Date of Award
2013
Document Type
Thesis
Degree Name
Bachelors
Department
Natural Sciences
First Advisor
Sendova, Mariana
Keywords
Differential Scanning Calorimetry
Area of Concentration
Physics, Barium Titanate, Phase Transitions
Abstract
Barium titanate (BaTiO3) has a multitude of applications in the electronics industry due to its high dielectic constant and ferroelectric properties. Use of this material in small-scale electronics is limited, however, by its loss of ferroelectricity below a certain critical particle size. Differential heat flow bands detected during thermal cycling were associated with BaTiO3 structural transitions. Specific heat capacities of 50 nm, 100 nm, 200 nm, and 300 nm BaTiO3 powders were calculated at every 0.5 K between 134 K and 451.5 K. The bands around the phase transitions were fitted with Split-Pearson VII functions to obtain peak position, full-width half-maximum (FWHM), and transition enthalpy. The 300 nm and 50 nm data were also compared with 260 cm-1 Raman mode data. It was found that the phase transitions are size-dependent.
Recommended Citation
Myers, Emily, "PHASE TRANSITIONS OF BaTiO3 NANOPARTICLES STUDIED BY DIFFERENTIAL SCANNING CALORIMETRY" (2013). Theses & ETDs. 6807.
https://digitalcommons.ncf.edu/theses_etds/6807
Rights
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