Preparation of Bi-Based High Curie Temperature PTCR Ceramic


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PTCR ceramic samples of two systems, Bi4Ti3-xNbxO12+x/2(BTNO, 0≤x≤0.01) and Bi4Ti3O12 + (1-z)BaTi1-xNbxO3+x/2+2.0mol%TiO2 (BTO+(1-z)BTNO, 0≤x≤0.01, 0≤z≤1.0), were prepared by mixed oxide method. The properties of the sapmples were characterized by XRD, AFM and electrical properties testing. The results showed that single BaBi4Ti4O15 was obtained when x=0.05 and z=0.5. The roomtemperature resistivity of BTO+(1-z)BTNO ceramic sintered in air was 102-1045·cm. The minimum resistivity occurred at Nb content of about 0.3mol%.



Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong




Y. H. Liang et al., "Preparation of Bi-Based High Curie Temperature PTCR Ceramic", Key Engineering Materials, Vols. 368-372, pp. 459-460, 2008

Online since:

February 2008




[1] W. Heywang: solid State Electron Vol. 3 (1961), p.51.

[2] C.H. Lai and T.Y. Tseng: J. Amer. Ceram. Soc. Vol. 77 (1994), p.2419.

[3] Y. Nakai and S. Fukouka: J. Appl. Phys. Vol. 38 (1999), p.5568.

[4] V.M. Gurevich, Electric Conductivity of Ferroelectrics. (Translated from Russian by the Israel Program for Scientific Translations, Jerusalem, 1971), p.293.

[5] M. Kuwabara and K. Morimo: J. Amer. Ceram. Soc. Vol. 79 (1996), p.997.

[6] A. Herbut and A. Safari: J. Amer. Ceram. Soc. Vol. 80 (1997), p.2954.

[7] B.M. Kulwiki: Ferroelectrics Vol. 1(1971), p.253. Fig. 2 Relationship between room- temperature resistivity and amount of Nb 5+ introduced.

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