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2 565 712

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IPC

C01G27/00(2006-01-01)

C01F17/00(2006-01-01)

C04B35/48(2006-01-01)

C04B35/50(2006-01-01)

B82B3/00(2006-01-01)

B82Y40/00(2011-01-01)

G21C7/24(2006-01-01)

B01J19/12(2006-01-01)

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Application

2014104483/05, 2014-02-07

(24)

Start date

2014-02-07

(22)

Actual filing date

2014-02-07

(45)

Published

2015-10-20

(72)

Inventor

Popov Viktor VladimirovichPetrunin Vadim FedorovichKorovin Sergej Aleksandrovich

(73)

Holder

Rossijskaja Federatsija, Ot Imeni Kotoroj Vystupaet Gosudarstvennaja Korporatsija Po Atomnoj EhnergiiFederal'Noe Gosudarstvennoe Avtonomnoe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Issledovatel'Skij Jadernyj Universitet Mifi)

METHOD OF OBTAINING NANOCRYSTALLINE DYSPROSIUM HAFNATE POWDERS AND THEREOF-BASED CERAMIC MATERIALS Russian patent published in 2015 - IPC C01G27/00 C01F17/00 C04B35/48 C04B35/50 B82B3/00 B82Y40/00 G21C7/24 B01J19/12

Abstract RU 2565712 C2

FIELD: chemistry.

SUBSTANCE: invention can be used in manufacturing neutron-absorbing materials for control rods in systems of control and protection of nuclear reactors. Method for obtaining ceramic materials based on nanocrystalline dysprosium hafnate powders includes production of mixed dysprosium and hafnium hydroxide by dissolution of salts HfOCl₂·8H₂O and Dy(NO₃)₃·5H₂O in water and addition of obtained solution to ammonia solution. After that, filtration and washing of obtained sediment, drying with further calcination to obtain dysprosium hafnate, its milling, pressing and annealing of obtained compacts are carried out. Stage of drying and calcinations of mixed hydroxide is carried out under impact of SHF-radiation with continuous power 1.5-6.0 kW. Temperature is changed step-by-step within 1.0-1.5 hour until nanocrystalline dysprosium hafnate powder is obtained.

EFFECT: invention makes it possible to reduce duration of drying and calcinations of mixed dysprosium and hafnium hydroxide and obtain ceramic materials with high density.

4 ex

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RU 2 565 712 C2

Authors

Popov Viktor Vladimirovich

Petrunin Vadim Fedorovich

Korovin Sergej Aleksandrovich

Dates

2015-10-20—Published

2014-02-07—Filed