caa a22 4500 467927421 CHVBK 20180406152933.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1134/S0020168506050219 doi (NATIONALLICENCE)springer-10.1134/S0020168506050219 Effect of MnO2, Bi2O3, and ZnO additions on the electrical properties of lead zirconate titanate piezoceramics [Elektronische Daten] [V. Klimov, N. Selikova, A. Bronnikov] The effect of manganese dioxide additions on the electrical properties of lead zirconate titanate (PZT) piezoceramics has been investigated. The results demonstrate that, taken alone, manganese dioxide does not ensure the formation of hard PZT. The valence state of manganese in the piezoceramics is shown to be 4+ if no other dopants are present and 3+ if manganese is introduced in combination with Bi and Zn. Microstructural examination indicates that the grain size of the singly doped ceramics is 5-15 µm, while that of the codoped ceramics is 1-3 µm. The polarization current curves of the piezoceramics containing manganese, bismuth, and zinc oxides have extra maxima, which points to significant internal fields. The manganese is shown to reside at grain boundaries. The conclusion is made that it is the composition of Mn-containing intergranular phases, rather than the presence of manganese ions, that plays a key role in the formation of hard piezoceramics. Pleiades Publishing, Inc., 2006 Klimov V. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut Selikova N. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut Bronnikov A. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut Inorganic Materials Nauka/Interperiodica 42/5(2006-05-01), 573-577 0020-1685 42:5<573 2006 42 10789 https://doi.org/10.1134/S0020168506050219 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0020168506050219 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Klimov V. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut NATIONALLICENCE 700 1- Selikova N. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut NATIONALLICENCE 700 1- Bronnikov A. Donetsk National University, Universitetskaya ul. 24, 83055, Donetsk, Ukraine aut NATIONALLICENCE 773 0- Inorganic Materials Nauka/Interperiodica 42/5(2006-05-01), 573-577 0020-1685 42:5<573 2006 42 10789 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer