Kim Jinhwan, Koh Jung-Hyuk
J Nanosci Nanotechnol. 2015 Mar;15(3):2360-3. doi: 10.1166/jnn.2015.10268.
Self-powered energy harvesting technologies have been intensively investigated by employ- ing Pb-free piezoelectric materials. One such Pb-free piezoelectric material, the ceramic 0.97(Na0.5K0.5)NbO3-0.03(Bi0.5Na0.5)TiO3, was prepared by employing the conventional mixed oxide method. 0.97(Na0.5K0.5)NbO3-0.03(Bi0.5Na0.5)TiO3 ceramics were prepared and the effect of sintering temperature on the microstructure, piezoelectric and ferroelectric properties were system- atically investigated for energy harvesting applications. The crystal structure of 0.97(Na0.5K0.5)NbO3- 0.03(Bi0.5Na0.5) TiO3 Pb-free piezoelectric ceramics, sintered at temperatures between 1080 °C and 1160 °C, was examined by X-ray diffraction analysis. The dielectric properties of 0.97(Na0.5K0.5)NbO3-0.03(Bi0.5Na0.5)TiO3 ceramics were measured from 1 kHz to 1 MHz for the various sintering temperatures. We expect that optimization of sintering parameters can improve the piezoelectric and ferroelectric properties of 0.97 (Na0.5K0.5)NbO3-0.03(Bi0.5Na0.5)TiO3 ceramics for energy harvesting.
通过使用无铅压电材料，自供电能量收集技术得到了深入研究。一种这样的无铅压电材料，即陶瓷0.97(Na0.5K0.5)NbO3 - 0.03(Bi0.5Na0.5)TiO3，是采用传统混合氧化物法制备的。制备了0.97(Na0.5K0.5)NbO3 - 0.03(Bi0.5Na0.5)TiO3陶瓷，并系统研究了烧结温度对其微观结构、压电和铁电性能的影响，以用于能量收集应用。通过X射线衍射分析研究了在1080℃至1160℃之间烧结的0.97(Na0.5K0.5)NbO3 - 0.03(Bi0.5Na0.5)TiO3无铅压电陶瓷的晶体结构。在不同烧结温度下，测量了0.97(Na0.5K0.5)NbO3 - 0.03(Bi0.5Na0.5)TiO3陶瓷在1kHz至1MHz范围内的介电性能。我们期望烧结参数的优化能够改善0.97(Na0.5K0.5)NbO3 - 0.03(Bi0.5Na0.5)TiO3陶瓷用于能量收集的压电和铁电性能。
