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참고문헌 (28)

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2. W. Heywang, 'Resistivity Anomaly in Doped Barium Titanate,' J. Am. Ceram. Soc., 47 [10] 484-90 (1964) 

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3. B. Huybrechts, PhD. Thesis, Nagaoka University of Technology, Japan, 1994 

4. B. Huybrechts, K. Ishizaki, and M. Takata, 'Review: The Positive Temperature Coefficient of Resistivity in Barium Titanate,' J. Mat. Sci., 30 2463-74 (1995) 

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7. H. Sumino, O. Sakurai, K. Shinozaki, and N. Mizutani, 'Direct Measurement of the PTC Effect of a Single Grain Boundary,' J. Ceram. Soc. of Jpn., 100 [1] 97-100 (1992) 

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8. J. Daniels, K. H. Hardtl, and R. Wernicke, 'The PTC Effect of Barium Titanate,' Philips Tech. Rev., 38 [3] 73-82 (1978/79) 

9. J. Daniels and R. Wernicke, 'Part V. New Aspects of an Improved PTC Model,' Philips Res. Repts., 31 544-59 (1976) 

10. J. Daniels, 'Part II. Defect Equilibria in Acceptor Doped Barium Titanate,' Philips Res. Rep., 31 505 (1976) 

11. J. Daniels and K. H. Hardtl, 'Part I. Electrical Conductivity at High Temperatures of Donor Doped Barium Titanate Ceramics,' Philips Res. Repts., 31 489 (1976) 

12. R. Wernicke, 'Part IV. The Kinetics of Equilibrium Restoration in Barium Titanate Ceramics,' Philips Res. Rep., 31 526 (1976) 

13. D. Hennings, 'Part III. Thermogravimetric Investigations,' Philips Res. Rep., 31 516 (1976) 

14. G. H. Jonker, 'Some Aspects of Semiconducting Barium Titanate,' Solid State Electron., 7 895-903 (1964) 

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15. H. M. Al-Allak, A. W. Brinkman, G. J. Russel, and J. Woods, 'The Effect of Mn on the Positive Temperature Coefficient of Resistance Characteristics of Donor Doped $BaTiO_3$ Ceramics,' J. Appl. Phys., 63 [9] 4530-35 (1988) 

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16. H. Ueoka, 'The Doping Effects of Transition Elements on the PTC Anomaly of Semiconductive Ferroelectric Ceramics,' Ferroelectrics, 7 351-53 (1974) 

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17. H. Ueoka and M. Yodogawa, 'Ceramic Manufacturing Technology for the High Performance PTC Thermistor,' IEEE Trans. Manuf. Tech., 3 [2] 77-82 (1974) 

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18. H. Ihrig, 'PTC Effect in $BaTiO_3$ as a Function of Doping with 3d Elements,' J. Am. Ceram. Soc., 64 [10] 617-20 (1981) 

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19. T. Matuoka, Y. Matuo, H. Sasaki, and S. Hayakawa, 'PTCR Behavior of $BaTiO_3$ with $Nb_2O_5$ and $MnO_2$ Additives,' J. Am. Ceram. Soc., 55 [2] 108 (1972) 

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20. H. J. Hagemann and H. Ihrig, 'Valance Change and Phase Stability of 3d Doped $BaTiO_3$ Annealed in Oxygen and Hydrogen,' Phys. Rev. B, 20 [9] 3871-78 (1979) 

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21. H. J. Hagemann and D. Hennings, 'Reversible Weight Change of Acceptor Doped $BaTiO_3$ ,' J. Am. Ceram. Soc., 64 [10] 590-93 (1981) 

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22. J. H. Lee, S. H. Kim, and S. H. Cho, 'Valency Change of Mn Ions in $BaTiO_3$ -Based PTCR Materials,' J. Am. Ceram. Soc., 78 [10] 2845-48 (1995) 

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23. H. Ihrig, 'The Phase Stability of $BaTiO_3$ as a Function of Doped 3d Elements: An Experimental Study,' J. Phy. C: Solid State Phys., 11 [4] 819-27 (1978) 

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24. Y. M. Chiang and T. Takagi, 'Grain-Boundary Chemistry of Barium Titanate and Strontium Titanate: I, High Temperature Equilibrium Space Charge,' J. Am. Ceram. Soc., 73 [11] 3278-85 (1990) 

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25. M. Nakahara and T. Murakami, 'Electron Status of Mn Ions in $Ba_{0.9}7Sr_{0.03}TiO_3$ Single Crystals,' J. Appl. Phys., 45 [9] 3795-800 (1974) 

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26. I. Burn, 'Mn-Doped Polycrystalline $BaTiO_3$ ,' J. Mater. Sci., 14 2453-58 (1979) 

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27. G. Koschek and E. Kubalek, 'Grain Boundary Characteristics and their Influence on the Electrical Resistance of Barium Titanate Ceramics,' J. Am. Ceram. Soc., 68 [11] 582- 85 (1985) 

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28. G. Koschek, 'A Contribution to the Microanalysis of Acceptor States at the Grain Boundaries in Barium Titanate Ceramics,' Deutschen Keramischen Gesellschaft, 66 [3/4] 128 (1989) 

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