Abstract
Electrorheological (ER) fluids based on nanorods of calcium and titanium precipitate (CTP) possess good ER performance. We investigate the shear stress and leaking current of CTP suspension from −15 to 230°C, and it is found that the ER effect increases at up to 150°C. Dielectric spectra of the CTP suspension at different temperatures indicate that the change of interface polarization can perfectly interpret the increment of ER effect and leaking current. The Fourier transform infrared (FTIR) spectroscopy test shows that some compositions of the CTP particles decompose at temperature of 180°C, which leads to a consequential decrease of ER effect. Through thermogravimetric and differential thermal analyses (TG-DTA), we find that TiOC2O4(H2O)2 plays a key role in the dielectric property and ER effect of CTP suspension.
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