Method for preparing Yb3Al5O12 nano powder by urea precipitation method

A yb3al5o12, nano-powder technology, applied in the direction of alumina/aluminum hydroxide, etc., to achieve good steric hindrance and prevent particle agglomeration

Inactive Publication Date: 2008-07-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for preparing Yb3Al5O12 nano powder by urea precipitation method
  • Method for preparing Yb3Al5O12 nano powder by urea precipitation method
  • Method for preparing Yb3Al5O12 nano powder by urea precipitation method

Examples

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Embodiment 1

[0027] High-purity commercial Yb with a purity of 99.99% 2 o 3 The powder was dissolved in nitric acid, and deionized water was added to make Yb(NO 3 ) 3 Solution 300ml. Purity is 99.9% Al (NO 3 ) 3 9H 2 O was prepared into 500ml of a 1 M solution, and the two solutions were mixed and fully stirred evenly to obtain the mother liquor. Add deionized water to the mother liquor to make the mother liquor reach 1000ml, and add 2 grams of HPC as a dispersant. Add 720 grams of urea and stir well. Heat the mother liquor to 95°C with an oil bath, increase the stirring speed, keep the temperature for 2 hours, and then drop to room temperature. Wash 5 times with deionized water in a suction filtration device, then wash 3 times with absolute ethanol, and dry the product obtained by suction filtration in a drying oven at 120° C. for 24 hours. The dried precursor is calcined in air at 900°C-1200°C for 2 hours.

[0028] Figure 2 is the XRD pattern of the precursor after calcination a...

Embodiment 2

[0032] High-purity commercial Yb with a purity of 99.99% 2 o 3 The powder was dissolved in nitric acid, and deionized water was added to make Yb(NO 3 ) 3 Solution 300ml. Purity is 99.9% Al (NO 3 ) 3 9H 2 O was prepared into 250ml of a 2M solution, and the two solutions were mixed and fully stirred evenly to obtain a mother liquor. Add deionized water in mother liquor, make mother liquor reach 800ml, and add 1 gram (NH 4 ) 2 SO 4 as a dispersant. Add 720 grams of urea and stir well. The mother liquor was heated to 100°C with an oil bath, and the stirring speed was accelerated, kept at 100°C for 5 hours, and then lowered to room temperature. Wash 6 times in a suction filtration device with deionized water, then wash 3 times with absolute ethanol, and dry the product obtained by suction filtration in a drying oven at 120° C. for 20 hours. The dried precursor is calcined in air at 900°C-1200°C for 2 hours. After calcining at 900°C, a pure-phase YbAG powder is obtained,...

Embodiment 3

[0034] High-purity commercial Yb with a purity of 99.99% 2 o 3 The powder was dissolved in nitric acid, and deionized water was added to make Yb(NO 3 ) 3 Solution 600ml. Purity is 99.9% Al (NO 3 ) 3 9H 2 O was prepared into 500ml of 2M solution, and the two solutions were mixed and fully stirred evenly to obtain the mother liquor. Add deionized water to the mother liquor to make the mother liquor reach 1500ml, and add 5 grams of HPC as a dispersant. Add 1440 grams of urea and stir well. The mother liquor was heated to 100°C with an oil bath, and the stirring speed was accelerated, kept at 100°C for 5 hours, and then lowered to room temperature. Wash 5 times with deionized water in a suction filtration device, then wash 3 times with absolute ethanol, and dry the product obtained by suction filtration in a drying oven at 120° C. for 24 hours. The dried precursor is calcined in air at 900°C-1200°C for 2 hours. After calcining at 900°C, a pure-phase YbAG powder is obtaine...

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Abstract

The invention provides a process for preparing nano single-phase powder of Yb3Al5O12 with perfect dispersibility, which is characterized by employing high-purity commercial aluminum nitrate and ytterbium oxide as raw material, initially dissolving ytterbium oxide into concentrated nitric acid to formulate solution with certain concentration, then adding aluminum nitrate solution according to ytterbium-aluminum ratio of 3:5 to obtain mother liquor, and then adding deionized water to enable the aluminum ion concentration of the mother liquor to be 0.1-1mol/L. Carbamide is taken as precipitating agent, the mole ratio of Carbamide and metal salt ions is controlled between 5:1 and 30:1, and the temperature and time are controlled to enable ytterbium and aluminum ions to completely deposit to obtain sediment. Amorphous precursor is calcined to directly crystallize into single phase of Yb3Al5O12 of 20-30nm at a temperature of 900 DEG C and a spot of hydroxypropyl cellulose (HPC) or (NH4)2SO4 is added in the reaction system as dispersing agent, which can enable the grain fineness distribution and sintering property of Yb3Al5O12 to be remarkably improved, and shortage that powers prepared by wet method are easy in agglomerating, hard in washing, large grain size and the like can be effectively resolved.

Description

technical field [0001] The present invention relates to a kind of urea precipitation method to prepare Yb 3 Al 5 o 12 The method for nanometer powder belongs to the field of preparation of ceramic nanometer powder. Background technique [0002] YAG (yttrium aluminum garnet) single crystal has the characteristics of high thermal conductivity, chemical stability and good processability, and is currently the most widely used solid-state laser medium. However, since single crystals are currently mainly grown by the pulling method, not only the growth period is long, the price is expensive, but also it is difficult to obtain large-sized crystals, which hinders the application of Nd:YAG single crystals. In 1995, Ikesue and others prepared Nd: YAG transparent laser ceramics by solid-state reaction method and obtained laser output for the first time. Since then, YAG transparent ceramics have been greatly developed, and many countries are committed to the research of Nd: YAG tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02C04B35/44C04B35/626
Inventor 吴玉松李江潘裕柏刘文斌郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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