One-pot synthesis of Ln2Sn2O7 pyrochlore and MgAl2O4 spinel by soft chemistry route as potential inert matrix fuel system, and the microstructural analysis

Synthesis of yttrium titanate stannate (Y2Ti2−xSnxO7, x = 0–2) pyrochlore glass–ceramics as potential nuclear waste form

“…This can be visually seen by the uniformity of the SEM images for most samples, and only a few sparsely scattered voids are observed for Y 2 Sn 2 O 7 system. It has been observed in our previous work 62,63 that it is difficult to eliminate the interstitial pores between the particles involving high proportion of tin oxide during the calcination. Owning to the intrinsic low sinterability of SnO 2 , the grain growth and the particle aggregation/agglomeration during sintering without promoting densification result in the formation of the physical porosity.…”

Synthesis and feasibility studies of doping U at Ti site of Y2Ti2O7 as a radioactive waste immobilization matrix

“…[13][14][15][16][17][18][19][20] These classes of matrices offer a steady and strong lattice for immobilization of radio nuclides from spent nuclear fuel, and in addition have wide application as an inert matrix. 21 Pyrochlores, in particular, have many remarkable physical characteristics that are of high technological importance as these materials exhibit tremendous applicability in oxygen mobility 22 and catalytic chattels 23 apart from their applications in other numerous areas such as ferroelectricity, 24 fast ionic conductivity, 25 superconducting materials, 26 etc. In addition to high chemical, radiation and thermodynamic stability compared to the commercially used borosilicate glasses, pyrochlores also exhibit the least risk of leaching.…”

Study of Radiation-Induced Damage Processes in CeZrO4–YZrO3 Ceramics Caused by Helium Irradiation

“…Over the past few years, the nuclear power industry has been actively considering the possibility of switching from traditional nuclear fuel based on uranium dioxide to dispersed nuclear fuel, in which plutonium (usually weapons-grade) is placed in an inert matrix, serving mainly as an absorber of fission fragments, as well as products of nuclear reactions during the interaction of fissile fuel with neutrons acts as the primary fissile material [1][2][3]. Interest in this type of fuel cells or fuel assemblies is primarily due to the possibility of using stocks of weapons-grade plutonium for peaceful energy production and reducing the concentration of fission products and nuclear waste in the production of electricity [4,5]. At the same time, the use of such a type of fuel makes it possible to expand the potential of using nuclear fuel by increasing the burnup efficiency and the operating temperature of the core, as well as increasing the service life of fuel elements, which are due to their radiation damage accumulation resistance [6,7].…”