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摘要
Ferroelectric properties of BaTi1-xHf O-x(3) ceramics with Hf content x=0, 0.001, and 0.025 were examined. It was found that the substitution of Hf4+ for Ti4+ in BaTiO3 resulted in shifting the two low-temperature transitions (T-1, T-2) of the investigated samples to higher temperatures and decreasing the tetragonal-cubic phase transition temperature (T-c). This is a well-known pinching effect. Thermal parameters of the transitions, such as the enthalpy H and the entropy S, were also estimated and discussed.
- 出版日期2013-9-1
