Effects of ZnO on the dielectric, conductive and piezoelectric properties of low-temperature-sintered PMnN-PZT based hard piezoelectric ceramics

The ZnO-doped Pb 0.98Ca 0.01Sr 0.01[(Mn 1/3Nb 2/3) 0.06–(Zr 0.52Ti 0.48) 0.94]O 3 + 0.15 wt.% CuO for varying amounts of ZnO ( x wt.%) ceramics were prepared. Their structure evolutions and electrical properties were systematically investigated. A dc and ac conductivity analysis was conducted. It de...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2011-10, Vol.31 (11), p.2013-2022
Main Authors: Tsai, Cheng-Che, Chu, Sheng-Yuan, Hong, Cheng-Shong, Chen, Shih-Fang
Format: Article
Language:English
Subjects:
Activation energy
CERAMICS
COPPER OXIDE
Dielectric relaxation
Diffusive exponent
Direct current
ELECTRICAL CONDUCTIVITY
ELECTRICAL PROPERTIES
INSULATION (ELECTRICAL)
Perovskite structure
Piezoelectric activity
PIEZOELECTRIC EFFECT
Piezoelectricity
Resistivity
SINTERING
ZINC OXIDE
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Summary:The ZnO-doped Pb 0.98Ca 0.01Sr 0.01[(Mn 1/3Nb 2/3) 0.06–(Zr 0.52Ti 0.48) 0.94]O 3 + 0.15 wt.% CuO for varying amounts of ZnO ( x wt.%) ceramics were prepared. Their structure evolutions and electrical properties were systematically investigated. A dc and ac conductivity analysis was conducted. It demonstrated that the probability of ZnO dopants entered the A and/or B-site of the perovskite structure, which affected the dielectric relaxation, activation energy, and piezoelectric properties. Experimental results showed that the tetragonality of the perovskite structure and electro-mechanical energy transformation ratio ( k 2 value) were increased with increasing the ZnO contents for 0.1 ≦ x ≦ 0.5. As ZnO contents increased for 0.1 ≦ x ≦ 2, the diffused phase transition (DPT) characteristic was gradually disappeared. And, the ac activation energy calculated was also decreased due to the conduction mechanism. In addition, the frequency dependence of the ac conductivity was complied with the Jonscher power law, for x = 0.5, 1, and 1.5 at measured temperature.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2011.04.022