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tilamisu

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题名:Dielectric properties and ac conductivities of dense single-phased BiFeO3 ceramics
作者:Jhih-Cyun Chen and Jenn-Ming Wu
来源:Appl. Phys. Lett. / Volume 91 / Issue 18,2007
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tilamisu(金币+10,VIP+0):谢了 9-10 15:58
洛阳学子(金币+1,VIP+0):多谢交流 9-10 17:33
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2楼2009-09-10 14:44:24
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洛阳学子(金币+1,VIP+0):热心回复 9-10 17:32
Dense single-phase BiFeO3BFO ferroelectric ceramics, with a resistivity of 1012  cm, may be formed by sintering the 450 °C-calcined coprecipitated powder at 800–850 °C. The ceramics sintered at 750 °C contain a second phase of Bi2O3. The conduction loss activation energies at room temperatures of 290 and 350–430 °C are 0.126 and 1.26 eV, respectively. The ac conductivity thermal variation suggests 290 °C as the application limit for BFO ceramics. The loss at T350 °C is higher for low frequencies than for high frequencies. In contrast, an opposite effect is found at T350 °C. © 2007 American Institute of Physics. DOI: 10.1063/1.2798256
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