title: The importance of the solids loading on confirming the dielectric nanosize dependence of BaTiO₃ powders by slurry method.
abstract: The dielectric nanosize dependence of BaTiO₃ powders was investigated by the slurry method, where two series of BaTiO₃ slurries with 10 vol% and 30 vol% solids loadings were prepared as model samples. Applying the Bruggeman-Hanai equation, the high-frequency limiting permittivity (ε(h)) of the slurries was extracted from the dielectric spectra. The ε(h) of the 10 vol% slurry showed abnormal size independence in the range from 100 nm to 700 nm, and the ε(h) of the 30 vol% slurry exhibited good agreement with the previous prediction. Through analysing quantitatively the response of ε(h) to the changing permittivity of the powders under different solids loading, it was found that the ε h of the slurry with lower solids loading is more inclined to be interfered by the systematic and random errors. Furthermore, a high permittivity value was found in the BaTiO₃ powders with 50 nm particle size.
authors.affiliation: School of Science, Beijing Technology and Business University, Beijing 100048, China. zhouw@th.btbu.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Yi Mei
authors.initials: YM
authors.lastname: Nie
authors.forename: Shu Jing
authors.initials: SJ
authors.lastname: Li
authors.forename: Hai Yan
authors.initials: HY
authors.lastname: Liang
mesh_terms: D017609:Barium Compounds / Q000032:analysis* / Q000138:chemical synthesis*; D017097:Electric Impedance; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011208:Powders; D014025:Titanium / Q000032:analysis*
chemical_list: D017609:Barium Compounds; D011208:Powders; C024547:barium titanate(IV); D014025:Titanium