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Microwave burning preparation method of nano gadolinium oxide powder

A technology of nano-gadolinium oxide and microwave combustion, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of long preparation process and cumbersome process, and achieve the promotion of powder crystallization, uniform heat distribution, and difficulty in agglomeration Effect

Inactive Publication Date: 2015-10-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Preparation of Nano-gadolinium Oxide / NBR Composite Material and Research on Its Shielding Properties", Zhao Yongfeng et al., Rubber Industry, 2010, 581-585, prepared nano-scale gadolinium oxide by combining coprecipitation method and spray drying method and calcined at high temperature, but relatively The preparation process takes a long time and the process is relatively cumbersome

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  • Microwave burning preparation method of nano gadolinium oxide powder
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  • Microwave burning preparation method of nano gadolinium oxide powder

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Embodiment 1

[0033] A method for preparing nanometer gadolinium oxide powder by microwave combustion, comprising the following steps:

[0034] (1) Configure Gd(NO 3 ) 3 Solution: Weigh 20g of micron-sized gadolinium oxide powder, dilute 31.2g of concentrated nitric acid with a mass fraction of 69% to 35wt% with 28.2g of deionized water, by molar ratio Gd 2 o 3 :HNO 3 =1:6, configure Gd(NO 3 ) 3 Solution, put the solution in a 500ml beaker, stir and dissolve it with a magnetic stirrer, and disperse it by ultrasonic for 5min;

[0035] (2) Gadolinium nitrate solution is mixed with citric acid: take 92.4g monohydrate citric acid and dissolve it in 150ml water, by molar ratio Gd 3+ :C 6 h 8 o 7 ·H 2 O=4:1 Prepare the precursor solution, place it in a constant temperature water bath at 50°C, and stir it magnetically for 10 minutes;

[0036] (3) Adjust the pH value: add ammonia water dropwise to the precursor solution to adjust the pH value to 8;

[0037] (4) Microwave combustion synt...

Embodiment 2

[0042] A method for preparing nanometer gadolinium oxide powder by microwave combustion, comprising the following steps:

[0043] (1) Configure Gd(NO 3 ) 3 Solution: take by weighing 20g micron grade gadolinium oxide powder, 36.6g mass fraction 68% concentrated nitric acid is diluted to 35wt% with 32.9g deionized water concentrated nitric acid, by molar ratio Gd 2 o 3 :HNO 3 =1:7 configure Gd(NO 3 ) 3 Solution, put the solution in a 500ml beaker, stir and dissolve it with a magnetic stirrer, and disperse it ultrasonically for 5 minutes;

[0044] (2) Gadolinium nitrate solution is mixed with citric acid: take 92.4g monohydrate citric acid and dissolve it in 150ml water, by molar ratio Gd 3+ :C 6 h 8 o 7 ·H 2 O=4:1 Prepare the precursor solution, place it in a constant temperature water bath at 50°C, and stir it magnetically for 10 minutes;

[0045] (3) Adjust the pH value: add ammonia water dropwise to the precursor solution to adjust the pH value to 10;

[0046] (4...

Embodiment 3

[0050] A method for preparing nanometer gadolinium oxide powder by microwave combustion, comprising the following steps:

[0051] (1) Configure Gd(NO 3 ) 3 Solution: Weigh 20g of micron-sized gadolinium oxide powder, 36.6g of mass fraction 68% concentrated nitric acid, dilute the concentrated nitric acid to 35wt% with 28.2g of deionized water, by molar ratio Gd 2 o 3 :HNO 3 =1:8 configure Gd(NO 3 ) 3 Solution, put the solution in a 500ml beaker, stir and dissolve it with a magnetic stirrer, and disperse it ultrasonically for 5 minutes;

[0052] (2) Gadolinium nitrate solution is mixed with citric acid: take 92.4g monohydrate citric acid and dissolve it in 150ml, by molar ratio Gd 3+ :C 6 h 8 o 7 ·H 2 O=4:1.5 Prepare the precursor solution, place it in a constant temperature water bath at 50°C, and stir it magnetically for 10 minutes;

[0053] (3) adjust the pH value: add ammonia water dropwise to the precursor solution to adjust the pH value to 9;

[0054] (4) Micr...

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Abstract

The invention relates to a microwave burning preparation method of nano gadolinium oxide powder. The preparation method comprises the following steps: (1) mixing gadolinium oxide powder with a nitric acid solution to prepare a gadolinium nitrate solution; (2) evenly mixing the gadolinium nitrate solution with a critic acid solution according to a mole ratio of Gd3+ to citric acid of 4:(1-2) to obtain a precursor solution; (3) adjusting the pH value of the precursor solution to 8-10; (4) burning the precursor solution with an adjusted pH value by microwaves to obtain white powder; (5) burning the white powder for 2 to 5 hours at a constant temperature of 450 to 800 DEG C; (6) ball-grinding the burned white powder, and drying to obtain the target product. The preparation method adopts a microwave burning synthesis method, the microwave energy is utilized to vibrate the inner molecules in the precursor so as to generate heat, and the heat energy is evenly distributed.

Description

(1) Technical field [0001] The invention relates to a preparation method of nano-scale gadolinium oxide powder, which belongs to the field of material preparation. (2) Background technology [0002] The preparation of nano-ceramic powder is the primary problem in the industrialization of nano-ceramic materials and other related nano-materials. The main preparation methods include solid-phase method, liquid-phase method and gas-phase method. Since the 1990s, nano-ceramic powders have entered the stage of industrial development. At present, wet chemical method and vapor deposition method are mainly used in my country to prepare industrial nano-ceramic powder. The main products include CaCO 3 , ZnO, Al 2 o 3 , SiO x 、TiO 2 、Si 3 N 4 and SiC etc. [0003] Nano-gadolinium oxide powder can be used in various phosphors, neutron absorbing materials in atomic reactors, magnetic bubble materials, and intensifying screen materials. It also has certain applications in optical g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y30/00
Inventor 张玉军张羽白龚红宇张衍双
Owner SHANDONG UNIV
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