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Exploration into Synthesis of Tetragonal Phase BaTiO3 Based on Isopropanol Solvothermal Process and Its Mechanism
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Huiyan GAI1, 2, Chaohua DAI2, Lin YANG2
Mining and Metallurgical Engineering | 2024, 44(2) : 178 - 182
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Mining and Metallurgical Engineering | 2024, 44(2): 178-182
• MATERIALS •
Exploration into Synthesis of Tetragonal Phase BaTiO3 Based on Isopropanol Solvothermal Process and Its Mechanism
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Huiyan GAI1, 2, Chaohua DAI2, Lin YANG2
Affiliations
  • 1.Changsha Research Institute of Mining and Metallurgy Co Ltd, Changsha 410012, Hunan, China
  • 2.Testing Technology Company of Changsha Research Institute of Mining and Metallurgy Co Ltd, Changsha 410012, Hunan, China
Published: 2024-04-01 doi: 10.3969/j.issn.0253-6099.2024.02.038
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With Ba (OH)2·8H2O and Ti (OC4H9)4 as raw materials, and isopropanol (IPA) as solvent, tetragonal-rich BaTiO3(BTO) nanopowder was synthesized by adopting solvothermal process. Effects of Ba/Ti ratio, pH value, solvothermal temperature and time on synthesis of tetragonal-rich BTO powders were investigated, and the mechanism of IPA in the solvothermal process for synthesis of BTO powders was also characterized by X-ray diffraction and scanning electron microscopy. It is found that in the solvothermal process, IPA will preferentially provide certain—OH to promote the hydrolysis of Ti (OC4H9)4, generating TiO6 octahedra to interconnect with Ba2+, which is gradually transformed into the tetragonal phase BaTiO3 with regular morphology after phase transition, dissolution of small particles, and recrystallization in a low alkalinity environment. Experimental results show that under the following conditions including Ba/Ti ratio of 1.6, pH of 10 for the system, a solvothermal process at 220 ℃ for 24 h, calcination at 950 ℃ for 2 h, the synthesized tetragonal-rich BTO nanopowder is well dispersed with regular morphology, square or nearly square shape, with c/a value of 1.009 4 and particle size of 124 nm on average.

barium titanate  /  tetragonal phase  /  isopropanol (IPA)  /  solvothermal process  /  ceramic capacitors  /  perovskite materials  /  synthesis
Huiyan GAI, Chaohua DAI, Lin YANG. Exploration into Synthesis of Tetragonal Phase BaTiO3 Based on Isopropanol Solvothermal Process and Its Mechanism[J]. Mining and Metallurgical Engineering, 2024 , 44 (2) : 178 -182 . DOI: 10.3969/j.issn.0253-6099.2024.02.038
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doi: 10.3969/j.issn.0253-6099.2024.02.038
  • Receive Date：2023-10-26
  • Online Date：2026-03-19
  • Published：2024-04-01
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  • Received：2023-10-26
Affiliations
    1.Changsha Research Institute of Mining and Metallurgy Co Ltd, Changsha 410012, Hunan, China
    2.Testing Technology Company of Changsha Research Institute of Mining and Metallurgy Co Ltd, Changsha 410012, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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