열자극 탈분극전류 방법에 의한 BaTiO 3 의 분극 특성 연구

송호준; 이용렬; 박영준; Ho-Jun Song; Yong-Ryeol Lee; Yeong-Joon Park

Korean Journal of Materials Research, Vol.12, No.8, 613-616, August, 2002

DOI10.3740/MRSK.2002.12.8.613 Export Citation

열자극 탈분극전류 방법에 의한 BaTiO 3 의 분극 특성 연구

Study on Polarization Properties of BaTiO 3 by Using Thermally Stimulated Depolarization Current

송호준^†, 이용렬¹, 박영준¹

한국기초과학지원연구원 광주분소
¹전남대학교 치과대학 치과재료학교실 및 치과재료연구소

Ho-Jun Song^†, Yong-Ryeol Lee¹, and Yeong-Joon Park¹

Korea Basic Scinece Institute Gwangju Branch, Chonnam National University, Gwangju 500-757, Korea
¹Dept. of Dental Materials and Dental Materials Research Institute, College of Dentistry, Chonnam National University, Gwangju 501-840, Korea

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The polarization properties of BaTiO 3 were investigated by using thermally stimulated depolarization current (TSDC) technique. Two peaks were observed at about 400 K (peak A) and 435 K (peak B) from TSDC spectra obtained from the temperature range of 280-500 K. Peak A shows a sharp decrease of TSDC due to extinction of spontaneous polarization above the phase transition temperature of BaTiO 3 . The values of activation energy of peak A and peak B were calculated to be 0.70 eV and 0.87 eV respectively. From the results of TSDC measurement with a variation of polarizing electric field strength, we found that saturation of total current of TSDC was started from 3kV/cm. However, the amount of total current of TSDC was not affected by the variation of polarizing time.

Keywords:TSDC;ferroelectric;barium titanate;polarization

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[4] Yasuda I, Noguchi K, Sata T, J. Bone. Joint. Surg., 37-A(6), 1292 (1955)

[5] Yamashita K, Oikawa N, Umegaki T, Chem. Mater., 8, 2697 (1996)

[6] Park YJ, Lee YR, Song JE, Hwang KS, Ong JL, Rawls HR, J. Dent. Res., 80(SI), 569 (2001)

[7] Salman NN, Park JB, Biomaterials, 1, 209 (1980)

[8] Bucci C, Fieschi R, Phys. Rev. Lett., 12, 16 (1964)

[9] Suszynska M, Macalik B, Nikl M, J. Appl. Phys., 86(2), 1090 (1999)

[10] Alegria A, Goitiandia L, Colmenero J, Polymer, 37(14), 2915 (1996)

[11] Kalogeras IM, Vassilikou-Dova A, Katerinopolou A, J. Appl. Phys., 92(1), 406 (2002)

[12] Topic M, Music S, Ristic M, Mater. Chem. Phys., 76(3), 236 (2002)

[13] Chen R, Kirsh Y, Analysis of Thermally Stimulated Processes, p. 66, Pergamon Press, Oxford, New York, (1981) (1981)