ISSN:
1432-0630
Keywords:
PACS: 81.10.Fq; 81.30.Dz; 42.70.Nq
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
3 –CaTiO3 is investigated with regard to a congruently melting composition. The liquidus curve is determined from x=0.0 to 0.3, where x is the mole fraction of CaTiO3. It shows a minimum melting point near x=0.23. Ba1-xCaxTiO3 crystals are grown by the Czochralski technique from melts close to this composition. X-ray fluorescence analyses of the crystals indicate a congruently melting composition at x=0.227, corresponding to the observed minimum melting point. At the growth temperature the crystals possess a cubic perovskite-type structure. They undergo a structure change to the ferroelectric tetragonal phase at 98±3 °C, indicated by a sharp peak of the dielectric constant. Down to -120 °C no further phase transition is observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003390050583
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