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Structure–Property Correlation and Harvesting Power from Vibrations of Aerospace Vehicles by Nanocrystalline La–Pb(Ni 1/3 Sb 2/3 )–PbZrTiO 3 Ferroelectric Ceramics Synthesized by Mechanical Activation
Author(s) -
Kumar Harishchandra Hansraj,
Lonkar Chandrashekhar Madhav,
Balasubramanian Kanda
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14557
Subject(s) - materials science , microstructure , nanocrystalline material , perovskite (structure) , columbite , crystallinity , ceramic , analytical chemistry (journal) , piezoelectric coefficient , rietveld refinement , high resolution transmission electron microscopy , phase boundary , mineralogy , phase (matter) , composite material , chemical engineering , nanotechnology , crystal structure , crystallography , chemistry , transmission electron microscopy , organic chemistry , chromatography , engineering
Nanostructured Pb 0.98 La 0.02 (Ni 1/3 Sb 2/3 ) 0.05 [(Zr 0.52 Ti 0.48 ) 0.995 ] 0.95 O 3 ferroelectric ceramic has been synthesized for the first time by columbite precursor method followed by mechanical activation ( MA ) from 5 to 40 h of dry oxide powders using high‐energy ball mill, thereby evading the calcination stage. Progressive perovskite phase formation and transformation by MA were investigated from X‐ray diffraction (XRD) analysis, indicating the noticeable presence of perovskite phase after 10 h of milling. Particle morphology of the powder was analyzed by HRTEM and correlated with activation time. Furthermore, the effect of activation time on microstructure and piezoelectric properties of the samples sintered at 1220°C were investigated. Compact microstructure, composition at morphotropic phase boundary, optimum tetragonality, and crystallinity obtained for the sintered samples resulted in best possible piezoelectric charge coefficient, d 33 (449 × 10 −12 C/N), piezoelectric voltage coefficient, g 33 (32 × 10 −3 m.V/N), and figure of merit for power harvesting, FoM PH (14.4 × 10 −12 m‐V.C/N 2 ), for 10 h of activation. The experimental data on output voltage in response to simulated random vibrations of aerospace vehicles measured in frequency band of 20–2000 Hz were also optimum for 10 h activation, which confirm the suitability of this composition for power‐harvesting applications.