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Effect of particle size on the densification and dielectric properties of BaTiO 3 ceramics prepared by liquid phase sintering
Author(s) -
Zou Yanan,
Wu Yugong,
Guo Xiaozan,
Tong Shuai,
Wang Zhiyuan,
Zhang Lu
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127439
Subject(s) - materials science , dielectric , sintering , ceramic , particle size , scanning electron microscope , composite material , grain size , relative density , particle (ecology) , barium titanate , phase (matter) , raman spectroscopy , mineralogy , chemical engineering , optics , engineering , geology , oceanography , chemistry , physics , optoelectronics , organic chemistry
Using starting BaTiO 3 powders of various particle sizes, we investigated the densification and dielectric characteristics of BaTiO 3 ceramics sintered at low temperature with the addition of ZnO‐B 2 O 3 ‐SiO 2 (ZBS) glass as sintering aids. Scanning electron microscopy, X‐ray diffraction, Raman spectroscopy, and LCR meter were used to examine the structure and dielectric properties. The results indicated that the particle size of raw powders had a dramatic influence on the densification and dielectric properties of BaTiO 3 ceramics. The grain size of the final ceramics was almost proportional to the particle size of the starting BaTiO 3 powder. Moreover, the tetragonality ( c / a ratio) and Curie temperature is increased with the increase of grain size of the BaTiO 3 ceramics. The relative density of 96% and the dielectric constant of 1440 were obtained for the BaTiO 3 ceramics prepared with the raw powders of average particle size of 800 nm. In addition, the sintering temperature was reduced to 1100 °C due to the addition of 5 wt% ZBS glass.