B3O2-TiO2-환원제-입자제어제계에서 자전연소합성법에 의한 BaTiO3분말의 제조 및 유전특성 Preparation of BaTiO3 Powder in $BaO2-TiO2-Reduction Agent-PSCA (Particle Size Control Agent) System by SHS and Its Dielectric Properties원문보기
BaO$_2$-TiO$_2$-환원제-입자제어제계에서 자전연소합성법을 이용한 BaTiO$_3$ 분말의 제조에 대하여 고찰하였다. 환원제로서 C, Mg를 사용하였고, 입자제어제로서 NaCl을 사용하였다. 자전연소합성법을 이용한 BaTiO$_3$ 분말의 제조에 있어 최적의 반응계에서 환원제의 종류와 농도, 입자제어제, 반응량의 변화에 따른 생성물의 영향을 조사하였다. 최적의 반응계 및 조성은 Ae반응 분위기에서 BaO$_2$+TiO$_2$+0.1Mg+0.2C+0.75NaCl이었다. 희석제로서 첨가된 NaCl은 연소온도의 조절 뿐 아니라 반응생성물의 입도를 제어하는 효과를 나타냄을 알 수 있었다. 최적의 조건에서 제조된 순수 BaTiO$_3$ 분말의 입도는 약 0.5 $mu extrm{m}$ 이하였으며, 반응량을 증가시킬수록 균일한 반응성을 나타내었다 제조된 BaTiO$_3$ 분말의 유전특성을 측정하기 위하여 130$0^{\circ}C$, 2시간동안 대기중에서 소결실험을 행하였고 이때 상온에서의 유전상수는 약 2290이었고, 큐리점(129$^{\circ}C$)에서의 유전상수는 약 13800을 나타내었다.
BaO$_2$-TiO$_2$-환원제-입자제어제계에서 자전연소합성법을 이용한 BaTiO$_3$ 분말의 제조에 대하여 고찰하였다. 환원제로서 C, Mg를 사용하였고, 입자제어제로서 NaCl을 사용하였다. 자전연소합성법을 이용한 BaTiO$_3$ 분말의 제조에 있어 최적의 반응계에서 환원제의 종류와 농도, 입자제어제, 반응량의 변화에 따른 생성물의 영향을 조사하였다. 최적의 반응계 및 조성은 Ae반응 분위기에서 BaO$_2$+TiO$_2$+0.1Mg+0.2C+0.75NaCl이었다. 희석제로서 첨가된 NaCl은 연소온도의 조절 뿐 아니라 반응생성물의 입도를 제어하는 효과를 나타냄을 알 수 있었다. 최적의 조건에서 제조된 순수 BaTiO$_3$ 분말의 입도는 약 0.5 $mu extrm{m}$ 이하였으며, 반응량을 증가시킬수록 균일한 반응성을 나타내었다 제조된 BaTiO$_3$ 분말의 유전특성을 측정하기 위하여 130$0^{\circ}C$, 2시간동안 대기중에서 소결실험을 행하였고 이때 상온에서의 유전상수는 약 2290이었고, 큐리점(129$^{\circ}C$)에서의 유전상수는 약 13800을 나타내었다.
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 ...
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$^{\circ}C$).
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$^{\circ}C$).
D. H. Yoon and B. I. Lee, ' $BaTiO_3$ Properties and Powder Characteristics for Ceramic Capacitors,' J. Ceram. Proc. Res., 3 [2] 41-7 (2002)
T. Hayashi, H. Shinozaki, and K. Sasaki, 'Preparation and Properties of ${(Ba_0_._7Sr_0_._3)TiO_3}$ Powders and Thin Films Using Precursor Solutions Formed from Alkoxide-Hydroxide,' J. Eur. Ceram. Soc., 19 [6-7] 1011 (1999)
M. Wu, J. Long, G. Wang, A. Huang, and Y. Luo, 'Hydrothermal Synthesis of Tetragonal Barium Titanate from Barium Hydroxide and Titanium Dioxide Under Moderate Conditions,' J. Am. Ceram. Soc., 82 [11] 3254-56 (1999)
J. H. Lee, C. W. Won, T. S. Kim, and H. S. Kim, 'Characteristics of $BaTiO_3$ Powders Synthesized by Hydrothermal Process,' J. Mat. Sci., 35 4271-74 (2000)
P. P. Phule and S. H. Risbud, 'Review: Low-Temperature Synthesis and Processing of Electric Materials in the $BaOTiO_2$ System,' J. Mater. Sci., 25 1169-83 (1990)
P. K. Dutta, R. Asiaie, S. A. Akbar, and W. Zhu, 'Hydrothermal Synthesis and Dielectric Properties of Tetragonal $BaTiO_3$ ,' Chem. Mat., 6 [9] 1542-48 (1994)
K. S. Yun, J. H. Lee, H. Nersisyan, C. W. Won, and H. S. Jung, 'Preparation of $\alpha-Si_3N_4$ Powder in Reaction System Containing Molten Salt by SHS-Part 1. Synthesis of Powder,' J. Kor. Ceram. Soc., 41 [3] 235-41 (2004)
M. H. Ryu, J. H. Lee, C. W. Won, and H. Nersisyan, 'Synthesis and Characteristics of $LiCoO_2$ Powders Prepared by SHS Process,' J. Kor. Ceram. Soc., 41 [5] 388-94 (2004)
I. H. Song, J. Y. Yun, and H. D. Kim, 'Fabrication of Porous $MoSi_2$ Material for Heating Element Through Self-Propagating High-Temperature Synthesis Process,' J. Kor.Ceram. Soc., 41 [1] 62-8 (2004)
A. G. Merzhanov, 'Reviews : Fundamentals, Achievements and Perspectives for Development of Solid-Flame Combustion,' Russ. Chem. Bull., 46 [1] (1997)
A. V. Komarov and I. P. Parkin, 'New Routes in the SelfPropagating High-Temperature Synthesis of Barium Titanium Oxide,' Polyhedron, 15 [8] 1349-53 (1996)
J. H. Lee, H. H. Nersisyan, M. L. Simkins, and C. W. Won, 'Mechanism of Combustion and Phase Formation in the $BaO_2-TiO_2-Oranic$ Compound System,' J. Mater. Res., 18 [8] 1926-33 (2003)
A. A. Shiryaev, 'Macrokinetic Aspects of SHS as Studied by Thermochemical Analysis,' Thermochemistry of SHS from 'Thermo' Program, Russia (1991)
H. H. Nersisyan, J. H. Lee, and C. W. Won, 'Combustion of $TiO_2Mg$ and $TiO_2Mg-C$ Systems in the Presence of NaCl to Synthesize Nanocrystalline Ti and TiC Powders,' Mat. Res. Bull., 38 [7] 1135-46 (2003)
S. K. Ko, 'Preparation and Sintering of Alumina-Titanium Carbide Composite Powder by Self-Propagating High-Tem-perature Synthesis,' Dissertation for Ph.D. Department of Metallurgical Engineering, Chungnam National University (1998)
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