High Power Resonance Characteristics and Dielectric Properties of Co-substituted 0.92Pb(Zn1/3Nb2/3)O3–0.08PbTiO3 Single Crystal
High Power Resonance Characteristics and Dielectric Properties of Co-substituted 0.92Pb(Zn1/3Nb2/3)O3–0.08PbTiO3 Single Crystal
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DOI：
10.1143/jjap.42.531
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发表时间：
2003-02
影响因子：
1.5
通讯作者：
S. Priya;K. Uchino
中科院分区：
文献类型：
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作者：
S. Priya;K. Uchino
采用改进助熔剂法制备了共掺杂0.92Pb(Zn1/3Nb2/3) O3-0.08PbTiO3 （PZNT）晶体。研究了取向晶体的介电和压电性能。在高功率谐振驱动下，PZNT晶体的机械品质因子（Qm）和振动速度都比未改性的PZNT晶体有较大的提高。在30 kv /cm的电场水平下，应变水平为~ 0.3%，获得了无滞后的单极应变-电场响应。共掺杂导致了菱形向四方相转变所需的电场水平的增加。共改性晶体的居里温度为~ 130℃。研究结果表明，Co在PZNT晶体中起硬化作用。
Crystals of Co-doped 0.92Pb(Zn1/3Nb2/3)O3–0.08PbTiO3 (PZNT) were grown by modified flux technique. The dielectric and piezoelectric properties were investigated for oriented crystals. Under high power resonant drive, the mechanical quality factor (Qm) and vibration velocity showed a considerable improvement, compared to the unmodified PZNT crystals. Unhysteretic unipolar strain–electric field response was obtained for field levels of 30-kV/cm with strain level of ∼0.3%. Co-doping resulted in the increment of electric field level required for rhombohedral to tetragonal phase transition. The curie temperature of Co-modified crystals was ∼130°C. The results obtained in this study indicate that Co imparts hardening effect in the PZNT crystal.