Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0167-2738(99)00275-1
Title: How different is mechanical activation from thermal activation? A case study with PZN and PZN-based relaxors
Authors: Wang, J. 
Xue, J. 
Wan, D. 
Issue Date: 1-Jan-2000
Source: Wang, J., Xue, J., Wan, D. (2000-01-01). How different is mechanical activation from thermal activation? A case study with PZN and PZN-based relaxors. Solid State Ionics 127 (1-2) : 169-175. ScholarBank@NUS Repository. https://doi.org/10.1016/S0167-2738(99)00275-1
Abstract: Using Pb(Zn1/3Nb2/3)O3 (PZN) and PZN-based relaxor ferroelectrics, we demonstrate that the solid state reactions triggered by mechanical activation of mixed oxides can proceed via a completely different route from that in the conventional solid state reactions, where the process is controlled by one or more interfacial reactions and diffusions. Nanocrystallites of perovskite Pb(Zn1/3Nb2/3)O3 are formed in a highly activated state of mixed oxides where a degree of amorphization has taken place, followed by a steady growth with increasing degree of mechanical activation. The absence of transitional pyrochlores, such as the Pb3Nb4O13-type phases which have always been observed in the conventional solid state reactions, and the considerably low local temperature at the collision points suggest that the perovskite phase occurs via a process involving nucleation and subsequent diffusionless growth.
Source Title: Solid State Ionics
URI: http://scholarbank.nus.edu.sg/handle/10635/107070
ISSN: 01672738
DOI: 10.1016/S0167-2738(99)00275-1
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