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X-ray diffraction analysis of lanthanum and titanium substituted lead zirconate

Published online by Cambridge University Press:  06 March 2012

Nichole Wonderling ,
Else Breval  and
Joseph P. Dougherty
Nichole Wonderling
Affiliation:
Materials Research Institute, Penn State University, University Park, Pennsylvania 16802
Else Breval
Affiliation:
Materials Research Institute, Penn State University, University Park, Pennsylvania 16802
Joseph P. Dougherty
Affiliation:
Materials Research Institute, Penn State University, University Park, Pennsylvania 16802
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Abstract

The change in the orthorhombic structure of PbZrO3 was studied as a function of the La substitution for Pb and Ti substitution for Zr. Two types of changes can occur: (1) a change in the atom coordinates toward the positions for a perfect cubic perovskite lattice; and (2) a change of orthorhombic unit cell parameters so that ao, bo, and co exactly fit with the cubic cell parameter ac. Therefore, ao=ac√2, bo=ac.2√2, and co=ac.2, where ao, bo, and co are the orthorhombic cell parameters, and ac is the cubic cell parameter. Substitution of Pb by La in the orthorhombic PLZT leads to both a change in atom coordinates and a change in unit cell parameters toward the perfect cubic structure, especially for La≥4. Substitution of Zr by Ti in the orthorhombic PLZT leads to similar atom coordinate changes, but the unit cell parameters do not change. The composition 0/92.5/7.5 contains a major tetragonal phase and a minor orthorhombic phase. There are only small differences in the orthorhombic structure between the A and the B composition of PLZT. The A composition has a structure closer to the cubic structure than the B composition.

Keywords

powder diffractionperovskite structure
Type
New Diffraction Data
Information
Powder Diffraction , Volume 17 , Issue 4 , December 2002 , pp. 295 - 300
Copyright
Copyright © Cambridge University Press 2002

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References

Cullity, B. D. (1977). Elements of X-Ray Diffraction (Addison-Wesley, Menlo Park, CA.)Google Scholar
Dougherty, J. P., Breval, E., Wang, C., Crespi, A., Duva, F., and Stewart, M.. (2002). “Capacitative Energy Storage in PLZT Ceramics,” Proceedings of the 22nd Annual Meeting: Capacitor and Resistor Technology Symposium, March 24–28, New Orleans, Louisiana.Google Scholar
Haertling, G. H. (1986). “Piezoelectric and Electrooptic Ceramics,” pp. 139–225 in “Ceramic Materials for Electronics, Processing, Properties and Applications” in the series Electrical Engineering and Electronics, edited by Buchanan, Relva C. (Marcel Dekker, New York).Google Scholar
Härdtl, K. H.and Hennings, D. (1972). “Distribution of A-site and B-site vacancies in (Pb,La)(Ti,Zr)O3 ceramics,” Ceram. Soc. JACTAW 55, 230–231. jac, JACTAW CrossRefGoogle Scholar
Inorganic Crystal Structure Database. (1998). ICSD collection code no. 31154, FIZ Karlsruhe, Germany D76012.Google Scholar
International Centre for Diffraction Data Powder Diffraction File. (2000). ICDD card no. 35-739, Newtown Square, PA 19073-3273.Google Scholar
Kraus, W. and Nolz, G.. (2000). “Powder Cell, Version 2.3,” Federal Institute for Materials Research and Testing, Berlin, Germany.Google Scholar
Michel, C., Moreau, J.-M., Achenbach, G. D., Gerson, R., and James, W. J. (1969). “Atomic structures of two rhombohedral ferroelectric phases in the Pb(Zr,Ti)O3 solid solution series,” Solid State Commun. SSCOA4 7, 865–68. ssc, SSCOA4 CrossRefGoogle Scholar
Moreau, J.-M., Michel, C., Gerson, R., and James, W. J. (1970). “Atomic displacement relationship to Rhombohedral deformation in some perovskite-type compounds,” Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. ACBCAR 26, 1425–1428. acb, ACBCAR CrossRefGoogle Scholar
Park, H.-B., Park, C. Y., Hong, Y.-S., Kim, K., and Kim, S.-J. (1999). “Structural and dielectric properties of PLZT ceramics modified with lanthanum ions,” J. Am. Ceram. Soc. JACTAW 82, 94–102. jac, JACTAW CrossRefGoogle Scholar
Park, S.-E., Markowski, K., Yoshikawa, S., and Cross, L. E. (1997). “Effect of electrical properties of barium and strontium additions in the lead lanthanum zirconate stannate titanate system,” J. Am. Ceram. Soc. JACTAW 80, 407–412. jac, JACTAW CrossRefGoogle Scholar
Polli, A. D., Lange, F. F., and Levi, C. G. (2000). “Metastability of the fluorite, pyrochlore, and perovskite structures in the PbO-ZrO2-TiO2 system,” J. Am. Ceram. Soc. JACTAW 83, 873–881. jac, JACTAW CrossRefGoogle Scholar
Schultze, W. A., Miller, T. G., and Biggers, J. V. (1975). “Solubility limit of La in the lead zirconate-titanate system,” J. Am. Ceram. Soc. JACTAW 58, 21–23. jac, JACTAW CrossRefGoogle Scholar
wa Gachigi, K. (1997). “Electrical energy storage in antiferroelectric-ferroelectric phase switching, chemically modified lead zirconate ceramics,” Ph.D. Thesis, The Pennsylvania State University.Google Scholar
Xu, B., Ye, Y., Wang, Q.-M., Pai, N. G., and Cross, L. E. (2000). “Effect of compositional variations on electrical properties in phase switching (Pb,La)(Zr,Ti,Sn)O3 thin and thick films,” J. Mater. Sci. JMTSAS 35, 6027–6033. jmt, JMTSAS CrossRefGoogle Scholar