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Local electromethanical properties of the CaCu 3Ti 4O 12 ceramics
(2010-12-01)
Scanning probe microscopy (SPM) was used to probe piezoelectric vibrations and local conductivity in CaCu 3Ti 4O 12 (CCTO) ceramics at room temperature. Piezoelectric contrast was observed on the polished surfaces of CCTO ...
Template-based fluoropolymer ferroelectrets with multiple layers of tubular channels
(2010-12-01)
Significant efforts are devoted to developing new ferroelectrets with well-controlled void distributions or uniform voids and with good long-term and thermal stability of the piezoelectricity. Here, we describe the concept, ...
Electrode poling of cellular polypropylene films with short high-voltage pulses
(2002-01-01)
Recently, piezoelectric cellular polypropylene (PP) was proposed as a new type of quasi-ferroelectric. The observed hysteresis of the charge density as a function of the electric field could be explained as field-dependent ...
Development of a piezoelectric transducer coupling system for structural health monitoring applications
(2019-10-01)
Piezoelectric transducers have been widely used in structural health monitoring (SHM) frameworks. Recently, preliminary applications of these devices have emerged in the field of ultrasonic waves based on transmitter/receiver ...
Characterization of the temperature, load and damage effects using piezoelectric transducer patches based on fuzzy clustering
(2011-12-01)
Structural Health Monitoring (SHM) denotes a system with the ability to detect and interpret adverse changes in a structure. One of the critical challenges for practical implementation of SHM system is the ability to detect ...
Influence of calcium concentration on the structural and electrical properties of PZT ceramic
(2015-01-01)
Lead zirconate titanate, with Zr/Ti ratio of 53/47 was prepared by the polymeric precursor method. The powders were doped with 0, 0.2, 0.4 end 0.6 mol% of Ca2+ and characterized by XRD. The percentages of tetragonal and ...
Thickness dependence of structure and piezoelectric properties at nanoscale of polycrystalline PZT thin films
(2012-10-31)
Lead zirconate titanate Pb(Zr 0.50Ti 0.50)O 3 (PZT) thin films were deposited by a polymeric chemical method on Pt(111)/Ti/SiO2/Si substrates to understand the mechanisms of phase transformations and the effect of film ...
Partial Discharge Detection of Transformer Bushing Based on Acoustic Emission and Current Analysis
(2021-08-05)
Partial discharge (PD) detection is one of the most important parameters which can classify the insulation condition of the distribution and power transformers. Among several components, the transformer bushing is an ...
Non-ideal excitation approach for piezoelectric vibration based energy harvesting
(2014-01-01)
Common solution for energy harvester device is project design according harmonic excitation around natural frequency matching excitation source. Environment vibration is random and wide band causing short time of resonance ...