(1-x)CaTiO3-x(La1/3Nd1/3)TiO3계의 합성과 결정구조

목차

1. 서 론

2. 실험방법

2.1 (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (0≤x≤0.8)합성 및 시편제조
2.2 (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (0≤x≤0.8)의 결정구조 정밀화

3. 결과 및 고찰

4. 결 론

5. 참고문헌

본문내용

973).
10. R. C. Kell, A, C, Greenham and G. C. E. Olds, "High-Permitivity Temperature-Stable Ceramic Dielectrics with Low Microwave Loss" J. Am. Ceram. Soc., 56(7) 352 (1973).
11. H. J. A. Koopmans, G. M. H. van de Velde, and P.J. Gellings, "Powder Neutron Diffraction Study of the Perovskites CaTiO3 and CaZrO3", Acta cryst., C39 1323 (1983).
12. H. F. Kay and P. G. Bailey, Acta cryst., 10, 219 (1957)
13. F. Izumi, Chap. 13ed. by R. A. Young, (Oxford University Press, Oxford, 1993).
14. D. Shannon, Acta cryst., A32, 751 (1976).
15. "International Tables for Crystallography" Vol A Space-Group symmetry (The International Union Crystallography, 1987).
16. L. Pauling, "The use of atomic radii in the discussion of interatomic distances and lattice constants of crystals" Acta cryst., 10 685 (1957)
17. Kim Ho-Sung, Ionics Program (Gasan Electronic) (1996)
18. G. Shirane, h. Danner, and R. Pepinsky, Phys. Rev., 105, 856 (1957)
TABLE CAPTION
Table 1 Lattice parameters of (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 system, (0≤x≤0.8)
Table 2 Space group and atomic site of (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (0≤x≤0.6) and (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (x=0.8)
Table 3 Refined atomic parameters of (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (0≤x≤0.6)
Table 4 Refined atomic parameters of (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (x=0.8)
Table 5 Atomic distance and angle on TiO6 octahedron (0≤x≤0.8)
FIGURE CAPTION
Fig. 1 X-ray diffraction patterns of (1-x)CaTiO3-x(La1/3Nd1/3)TiO3 (0≤x≤0.8) system
sintered at 1400℃ for 3hrs.
Fig. 2 The variation of the lattice parameters and volumes with x content.
Fig. 3 X-ray pattern of CaTiO3 by Rietveld profile method.
Fig. 4 X-ray Rietveld profile of 0.4CaTiO3-0.6(La1/3Nd1/3)TiO3 by Rietveld profile
method.
Fig. 5 X-ray Rietveld profile of 0.2CaTiO3-0.8(La1/3Nd1/3)TiO3 by Rietveld profile
method.
Fig. 6 Refined crystal structure of CaTiO3. (a) (100) (b) (010) (c) (001)
Fig. 7 Refined crystal structure of 0.4CaTiO3-0.6(La1/3Nd1/3)TiO3.
(a) (100) (b) (010) (c) (001)
Fig. 8 Refined crystal structure of 0.2CaTiO3-0.8(La1/3Nd1/3)TiO3.
(a) (100) (b) (010) (c) (001)
Fig. 9 The variation of distortion and tile on (010) plane with x content.
(a) x=0 (b) x=0.2 (c) x=0.4 (d) x=0.6 (e) x=0.8

키워드

TiO3계의 합성,   결정구조