Positive Temperature Coefficient of Resistivity in Ba1‐xSrxPb1+yO3‐8 Ceramics

Journal of the American Ceramic Society - Tập 76 Số 8 - Trang 2053-2058 - 1993
Hidetoshi Nagamoto1, Hiroshi Kagotani1, Tatsuya Okubo1, Toshiyuki Koya2
1Engineering Researeh Institute, The University of Tokyo, Tokyo 113, Japan
2Ebara Corporation, Fujisawa 251, Japan

Tóm tắt

The positive temperature coefficient of resistivity (PTCR) effect in Ba1‐xSrxPb1+yO3‐s ceramics is systematically studied. The influence of the preparation conditions on the PTCR properties is experimentally tested. The PTCR effect in metallic‐conducting BaPb1+yO3 is confirmed around 700°C. The temperature where the PTCR effect starts can be shifted to a higher temperature range by substituting strontium for the A‐site barium. By the enhancement of the sintering, the magnitude of the PTCR effect was increased and the resisitivity was reduced. In addition to Pb(IV) in the perovskite structure, Pb(II) is detected at the grain boundary in the sintered body.

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Tài liệu tham khảo

P. W.Haayman R. W.Dam andH. A.Klassen “Semiconductive Materials ” Ger. Pat. No. 929350 June 23 1955.

10.1111/j.1151-2916.1964.tb13795.x

10.1016/0038-1101(64)90068-1

10.1080/00150197008241491

10.1143/JPSJ.14.1159

10.1111/j.1151-2916.1981.tb15861.x

10.1111/j.1151-2916.1981.tb15902.x

10.1111/j.1151-2916.1983.tb10578.x

Kuwabara M., 1985, Preparation of High‐Curie‐Point Barium‐Lead Titanates and Their PTCR Characteristics, Am. Ceram. Soc. Bull., 64, 1394

10.1111/j.1151-2916.1988.tb05844.x

10.1111/j.1151-2916.1963.tb13770.x

10.1111/j.1151-2916.1980.tb10199.x

10.1080/07315178408202423

10.1080/00150198708009024

10.1080/00150198808235458

10.1143/JJAP.9.716

Kuwarnoto H., 1980, Electrical Properties of the (V1 xCrx)203 System, Phys. Rev. B: Condens. Matter, 22, 2626, 10.1103/PhysRevB.22.2626

10.1111/j.1151-2916.1970.tb15990.x

10.1016/0038-1098(75)90327-0

S.NomuraandY.Yoshino “High‐Temperature PTC Material and Its Manufacture ”Jpn. Kokai Tokkyo Koho JP 60118662 June 26 1985.

10.1007/BF01105103

H. L.TullerandW.Hills “Positive Temperature Coefficient Resistor ” U.S. Pat. No. 4951028 Aug. 21 1990.

10.1016/0038-1098(92)90008-W

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Journal of the American Ceramic Society

Tập 76 Số 8

2053-2058

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