Synthesis and Dielectric Properties of Solution Sol-Gel-Derived 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 Ceramics |
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| Authors: | Palaniappan Ravindranathan Sridhar Komarneni Amar S. Bhalla Rustum Roy |
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| Affiliation: | Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802 |
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| Abstract: | A solution sol-gel method has been developed to prepare 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 (0.9PMN-0.1PT) ceramics. During the processing the gel first converted to cubic pyrochlore phase at a calcination temperature of 600°C followed by the formation of pure perovskite phase at 775°C. The ceramics sintered at 1250°C for 4 h showed ≈98% of the theoretical density. The room-temperature dielectric constant of the pellets sintered at 1250°C showed a maximum value of 25035 at 1 kHz. Sintering studies at different temperatures revealed that the dielectric constant increased with increasing grain size in these ceramics. |
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| Keywords: | sol-gel lead magnesium niobates dielectric materials synthesis sinter |
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