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Fig. 4. (a) Dielectric constant values for KNN-BiT, KNNLT-BiT and KNNLST-BiT mea sured at 1 kHz and at room temperature. (b) Dielectric loss (tan 5) values measurec at 1 kHz.

Figure 4 (a) Dielectric constant values for KNN-BiT, KNNLT-BiT and KNNLST-BiT mea sured at 1 kHz and at room temperature. (b) Dielectric loss (tan 5) values measurec at 1 kHz.

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Fig. 1. Bulk density values for (Kos Nags )NbO3, (Ko.48 Nao,48 Lio,o4 )(Nbo.9Tao.1 )O3 and (Ko.48 Nao.4g Lig.o4 )(Nbo.s6Ta0.1 Sbo.04 )O3 ceramics modified with Bi2Ti207.
Fig. 1. Bulk density values for (Kos Nags )NbO3, (Ko.48 Nao,48 Lio,o4 )(Nbo.9Tao.1 )O3 and (Ko.48 Nao.4g Lig.o4 )(Nbo.s6Ta0.1 Sbo.04 )O3 ceramics modified with Bi2Ti207.
Fig. 2. X-ray diffraction patterns for (a) (Kos5Nao5)NbO3-BiT, (b) (Ko.4sNao.4sLio,o4 )( Nbo.9Tao.1 )O3-BiT and (c) (Ko.4sNao.4sLio.o4 )(Nbo.g6Tao.1 Sbo.04 )O3- BiT ceramics.
Fig. 2. X-ray diffraction patterns for (a) (Kos5Nao5)NbO3-BiT, (b) (Ko.4sNao.4sLio,o4 )( Nbo.9Tao.1 )O3-BiT and (c) (Ko.4sNao.4sLio.o4 )(Nbo.g6Tao.1 Sbo.04 )O3- BiT ceramics.
Fig. 3. SEM image of the polished surface of (a) KNN-0 mol% BiT sintered at 1080°C. (b) KNN-0.5 mol% BiT sintered at 1090°C (c) KNNLT-0 mol% BiT sintered at 1100°C (d KNNLT-0.5 mol% BiT sintered at 1130°C (e) KNNLST-0 mol BiT sintered at 1080°C (f) KNNLST-0.5 mol% BiT sintered at 1090°C.
Fig. 3. SEM image of the polished surface of (a) KNN-0 mol% BiT sintered at 1080°C. (b) KNN-0.5 mol% BiT sintered at 1090°C (c) KNNLT-0 mol% BiT sintered at 1100°C (d KNNLT-0.5 mol% BiT sintered at 1130°C (e) KNNLST-0 mol BiT sintered at 1080°C (f) KNNLST-0.5 mol% BiT sintered at 1090°C.
Fig. 5. Resistivity values for KNN-BiT, KNNLT-BiT and KNNLST-BiT compositions measured at room temperature.
Fig. 5. Resistivity values for KNN-BiT, KNNLT-BiT and KNNLST-BiT compositions measured at room temperature.
Fig. 6. Polarization hysteresis curves for (a) KNN-BiT ceramics, (b) KNNLT-BiT ceramics (c) KNNLST-BiT ceramics.
Fig. 6. Polarization hysteresis curves for (a) KNN-BiT ceramics, (b) KNNLT-BiT ceramics (c) KNNLST-BiT ceramics.
Fig. 7. (a) Representative unipolar strain hysteresis curves for KNN, KNNLT and KNNLST compositions modified with BiT and (b) high signal piezoelectric charge coefficient (d*33) values as a function of the amount of BiT for KNN, KNNLT and KNNLST ceramics.
Fig. 7. (a) Representative unipolar strain hysteresis curves for KNN, KNNLT and KNNLST compositions modified with BiT and (b) high signal piezoelectric charge coefficient (d*33) values as a function of the amount of BiT for KNN, KNNLT and KNNLST ceramics.
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Materials ScienceBismuth Titanate
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