Effect of simultaneous substitution of magnesium and niobium on dielectric properties and phase transition temperature of bismuth sodium barium titanate ceramics

• Autorzy: Zereffa E. A. , Prasad Rao A. V.
• Języki publikacji: EN

Abstrakty

EN

Department of Inorganic and Analytical Chemistry, College of Science and Technology, Andhra University, Visakhapatnam – 530003 (Bi1/2Na1/2)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramic samples with x = 0.0, 0.01, 0.05, 0.15, 0.20 were synthesized by solid state method. Microstructure, dielectric properties, impedance and conductivity of the ceramics were studied. Phase formation was confirmed by X-ray diffraction. Co-doping of the ceramics with Mg and Nb at x = 0.01 raised the dielectric constant from 6510 to 8225 at the frequency of 1 KHz. Further increase in (Mg1/3Nb2/3)4+ concentration up to 0.15 increased the transition temperature from 275 °C to 339 °C and lowered the dielectric constant. The ac impedance measurements showed a linear response with frequency at lower temperature indicating insulating behavior and a single semicircular arc with spike at higher temperature.

Słowa kluczowe

EN

(Bi0.5Na0.5)0.94Ba0.06TiO3; dielectric properties; ferroelectric properties; sintering and microstructure

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2013
• Tom: Vol. 31, No. 2
• Strony: 201--210
• Opis fizyczny: Bibliogr. 27 poz., rys., tab., wykr.

Twórcy

autor

Zereffa E. A.

• Department of Inorganic and Analytical Chemistry, College of Science and Technology, Andhra University, Visakhapatnam – 530003

autor

Prasad Rao A. V.

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