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Investigating Correlation of Surfactants on Hydrothermal Synthesized
Batrium Titanate Nanocubes
Lee Chiau Peng
Supervisor: Dr. Lee Oon Jew
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
Barium titanate, BaTiO3 is the perovskite oxides with ferroelectric and dielectric
properties that can be utilised in multilayer ceramic capacitors (MLCC). Owing to
device miniaturization, nano-sized barium titanate is crucial for integrating into the
electronics industry while still preserving its high dielectric properties. In this research,
barium titanate was synthesised through hydrothermal process at 230°C for 48 hours
with the presence of barium hydroxide, bis (ammonium lactate) titanium dihydroxide,
oleic acid and varying the concentration of tert-butylamine. The samples show
intermediate phase during hydrothermal synthesis but exhibit single phase of BaTiO3
with high crystallinity after calcination at 900°C for 6 hours. Scanning electron
micrograph demonstrates that BaTiO3 are in cubic shape with sharp edges with the
help of capping agents namely oleic acid and tert-butylamine. The remaining of Ba-O
and Ti-O functional groups indicate that the organic functional groups decompose at
high temperature. The dielectric constant of approximately 579.15 is achieved in
BaTiO3 measured at 1k Hz.
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