Binary, Ternary and Four-Component Systems Based on Sodium Niobate: Phase Diagrams of States, the Role of the Number of Components and Defectiveness in the Formation of the Properties

Multi-element ferroactive materials based on KNN-PZT compositions with fundamentally different physical properties

“…In ferroelectric materials science, a quality leap in the creation of practically demanded compositions dates back to the early 70s of the last century, when the first four-and five-component systems were atomically constructed in Russia (Research Institute of Physics of Rostov State University) based on PZT (Pb(Ti, Zr)O 3 ), corresponding to the formula PZT-PbB 0 1Àα1 B 00 α2 ðn ¼ 2; 3ÞO 3 (n ¼ 2, 3), where B 0 -pentavalent and hexavalent cations; B 00 -monovalent, divalent and trivalent cations; α-1/2; 1/3; 1/4depending on valencies B 0 , B΄΄. More than 100 copyright certificates and patents have been obtained for the piezoceramic materials of many of these systems [1].…”

“…It should be noted, that with an increase in the number of components, the composition regions with combinations of characteristics optimal for various applications expand, the variety of options for solid solutions (SS) grows, and the most important electrophysical parameters increase. All this indicates the significant advantages of MS over their simpler components [1], which, moreover, may have fundamentally different properties. Recently, the attention of researchers, including us, has been riveted to them in connection with the possibility of the formation of a new set of parameters combining the heterogeneous functionality of the macroresponses of basic compositions [1].…”

“…All this indicates the significant advantages of MS over their simpler components [1], which, moreover, may have fundamentally different properties. Recently, the attention of researchers, including us, has been riveted to them in connection with the possibility of the formation of a new set of parameters combining the heterogeneous functionality of the macroresponses of basic compositions [1].…”

“…The MR search method consists in preliminary approximation of its boundary surfaces by planes, further refinement of the shape and length, and in identification of zones of optimal combinations of parameters [5]. Moreover, the approximation more reliably reflects the position of the MR in the MS, the more informative the information on the components of the MS of the initial simpler systems are Taking into account the absence of such data in many of them and, as a consequence, the uncertainty of the localization of the MR in the indicated MS based on PZT and AMN, in both cases we preliminary studied the SS of only one beam connecting SS with extreme properties À (Na 0.875 Li 0.125 ) NbO 3 , (Na 0.5 K 0.5 )NbO 3 , Pb(Ti 0.5 Zr 0.5 )O 3 in the tetrahedra of the compositions [1,5,6]. This way of studying MS in this case seems to be the most reasonable because of the possibility of characterizing the system with a minimum number of experiments.…”

Obtaining, structure, microstructure and dielectric characteristics of ceramics and thin films of ferro-piezoelectric materials based on the PZT system

“…[12][13][14][15] Work on the creation of this type of structures has been carried out for more than 40 years at the Scientific Research Institute of Physics of the Southern Federal University. 16 One of the results, of which was the development of the industrially demanded multicomponent ceramic material PCR-13 (Rostov piezoceramics) based on the four-component system PbTiO 3 -PbZrO 3 -PbNb 2=3 -Mn 1=3 O 3 -PbNb 2=3 Zn 1=3 O 3 , which has a high stability of the resonant frequency used in frequency-selective devices, resonators, motors, ultrasonic cleaners, etc. 17 Earlier in Ref.…”