| Elastic anomalies near phase transitions of lead-free （Na,Bi）TiO3 and （Ba,Zr）TiO3 ferroelectric ceramics |
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| 作者姓名： | Xiaozhou Liu Tingting Zhang Shujun Zhang Wenwu Cao |
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| 作者单位： | [1]Key Laboratory of Modern Acoustics, Institute of Acoustics,Nanjing University, Nanjing 210093, China [2]Materials Research Institute, The Pennsylvania State University,University Park, PA 16802, USA |
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| 基金项目： | supported by the National Basic Research Program of China (2012CB921504, 2011CB707902);the National Natural Science Foundation of China (11074122);Fundamental Research Funds for the Central Universities (1113020403, 1101020402);State Key Laboratory of Acoustics, Chinese Academy of Sciences (SKLA201207);the Priority Academic Program Development of Jiangsu Higher Education Institutions and SRF for ROCS, SEM and Project of Interdisciplinary Center of Nanjing University |
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| 摘 要： | We have investigated the temperature dependence of elastic modulus for various ferroelectric ceramics in the temperature range of 20–90°C.The Na0.5Bi0.5TiO3(NBT)ceramics has a phase transition at 200°C,thus exhibits minimal change in elastic modulus up to 90°C,while the elastic modulus of the BaZr0.07Ti0.93O3(BZT-7)shows 12.5%change at the phase transition temperature of70°C and that of the BaZr0.15Ti0.85O3(BZT-15)ceramics shows 34.6%change at the phase transition temperature of60°C.The variations of elastic modulus will affect the temperature stability of devices made by these lead-free ferroelectric ceramics.
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| 关 键 词： | 铁电陶瓷材料 弹性模量 相变温度 TiO3 无铅 BA 异常 Zr |
Elastic anomalies near phase transitions of lead-free (Na,Bi)TiO3 and (Ba,Zr)TiO3 ferroelectric ceramics |
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| Xiaozhou Liu,Tingting Zhang,Shujun Zhang,Wenwu Cao.Elastic anomalies near phase transitions of lead-free (Na,Bi)TiO3 and (Ba,Zr)TiO3 ferroelectric ceramics[J].Chinese Science Bulletin,2014,59(19):2287-2291. |
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| Authors: | Xiaozhou Liu Tingting Zhang Shujun Zhang Wenwu Cao |
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| Institution: | 1. Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, 210093, China
2. Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
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| Abstract: | We have investigated the temperature dependence of elastic modulus for various ferroelectric ceramics in the temperature range of 20–90 °C. The Na0.5Bi0.5TiO3 (NBT) ceramics has a phase transition at 200 °C, thus exhibits minimal change in elastic modulus up to 90 °C, while the elastic modulus of the BaZr0.07Ti0.93O3 (BZT-7) shows 12.5 % change at the phase transition temperature of 70 °C and that of the BaZr0.15Ti0.85O3 (BZT-15) ceramics shows 34.6 % change at the phase transition temperature of 60 °C. The variations of elastic modulus will affect the temperature stability of devices made by these lead-free ferroelectric ceramics. |
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| Keywords: | Elastic modulus Lead-freeferrooelectric ceramics Phase transition Temperature Ultrasonic method |
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