Abstract
Ferroelectric Lithium and Titanium modified Lead PotassiumNiobate ceramics were prepared by usingsolid-state reaction method. A single phase formation of the compounds with orthorhombic crystal system was confirmed by X- ray diffraction. The lattice parameters and dielectric behavior were investigated in a range of frequencies (500Hz-20 KHz) and temperatures (425 0 C-505 0 C). Substitution of Lithium and Titanium ions does not change the crystal structure, but decreased the lattice parameters and eventually the cell volume. The cell volumes in the Li substitutional composition have been found to be less when compared with the unsubstituted PKN. The phase transition temperatures (�� ��) have been observed from real and imaginary parts of the dielectric constant versus temperatures at 1 KHz in each of the composition. High �� ' and ��'' in low
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