Electrorheological response of silicone oil suspension of barium strontium titanate particles with different surface compositions

Yoshio Kobayashi, Ryusuke Morimoto, Koji Moriyama, Tomoaki Satoh, Mikio Konno

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Electrorheological response of barium strontium titanate (BST)/silicone oil suspension was experimentally studied with measurements of generated shear stress in a range of field frequency (200-4000 Hz) under steady shear. The BST particles were synthesized by the hydrolysis of complex alkoxide precursor that was prepared in a reflux of metallic barium, metallic and tetraethylorthotitanate in solvent. The hydrolysis was performed by the addition of water/ethanol solution to the precursor solution. Generated shear stress of as-prepared (unannealed) BST particles system decreased with an increase in frequency, while that for 1100°C-annealed BST system increased with frequency. XPS measurements revealed that alkoxyl groups that were derived from unreacted alkoxide were on surface of the asprepared BST particles, and the annealing at 1100°C decomposed the alkoxyl groups to hydroxyl groups. Difference in electric conductivities of the surfaces is considered to be responsible for the different shear stress behaviors of the asprepared and annealed particles.

本文言語English
ページ(範囲)285-287
ページ数3
ジャーナルNihon Reoroji Gakkaishi
33
5
DOI
出版ステータスPublished - 2005

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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