  The site-doping strategy of barium titanate (BaTiO3) is a promising way to
develop new lead-free materials for energy with enhanced dielectric and
piezoelectric properties. A novel strategy to elaborated pure and crystalline
Ba0.85Ca0.15Zr0.1Ti0.9O3(BCZT) ferroelectric powders at low temperature is
proposed. It is based on sol-gel method followed by a hydrothermal reaction.
The effects of preparation temperature on structure, crystallinity, purity,
morphology and particles size distribution of BCZT powders were studied. It was
clearly shown that pure and crystalline BCZT could be obtained over 80{\deg}C.
Furthermore, the BCZT particles exhibit a spherical shape whose mean size
increases from 145 nm at 40{\deg}C to 160 nm at 80{\deg}C. The present study
may provide a new strategy to design lead-free ferroelectric materials with
enhanced structure and microstructure properties at very low temperature.
