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J. Korean Ceram. Soc. > Volume 41(11); 2004 > Article
Journal of the Korean Ceramic Society 2004;41(11): 842.
doi: https://doi.org/10.4191/kcers.2004.41.11.842
B3O2-TiO2-환원제-입자제어제계에서 자전연소합성법에 의한 BaTiO3분말의 제조 및 유전특성
윤기석, 임성재, Hayk Nersisyan1, 원창환
Preparation of BaTiO3 Powder in $BaO2-TiO2-Reduction Agent-PSCA (Particle Size Control Agent) System by SHS and Its Dielectric Properties
Ki-Seok Yun, Sung-Jae Lim, Hayk Nersisyan1, Chang-Whan Won
충남대학교 급속응고센터
1Rapidly Solidified Materials Research Center, Chungnam National University
We have investigated on the preparation of BaTiO$_3$ powder at the system of BaO$_2$-TiO$_2$-Reduction ag.-PSCA by SHS. C and Mg were used as reduction agent, and NaCl was used as PSCA (Particle Size Control Agent). The effects of the various reduction agent and its concentration, particle size control agent, reaction mixture mass on the product in the preparation of BaTiO$_3$ powder at the optimum system by SHS were investigated. The optimum conditions for reaction system and composition were BaO$_2$+TiO$_2$+0.11 Mg +0.2C+0.75NaCl in the As atmosphere. NaCl as PSCA showed the effect of controlling the particle size of product as well as the combustion temperature. The particle size of BaTiO$_3$ synthesized at the optimum condition was about 0.5 ${mu}{textrm}{m}$. And as the mixture mass for the reaction was increased, the more stable combustion wave appeared. We have conducted the sintering experiment at the temperature of 130$0^{circ}C$, the time of 2 h and the atmosphere of air to measure the dielectric properties of BaTiO$_3$ synthesised in this work, and the sample sintered in this condition showed 2,290 of dielectric constant at 10$0^{circ}C$ and 13,890 at curie point (129$^{circ}C$).
Key words: $BaO_2$, $TiO_2$, Reduction agent, PSCA, Dielectric constant
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