“…Table 1 compares the experimental conditions and the results reported in those works. Cosentino and Mucillo [23,25] had prepared fine powders of n mol% Y 2 O 3 -ThO 2 (n ¼ 3, 6, 9 and 12) by the combustion method using 3:2 ratio by mass of citric acid and ethylene glycol as fuel. Pellet compacts of these powders achieved %90-95% th.d.…”