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Title: Technology and Dielectric Properties of the KNLN Doped with Nd3+ and Pr3+ Ions
Authors: Bochenek, Dariusz
Osińska, Katarzyna
Mankiewicz, Marcin
Niemiec, Przemysław
Dercz, Grzegorz
Keywords: lead free ceramics; sodium potassium niobate; ferroelectrics; doped
Issue Date: 2020
Citation: “Archives of Metallurgy and Materials” Vol. 65, iss. 3 (2020), s. 1183-1188
Abstract: The paper presents the technology and basic properties of three compositions of lead-free ceramics: (i) (K0.44Na0.52Li0.04) NbO3, (ii) (K0.44Na0.52Li0.04)NbO3+0.5%mol Nd2O3 and (iii) K0.44Na0.52Li0.04)NbO3+0.5%mol Pr2O3. Powders of the designed compositions based on KNLN were obtained with the classic ceramic technology, as a result of solid phase synthesis, from a mixture of simple oxides and carbonates. The synthesis of ceramic powders was carried out at Ts = 900°C for ts = 4 h, while compaction by free sintering at Tsint = 1100°C for tsint = 2 h. XRD studies have shown that doping with praseodymium and neodymium promotes the formation of the tetragonal phase in the base composition (K0.44Na0.52Li0.04)NbO3 at lower temperatures. On the other hand, microstructural tests have shown that the admixture of neodymium and praseodymium improves the sinterability of ceramic samples during the technological process; however, the ceramic samples still exhibit high porosity.
DOI: 10.24425/amm.2020.133237
ISSN: 2300-1909
Appears in Collections:Artykuły (WNŚiT)

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