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SM ISO690:2012 JABAROV, Sakin, KOZLENKO, Denis, KICIANOV, Serghei, MAMEDOV, A., MEHDIEVA, R., LUKIN, Evghenii, SAVENCO, B, LATHEC, C.. Pressure Induced Change in the Order of the Phase Transition in Lead Titanate: Structural Aspects. In: Surface Engineering and Applied Electrochemistry, 2012, nr. 1(48), pp. 69-73. ISSN 1068-3755. |
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Surface Engineering and Applied Electrochemistry | ||||||
Numărul 1(48) / 2012 / ISSN 1068-3755 /ISSNe 1934-8002 | ||||||
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Pag. 69-73 | ||||||
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The crystal structure of lead titanate PbTiO3 have been studied by energy dispersive X ray diffraction under pressures of 0–4 GPa in the temperature range of 300–950 K. At a temperature of T = 747 K, a structural phase transition from a ferroelectric tetragonal phase to a paraelectric cubic phase is observed. The application of pressure leads to a significant decrease in the phase transition temperature; under pressures of P ~ 2 GPa, the type of the phase transition changes from the first to second order. In the low pressure range, the baric coefficient value is dTc/dP = –20(3) K/GPa; under pressures above 2 GPa, it increases up to –113(5) K/GPa.
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