Abstract
Specimens of barium titanate having the proper amounts of SnO2 in the range 1 to 5 mole % were sintered at 1350 o C for 4 h. The dielectric properties of the specimens were measured in the temperature range 40 o C - 160 o C. XRD, EDAX and SEM techniques were used to characterize the specimens. The results indicate that Sn-ions enter the tetragonal unit cell and replace Ti-ion and maintain the perovskite tetragonal structure. Addition of SnO2 lowered the Curie temperature of all specimens and increased the relative permittivity. All concentrations inhibited grain growth except the 1 mole % SnO2 which caused 16% increase in grain size. Keywords: Transition temperature; Loss tangent; Relative permittivity; Ceramics; Dielectric properties; Barium titanate; Tin oxide; XRD, SEM Pacs: 05.70; 76.30; 77.84-5; 77.84 Dy; 84.32 Tt.
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