The effects of sintering temperature on the properties of (Na_0.5K_0.5)NbO₃–CaTiO₃ based lead-free ceramics

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• 作者：Ren-Chuan Chang ; Sheng-Yuan Chu ; Yi-Fang Lin ; Cheng-Shong Hong ; Po-Ching Kao ; Chun-Hsien Lu
• 关键词：(Na ; K)NbO₃ ; CaTiO₃ ; Sintering temperature ; Perovskites ; Piezoelectric
• 刊名：Sensors and Actuators A ; Physical
• 出版年：2007
• 期刊代码：160_09244247
• 类别：et
• 出版时间：26 August 2007
• 卷：138
• 期：2
• 页码：355-360
• 文件大小：711 K

摘要

Lead-free (Na_0.5K_0.5)NbO₃ ceramics doped with 0.5 mol%CaTiO₃ have been prepared by the conventional mixed-oxide method with sintering temperature at 1040–1120 °C in this paper. The samples are characterized by X-ray diffraction analysis and scanning electron microscopy. The dielectric, piezoelectric and ferroelectric properties are also investigated. The results present that the increase of the sintering temperature is very effective in improving the density and electric properties. However, the properties of the samples would be deteriorated as they are sintered over the optimum temperature. The NKN-0.5%CT ceramics show excellent properties with sintering temperature at 1100 °C.