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Ba 0.6 Sr 0.4 TiO 3 – MgO Ceramic Powders with Uniform Microstructures Prepared by Aqueous Gelcasting‐Assisted Solid‐State Method
Author(s) -
Wu JiaMin,
Lei Wen,
Wang XiaoHong,
Xu Min,
Lu WenZhong
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05120.x
Subject(s) - ceramic , materials science , sintering , aqueous solution , chemical engineering , phase (matter) , solid state , nanoparticle , mineralogy , composite material , nanotechnology , chemistry , organic chemistry , engineering
A novel forming method–aqueous gelcasting was used to assist conventional solid‐state method to prepare 45 wt% Ba 0.6 Sr 0.4 TiO 3 –55 wt% MgO ( BSTM ) ceramic powders. For comparison purpose, conventional solid‐state method was also used to synthesize the same powders. It is found that the BSTM ceramic powders prepared by our method are more uniform with smaller and more sphere‐like particles than those prepared by the conventional method, whereas the phase compositions are completely the same no matter what powder preparation method is adopted. In addition, the BSTM green samples and ceramics from powders prepared by our method are more uniform than those from powders prepared by the conventional method. Moreover, it is found that using this novel method to prepare BSTM ceramic powders could not only improve the dielectric properties of the BSTM ceramics, but also decrease their sintering temperature. Aqueous gelcasting–assisted solid‐state method could be a novel promising method to prepare high performance ceramic powders in the future.