Preparation method for nanometer yttrium oxide powder

A nanometer yttrium oxide and powder technology is applied in the field of preparation of rare earth ultrafine powder, which can solve the problems such as difficulty in controlling the growth rate of yttrium ions, and achieve the effects of being beneficial to precipitation and crystallization, improving purity and simple process

Active Publication Date: 2014-01-29
北京雷生强式科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that it is difficult to control the growth rate of yttrium ions in the prior art, the embodiment of the present invention provides a method for preparing nano-yttrium oxide powder

Method used

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  • Preparation method for nanometer yttrium oxide powder
  • Preparation method for nanometer yttrium oxide powder
  • Preparation method for nanometer yttrium oxide powder

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Embodiment 1

[0041] like figure 1 As shown, the embodiment of the present invention provides a kind of preparation method of nanometer yttrium oxide powder, and described method comprises:

[0042] Step 1: preparing an inorganic salt solution containing yttrium and an alcohol-water mixed solution containing a precipitating agent and an electrostatic stabilizer;

[0043] Step 2: Add the yttrium-containing inorganic acid salt solution dropwise to the alcohol-water mixed solution containing the precipitating agent and the electrostatic stabilizer, and adjust the pH value of the reaction system to not be lower than 7.5;

[0044] Step 3: After the titration reaction is completed, a surface modifier is added to the reaction system, and the reaction system is stirred, aged and separated, and the precipitate is taken;

[0045] Step 4: Purifying and washing the precipitate, vacuum drying and calcining to obtain nanometer yttrium oxide powder.

[0046] The preparation method of the nanometer yttri...

Embodiment 2

[0057] Dissolve high-purity yttrium oxide (purity greater than 99.999%) in concentrated nitric acid and transfer it to a 1L volumetric flask to make up a 0.4mol / L yttrium-containing nitrate solution; After ammonium and static stabilizer ammonium sulfate are dissolved in deionized water, the volume is adjusted to 1.5L with deionized water, and then 1L of absolute ethanol is added to the solution to prepare a precipitant and a static stabilizer with a concentration of 0.2mol / L. Alcohol-water mixed solution.

[0058] Add the above-prepared yttrium-containing nitrate solution dropwise to the above-prepared alcoholic aqueous solution containing a precipitating agent and an electrostatic stabilizer. During this process, control the dropping speed to 4ml / min, and use ammonia water to control the reaction system The pH value is not lower than 7.5; after the titration reaction is completed, add a surface modifier with a mass ratio of 0.3% to the yttrium-containing nitrate solution to t...

Embodiment 3

[0061] Dissolve high-purity yttrium oxide (purity greater than 99.999%) with concentrated sulfuric acid and transfer it to a 1L volumetric flask to make up a 0.1mol / L yttrium-containing nitrate solution; After the static stabilizer ammonium sulfate is dissolved in deionized water, the volume is adjusted to 1.0L with deionized water, and then 1L of absolute ethanol is added to the solution to prepare an alcohol with a concentration of 0.1mol / L for both the precipitant and the static stabilizer. water mixed solution.

[0062] Add the above-prepared yttrium-containing nitrate solution dropwise to the above-prepared alcoholic aqueous solution containing a precipitating agent and an electrostatic stabilizer. During this process, control the rate of dropping to 5ml / min, and use ammonia water to control the reaction system The pH value is not lower than 7.5; after the titration reaction is completed, add a surface modifier with a mass ratio of 0.4% to the yttrium-containing nitrate s...

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Abstract

The invention discloses a preparation method for nanometer yttrium oxide powder, belonging to the technical field of preparing superfine rare earth powder. The method comprises the steps of dropping yttrium-containing inorganic acid salt in alcohol-water mixed solution which contains a precipitant and a static stabilizing agent, then adding a surfactant after finishing dropping, stirring, aging and separating the reaction system to obtain precipitate, then carrying out cleaning and washing, vacuum drying and calcinating to the precipitate to obtain the nanometer yttrium oxide powder. According to the preparation method, by applying the back titration, alcohol-water mixture solution and surfactant, not only can yttrium ions be favorably separated out and crystallized, but also the particle size of the crystals and the specific surface area of the crystal particles can be better controlled, so that the prepared nanometer yttrium oxide powder has smaller particle size, narrow particle size distribution and larger specific surface area, thus further having higher sintering activity; the preparation method is simple in technology, short in synthesis route, easy to control, capable of remarkably improving the purity and yield of products, and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of rare earth ultrafine powder, in particular to a preparation method of nanometer yttrium oxide powder. Background technique [0002] Yttrium oxide is an important rare earth oxide. Its nanopowder has good optical, electrical, magnetic, mechanical and chemical properties, and is widely used in functional ceramic materials, luminescent materials, laser materials and other fields. Among them, nano-yttrium oxide powder with high purity, high specific surface area, small particle size and narrow particle size distribution is the best choice for preparing yttrium aluminum garnet transparent ceramics, yttrium oxide transparent ceramics, oxide The key factor of transparent ceramics such as gadolinium yttrium transparent ceramics. [0003] The existing technology adopts chemical precipitation method to prepare nano-yttrium oxide powder. By adding a precipitant to the yttrium salt solution, the anion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 张月娟李兴旺莫小刚王永国杜秀红朱建慧王军杰
Owner 北京雷生强式科技有限责任公司
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