Please use this identifier to cite or link to this item: https://doi.org/10.1006/jssc.2000.8782
Title: Mechanically activating nucleation and growth of complex perovskites
Authors: Wang, J. 
Xue, J.M. 
Wan, D.M. 
Gan, B.K.
Keywords: Crystallite growth
Lead magnesium niobate
Lead zirconate tinnate.
Mechanical activation
Nucleation
Perovskites
Issue Date: 2000
Source: Wang, J., Xue, J.M., Wan, D.M., Gan, B.K. (2000). Mechanically activating nucleation and growth of complex perovskites. Journal of Solid State Chemistry 154 (2) : 321-328. ScholarBank@NUS Repository. https://doi.org/10.1006/jssc.2000.8782
Abstract: Mechanical activation of the constituent oxides at room temperature led to the formation of nanocrystalline Pb-based relaxor ferroelectrics and piezoelectrics of complex perovskite structure. The activation-triggered occurrence of complex perovskites, such as Pb(Mg(1/3)Nb(2/3))O3, 0.9[0.4Pb(Mg(1/3)Nb(2/3))O3-0.6Pb(Zn(1/3)Nb(2/3))O3]-0.1PbTiO3, and Pb(Zr(0.52)Ti(0.48))O3, in the mixed oxide compositions and in an amorphous precursor derived from coprecipitation proceeds via a process involving nucleation and subsequent growth of perovskite crystallites with in teasing 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. (C) 2000 Academic Press.
Source Title: Journal of Solid State Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/107109
ISSN: 00224596
DOI: 10.1006/jssc.2000.8782
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