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7249304 
Journal Article 
TECHNOLOGY AND DIELECTRIC PROPERTIES OF THE KNLN DOPED WITH Nd3+ AND Pr3+ IONS 
Bochenek, D; Osinska, K; Mankiewicz, M; Niemiec, P; Dercz, G; , 
2020 
POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS 
WARSZAWA 
1183-1188 
WOS:000548973700006 
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 T-s = 900 degrees C for t(s) = 4 h, while compaction by free sintering at T-sint= 1100 degrees C for t or T-sint = 2 h.XRD studies have shown that doping with praseodymium and neodymium promotes the fonnation 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.