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J. Korean Ceram. Soc. > Volume 48(5); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(5): 471.
doi: https://doi.org/10.4191/kcers.2011.48.5.471
다이아몬드 엔빌 셀을 이용한 Donor doped Pb(Zr0.52Ti0.48)O3 세라믹스의 상전이 압력 연구
조경호, 고영호, 서창의, 김광주
국방과학연구소 4기술연구본부 2부
The Study on Phase Transition Pressure of Donor doped Pb(Zr0.52Ti0.48)O3 Ceramics with Diamond Anvil Cell
Kyung-Ho Cho, Young-Ho Ko, Chang-Eui Seo, Kwang-Joo Kim
Agency for Defense Development, The 4th R&D Institute-2
Investigations of crystal structure and phase transition of $Pb(Zr_{0.52}Ti_{0.48})O_3$ ceramics doped with A-site substitution impurity (La, Nd) or B-site substitution impurity (Sb, Nb) at 2 mol% concentration were carried out. X-ray diffraction patterns of impurities doped $Pb(Zr_{0.52}Ti_{0.48})O_3$ ceramics have been measured at pressures up to ~5 GPa with diamond anvil cell and synchrotron radiation. The patterns were obtained at room temperature using methanol-ethanol mixture as pressure-transmitting media. In order to refine the crystal structure, Rietveld analysis has been performed. The structures of impurities doped $Pb(Zr_{0.52}Ti_{0.48})O_3$ ceramics are tetragonal in space group P4mm at ambient pressure and are transformed into a cubic phase in space group Pm$bar{3}$m as the pressure increases. In this study, when A-site substitution donor $La^{3+}$ or $Nd^{3+}$ ion was added to $Pb(Zr_{0.52}Ti_{0.48})O_3$ ceramics, the phase transition phenomena showed up at the pressure of 2.5~4.6 GPa, but when B-site substitution donor $Nb^{5+}$ or $Sb^{5+}$ ion was added to it, the phase transition appeared at relatively lower pressure of 1.7~2.6 GPa.
Key words: Diamond anvil cell, Crystal structure, Phase transition, PZT
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