Effects of Preheating on the Dielectric Properties of Hydrothermal BaTiO3

Abstract

Abstract: Hydrotermal BaTiO₃ powders could be sintered at 1240℃, but the sintered exhibited high porosity and unsatisfying dielectric property due to the existance of a certain amount of surface absorbed water, lattice water and OH- etc. defects. Water and OH^- etc. defects could be removed by heating the as-prepared powders at 900℃ for 2 hours, diffractional scanning calorimetry analysis indicated that the tetragonality of the powders increased from 15% to 28%, th porosity of the sintered body was lowered,and the dielectric properties were improved.

Key words: hydrothermal BaTiO₃, preheating, sintering properties, dielectric properties

XIA Changtai,SHI Erwei,YAO Yao,ZHAO Meiyu,ZHONG Weizhuo,GUO Jingkun. Effects of Preheating on the Dielectric Properties of Hydrothermal BaTiO₃[J]. Journal of Inorganic Materials.

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Effects of Preheating on the Dielectric Properties of Hydrothermal BaTiO₃

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