Barium Titanate Nanoparticles (BaTiO3) Application: High-density optical data storage; Phase conjugated mirrors and lasers; Nonlinear optical devices; Pattern recognition; Micro-capacitors; Ferroelectric ceramics; PTC thermistors; On-chip programmable devices; Optical computing; Optical image processing; Piezoelectric devices; Pyroelectric sensors; Semiconductive ceramics; Varistors; Electro-optic devices; Ceramic capacitors; Dielectric amplifiers; Dynamic holography.