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首页> 外文期刊>Journal of Advanced Ceramics >Influence of sintering temperature on electrical properties of (K_(0.4425)Na_(0.52)Li_(0.0375)(Nb_(0.8825)Sb_(0.07)Ta_(0.0175)O3 ceramics without phase transition induced by sintering temperature
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Influence of sintering temperature on electrical properties of (K_(0.4425)Na_(0.52)Li_(0.0375)(Nb_(0.8825)Sb_(0.07)Ta_(0.0175)O3 ceramics without phase transition induced by sintering temperature

机译：烧结温度对（K_（0.4425）Na_（0.52）Li_（0.0375）（Nb_（0.8825）Sb_（0.07）Ta_（0.0175）O3陶瓷电性能的影响

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摘要

Lead-free (K_(0.4425)Na_(0.52)Li_(0.0375)(Nb_(0.8825)Sb_(0.07)Ta_(0.0175)O3 (KNLNST) piezoelectric ceramics are synthesized by the conventional solid-state reaction method. The sintering temperature and poling temperature dependence of ceramic properties are investigated. Previous studies have shown that variation of sintering temperature can cause phase transition, similar to the morphotropic phase boundary (MPB) behavior induced by composition changes in Pb(Zr,Ti)O3 (PZT). And the best piezoelectric performance can be obtained near the phase-transition sintering temperature. In this research, phase transition induced by sintering temperature cannot be detected and excellent piezoelectric properties can still be obtained. The sintering temperature of the largest piezoelectric coefficient of such composition is lower than that of the highest density, which is considered in composition segregation as a result of intensified volatilization of alkali metal oxides. Combined with the effect of poling temperature, the peak values of the piezoelectric properties are d_(33) = 313 pC/N, k_p = 47%, ε~r= 1825, tanδ=0.024, T_(o-t) = 88 °C, and T_c = 274 °C.
机译：采用传统的固相反应法合成了无铅（K_（0.4425）Na_（0.52）Li_（0.0375）（Nb_（0.8825）Sb_（0.07）Ta_（0.0175）O3（KNLNST）压电陶瓷。研究了陶瓷性能与极化温度的关系，先前的研究表明，烧结温度的变化会引起相变，类似于由Pb（Zr，Ti）O3（PZT）的成分变化引起的同相相界（MPB）行为。在相变烧结温度附近可以获得最佳的压电性能，在这项研究中，无法检测到由烧结温度引起的相变，并且仍然可以获得优良的压电性能，这种成分的最大压电系数的烧结温度较低高于最高密度，这被认为是由于碱金属氧化物挥发增加而导致的成分偏析。极化温度的峰值，d_（33）= 313 pC / N，k_p = 47％，ε〜r = 1825，tanδ= 0.024，T_（ot）= 88°C，T_c = 274 ℃。

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