Please use this identifier to cite or link to this item:
|Title:||Ferroelectric lead scandium tantalate from mechanical activation of mixed oxides|
|Citation:||Lim, J., Xue, J.M., Wang, J. (2002-04-28). Ferroelectric lead scandium tantalate from mechanical activation of mixed oxides. Materials Chemistry and Physics 75 (1-3) : 157-160. ScholarBank@NUS Repository. https://doi.org/10.1016/S0254-0584(02)00046-9|
|Abstract:||Conventional mixed oxide preparation of lead scandium tantalate, PbSc0.5Ta0.5O3 (PST) powder, requires two calcinations steps, the first of which is to form a Wolframite precursor and the resulting PST phase is structurally long-range ordered. In this work, we report the synthesis of perovskite PST via a novel one-step mechanical activation route, which leads to a long-range disordered structure as verified by X-ray diffraction. Sintered PSTs from the mechanically activated powders also retain the long-range disordered perovskite structure up to 1250 °C, while > 95% theoretical density was achieved. They exhibit a spontaneous ferroelectric-relaxor transition at 15 °C with a maximum dielectric constant of ∼13,850 and dielectric loss of < 0.04. © 2002 Elsevier Science B.V. All rights reserved.|
|Source Title:||Materials Chemistry and Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 9, 2018
WEB OF SCIENCETM
checked on Jun 27, 2018
checked on Jun 22, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.