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|Title:||Perovskite nanocrystallite of PMN-based ferroelectrics by mechanical activation|
|Authors:||Xue, J.M. |
Lead magnesium niobate
|Source:||Xue, J.M.,Wang, J.,Wan, D.M.,Gan, B.K. (2001). Perovskite nanocrystallite of PMN-based ferroelectrics by mechanical activation. Ferroelectrics 253 (1-4) : 577/21-577/30. ScholarBank@NUS Repository.|
|Abstract:||Nanocrystallites of Pb(Mg1/3Nb2/3)O3(PMN)-based perovskite structure are formed at room temperature by mechanical activation of the constituent oxides. The activation-triggered occurrence of perovskite nanocrystallites in the oxide compositions proceeds via a process involving nucleation and subsequent growth of perovskite crystallites with increasing degree of mechanical activation. This is fundamentally different from the one or more interfacial reactions and diffusions responsible for a thermally activated solid state reaction occurring at an elevated temperature. Nucleation occurs in a highly activated state, where a degree of amorphization has taken place, and the subsequent growth proceeds as a result of the constant collisions and rearrangement of perovskite nuclei.|
|Appears in Collections:||Staff Publications|
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