Effects of Glass-Additives on the Properties of Ni/Ceramic PTC Composites


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The effects of glass additives on the sintering and properties of Ni/(Ba0.92Sr0.08)TiO3 composites were investigated. Due to the addition of glass additives, Ni/ceramic composites with low room-temperature resistivity and obvious PTC effect were obtained at a low sintering temperature. It was shown that glass-additives could form liquid phase that aided the solution and diffusion of solid atoms, acting as sintering aids to accelerate the sintering and lower the sintering temperature. The room-temperature resistivity decreased first and increased later with the increasing content of glassadditives, which was explained by two functions of glass-additives, decreasing interface contact resistance as sintering aids and adding volume resistance as insulators. Moreover, a suitable amount of glass-additives could enhance the PTC effect unexpectedly, which was attributed to the decrease of the contact resistance existing at the ceramic/ceramic interface.



Key Engineering Materials (Volumes 280-283)

Edited by:

Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li




Y. F. Qu et al., "Effects of Glass-Additives on the Properties of Ni/Ceramic PTC Composites", Key Engineering Materials, Vols. 280-283, pp. 337-340, 2005

Online since:

February 2007




[1] Z.M. He, J. Ma, Y.F. Qu and X.M. Feng: J. Eur. Ceram. Soc. Vol. 22 (2002), p.2143.

[2] E. Gang, T. Nobuyuki and I. Shingo: J. Ceram. Soc. Jpn. Vol. 105 (1996), p.1091.

[3] D.M. Zhang, X.Y. Zhang and F.M. Peng: J. Inorg. Mater. Vol. 10 (1995), p.248.

[4] D.S. Mclachlan, M. Blaszkiewicz and R.E. Newnham: J. Am. Ceram. Soc. Vol. 73 (1990), p.2187.

[5] D.R. Lide: Handbook of Chemistry and Physics. 83rd, USA: CRC Press LLC (2002).

[6] D.L. Zhang, D.X. Zhou and S.L. Jiang: Pizoelectrics & Acoustooptics Vol. 24 (2002), p.26.

[7] Y.H. Sun, Y.F. Zhang and J.K. Guo: J. Inorg. Mater. Vol. 17 (2002), p.1227.