EFFECT OF MILLING TIME ON PHASE TRANSITION IN BaTi_0.095W_0.05O₃ NANOCERAMICS SYNTHESIZED BY HIGH-ENERGY BALL MILLING

摘要

Nanocrystalline BaTi_(0.095)W_(0.05)O_(3) has been synthesized by mechanical activation process using high-energy ball milling. The powders milled for (10 hours, 20 hours, 30 hours respectively) were characterized by X-ray diffraction (XRD) and Scanning electron microscopy (SEM). Transmission electron microscopy images showed that in W- substituted barium titanate nanoparticles are formed in the range of 20–50 nm. Crystallite size decreases with increasing milling time in the samples. Detailed Dielectric and ferroelectric properties with different milling times are discussed in detail. Diffusivity of the samples increases with milling time. Piezoelectric properties increase with increase in milling time in the samples.