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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)285-287
Number of pages3
JournalNihon Reoroji Gakkaishi
Volume33
Issue number5
DOIs
Publication statusPublished - 2005 Dec 1

Keywords

  • Barium strontium titanate
  • Electrorheology
  • Shearstress
  • Silicone oil
  • XPS

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Electrorheological response of silicone oil suspension of barium strontium titanate particles with different surface compositions'. Together they form a unique fingerprint.

  • Cite this