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Lead zirconate titanate
About: Lead zirconate titanate is a research topic. Over the lifetime, 7141 publications have been published within this topic receiving 150878 citations.
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TL;DR: In this paper, a flexible PEG was proposed based on organic-inorganic lead halide perovskite materials and operated by controlling the dielectric constant via the partial substitution of Pb2+ with Fe2+ in MAPbI3.
64 citations
TL;DR: The scaling relation of ferroelectric hysteresis area against frequency f and field amplitude E 0 for the saturated loops of the hard lead zirconate titanate bulk ceramic takes the form of ⟨A⟩∝f−0.28E00.89, while for the minor loops, the scaling relations are similar to those of its soft counterpart as mentioned in this paper.
Abstract: The scaling relation of ferroelectric hysteresis area ⟨A⟩ against frequency f and field amplitude E0 for the saturated loops of the hard lead zirconate titanate bulk ceramic takes the form of ⟨A⟩∝f−0.28E00.89, while that for the minor loops takes the form of ⟨A⟩∝f−0.43E03.19. In both cases, the scaling relations are similar to those of its soft counterpart. This indicates that the dynamic behaviors and scaling relations in bulk ceramics are mainly governed by the domain states and structures, while the distinct types of complex defects contribute mainly to the difference in the coercive field observed in hard and soft ceramics.
64 citations
TL;DR: In this article, a lead-free Li-(K,Na)NbO3 (KNN) piezoceramics with high normalized strain d33* up to 538 pm/V at electric fields as low as 1 kV/mm, comparable to a commercial soft lead zirconate titanate (PZT) sample, is presented.
Abstract: Lead-free Li-(K,Na)NbO3 (KNN) piezoceramics shows surprisingly high normalized strain d33* up to 538 pm/V at electric fields as low as 1 kV/mm, comparable to a commercial soft lead zirconate titanate (PZT) sample. The special treating process of aging and re-poling is essential for this achievement. The extrinsic piezoelectric contribution related to domain wall motion is proposed of primary responsibility for the strain, which endows the sample with a direct piezoelectric coefficient of 324 pC/N. Strain behavior with regard to both electric field level and frequency was investigated to prove the assumption. The present study proves the possibility of preparing PZT-comparable lead-free piezoceramics in simply Li-doped KNN by conventional sintering.
64 citations
TL;DR: In this article, Yttria-doped zirconia, barium titanate (PZT), and lead-zirconate titanate powders were synthesized using hydrothermal procedures.
Abstract: Yttria-doped zirconia, lead zirconate titanate (PZT) and barium titanate were successfully obtained using hydrothermal procedures. Based on these results mathematical models describing the correlation between the nanopowders' characteristics and the main synthesis parameters are proposed. Powders from the systems (Y2O3)0.1 (ZrO2)0.9 and (Y2O3)0.04 (ZrO2)0.96 obtained from soluble Zr(IV) peroxide precursors show that cubic/tetragonal phases have been formed by controlled crystallization from the solution. With increasing temperature and hydrothermal treatment temperature the mean crystallite sizes increase from a minimum of 5 nm to a maximum of 22 nm. The activation energy shows a diffusion-controlled process. Barium titanate powders with controlled stoichiometry could also be hydrothermally synthesized in the temperature range 110– 175°C. Synthesis of PZT powders with controlled stoichiometry and mean crystallite sizes from 4 to 43 nm is finally presented. Dense yttria-partial stabilized zirconia with high ionic conductivity and PZT with a good stability of electric–physical parameters for use in the design of materials with improved sensorial characteristics was obtained after sintering the nanopowders.
64 citations
TL;DR: An analytical model of piezoelectric energy harvester has been developed to determine the output voltage across an electrical circuit when it is forced to undergo a base excitation as mentioned in this paper.
Abstract: Energy harvesting is the process of attaining energy from the external sources and transforming it into usable electrical energy. An analytical model of piezoelectric energy harvester has been developed to determine the output voltage across an electrical circuit when it is forced to undergo a base excitation. This model gives an easy approach to design and investigate the behavior of piezoelectric material. Numerical simulations have been carried out to determine the effect of frequency and loading on a Lead zirconate titanate (PZT-5A) piezoelectric material. It has been observed that the output voltage from the harvester increases when loading increases whereas its resonance frequency decreases. The analytical results were found to be in good agreement with the experimental and numerical simulation results.
64 citations