首页|Effect of Cooling Rate on the Properties of the Grain Boundary of CaCu_3Ti_4O_(12) Ceramic
Effect of Cooling Rate on the Properties of the Grain Boundary of CaCu_3Ti_4O_(12) Ceramic
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Trans Tech Publications Ltd
The cooling rate effect on the grain boundaries of the CaCu_3Ti_4O_(12) ceramic was investigated in this research. The resistance at the grain boundaries is found to be reduced as the cooling rate rises. The activation energies at the grain boundaries do not change with the cooling rate, suggesting that the conduction mechanism keeps the same in different cooling conditions. There is no significant difference in the permittivity of the samples. The dielectric loss can be lowered by using a smaller cooling rate. These results give clues to comprehend the conductive mechanism of the CCTO ceramic. The variation of the cooling rate may affect the re-oxidation process and cause the changes in electric properties.
CaCu_3Ti_4O_(12)cooling rategrain boundary
Jinliang He、Fengchao Luo、Jun Hu、Yuan-Hua Lin
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State Key Lab of Power Systems, and Department of Electrical Engineering, Tsinghua University, Beijing 100084, P. R. China
State Key Lab of New Ceramics and Fine Processing, and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
NETL
NSTL
Trans Tech Publications Ltd
