| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effect of Synthesis Process on the Preparation of Pure Barium Titanate Powder with High Tetragonality by Solid State Reaction |
| LU Yu1,2, ZHOU Bin2,3, HAN Bing1,2, ZHAO Guoxiang2,3, CHEN Xuefeng2,4,*, WANG Genshui4
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1 School of Rare Earths, University of Science and Technology of China, Hefei 230026, China
2 Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, Jiangxi, China
3 School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
4 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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Abstract Barium titanate is an important functional ceramic material, which is widely used in electronic components such as multilayer ceramic capacitors (MLCC) due to its excellent dielectric properties. BaTiO3 powders with uniform morphology and high tetragonality were synthesized by solid state reaction between barium carbonate and titanium dioxide as the raw materials in this study. Then the effects of synthesis process (synthesis temperature, heating rate and holding time) on the BaTiO3 powders were investigated systematically. The products were characterized by thermogravimetric/differential thermal analysis (TG/DTA), X-ray diffraction (XRD) and field emission scanning electron microscopy (SEM). The results showed that the synthesis temperature mainly affected the tetragonality of BaTiO3 powders, the hold time and heating rate mainly affected the particle size and size distribution; the BaTiO3 powders with an average particle size of 400 nm and a tetragonality (c/a) of 1.009 1 were prepared at a synthesis temperature of 1 050 ℃, a heating rate of 5 ℃/min, and a hold time of 3 h. The work provided a good research idea for the preparation of high-reliability pure BaTiO3 powders used for MLCC by solid state reaction.
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Published: 10 April 2024
Online: 2024-04-11
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| Fund:National Natural Science Foundation of China (U2002217, 11774366) and Key Deployment Projects of Chinese Academy of Sciences (ZDRW-CN-2021-3-1). |
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2024, Vol. 38 
