Synthesis and characterization of photochemical sol–gel derived lanthanum doped Bi4Ti3O12 film and its micro-patterns
Tóm tắt
A unique photochemical sol–gel route was employed to prepare La-doped Bi4Ti3O12 film (BLT) using bismuth nitrate, lanthanum nitrate, and titanium tetra-n-butoxide as starting materials. Through complex reaction between benzoyl acetone and Ti4+ ions, the synthesized La-doped Bi4Ti3O12 sol and gel films exhibited photosensitivity. Micro-patterned BLT film was obtained by a photoresist-free micro-patterning technique. The phase microstructures, electrical and ferroelectric properties of the as-prepared BLT film were characterized. By doping Lanthanum, the strong (00l)-oriented BT phase was transformed to randomly-oriented orthorhombic phase, resulting in the enhanced remanent polarization and improved fatigue properties. The obtained BLT film showed good ferroelectric properties with a long fatigue cycles over 1010 cycles.
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