Electrospun lanthanum-doped barium titanate ceramic fibers with excellent dielectric performance

Abstract As the pillar material of the electronic ceramic industry, BaTiO3 (BTO) has superior dielectric and piezoelectric properties. In this present work, pure phase BTO and lanthanum-doped Ba(1–x)LaxTiO3 (BLxT) fibers (x=0.003, 0.006, 0.009 and 0.012) were prepared by electrospinning method with polyacetylacetonatotitanate (PAT). All the fibers after heat-treatment were tetragonal phase with good crystallinity; additionally, the tetragonal phase BTO ceramics have better dielectric properties than the cubic ones. BTO fiber (BTOF) and powder (BTOP) were pressed and sintered into ceramic sheets with BTOF having better formability. Compared with BTOP ceramics, BTOF ceramics had obvious micro-capacitance effect, so they had higher dielectric constants at low frequencies (f