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PLZTLead-Lanthanum-Zirconate-Titanate (electro-optic ceramic material)
PLZTPolarized Lead Zirconium Titanate
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The sintered PLZT samples were polished to prepare electrodes, in which a silver ink was applied to increase the electrical conductivity on the electrodes.
Once the PLZT electrodes were manufacture by mechanical milling processing, the physical, mechanical, and electrical properties were then evaluated as follows: density and open porosity were determined using Archimedes principle.
The experimental setup used to get the patient's cardiac pulses was as follows: he was placed in a horizontal position and, for recording the electrical activity of his heart, the electrocardiographic (ECG) electrodes were placed on the lead I and the PLZT sensor was placed on the index finger of the patients' left arm, as shown in Figure 4, to measure the blood flow that results from the pulsations of blood occurring with each heartbeat.
PLZT sensor was then placed on the index finger using a finger splint and it recorded the mechanical heart pulses in a piezoelectric manner.
Electrocardiographic signals were obtained using lead I configuration and an instrumentation amplifier (Bio-Amp 100); a PLZT sensor and low current amplifier were used to get pulse signal from the index finger.
The SEM characterization indicated that hydroxylated PLZT nanoparticles have better dispersion and compatibility with PVDF matrix than crude PLZT, indicating stronger interaction between hydroxylated PLZT and PVDF than crude one.
This experimental procedure was the most suitable to address the vergence contribution to fusion because no direct monitoring of vergence angle could be implemented in conjunction with the sequential transmission of light through the PLZT optics.
The resulting PLZT ceramic was used as pyroelectric sensor in the TWRC experimental setup in order to obtain the thermal diffusivity of well-know liquids as distilled water, olive oil, glycerol, and ethylene glycol.
This setup consisted of a chamber of variable length containing the liquid sample (b); cavity is formed by a circular Cu foil 100 [micro]m thick (a) and PLZT pyroelectric temperature sensor (c).
In the present study, the thermal diffusivities of different liquid samples were obtained by using the TWRC with two different PE sensors (PLZT and PVDF) in order to compare their performance.
Figures 4 and 5 show the PPE signal amplitude and phase, respectively, as a function of the relative cavity length, by using now a PLZT ceramic as the PE detector also for distilled water; the solid line in Figures 4 and 5 represents the best fit of the amplitude and phase of (2) to the experimental PPE signal amplitude and phase data, respectively.
As it can be seen, from Figures 2 and 4, the range of the cavity length in which the theoretical model (amplitude of (2)) fits with the experimental amplitude data, is increased at least 400 [micro]m when PLZT detector is used instead of PVDF.