Authors:
T. Yoshida Tokyo Institute of Technology Materials and Structures Laboratory 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan

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Y. Moriya The University of Tokyo Department of Chemical System Engineering 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan

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T. Tojo Tokyo Institute of Technology Materials and Structures Laboratory 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan

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H. Kawaji Tokyo Institute of Technology Materials and Structures Laboratory 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan

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T. Atake Tokyo Institute of Technology Materials and Structures Laboratory 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan

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Y. Kuroiwa Hiroshima University Department of Physical Science, Graduate School of Science 2-313 Kagamiyama Higashi-Hiroshima 739-0046 Japan

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Abstract  

The heat capacity of PbMO3 (M=Ti, Zr and Hf) at constant pressure was measured using a differential scanning calorimeter (DSC) from room temperature up to 870 K. Large anomalies were found in the heat capacity curves, corresponding to the ferroelectricparaelectric phase transition in PbTiO3 (PT), the antiferroelectric-paraelectric phase transitions in PbZrO3 (PZ) and PbHfO3 (PH). The transition entropies were estimated as 7.3 J K−1 mol−1 (PT), 9.9 J K−1 mol−1 (PZ) and 9.3 J K−1 mol−1 (PH). These values of transition entropies are much larger than that of a typical displacive-type phase transition.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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