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Colloid Emulsion of Nanosized Strontium Bismuth Tantalate Powder
Author(s) -
Lu ChungHsin,
Saha Susanta Kumar
Publication year - 2000
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.1151-2916.2000.tb01382.x
Subject(s) - tantalate , calcination , materials science , bismuth , chemical engineering , crystallinity , particle size , colloid , emulsion , mineralogy , phase (matter) , microstructure , strontium , nanoparticle , nanotechnology , metallurgy , composite material , chemistry , ferroelectricity , organic chemistry , dielectric , optoelectronics , engineering , catalysis
A novel colloid‐emulsion process has been used to synthesize nanosized strontium bismuth tantalate (SrBi 2 Ta 2 O 9 ) particles. During calcination, the desired bismuth‐layered structure phase develops at the expense of the pyrochlore phase. Calcining the precursor powder at 750°C for 2 h leads to the complete formation of single‐phase layered‐structured SrBi 2 Ta 2 O 9 . The powder that is formed consists of nanoparticles with a narrow size distribution and almost‐spherical morphology. The crystallinity of the calcined powder increases as the calcination temperature and heating time increases. The developed colloid‐emulsion process significantly reduces the SrBi 2 Ta 2 O 9 particle size, in comparison to conventional process techniques, and results in a uniform microstructure of the obtained powder.