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Fig. 2. Dielectric constant K’ as a function of Curie temperature various for hard piezoelectric materials.

Figure 2 Dielectric constant K’ as a function of Curie temperature various for hard piezoelectric materials.

Related Figures (8)

Piezoelectric and dielectric properties for selected hard PZT, PMNT ceramics and single crystals Table 1
Piezoelectric and dielectric properties for selected hard PZT, PMNT ceramics and single crystals Table 1
Fig. 1. Mechanical quality factor Q as a function of Curie temperature various for hard piezoelectric materials.
Fig. 1. Mechanical quality factor Q as a function of Curie temperature various for hard piezoelectric materials.
Fig. 3. Electromechanical coupling factor 43; as a function of Curie temperature various for hard piezoelectric materials.
Fig. 3. Electromechanical coupling factor 43; as a function of Curie temperature various for hard piezoelectric materials.
Fig. 4. Piezoelectric coefficient d33 as a function of Curie temperature various for hard piezoelectric materials. Fig. 6 summarizes the figure of merit of commercial hard PZT materials, single crystals, modified PMNT and PLZT materials, manganese modified PSNT materials as a function of Curie temperature. It was found that the modified PZNT12 single crystals possess high value about ~2.5 x 10°, but low Curie temperature at 180 °C. Most of the modified hard PZT materials exhibit figure of merit range from | x 10° to 2.5 x 10°, with the exception of PZ54,
Fig. 4. Piezoelectric coefficient d33 as a function of Curie temperature various for hard piezoelectric materials. Fig. 6 summarizes the figure of merit of commercial hard PZT materials, single crystals, modified PMNT and PLZT materials, manganese modified PSNT materials as a function of Curie temperature. It was found that the modified PZNT12 single crystals possess high value about ~2.5 x 10°, but low Curie temperature at 180 °C. Most of the modified hard PZT materials exhibit figure of merit range from | x 10° to 2.5 x 10°, with the exception of PZ54,
Piezoelectric properties for PSNT and manganese modified PSNT ceramics Table 2
Piezoelectric properties for PSNT and manganese modified PSNT ceramics Table 2
Fig. 6. Figure of merit as a function of Curie temperature various for piezoelectric materials. From all the trends presented above (po only), it was deemed that a compromise in while maintaining a relatively high Tc could ycrystalline Q, kK", Ki, be achieved within the relaxor-PT perovskite system PSNT, whose MPB composition was found to be at 43% PT with a Curie temperature around 270 °C. As listed in Tab materials with compositions close to the studied, in which the Curie temperature was e 2, PSNT MPB were found to be
Fig. 6. Figure of merit as a function of Curie temperature various for piezoelectric materials. From all the trends presented above (po only), it was deemed that a compromise in while maintaining a relatively high Tc could ycrystalline Q, kK", Ki, be achieved within the relaxor-PT perovskite system PSNT, whose MPB composition was found to be at 43% PT with a Curie temperature around 270 °C. As listed in Tab materials with compositions close to the studied, in which the Curie temperature was e 2, PSNT MPB were found to be
Fig. 5. Mechanical quality factor as a function of dielectric constant various for piezoelectric materials.
Fig. 5. Mechanical quality factor as a function of dielectric constant various for piezoelectric materials.
263 °C for PSNT41, increasing to 276 °C for PSNT44 ceramics. The highest dielectric constant was found to be 3500 for PSNT43.5, while the highest piezoelectric coefficient was found to be 660 pC/N for the PSNT43 material. The largest electromechanical coupling factor k33 was found to be 80% for PSNT41 and PSNT42 ceramics.
263 °C for PSNT41, increasing to 276 °C for PSNT44 ceramics. The highest dielectric constant was found to be 3500 for PSNT43.5, while the highest piezoelectric coefficient was found to be 660 pC/N for the PSNT43 material. The largest electromechanical coupling factor k33 was found to be 80% for PSNT41 and PSNT42 ceramics.
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EngineeringUltra SoundCurie temperatureMorphotropic Phase BoundaryHigh Intensity Focused Ultrasound
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