Relaxor ferroelectric and photocatalytic properties of BaBi4Ti4O15
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چکیده
منابع مشابه
Structural, optical and dielectric properties of relaxor- ferroelectric Pb0.78Ba0.22Sc0.5Ta0.5O3 Running head: Properties of relaxor-ferroelectric Pb0.78Ba0.22Sc0.5Ta0.5O3
We report on the synthesis of a new relaxor compound with chemical formula Pb0.78Ba0.22Sc0.5Ta0.5O3 (PBST). Single crystals were obtained by the high-temperature solution growth method. The structure of the new compound is of double-perovskite type with face-centred cubic symmetry at room temperature. The frequency dependence of the dielectric constant of PBST shows a strong dielectric dispersi...
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In this article, we report the evolution of the dielectric behavior from a dielectric relaxor to a ferroelectric relaxor with variation of Bi concentration in (Sr121.5xBix)TiO3 (0<x<0.2). In the doping range 0.0005<x<0.002, two dielectric modes A and B are induced. The temperature (Tm) where the permittivity maximum occurs for modes A and B is independent of Bi concentration and of dc electric ...
متن کاملBi:SrTiO3: A quantum ferroelectric and a relaxor
Quantum ferroelectric and ferroelectric relaxor behavior has been found in (Sr121.5xBix)TiO3. For x <0.0267, the quantum ferroelectric relationship T«m}(x2xc) 1/2 holds with xc'0.0005, and obvious hysteresis loops were observed. The polarization relaxation shows critical slowing down. At high Bi concentration, a crossover from quantum ferroelectric to relaxor behavior occurred. The coexistence ...
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We review results obtained from recent neutron scattering studies of the lead-oxide class of perovskite relaxors PMN and PZN. A ferroelectric soft mode has been identified in PMN at 1100 K that becomes overdamped near 620 K. This is the same temperature at which polar nanoregions (PNR) begin to form, denoted by Td , and suggests that a direct connection exists between the soft mode and the PNR....
متن کاملRelaxor-ferroelectric PMN–PT Thick Films
Electroceramic thick films are 2D (planar) structures that, in their simplest form, consist of a substrate, a bottom electrode, a ceramic film and a top electrode, with the thickness of an individual layer being typically between 1 and 100 μm. The processing of thick films is similar to the processing of bulk ceramics, i.e., it involves powder synthesis, shaping and sintering. The major differe...
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ژورنال
عنوان ژورنال: Advances in Applied Ceramics
سال: 2019
ISSN: 1743-6753,1743-6761
DOI: 10.1080/17436753.2019.1634943