Lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 piezoelectric ceramics processed below 1300 °C
作者： Armando Reyes-Montero , Lorena Pardo , Rigoberto López-Juárez , Amador M González , MP Cruz
DOI: 10.1016/J.JALLCOM.2013.08.165
关键词:
摘要: Abstract Ba0.9Ca0.1Ti0.9Zr0.1O3 (BCTZ) lead-free piezoelectric ceramics were successfully prepared by Pechini polymeric precursor method using low thermal treatments. XRD analysis shows single-phase perovskite type structure for powders synthesized at 700 °C 1 h. Dense obtained from these reactive precursors sintering temperatures below 1300 °C (1200 °C, 1250 °C and 1275 °C 5 h). The sintered 5 h exhibited the best ferro–piezoelectric properties: d33 = 390 pC/N, d31 = −143 pC/N, kp = 50% , e 33 T = 2253 tan δ = 0.06 (100 kHz) room temperature, TC = 112 °C, 2Pr = 24 μC/cm2 2EC = 4.07 kV/cm. (97% theoretical density) have average grain size ≈5 μm, TC = 115 °C high performance (d33 = 340 pC/N, kp = 49%). sensitivity is due to polarizability of local level.
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