نتایج جستجو برای: pbtio3
تعداد نتایج: 687 فیلتر نتایج به سال:
Using DFT calculations, we investigate the local structure and the distortion patterns of the perovskite AgNbO3 to examine the feasibility of using silver on the perovskite A-site in lead-free piezoelectrics. Our calculations show that in a 5-atom AgNbO 3 unit cell, silver atoms can off-center by about 0.5 A, forming short covalent bonds similar to the short Pb-O bonds in Pb-based ferrroelectri...
By subjecting amorphous flower-like TiO2 to a facile hydrothermal synthesis in the presence of Sr(2+), garden-like perovskite SrTiO3 superstructures were achieved. The amorphous TiO2 was preformed using ZnO flowers as templates. Different three-dimensional SrTiO3 architectures were coexisted in the garden, including SrTiO3 flowers composed of several hollow sword-shaped petals, many sheet-shape...
We have undertaken an inelastic neutron scattering study of the perovskite relaxor ferroelectric Pb(Zn(1/3)Nb(2/3))O3 with 8% PbTiO3 (PZN-8%PT) in order to elucidate the origin of the previously reported unusual kink on the low frequency transverse phonon dispersion curve (known as the "waterfall effect"). We show that its position (q(wf)) depends on the choice of the Brillouin zone and that th...
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