We have investigated by numerical methods the temperature stresses in thermistors with a positive temperature coefficient of resistance based on semiconductor barium titanate ceramics under the action of current loads. It has been shown that by changing the form of the ceramic element it is possible to attain an almost 50% decrease in the maximum tensile temperature stresses compared to thermistors of the classical form.
Similar content being viewed by others
References
I. T. Sheftel’, Temperature-Sensitive Resistors [Russian translation], Nauka, Moscow (1973).
W. Heywang, Semiconducting barium titanate, J. Mater. Sci., 6, 1214–1226 (1971).
C. Dewitte, R. Elst, and F. Delannay, On the mechanism of delamination fracture of BaTiO3-based PTC thermistors, J. Eur. Ceram. Soc., 14, 481–492 (1994).
V. N. Shut, S. R. Syrtsov, E. L. Gavrilenko, and A. V. Gavrilov, Temperature fields in temperature-sensitive resistors on basis of barium titanate, Sci. Mater., No. 2, 12–16 (2005).
V. N. Shut and A. V. Gavrilov, Temperature stresses in barium-titanate-based semiconductor ceramics, Inzh.- Fiz. Zh., 81, No. 3, 596–601 (2008).
J. M. Blamey and T. V. Parry, The effect of processing variables on the mechanical and electrical properties of barium titanate positive temperature coefficient of resistance ceramics. I. Additives and processing prior to sintering, J. Mater. Sci., 28, 4311–4316 (1993).
J. M. Blamey and T. V. Parry, The effect of processing variables on the mechanical and electrical properties of barium titanate positive temperature coefficient of resistance ceramics. II. Sintering atmospheres, J. Mater. Sci., 28, 4317–4324 (1993).
S. W. Freiman and R. C. Pohanka, Review of mechanically related failures of ceramic capacitors and capacitor materials, J. Am. Ceram. Soc., 72, No. 12, 2258–2263 (1989).
V. N. Shut and A. V. Gavrilov, Temperature stresses in heterogeneous barium-titanate-based thermistors, Inzh.- Fiz. Zh., 82, No. 5, 981–983 (2009).
V. N. Shut and A. V. Gavrilov, Thermal stresses in layered barium titanate-based semiconductor ceramic, Tech. Phys., 53, No. 11, 1508–1512 (2008).
A. N. Pavlov and I. P. Raevskii, Varistor effect in semiconductor ferroelectric ceramics, Zh. Tekh. Fiz., 67, No. 12, 21–25 (1997).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 84, No. 3, pp. 640–644, May–June, 2011.
Rights and permissions
About this article
Cite this article
Shut, V.N., Gavrilov, A.V., Razumov, V.N. et al. Methods for decreasing thermoelastic stresses in barium-titanate-based thermistors. J Eng Phys Thermophy 84, 695–699 (2011). https://doi.org/10.1007/s10891-011-0523-7
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10891-011-0523-7