3Seaton J, Leach C. Direct measurement of electrical and compositional inhomogeneities in PTC thermistor [J]. J Eur Ceram Soc, 2004, 24: 1217-1220.
4Dewitte C, Elst R, Dclannay E On the mechanism of dclamination fracture BaTiO3-bascd PTC thermistor [J]. J Eur Ccram Soc, 1994, 14:481 -492.
5Kroupa F, Ncjczchlcb K, Ratai J. Non-homogeneous distribution of internal stresses and cracks in poled F-ZT ceramics [J]. Ferroelectrics, 1989, 100:281 -290.
6Heywang W, Steeles B C H(ed). Electronic Ceramics [M]. New York: Elsevier Sci Publishing, 1991.29 - 47.
7McCartney J H, Casselton R E W, Morter C M. Advances in PTC thermistor technology [J]. Br Ceram Proc, 1991, 50: 69-76.
8Reed J S.. Introduction to the Principles of Ceramic Processing [M]. Hoboken N J, USA: Wiley Interscience, 1987. 313-349.
9Cannell D, Trigg E Jon G P(ed), Advanced Ceramic processing & Technology [M]. Park Ridge N J, USA: Noyes Publication, 1990.
10Chol K J, Biegalski M, Li Y L. Enhencement of ferroelectrics in strained BaTiO3 thin film [J]. Science, 2004, 306(11): 1005-1009.
