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Effect of Supporting Anions on Particle Characteristics of Barium Titanyl Oxalate Formed by Homogeneous Precipitation
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1998, v.11 no.4, pp.260-265
Ryu,
K., Huh,
W., &
Lee,
C.
(1998). Effect of Supporting Anions on Particle Characteristics of Barium Titanyl Oxalate Formed by Homogeneous Precipitation. Analytical Science and Technology, 11(4), 260-265.
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Abstract
Spherical, <TEX>${\mu}m$</TEX>-sized particles of barium titanyl oxalate were prepared by thermal decomposition of dimethyl oxalate in acidic barium and titanium solutions. Precipitation was carried out in the presence of several supporting anions. Spherical particles having a specific type of particle size distribution. i.e., unimodal or bimodal distribution, with mean size in the range of <TEX>$0.2{\sim}3{\mu}m$</TEX>, were formed depending on the supporting anions, oxalate ion generation rate and aging time. Particles of barium titanyl oxalate settled on the bottom of the beaker at the aging time of 120 min grew to the critical monosize of about <TEX>$1.5{\sim}3{\mu}m$</TEX>. XRD spectra and chemical analyses of barium titanate showed that barium titanyl oxalate with high qualities could be synthesized by choosing chloride ion as a supporting anion and increasing the reaction temperatures.
- keywords
- barium titanyl oxalate, morphology, dimethyl oxalate, homogeneous precipitation
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