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Dispersion Behavior of Barium Titanate Nanoparticles Prepared by Using Various Polycarboxylic Dispersants
Author(s) -
Iijima Motoyuki,
Sato Nobuhiro,
Tsukada Mayumi,
Kamiya Hidehiro
Publication year - 2007
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.1551-2916.2007.01787.x
Subject(s) - dispersant , chemical engineering , materials science , polyacrylic acid , crystallinity , nanoparticle , barium titanate , sedimentation , dispersion (optics) , adsorption , polymer , inorganic chemistry , chemistry , organic chemistry , nanotechnology , composite material , ceramic , geology , paleontology , physics , sediment , optics , engineering
The effects of the polycarboxylic dispersant structures on the crystallinity and sedimentation behavior of prepared BaTiO 3 nanoparticles were analyzed using four types of dispersants—ethylenediaminetetraacetic acid dipotassium salt (EDTA), trans ‐aconitic acid (TAA), ammonium acrylate–methyl acrylate co‐polymer (PAA50), and sodium polyacrylate (PAA100). In the case of EDTA and TAA, the adsorbed ratio of the dispersants on BaTiO 3 nanoparticles was relatively low, and only slight improvement of sedimentation behavior was observed. On the other hand, in the case of PAA50 and PAA100, the adsorbed ratio was high, and the sedimentation behavior was gratefully improved. Next, in order to analyze the relationships among the additive amount of polycarboxylic dispersants, crystallinity, and sedimentation behavior, various amounts of PAA100 or PAA50 were treated in the synthesis solution. The sedimentation behavior of BaTiO 3 nanoparticles improved with increasing amounts of PAA100 and PAA50 while their crystal phase became amorphous. Adding PAA50 at a molar ratio of COO − /Ba 2+ =0.266 resulted in BaTiO 3 nanoparticles with the best dispersion stability in an aqueous media.