High temperature impedance spectroscopy study of non-stoichiometric bismuth zinc niobate pyrochlore

• Autorzy: Tan K. B. , Khaw C. C. , Lee C. K. , Zainal Z. , Tan Y. P. , Shaari H.
• Języki publikacji: EN

Abstrakty

EN

Single phase non-stoichiometric bismuth zinc niobate, Bi3Zn1.84Nb3O13.84 was prepared by a conventional solid state method. The sample was refined and fully indexed on the cubic system, space group Fd3m, Z = 4 with a = 10.5579(4) A. Electrical characterisation was performed using an ac impedance analyser over the temperature range of 25-850 °C and frequency range of 5 Hz - 3 MHz. Typical dielectric response was observed in Bi3Zn1.84Nb3O13.84with high relative permittivity, low dielectric loss and negative temperature coefficient of capacitance, with the values of 147, 0.002 and -396 ppm/°C, at 100 kHz at ambient temperature, respectively. The material is highly resistive, with the conductivity of 10-21 ohm-1ocm-1 and a high activation energy of 1.59 eV.

Słowa kluczowe

EN

activation energy; bismuth zinc niobate; dielectric response; impedance spectroscopy; pyrochlore

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2009
• Tom: Vol. 27, No. 4/1
• Strony: 947--959
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Tan K. B.

autor

Khaw C. C.

autor

Lee C. K.

autor

Zainal Z.

autor

Tan Y. P.

autor

Shaari H.

• Faculty of Science Universiti Putra Malaysia 43400 Serdang, Selangor Malaysia

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