the oxalic acid solution that concentration is 0.4mol / l, adds anionic surfactant, obtains solution B.

[0031] Wherein, the consumption of oxalic acid is 2 times of the total mass of the input yttrium oxide; the anionic surfactant is sodium dodecylbenzenesulfonate, and the addition is 3% of the total mass of the input yttrium oxide;

[0032] (3) Under the condition of constant stirring, drip solution A into solution B at a rate of 1-5L / min. After the addition, stir and age for 2 hours, then filter with suction, wash with water, drain and add organic Dispersant Tween 60, added in an amount of 5% of the total mass of the input rare earth, stirred evenly, then dried at 90°C for 10h, then burned (8h) at...

Embodiment 3

[0035] (1), yttrium chloride is diluted to concentration and is the yttrium salt solution of 1.0mol / l, adds mannitol dispersant, and its consumption is the gross mass 2.5% of the yttrium oxide that drops into, and after fully stirring, adjust pH value to be 2, Get solution A;

[0036] (2), oxalic acid is made into the oxalic acid solution that concentration is 0.4mol / l, adds anionic surfactant, obtains solution B.

[0037] Wherein, the consumption of oxalic acid is (2.3 times) of the total mass of the input yttrium oxide; the anionic surfactant is sodium dodecylbenzenesulfonate, and the addition is 3% of the total mass of the input yttrium oxide.

[0038] (3) Under the condition of constant stirring, drip solution A into solution B at a rate of 1-5L / min. After the addition, stir and age for 3 hours, then filter with suction, wash with water, drain and add organic The dispersant polyethylene glycol octyl phenyl ether is added in an amount of 3% of the total mass of the input r...

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Abstract

The invention belongs to the technical field of preparation of rare earth compounds, and in particular, relates to submicron yttrium oxide having high specific surface area and a preparation method thereof. Yttrium oxide with different specific surface areas and particle sizes can be prepared by changing the addition amounts of an organic dispersing agent and an anionic surfactant, oxalic acid isused as a precipitator, and the method has the advantages of large production batch, simple process and accordance with environmental protection requirements. The submicron yttrium oxide having high specific surface area and produced by the method avoids tedious post-treatment avoided, can be prepared by direct sieving, has the advantages of high purity, small ignition vector, low impurity contentand the like, and can meet the requirements of customers on product performance to a greater extent.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth compounds, and in particular relates to a preparation method of high specific surface area and submicron yttrium oxide. Background technique [0002] Yttrium oxide with large specific surface area and small particle size can be widely used in the production of laser materials, superconducting materials and other functional materials. In order to optimize the performance of the products made of it, the specific surface area and particle size of yttrium oxide must be strictly controlled. [0003] CN 110028810 A, adding dispersant solution to YCl 3 Fully stir in the solution, then add sodium carbonate solution, adjust the pH to 6-7; add polyether silane to the mixed solution for pH adjustment, stir and mix, then age, wash with water, and calcinate to obtain nanometer yttrium oxide powder; calcined The final nanometer yttrium oxide powder and deionized water are put into a sand mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01P2004/61C01P2006/12
Inventor 杨应亚
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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