Preparation of <TEX>$BaTiO_3$</TEX> Fine Powders by Spray Pyrolysis Using Ultrasonic Atomization Technique

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J. Korean Ceram. Soc. > Volume 28(11); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(11): 851.

초음파 분무 열분해법에 의한 $BaTiO_3$ 미분말의 제조

조형진, 이종흔, 박순자

서울대학교 공과대학 무기재료공학과

Preparation of $BaTiO_3$ Fine Powders by Spray Pyrolysis Using Ultrasonic Atomization Technique

ABSTRACT

Spherical fine BaTiO3 powders with an average diameter of 0.3${mu}{textrm}{m}$ to 0.9${mu}{textrm}{m}$ are prepared at 100$0^{circ}C$ by the ultrasonic spray pyrolysis of solutions containing Ba(NO3)2 and TiCl4. Experimental variables are adjusted to produce BaTiO3 powders and its effect on the phase, the size and the morphology of the particles are investigated by XRD, SEM, TEM. Each particle consists of small primary particles and has a hollow around its center. The dependence of particle diameters on the concentrations of source solutions indicates that metal salt precursors are dried to precipitate solid particles and decompose to form BaTiO3 phase without gas phase reactions.