Synthesis and in situ ion irradiation of A-site deficient zirconate perovskite ceramics

Abstract

The influence of A-site vacancies on zirconate perovskite structured ceramics of formula A1−xLa2x/3ZrO3 (A = Ca, Sr, Ba) has been investigated using 400 keV Kr+in situ ion irradiation in a TEM with varied temperature from 100 K to 673 K.

Simulation of radiation damage via alpha decay in BFS:PC grouts using 4He2+ ion acceleration

“…There are similarities between the features seen here and with He bubble formation observed in glass implanted with He 2+ ions [44], and with voids caused by the accumulation of irradiation induced vacancies seen in ceramics [45]. In-situ observation of void formation in ceramics saw agglomeration and migration of these features towards grain boundaries [45]. Given the sharp textural break observed in Fig.…”

“…The possibility that He 2+ irradiation contributed either fully or partly to the formation of these zones must likewise be considered. There are similarities between the features seen here and with He bubble formation observed in glass implanted with He 2+ ions [44], and with voids caused by the accumulation of irradiation induced vacancies seen in ceramics [45]. In-situ observation of void formation in ceramics saw agglomeration and migration of these features towards grain boundaries [45].…”

Impact of Ni–Mn–Co–Al-Based Cathode Material Composition on the Sintering with Garnet Solid Electrolytes for All-Solid-State Batteries

“…A perovskite structure is possible with Ca 2+ , which has a similar ionic radius to La 3+ in 12-fold coordination, although literature values for the lattice parameters differ considerably, e.g., a = 4.01 Å in vs a = 5.59 Å in . Alternatively, La-site deficient perovskites La 2/3 ZrO 3 as published in , may be taken into consideration, where nominal charge neutrality is given. With view to ionic radii, also Li and Ta ions with six-fold coordination would fit into the perovskite lattice.…”

Structured Catalyst for Indirect Internal Reforming (IIR) of Biogas in Solid Oxide Fuel Cell (SOFC)

“…CZS peaks are shifted toward 2θ lower values as compared to the CaZrO3 reference pa ern. The radius of the six−fold coordinated Sm 3+ (0.958 Å) is larger than that of Zr 4+ (0.72 Å), and thus, Sm doping increases the unit cell volume shifting the pa ern toward lower values [31,32]. R3CZS peaks are slightly further left−shifted, as a minor part of 3 wt% Ru might have been included in the perovskite la ice.…”