Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 21, Issue -, Pages S400-S404Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(11)61614-2
Keywords
CaCu3Ti4O12 ceramics; dielectric constant; dielectric loss; sintering time
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CaCu3Ti4O12 powder was prepared by sol-gel technique, and the CaCu3Ti4O12 composites were sintered at 1 000 degrees C for different time after cold pressing with the same pressure and time. The results exhibit that the grain size is affected by the pressure and sintering time. The impedance spectrum measurement results show that both the dielectric constant and dielectric loss have a weak frequency dependence over large frequency region of 50 Hz to 100 kHz, and not only does the dielectric loss decrease but also the dielectric constant remains high sufficiently. The most suitable sintering time is 6 h.
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