Lead-free rare earth-modified (K0.44Na0.52Li0.04)(Nb0.86Ta0.1Sb0.04)O3 ceramics: phase structure, electrical and photoluminescence properties

Archives of Metallurgy and Materials

“…For many years, the solid solution of lead zirconate and lead titanate (PZT) has been the main material used in the construction of piezoelectric sensors and transducers in microelectronics. The ability to modify the basic chemical composition of PZT, as well as developed and properly carried out technology, allows the production of ceramic materials for specific applications in microelectronics [1][2][3]4]. Multicomponent PZT is the most widely used piezoelectric due to the very good piezoelectric properties thereof (especially for compositions from the morphotropic area).…”

“…Currently, a large interest in KNN ceramics is observed, in the direction of increasing its application possibilities, i.e. improving sinterability (during the technological process), physical properties and stability of parameters [1][2][3]. At room temperature, sodium potassium niobate has an ABO 3 perovskite type crystal structure.…”

“…However, despite the good properties of KNN, due to technological difficulties, it is currently not possible to use this ceramics on a large scale. The problem is high volatility of al- kaline elements in the sintering process, low density of sintered samples and high hygroscopicity of the substrates used for the synthesis of ceramic powders in the solid phase [2][3]14]. Admixing KNN ceramics, even with small amounts of lithium Li + ions, can improve the sinterability of the material and can have a positive effect on the value of the optimal sintering temperature, thereby improving the dielectric properties of the material [15][16][17][18].…”

“…In order to improve the density of KNN ceramics, hot pressing of the sintering method can be used. However, the hot pressing method is quite expensive and -due to its specificity -is not used in the industry for high volume production [3].…”

Noncontact temperature‐dependent fluorescence depicting phase transition in Nd3+‐doped (K0.5Na0.5)NbO3 ceramics

“…Among rare earth ions (RE 3+ ), Nd 3+ possess important luminescent bands of 4 f ‐4 f transitions and excellent luminescent properties in the near‐infrared (NIR) region. The NIR luminescence of Nd 3+ exhibits strong penetrability, narrow line width, and free of background for biological analysis, showing great potential in military and medical applications . Besides, the 4 F 3/2 emitting state can be expediently populated by commercially available laser diodes .…”