Sustainable synthesis of composite ceramics using in situ synchrotron X-ray diffraction for effective immobilization of Sr-90 and its fission products

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-12-31 DOI:10.1007/s10967-024-09954-0

E. K. Papynov, A. A. Belov, O. O. Shichalin, A. P. Zavjalov, I. Yu. Buravlev, A. N. Drankov, S. A. Azon, A. N. Fedorets, A. A. Buravleva, S. B. Yarusova, V. Yu. Mayorov, N. B. Kondrikov, I. G. Tananaev, V. I. Sergienko

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Abstract

In this work the method of obtaining composite ceramics based on perovskite and pyrochlore of compositions Y_xZr_xSr_1-3xTiO₃ (x = 0.1, x = 0.2, x = 0.3) and Y₂(Zr_xTi)₂O₇ (x = 1) using the technology of reactive spark plasma sintering has been investigated. A comprehensive study of phase transformations, structure formation and physical and mechanical characteristics of ceramics depending on the ratio of Sr²⁺/Y³⁺/Zr⁴⁺ has been carried out by XRD, SEM, EDS and “diffraction movie” methods at the synchrotron radiation source. High hydrolytic stability of ceramics is proved and the mechanism of low leaching rate of Sr²⁺ < 10^–7 g cm⁻² day, Y³⁺ and Zr⁴⁺ < 10^–5 g cm⁻² day is described, which corresponds to GOST R 50926-96 and ANSI/ANS 16.1. The results of the work are promising for conditioning of radioactive waste and production of radioisotope products.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.