caa a22 4500 463215494 CHVBK 20180405153155.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3924-x doi (NATIONALLICENCE)springer-10.1007/s00339-007-3924-x Dielectric properties of Bi2PbNb2O9 ceramics prepared by different techniques [Elektronische Daten] [G. Gritzner, A. Pissenberger] Different techniques for the synthesis of Bi2PbNb2O9, namely the mixed oxide technique, molten salt synthesis, hydrothermal synthesis, co-precipitation and the tartaric acid gel method were investigated and the results on the dielectric properties are reported. The heat-treatment of the precursor powders was the same for all precursor powders. Sintering at 1040°C under ambient pressure resulted in polycrystalline specimens, while hot-forging at 1040°C with a pressure of 20MPa produced c-axis aligned samples. Phase composition and crystallite orientation of the sintered bodies were analyzed by X-ray diffraction. Single-phase material was obtained in all cases. Hot-forging not only yielded c-axis orientation, but also increased the relative densities above 99.4%. The relative permittivity decreased for c-axis oriented material compared to polycrystalline ceramics. Values for the relative permittivity for the hot-forged specimens at 100°C at 100kHz varied between 165 and 250, depending on the fabrication method. The Curie temperature for the c-axis aligned samples was 568°C, independent of the nature of the precursor powders. Springer-Verlag, 2007 Gritzner G. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, 4040, Linz, Austria aut Pissenberger A. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, 4040, Linz, Austria aut Applied Physics A Springer-Verlag 87/4(2007-06-01), 807-811 0947-8396 87:4<807 2007 87 339 https://doi.org/10.1007/s00339-007-3924-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3924-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gritzner G. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, 4040, Linz, Austria aut NATIONALLICENCE 700 1- Pissenberger A. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, 4040, Linz, Austria aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/4(2007-06-01), 807-811 0947-8396 87:4<807 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer