Yttrium oxide powder and preparation method thereof

A technology of yttrium oxide and powder, which is applied in the field of yttrium oxide powder and its preparation, can solve the problems of inability and small contact surface of alloy, and achieve the effects of wide application, strong binding ability and fine grain size.

Active Publication Date: 2017-08-08
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Nanorod yttrium oxide has a small contact surface with the alloy during the alloy preparation process, and cannot better strengthen and stabilize the matrix phase.

Method used

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  • Yttrium oxide powder and preparation method thereof
  • Yttrium oxide powder and preparation method thereof

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Experimental program
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Embodiment 1

[0029] The preparation method of the present embodiment yttrium oxide powder comprises the following steps:

[0030] 1) Weigh 5 g of yttrium nitrate hexahydrate, add 10 mL of glycerol, and then add 45 mL of deionized water to obtain solution A, drop ammonia water into solution A to adjust pH=8, and obtain mixed solution B;

[0031] 2) Put the mixed solution B obtained in step 1) into a 100mL polytetrafluoroethylene-lined autoclave, react in an oven at 170°C for 15h, vacuum filter the precipitate obtained from the reaction, and wash it with deionized water for 5 h Second, vacuum-dry at 60°C for 4 hours in a drying oven to obtain the precursor powder;

[0032] 3) The precursor powder obtained in step 2) was ground, then calcined in a muffle furnace at 600° C. for 3 h, and air-cooled to room temperature to obtain carambola-like yttrium oxide powder.

Embodiment 2

[0034] The preparation method of the present embodiment yttrium oxide powder comprises the following steps:

[0035] 1) Weigh 5 g of yttrium nitrate hexahydrate, add 15 mL of glycerol, and then add 40 mL of deionized water to obtain solution A, drop ammonia water into solution A to adjust the pH to 9, and obtain mixed solution B;

[0036] 2) Put the mixed solution B obtained in step 1) into a 100mL polytetrafluoroethylene-lined autoclave, react in an oven at 160°C for 14h, vacuum filter the precipitate obtained from the reaction, wash it with deionized water for 5 Second, dry in vacuum at 70°C for 5 hours in a drying oven to obtain precursor powder;

[0037] 3) The precursor powder obtained in step 2) was ground, then calcined in a muffle furnace at 700° C. for 2 h, and air-cooled to room temperature to obtain carambola-like yttrium oxide powder.

Embodiment 3

[0039] The preparation method of the present embodiment yttrium oxide powder comprises the following steps:

[0040] 1) Weigh 5 g of yttrium nitrate hexahydrate, add 12 mL of glycerol, and then add 42 mL of deionized water to obtain solution A, drop ammonia water into solution A to adjust pH=10, and obtain mixed solution B;

[0041] 2) Put the mixed solution B obtained in step 1) into a 100mL polytetrafluoroethylene-lined autoclave, react in an oven at 170°C for 16h, vacuum filter the precipitate obtained from the reaction, and wash it with deionized water for 6 hours. Second, vacuum-dry at 60°C for 4 hours in a drying oven to obtain the precursor powder;

[0042] 3) The precursor powder obtained in step 2) was ground, then calcined in a muffle furnace at 600° C. for 2 h, and air-cooled to room temperature to obtain carambola-shaped yttrium oxide powder.

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Abstract

The invention relates to yttrium oxide powder and a preparation method thereof, and belongs to a material preparation process. The preparation method of the yttrium oxide powder comprises the following steps: 1) dissolving yttrium nitrate into glycerol and water, adjusting the pH value to be 8 to 10, and reacting at 160 to 170 DEG C for 14 to 16 hours to obtain reaction liquid; 2) filtering the reaction liquid obtained in the step 1), and washing and drying the obtained precipitate to obtain precursor powder; 3) calcining the precursor powder obtained in the step 2) at 600 to 700 DEG C for 2 to 3 hours to obtain the yttrium oxide powder. The submicron-grade carambola-shaped yttrium oxide powder obtained by the preparation method provided by the invention has large specific surface area; when the submicron-grade carambola-shaped yttrium oxide powder serves as a reinforced phase of a metal material, the special groove structure of the carambola-shaped yttrium oxide can be fixed in the matrix of the metal material well, increment of the matrix can be limited effectively, the crystalline grain is fine, and the yttrium oxide powder can be applied widely.

Description

technical field [0001] The invention relates to yttrium oxide powder and a preparation method thereof, belonging to a material preparation process. Background technique [0002] With the advancement of science and technology, superconducting materials, ceramic materials, and fluorescent materials have developed rapidly, and the preparation and application of rare earth powders have also received extensive attention. The rare earth oxide yttrium oxide has a strong oxide dispersion strengthening effect in superalloys, and is widely used in fluorescent materials, high-strength alloys and super heat-resistant alloys. Therefore, the preparation of yttrium oxide powder has become one of the research hotspots. [0003] Wang Ying et al. published a report on "Study on the Growth Process and Growth Mechanism of Hydrothermally Synthesized Rod-shaped Yttrium Oxide Powder" in Functional Materials in 2013. The specific preparation method is: dissolving 0.58g of yttrium nitrate hexahydra...

Claims

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Application Information

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IPC IPC(8): C01F17/00
CPCC01F17/206C01P2002/72C01P2004/03C01P2004/61
Inventor 徐流杰魏世忠窦彩虹周玉成潘昆明李秀青李继文刘伟徐锐
Owner HENAN UNIV OF SCI & TECH
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