Abstract
The crystal structure, ferroelectric and piezoelectric properties of pyrochlore-free lead zinc niobate-lead zirconate titanate ceramics were investigated systematically as a function of Sr doping as well as thermal treatment. The results showed that the remanent polarization (P r ) has decreased significantly with increase in strontium content. After annealing, the value of squareness of hysteresis loop (R sq ) increased from 1.48 to 1.74 for the annealed sample. Furthermore the annealed samples exhibited larger P r and lower coercive fields (E c ) compared with as-sintered samples. The results indicated that the ferroelectric and piezoelectric properties in Sr-modified PZT-PZN were further improved by thermal annealing.
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