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Study of Ferroelectric Domain Structure of Barium Strontium Titanate Based Glass-Ceramics

The domain structure and its relation with the microstructure were studied in BST glass-ceramics with different concentration of AlF3 additive using several microscopic methods. It was shown that the increase of the AlF3 concentration led to larger grain size and smaller fraction of the glass regions. The piezoelectric force microscopy (PFM) domain contrast appeared after electric field poling. Larger PFM signal and higher fraction of the polarized grains were obtained for higher AlF3 concentration. The grain aggregates polarized almost in one direction were revealed. Essential dependence of the domain structure of glass-ceramics on its microstructure was confirmed.