Abstract
Particle growth of BT-oxalate was investigated in aging with various additives such as glycerine, chloro-form and NaCl. Their effects on size and morphlogy of particle was examined. It can be known that particle size distributions of BT-oxalate precipitate varied with amounts of these additivies. With small amounts of these additives, particle growth of nonuniform distribution was occurred, but above 1 mole percent of those additives, uniform size distributions of about 0.4 ${\mu}{\textrm}{m}$ could be obtain. There was little difference among the effects by the kinds of additives. From the decomposition of uniform BT-oxalate, BaTiO3 powders of about 0.3${\mu}{\textrm}{m}$ could be obtained.
시효시 시효용액내의 첨가물의 종류에 따른 입자의 성장 거동을 관찰하였다. 첨가제로 glycerine, chloroform 및 NaCl을 첨가형 BT-oxalate 침전물의 크기와 형상에 미치는 영향을 관찰하고자 하였다. BT-oxalate 침전물은 시효시 첨가되는 불순물에 의해 입도 분포의 변화의 변화가 나타남을 확인할 수 있었다. 유기물인 glycerine, chloroform 및 금속염인 NaCl 첨가시에 첨가량이 적을 때는 불균일한 분포를 가진 입자 성장이 일어나지만 첨가량이 1mol% 이상으로 많아지면 0.4$\mu\textrm{m}$정도의 균일한 형상과 크기의 침전물이 얻어진다.
