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Preparation method of nano gadolinium oxide powder with large specific surface area

A technology of nano-gadolinium oxide and large specific surface area, which is applied in nanotechnology, chemical instruments and methods, nanotechnology, etc. for materials and surface science. Small and other problems, to achieve the effect of preventing agglomeration, uniform distribution, and uniform dispersion

Active Publication Date: 2018-10-23
CHANGZHOU GEOQUIN NANO NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are some problems in the process of preparing nano-gadolinium oxide powder. The commonly used precipitation method needs to use ammonium salt as a precipitant. Ammonium ions pollute the environment, and the treatment of ammonium ions will increase the cost. The particles become larger, the specific surface area is smaller, and the second phase of impurities is easy to exist; hydrothermal method, sol-gel method and other methods, the products have precise chemical composition and uniform particle distribution, but the output is too small to achieve mass production

Method used

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  • Preparation method of nano gadolinium oxide powder with large specific surface area
  • Preparation method of nano gadolinium oxide powder with large specific surface area
  • Preparation method of nano gadolinium oxide powder with large specific surface area

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Embodiment 1

[0041] A preparation method of nano gadolinium oxide powder with large specific surface area, comprising the following steps:

[0042] (1) Prepare gadolinium-containing inorganic salt solution: take 68.97L of 1.6mol / L gadolinium chloride solution (20kg of gadolinium oxide) and put it into a reaction tank, add 482.8L deionized water, and prepare a chloride solution with a concentration of 0.2mol / L Gadolinium solution;

[0043] (2) Get dehydrated alcohol: 1kg respectively, polyethylene glycol 2000: 0.3kg, sodium dodecylbenzenesulfonate: 0.3kg, add polyethylene glycol 2000 and sodium dodecylbenzenesulfonate respectively without Fully stir in water and ethanol to prepare surfactant;

[0044] (3) The prepared surfactant is added in the gadolinium chloride solution, fully mixed to uniform;

[0045] (4) Take 0.8kg of sodium carbonate, add 7.55L of deionized water to fully dissolve it, and prepare a 1mol / L sodium carbonate solution, add the sodium carbonate solution to the gadoliniu...

Embodiment 2

[0051] (1) Prepare gadolinium-containing inorganic salt solution: take 68.97L of 1.6mol / L gadolinium chloride solution (gadolinium oxide 20kg) and put it into a reaction tank, add 298.9L deionized water to prepare a 0.3mol / L gadolinium chloride solution ;

[0052] (2) Take absolute ethanol: 1kg, polyethylene glycol 2000: 0.4kg, sodium dodecylbenzenesulfonate: 0.2kg respectively, add polyethylene glycol 2000 and sodium dodecylbenzenesulfonate respectively without Fully stir in water and ethanol to prepare surfactant;

[0053] (3) The prepared surfactant is added in the gadolinium chloride solution, fully mixed to uniform;

[0054] (4) Take 0.8kg of sodium carbonate, add 15.1L of deionized water to fully dissolve, and prepare a 0.5mol / L sodium carbonate solution, add the sodium carbonate solution to the gadolinium chloride solution at a flow rate of 0.5L / min, and adjust the pH value to 4;

[0055] (5) Take 7.2kg of high-purity sodium hydroxide powder, add 600L deionized water...

Embodiment 3

[0060] (1) Preparation of gadolinium-containing inorganic salt solution: take 68.97L of 1.6mol / L gadolinium nitrate solution (20kg of gadolinium oxide) and put it into a reaction tank, add 551.7L of deionized water, and prepare a 0.2mol / L gadolinium chloride solution;

[0061] (2) Take absolute ethanol: 1kg, polyethylene glycol 2000: 0.3kg, sodium dodecylbenzenesulfonate: 0.2kg respectively, add polyethylene glycol 2000 and sodium dodecylbenzenesulfonate respectively without Fully stir in water and ethanol to prepare surfactant;

[0062] (3) The prepared surfactant is added in the gadolinium chloride solution, fully mixed to uniform;

[0063] (4) Take 0.8kg of sodium carbonate, add 9.43L of deionized water to fully dissolve, and prepare a 0.8mol / L sodium carbonate solution, add the sodium carbonate solution to the gadolinium chloride solution at a flow rate of 0.5L / min, and adjust the pH value to 4;

[0064] (5) Take 7.2kg of high-purity sodium hydroxide powder, add 600L dei...

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Abstract

The invention belongs to the field of preparation of nano rare earth materials, and particularly provides a preparation method of nano gadolinium oxide powder with the large specific surface area. Thepreparation method comprises the following steps that an inorganic salt water solution containing gadolinium is uniformly mixed with a surface active agent to prepare a precursor solution, the pH value of the precursor solution is conditioned to be 3.5-4 by using a sodium carbonate solution, the pH value of the precursor solution is conditioned to be 8.5-9.5 by using a well-prepared high-purity sodium hydroxide solution, filtration, washing and drying are conducted, and the gadolinium oxide nano powder is obtained after high-temperature calcination is conducted at the temperature of 700-850 DEG C, wherein the granular size of the gadolinium oxide nano powder is 30-60nm, the BET (specific surface area) is 50-60, and the granules are distributed uniformly.

Description

technical field [0001] The invention belongs to the field of preparation of nano-rare earth materials, in particular to a preparation method of nano-gadolinium oxide powder with a large specific surface area. Background technique [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 , SiOx, 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...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y30/00
CPCB82Y30/00C01F17/206C01P2004/03C01P2004/64
Inventor 龚晔
Owner CHANGZHOU GEOQUIN NANO NEW MATERIALS
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