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Pure and 2mol% Sm 2 O 3 -doped ZrO 2 nanopowders were synthesized via the precipitation method. The very lower activation energy (~25.979 kJ/mol) related to the bulk counterpart is observed for the grain growth within the calcination temperature range of 600-1000 o C. Experimental results show that two factors were contributed to the lower activation energy of grain...
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