Relationships between Sintering Conditions,Microstructure and Dielectric Properties of Lead Iron Niobate |
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| Affiliation: | 1. Graduate School Environmental Studies, Tohoku University, 6-6-01 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan;2. Institute of Multidisciplinary Research for Advanced Material, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;3. National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, AIST Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan;1. TOSA Innovative Human Development Programs, Kochi University, 2-5-1 Akebono-cho, Kochi-shi, Kochi 780-8520, Japan;2. Department of Mathematics and Physics, Faculty of Science and Technology, Kochi University, 2-5-1 Akebono-cho, Kochi-shi, Kochi 780-8520, Japan;1. Research Institute of Physics, Southern Federal University, 194 Stachki, Rostov-on-Don, 344090, Russia;2. Faculty of Physics, Southern Federal University, 5 Zorge st, Rostov-on-Don, 344090, Russia;3. Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India |
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| Abstract: | Lead iron niobate, Pb(Fe1/2Nb1/2)O3 (PFN) ceramics have been produced by sintering PFN powders synthesized from lead oxide (PbO) and iron niobate (FeNbO4), with an effective method developed for minimising the level of PbO loss during sintering. Attention has been focused on relationships between sintering conditions, phase formation, density, microstructural development and dielectric properties. The sintering temperature has been found to have a pronounced effect on the density, grain growth and dielectric properties of the sintered PFN ceramics, with maximum density and relative permittivity values obtained under sintering conditions of 1175°C for 2 h. The origin of the strong dependence of values of εr and tan δ on frequency is discussed. © |
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