Microspheres and Pellets of UO2 Prepared Via ADU by Complex Sol-Gel Process and ICHTJ Process

• Autorzy: Brykala M. , Rogowski M. , Wawszczak D. , Olczak T. , Smolinski T.

Identyfikatory

DOI

10.24425/amm.2020.133706

• Języki publikacji: EN

Abstrakty

EN

This study is devoted to synthesis and characterization of uranium dioxide microspheres (Ø < 100 μm) and pellets by application of powder-free process called the Complex Sol-Gel Process. The precursors of prepared sols were ascorbic acid solution with dissolved a freshly precipitated ammonium diuranate. The microspheres of uranyl-ascorbate gel were obtained using the ICHTJ Process. The pellets were formed by pressing and sintering of uranium dioxide powder. Studies allowed determining an optimal heat treatment of calcination, reduction and sintering processes at temperatures of 700°C, 900°C and 1300°C, respectively. The main parameters which play a key role in the process of synthesis method and features of the pellets and microspheres of uranium dioxide are described in this article.

Słowa kluczowe

EN

uranium dioxide; microspheres; pellets; Complex Sol-Gel Process; ICHTJ Process

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 4
• Strony: 1397--1404
• Opis fizyczny: BIbliogr. 22 poz., fot., rys., tab., wzory

Twórcy

autor

Brykala M.

• Institute of Nuclear Chemistry and Technology (INCT), Centre of Radiochemistry and Nuclear Chemistry, 16 Dorodna Str., 03-195 Warszawa, Poland

autor

Rogowski M.

• Institute of Nuclear Chemistry and Technology (INCT), Centre of Radiochemistry and Nuclear Chemistry, 16 Dorodna Str., 03-195 Warszawa, Poland

autor

Wawszczak D.

• Institute of Nuclear Chemistry and Technology (INCT), Centre of Radiochemistry and Nuclear Chemistry, 16 Dorodna Str., 03-195 Warszawa, Poland

autor

Olczak T.

• Institute of Nuclear Chemistry and Technology (INCT), Centre of Radiochemistry and Nuclear Chemistry, 16 Dorodna Str., 03-195 Warszawa, Poland

autor

Smolinski T.

• Institute of Nuclear Chemistry and Technology (INCT), Centre of Radiochemistry and Nuclear Chemistry, 16 Dorodna Str., 03-195 Warszawa, Poland

Bibliografia

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Uwagi

EN

This work is one part of the studies in the Polish Governmental Project “Technology Supporting the Development of Safe Nuclear Power,” (SP/J/3/143 045/11), from The National Centre for Research and Development (NCBiR), Poland over the period 2011-2014. The authors give special thanks to R. Laskowska and K. Godlewska for works on preparation of sol solutions and gelation to gels microspheres, Dr A. Deptula and MSc W. Lada for their support and friendly help, Dr. B. Sartowska for SEM analysis.