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| Conductance of Like Perovskite Structure ACu3Ti4O12 Materials |
| ZHOU Xiaoli |
| (School of Physics and Electronic Engineering, Taizhou University, Taizhou 318000, Zhejiang, China) |
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Abstract CaCu3Ti4O12 and La2/3Cu3Ti4O12 materials were prepared by solid reaction process, and the conductance properties were measured and studied. The experimental data show that the conductancetemperature curves of CaCu3Ti4O12 and La2/3Cu3Ti4O12 are similar. In the lower temperature range (<150 K), the conductance increases with the temperature and the samples exhibit negative resistancetemperature properties. In the temperature range of 150－170 K, the conductance reaches its maximum. Then, in the higher temperature range (170－250 K), the conductance decreases with the temperature. But the maximum value of conductance of CaCu3Ti4O12 is about 3 times larger than that of La2/3Cu3Ti4O12. Further analysis shows that after Ca 2＋ is replaced by La 3＋, onethird of vacancies remain in A sites, which results in the activation energy of La2/3Cu3Ti4O12 reaching 1.01 eV. The higher activation energy is the main cause of lower conductance of La2/3Cu3Ti4O12.
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Received: 10 May 2009
Published: 31 May 2010
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CHEN Zhijun1,2，YANG Chunli1，WU Xiusheng1，LIU Wei1. [J]. J. Shanghai Jiaotong Univ.(Sci.) , 2010, 44(05): 692-0696. |
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LU Xuemei,LIU Qingsuo,HE Xuankun,ZHANG Yujiao. The Damping Capacities Effect on NiTi Film to PZT Material [J]. J. Shanghai Jiaotong Univ.(Sci.) , 2010, 44(05): 708-0710. |
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WENG Wei,WANG Haowei,MA Naiheng. High Damping SiO2Coated LiNbO3 Particles Reinforced ZL102 Composites and Piezo-damping Features [J]. J. Shanghai Jiaotong Univ.(Sci.) , 2010, 44(05): 711-0714. |
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