Korea-Australia Rheology Journal, Vol.29, No.1, 29-36, February, 2017
New multifunction materials with both electrorheological performance and luminescence property
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Novel multifunctional materials, the composites AlOOH-NaYFTb5 and AlOOH-NaYFTb10, containing AlO(OH) and β-NaYF4:5%Tb3+, have been synthesized via a facile hydrothermal route and a simple grinding method. The boehmite [AlO(OH)], yttrium nitrate [Y(NO3)3·6H2O], terbium nitrate, [Tb(NO3)3·6H2O], sodium citrate (Na3C6H5O7·2H2O) and sodium fluoride (NaF) were used as starting materials. The composition, electrorheological (ER) performance, and luminescence property of the functional materials were studied. Our results show that the composites not only have good electrorheological (ER) performance, but also have good optics property. The relative shear stress τr (τr = τE/τ0, τE and τ0 are the shear stresses at the electric field strength E = 4 and 0 kV/mm, respectively) values of the suspension (25 wt.%) of AlOOHNaYFTb5 material in silicone oil are all larger than 50 in a shear rate ranging from 0.06 to 26 s-1, the τr value reaches 1333 at a shear rate of 0.06 s-1. The material with such high ER activity and favorable luminescence performance is advantageous in its application as a multifunctional material.
Keywords:composite;electrorheological property;luminescence property;multifunctional materials;rare earth compound
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