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Proceedings Paper

Dielectric properties of PLZT prepared by three sol-gel methods
Author(s): Yoichi Ishimoto; Jun-ichi Matsushita; Chiharu Sakaki; Sridhar Komarneni
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Paper Abstract

Lead lanthanum zirconate titanate (PLZT) powders were prepared by three different sol-gel methods. In one process, the precursor materials used were lead hydroxide, lanthanum nitrate hexahydrate, zirconium tetra-n-butoxide, and titanium tetraisopropoxide along with 2-methoxyethanol as a solvent. An amount of distilled water equivalent to the total molar concentration of Pb, Ti, and Zr was added to the above solution. In a second process, the precursor materials used were lead acetate, lanthanum nitrate hexahydrate, zirconium tetra-n-butoxide, and titanium tetraisopropoxide along with 2- methoxyethanol as a solvent. An amount of distilled water equivalent to the total molar concentration of Pb, Ti, and Zr was added to the above solution. In a third process, the precursor materials used were lead acetate, lanthanum nitrate hexahydrate, zirconyl nitrate, and titanium tetra-n-butoxide. Distilled water and acetic acid were used as solvents. Triethyleneglycol or diethanolamine was used in each of the above processes as a chemical additive to modify the hydrolysis and condensation of the solution. Thermal gravimetric-differential thermal analysis was used to study the weight changes of the dried gels as a function of annealing temperature. Dried samples were heated for 1 h in the range of 673 to 1073 K in air atmosphere. The crystalline phases of calcined PLZT powders were identified by X-ray diffraction analysis. The calcined powder was pressed by CIP at 100 MPa. The samples were sintered at 1173 K, 1273 K, and 1323 K and their relative dielectric constants were measured.

Paper Details

Date Published: 6 April 2001
PDF: 11 pages
Proc. SPIE 4234, Smart Materials, (6 April 2001); doi: 10.1117/12.424427
Show Author Affiliations
Yoichi Ishimoto, Tokai Univ. (Japan)
Jun-ichi Matsushita, Tokai Univ. and The Pennsylvania State Univ. (Japan)
Chiharu Sakaki, The Pennsylvania State Univ. (United States)
Sridhar Komarneni, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 4234:
Smart Materials
Alan R. Wilson; Hiroshi Asanuma, Editor(s)

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